e534343914
This makes PCF13 much faster than it previously was. The performance difference between PCF5 and PCF13 is now much lower.
2354 lines
69 KiB
GLSL
2354 lines
69 KiB
GLSL
/* clang-format off */
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[vertex]
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#define M_PI 3.14159265359
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#define SHADER_IS_SRGB false
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/*
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from VisualServer:
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ARRAY_VERTEX=0,
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ARRAY_NORMAL=1,
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ARRAY_TANGENT=2,
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ARRAY_COLOR=3,
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ARRAY_TEX_UV=4,
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ARRAY_TEX_UV2=5,
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ARRAY_BONES=6,
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ARRAY_WEIGHTS=7,
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ARRAY_INDEX=8,
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*/
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// hack to use uv if no uv present so it works with lightmap
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/* INPUT ATTRIBS */
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layout(location = 0) in highp vec4 vertex_attrib;
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/* clang-format on */
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#ifdef ENABLE_OCTAHEDRAL_COMPRESSION
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layout(location = 1) in vec4 normal_tangent_attrib;
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#else
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layout(location = 1) in vec3 normal_attrib;
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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#ifdef ENABLE_OCTAHEDRAL_COMPRESSION
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// packed into normal_attrib zw component
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#else
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layout(location = 2) in vec4 tangent_attrib;
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#endif
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#endif
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#if defined(ENABLE_COLOR_INTERP)
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layout(location = 3) in vec4 color_attrib;
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#endif
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#if defined(ENABLE_UV_INTERP)
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layout(location = 4) in vec2 uv_attrib;
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#endif
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#if defined(ENABLE_UV2_INTERP) || defined(USE_LIGHTMAP)
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layout(location = 5) in vec2 uv2_attrib;
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#endif
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#ifdef USE_SKELETON
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layout(location = 6) in uvec4 bone_indices; // attrib:6
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layout(location = 7) in highp vec4 bone_weights; // attrib:7
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#endif
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#ifdef USE_INSTANCING
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layout(location = 8) in highp vec4 instance_xform0;
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layout(location = 9) in highp vec4 instance_xform1;
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layout(location = 10) in highp vec4 instance_xform2;
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layout(location = 11) in lowp vec4 instance_color;
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#if defined(ENABLE_INSTANCE_CUSTOM)
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layout(location = 12) in highp vec4 instance_custom_data;
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#endif
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#endif
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layout(std140) uniform SceneData { // ubo:0
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highp mat4 projection_matrix;
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highp mat4 inv_projection_matrix;
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highp mat4 camera_inverse_matrix;
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highp mat4 camera_matrix;
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mediump vec4 ambient_light_color;
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mediump vec4 bg_color;
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mediump vec4 fog_color_enabled;
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mediump vec4 fog_sun_color_amount;
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mediump float ambient_energy;
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mediump float bg_energy;
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mediump float z_offset;
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mediump float z_slope_scale;
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highp float shadow_dual_paraboloid_render_zfar;
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highp float shadow_dual_paraboloid_render_side;
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highp vec2 viewport_size;
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highp vec2 screen_pixel_size;
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highp vec2 shadow_atlas_pixel_size;
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highp vec2 directional_shadow_pixel_size;
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highp float time;
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highp float z_far;
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mediump float reflection_multiplier;
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mediump float subsurface_scatter_width;
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mediump float ambient_occlusion_affect_light;
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mediump float ambient_occlusion_affect_ao_channel;
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mediump float opaque_prepass_threshold;
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bool fog_depth_enabled;
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highp float fog_depth_begin;
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highp float fog_depth_end;
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mediump float fog_density;
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highp float fog_depth_curve;
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bool fog_transmit_enabled;
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highp float fog_transmit_curve;
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bool fog_height_enabled;
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highp float fog_height_min;
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highp float fog_height_max;
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highp float fog_height_curve;
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int view_index;
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};
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uniform highp mat4 world_transform;
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#ifdef USE_LIGHTMAP
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uniform highp vec4 lightmap_uv_rect;
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#endif
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#ifdef USE_LIGHT_DIRECTIONAL
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layout(std140) uniform DirectionalLightData { //ubo:3
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highp vec4 light_pos_inv_radius;
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mediump vec4 light_direction_attenuation;
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mediump vec4 light_color_energy;
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mediump vec4 light_params; // cone attenuation, angle, specular, shadow enabled,
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mediump vec4 light_clamp;
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mediump vec4 shadow_color_contact;
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highp mat4 shadow_matrix1;
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highp mat4 shadow_matrix2;
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highp mat4 shadow_matrix3;
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highp mat4 shadow_matrix4;
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mediump vec4 shadow_split_offsets;
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};
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#endif
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#ifdef USE_VERTEX_LIGHTING
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//omni and spot
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struct LightData {
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highp vec4 light_pos_inv_radius;
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mediump vec4 light_direction_attenuation;
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mediump vec4 light_color_energy;
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mediump vec4 light_params; // cone attenuation, angle, specular, shadow enabled,
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mediump vec4 light_clamp;
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mediump vec4 shadow_color_contact;
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highp mat4 shadow_matrix;
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};
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layout(std140) uniform OmniLightData { //ubo:4
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LightData omni_lights[MAX_LIGHT_DATA_STRUCTS];
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};
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layout(std140) uniform SpotLightData { //ubo:5
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LightData spot_lights[MAX_LIGHT_DATA_STRUCTS];
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};
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#ifdef USE_FORWARD_LIGHTING
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uniform int omni_light_indices[MAX_FORWARD_LIGHTS];
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uniform int omni_light_count;
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uniform int spot_light_indices[MAX_FORWARD_LIGHTS];
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uniform int spot_light_count;
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#endif
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out vec4 diffuse_light_interp;
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out vec4 specular_light_interp;
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void light_compute(vec3 N, vec3 L, vec3 V, vec3 light_color, float roughness, inout vec3 diffuse, inout vec3 specular) {
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float NdotL = dot(N, L);
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float cNdotL = max(NdotL, 0.0); // clamped NdotL
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float NdotV = dot(N, V);
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float cNdotV = max(NdotV, 0.0);
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#if defined(DIFFUSE_OREN_NAYAR)
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vec3 diffuse_brdf_NL;
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#else
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float diffuse_brdf_NL; // BRDF times N.L for calculating diffuse radiance
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#endif
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#if defined(DIFFUSE_LAMBERT_WRAP)
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// energy conserving lambert wrap shader
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diffuse_brdf_NL = max(0.0, (NdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness)));
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#elif defined(DIFFUSE_OREN_NAYAR)
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{
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// see http://mimosa-pudica.net/improved-oren-nayar.html
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float LdotV = dot(L, V);
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float s = LdotV - NdotL * NdotV;
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float t = mix(1.0, max(NdotL, NdotV), step(0.0, s));
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float sigma2 = roughness * roughness; // TODO: this needs checking
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vec3 A = 1.0 + sigma2 * (-0.5 / (sigma2 + 0.33) + 0.17 * diffuse_color / (sigma2 + 0.13));
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float B = 0.45 * sigma2 / (sigma2 + 0.09);
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diffuse_brdf_NL = cNdotL * (A + vec3(B) * s / t) * (1.0 / M_PI);
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}
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#else
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// lambert by default for everything else
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diffuse_brdf_NL = cNdotL * (1.0 / M_PI);
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#endif
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diffuse += light_color * diffuse_brdf_NL;
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if (roughness > 0.0) {
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// D
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float specular_brdf_NL = 0.0;
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#if !defined(SPECULAR_DISABLED)
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//normalized blinn always unless disabled
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vec3 H = normalize(V + L);
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float cNdotH = max(dot(N, H), 0.0);
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float shininess = exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25;
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float blinn = pow(cNdotH, shininess);
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blinn *= (shininess + 2.0) * (1.0 / (8.0 * M_PI));
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specular_brdf_NL = blinn;
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#endif
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specular += specular_brdf_NL * light_color;
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}
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}
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#ifdef USE_PHYSICAL_LIGHT_ATTENUATION
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float get_omni_attenuation(float distance, float inv_range, float decay) {
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float nd = distance * inv_range;
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nd *= nd;
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nd *= nd; // nd^4
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nd = max(1.0 - nd, 0.0);
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nd *= nd; // nd^2
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return nd * pow(max(distance, 0.0001), -decay);
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}
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#endif
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void light_process_omni(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness, inout vec3 diffuse, inout vec3 specular) {
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vec3 light_rel_vec = omni_lights[idx].light_pos_inv_radius.xyz - vertex;
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float light_length = length(light_rel_vec);
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#ifdef USE_PHYSICAL_LIGHT_ATTENUATION
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vec3 light_attenuation = vec3(get_omni_attenuation(light_length, omni_lights[idx].light_pos_inv_radius.w, omni_lights[idx].light_direction_attenuation.w));
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#else
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float normalized_distance = light_length * omni_lights[idx].light_pos_inv_radius.w;
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vec3 light_attenuation = vec3(pow(max(1.0 - normalized_distance, 0.0), omni_lights[idx].light_direction_attenuation.w));
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#endif
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light_compute(normal, normalize(light_rel_vec), eye_vec, omni_lights[idx].light_color_energy.rgb * light_attenuation, roughness, diffuse, specular);
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}
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void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness, inout vec3 diffuse, inout vec3 specular) {
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vec3 light_rel_vec = spot_lights[idx].light_pos_inv_radius.xyz - vertex;
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float light_length = length(light_rel_vec);
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#ifdef USE_PHYSICAL_LIGHT_ATTENUATION
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vec3 light_attenuation = vec3(get_omni_attenuation(light_length, spot_lights[idx].light_pos_inv_radius.w, spot_lights[idx].light_direction_attenuation.w));
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#else
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float normalized_distance = light_length * spot_lights[idx].light_pos_inv_radius.w;
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vec3 light_attenuation = vec3(pow(max(1.0 - normalized_distance, 0.001), spot_lights[idx].light_direction_attenuation.w));
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#endif
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vec3 spot_dir = spot_lights[idx].light_direction_attenuation.xyz;
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float spot_cutoff = spot_lights[idx].light_params.y;
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float scos = max(dot(-normalize(light_rel_vec), spot_dir), spot_cutoff);
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float spot_rim = (1.0 - scos) / (1.0 - spot_cutoff);
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light_attenuation *= 1.0 - pow(max(spot_rim, 0.001), spot_lights[idx].light_params.x);
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light_compute(normal, normalize(light_rel_vec), eye_vec, spot_lights[idx].light_color_energy.rgb * light_attenuation, roughness, diffuse, specular);
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}
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#endif
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#ifdef ENABLE_OCTAHEDRAL_COMPRESSION
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vec3 oct_to_vec3(vec2 e) {
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vec3 v = vec3(e.xy, 1.0 - abs(e.x) - abs(e.y));
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float t = max(-v.z, 0.0);
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v.xy += t * -sign(v.xy);
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return normalize(v);
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}
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#endif
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/* Varyings */
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out highp vec3 vertex_interp;
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out vec3 normal_interp;
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#if defined(ENABLE_COLOR_INTERP)
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out vec4 color_interp;
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#endif
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#if defined(ENABLE_UV_INTERP)
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out vec2 uv_interp;
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#endif
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#if defined(ENABLE_UV2_INTERP) || defined(USE_LIGHTMAP)
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out vec2 uv2_interp;
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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out vec3 tangent_interp;
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out vec3 binormal_interp;
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#endif
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#if defined(USE_MATERIAL)
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/* clang-format off */
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layout(std140) uniform UniformData { // ubo:1
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MATERIAL_UNIFORMS
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};
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/* clang-format on */
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#endif
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/* clang-format off */
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VERTEX_SHADER_GLOBALS
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/* clang-format on */
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#ifdef RENDER_DEPTH_DUAL_PARABOLOID
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out highp float dp_clip;
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#endif
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#define SKELETON_TEXTURE_WIDTH 256
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#ifdef USE_SKELETON
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uniform highp sampler2D skeleton_texture; // texunit:-1
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#endif
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out highp vec4 position_interp;
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// FIXME: This triggers a Mesa bug that breaks rendering, so disabled for now.
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// See GH-13450 and https://bugs.freedesktop.org/show_bug.cgi?id=100316
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//invariant gl_Position;
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void main() {
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highp vec4 vertex = vertex_attrib; // vec4(vertex_attrib.xyz * data_attrib.x,1.0);
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highp mat4 world_matrix = world_transform;
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#ifdef USE_INSTANCING
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{
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highp mat4 m = mat4(instance_xform0, instance_xform1, instance_xform2, vec4(0.0, 0.0, 0.0, 1.0));
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world_matrix = world_matrix * transpose(m);
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}
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#endif
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#ifdef ENABLE_OCTAHEDRAL_COMPRESSION
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vec3 normal = oct_to_vec3(normal_tangent_attrib.xy);
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#else
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vec3 normal = normal_attrib;
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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#ifdef ENABLE_OCTAHEDRAL_COMPRESSION
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vec3 tangent = oct_to_vec3(vec2(normal_tangent_attrib.z, abs(normal_tangent_attrib.w) * 2.0 - 1.0));
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float binormalf = sign(normal_tangent_attrib.w);
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#else
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vec3 tangent = tangent_attrib.xyz;
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float binormalf = tangent_attrib.a;
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#endif
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#endif
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#if defined(ENABLE_COLOR_INTERP)
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color_interp = color_attrib;
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#if defined(USE_INSTANCING)
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color_interp *= instance_color;
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#endif
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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vec3 binormal = normalize(cross(normal, tangent) * binormalf);
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#endif
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#if defined(ENABLE_UV_INTERP)
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uv_interp = uv_attrib;
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#endif
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#if defined(USE_LIGHTMAP)
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uv2_interp = lightmap_uv_rect.zw * uv2_attrib + lightmap_uv_rect.xy;
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#elif defined(ENABLE_UV2_INTERP)
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uv2_interp = uv2_attrib;
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#endif
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#ifdef OVERRIDE_POSITION
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highp vec4 position;
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#endif
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#if defined(USE_INSTANCING) && defined(ENABLE_INSTANCE_CUSTOM)
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vec4 instance_custom = instance_custom_data;
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#else
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vec4 instance_custom = vec4(0.0);
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#endif
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highp mat4 local_projection = projection_matrix;
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//using world coordinates
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#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
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vertex = world_matrix * vertex;
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#if defined(ENSURE_CORRECT_NORMALS)
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mat3 normal_matrix = mat3(transpose(inverse(world_matrix)));
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normal = normal_matrix * normal;
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#else
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normal = normalize((world_matrix * vec4(normal, 0.0)).xyz);
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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tangent = normalize((world_matrix * vec4(tangent, 0.0)).xyz);
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binormal = normalize((world_matrix * vec4(binormal, 0.0)).xyz);
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#endif
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#endif
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float roughness = 1.0;
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//defines that make writing custom shaders easier
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#define projection_matrix local_projection
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#define world_transform world_matrix
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#ifdef USE_SKELETON
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{
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//skeleton transform
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ivec4 bone_indicesi = ivec4(bone_indices); // cast to signed int
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ivec2 tex_ofs = ivec2(bone_indicesi.x % 256, (bone_indicesi.x / 256) * 3);
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highp mat4 m;
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m = mat4(
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texelFetch(skeleton_texture, tex_ofs, 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 1), 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 2), 0),
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vec4(0.0, 0.0, 0.0, 1.0)) *
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bone_weights.x;
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tex_ofs = ivec2(bone_indicesi.y % 256, (bone_indicesi.y / 256) * 3);
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m += mat4(
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texelFetch(skeleton_texture, tex_ofs, 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 1), 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 2), 0),
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vec4(0.0, 0.0, 0.0, 1.0)) *
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bone_weights.y;
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tex_ofs = ivec2(bone_indicesi.z % 256, (bone_indicesi.z / 256) * 3);
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m += mat4(
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texelFetch(skeleton_texture, tex_ofs, 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 1), 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 2), 0),
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vec4(0.0, 0.0, 0.0, 1.0)) *
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bone_weights.z;
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tex_ofs = ivec2(bone_indicesi.w % 256, (bone_indicesi.w / 256) * 3);
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m += mat4(
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texelFetch(skeleton_texture, tex_ofs, 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 1), 0),
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texelFetch(skeleton_texture, tex_ofs + ivec2(0, 2), 0),
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vec4(0.0, 0.0, 0.0, 1.0)) *
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bone_weights.w;
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|
|
world_matrix = world_matrix * transpose(m);
|
|
}
|
|
#endif
|
|
|
|
float point_size = 1.0;
|
|
|
|
highp mat4 modelview = camera_inverse_matrix * world_matrix;
|
|
{
|
|
/* clang-format off */
|
|
|
|
VERTEX_SHADER_CODE
|
|
|
|
/* clang-format on */
|
|
}
|
|
|
|
gl_PointSize = point_size;
|
|
|
|
// using local coordinates (default)
|
|
#if !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED)
|
|
|
|
vertex = modelview * vertex;
|
|
|
|
#if defined(ENSURE_CORRECT_NORMALS)
|
|
mat3 normal_matrix = mat3(transpose(inverse(modelview)));
|
|
normal = normal_matrix * normal;
|
|
#else
|
|
normal = normalize((modelview * vec4(normal, 0.0)).xyz);
|
|
#endif
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
|
|
|
|
tangent = normalize((modelview * vec4(tangent, 0.0)).xyz);
|
|
binormal = normalize((modelview * vec4(binormal, 0.0)).xyz);
|
|
#endif
|
|
#endif
|
|
|
|
//using world coordinates
|
|
#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
|
|
|
|
vertex = camera_inverse_matrix * vertex;
|
|
normal = normalize((camera_inverse_matrix * vec4(normal, 0.0)).xyz);
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
|
|
|
|
tangent = normalize((camera_inverse_matrix * vec4(tangent, 0.0)).xyz);
|
|
binormal = normalize((camera_inverse_matrix * vec4(binormal, 0.0)).xyz);
|
|
#endif
|
|
#endif
|
|
|
|
vertex_interp = vertex.xyz;
|
|
normal_interp = normal;
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
|
|
tangent_interp = tangent;
|
|
binormal_interp = binormal;
|
|
#endif
|
|
|
|
#ifdef RENDER_DEPTH
|
|
|
|
#ifdef RENDER_DEPTH_DUAL_PARABOLOID
|
|
|
|
vertex_interp.z *= shadow_dual_paraboloid_render_side;
|
|
normal_interp.z *= shadow_dual_paraboloid_render_side;
|
|
|
|
dp_clip = vertex_interp.z; //this attempts to avoid noise caused by objects sent to the other parabolloid side due to bias
|
|
|
|
//for dual paraboloid shadow mapping, this is the fastest but least correct way, as it curves straight edges
|
|
|
|
highp vec3 vtx = vertex_interp + normalize(vertex_interp) * z_offset;
|
|
highp float distance = length(vtx);
|
|
vtx = normalize(vtx);
|
|
vtx.xy /= 1.0 - vtx.z;
|
|
vtx.z = (distance / shadow_dual_paraboloid_render_zfar);
|
|
vtx.z = vtx.z * 2.0 - 1.0;
|
|
|
|
vertex_interp = vtx;
|
|
|
|
#else
|
|
|
|
float z_ofs = z_offset;
|
|
z_ofs += (1.0 - abs(normal_interp.z)) * z_slope_scale;
|
|
vertex_interp.z -= z_ofs;
|
|
|
|
#endif //RENDER_DEPTH_DUAL_PARABOLOID
|
|
|
|
#endif //RENDER_DEPTH
|
|
|
|
#ifdef OVERRIDE_POSITION
|
|
gl_Position = position;
|
|
#else
|
|
gl_Position = projection_matrix * vec4(vertex_interp, 1.0);
|
|
#endif
|
|
|
|
position_interp = gl_Position;
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
|
|
|
|
diffuse_light_interp = vec4(0.0);
|
|
specular_light_interp = vec4(0.0);
|
|
|
|
#ifdef USE_FORWARD_LIGHTING
|
|
|
|
for (int i = 0; i < omni_light_count; i++) {
|
|
light_process_omni(omni_light_indices[i], vertex_interp, -normalize(vertex_interp), normal_interp, roughness, diffuse_light_interp.rgb, specular_light_interp.rgb);
|
|
}
|
|
|
|
for (int i = 0; i < spot_light_count; i++) {
|
|
light_process_spot(spot_light_indices[i], vertex_interp, -normalize(vertex_interp), normal_interp, roughness, diffuse_light_interp.rgb, specular_light_interp.rgb);
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_LIGHT_DIRECTIONAL
|
|
|
|
vec3 directional_diffuse = vec3(0.0);
|
|
vec3 directional_specular = vec3(0.0);
|
|
light_compute(normal_interp, -light_direction_attenuation.xyz, -normalize(vertex_interp), light_color_energy.rgb, roughness, directional_diffuse, directional_specular);
|
|
|
|
float diff_avg = dot(diffuse_light_interp.rgb, vec3(0.33333));
|
|
float diff_dir_avg = dot(directional_diffuse, vec3(0.33333));
|
|
if (diff_avg > 0.0) {
|
|
diffuse_light_interp.a = diff_dir_avg / (diff_avg + diff_dir_avg);
|
|
} else {
|
|
diffuse_light_interp.a = 1.0;
|
|
}
|
|
|
|
diffuse_light_interp.rgb += directional_diffuse;
|
|
|
|
float spec_avg = dot(specular_light_interp.rgb, vec3(0.33333));
|
|
float spec_dir_avg = dot(directional_specular, vec3(0.33333));
|
|
if (spec_avg > 0.0) {
|
|
specular_light_interp.a = spec_dir_avg / (spec_avg + spec_dir_avg);
|
|
} else {
|
|
specular_light_interp.a = 1.0;
|
|
}
|
|
|
|
specular_light_interp.rgb += directional_specular;
|
|
|
|
#endif //USE_LIGHT_DIRECTIONAL
|
|
|
|
#endif // USE_VERTEX_LIGHTING
|
|
}
|
|
|
|
/* clang-format off */
|
|
[fragment]
|
|
|
|
|
|
/* texture unit usage, N is max_texture_unity-N
|
|
|
|
1-skeleton
|
|
2-radiance
|
|
3-reflection_atlas
|
|
4-directional_shadow
|
|
5-shadow_atlas
|
|
6-decal_atlas
|
|
7-screen
|
|
8-depth
|
|
9-probe1
|
|
10-probe2
|
|
|
|
*/
|
|
|
|
uniform highp mat4 world_transform;
|
|
/* clang-format on */
|
|
|
|
#define M_PI 3.14159265359
|
|
#define SHADER_IS_SRGB false
|
|
|
|
/* Varyings */
|
|
|
|
#if defined(ENABLE_COLOR_INTERP)
|
|
in vec4 color_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_UV_INTERP)
|
|
in vec2 uv_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_UV2_INTERP) || defined(USE_LIGHTMAP)
|
|
in vec2 uv2_interp;
|
|
#endif
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
|
|
in vec3 tangent_interp;
|
|
in vec3 binormal_interp;
|
|
#endif
|
|
|
|
in highp vec3 vertex_interp;
|
|
in vec3 normal_interp;
|
|
|
|
/* PBR CHANNELS */
|
|
|
|
#ifdef USE_RADIANCE_MAP
|
|
|
|
layout(std140) uniform Radiance { // ubo:2
|
|
|
|
mat4 radiance_inverse_xform;
|
|
float radiance_ambient_contribution;
|
|
};
|
|
|
|
#define RADIANCE_MAX_LOD 5.0
|
|
|
|
uniform sampler2D irradiance_map; // texunit:-6
|
|
|
|
#ifdef USE_RADIANCE_MAP_ARRAY
|
|
|
|
uniform sampler2DArray radiance_map; // texunit:-2
|
|
|
|
vec3 textureDualParaboloid(sampler2DArray p_tex, vec3 p_vec, float p_roughness) {
|
|
vec3 norm = normalize(p_vec);
|
|
norm.xy /= 1.0 + abs(norm.z);
|
|
norm.xy = norm.xy * vec2(0.5, 0.25) + vec2(0.5, 0.25);
|
|
|
|
// we need to lie the derivatives (normg) and assume that DP side is always the same
|
|
// to get proper texture filtering
|
|
vec2 normg = norm.xy;
|
|
if (norm.z > 0.0) {
|
|
norm.y = 0.5 - norm.y + 0.5;
|
|
}
|
|
|
|
// thanks to OpenGL spec using floor(layer + 0.5) for texture arrays,
|
|
// it's easy to have precision errors using fract() to interpolate layers
|
|
// as such, using fixed point to ensure it works.
|
|
|
|
float index = p_roughness * RADIANCE_MAX_LOD;
|
|
int indexi = int(index * 256.0);
|
|
vec3 base = textureGrad(p_tex, vec3(norm.xy, float(indexi / 256)), dFdx(normg), dFdy(normg)).xyz;
|
|
vec3 next = textureGrad(p_tex, vec3(norm.xy, float(indexi / 256 + 1)), dFdx(normg), dFdy(normg)).xyz;
|
|
return mix(base, next, float(indexi % 256) / 256.0);
|
|
}
|
|
|
|
#else
|
|
|
|
uniform sampler2D radiance_map; // texunit:-2
|
|
|
|
vec3 textureDualParaboloid(sampler2D p_tex, vec3 p_vec, float p_roughness) {
|
|
vec3 norm = normalize(p_vec);
|
|
norm.xy /= 1.0 + abs(norm.z);
|
|
norm.xy = norm.xy * vec2(0.5, 0.25) + vec2(0.5, 0.25);
|
|
if (norm.z > 0.0) {
|
|
norm.y = 0.5 - norm.y + 0.5;
|
|
}
|
|
return textureLod(p_tex, norm.xy, p_roughness * RADIANCE_MAX_LOD).xyz;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
/* Material Uniforms */
|
|
|
|
#if defined(USE_MATERIAL)
|
|
|
|
/* clang-format off */
|
|
layout(std140) uniform UniformData {
|
|
|
|
MATERIAL_UNIFORMS
|
|
|
|
};
|
|
/* clang-format on */
|
|
|
|
#endif
|
|
|
|
layout(std140) uniform SceneData {
|
|
highp mat4 projection_matrix;
|
|
highp mat4 inv_projection_matrix;
|
|
highp mat4 camera_inverse_matrix;
|
|
highp mat4 camera_matrix;
|
|
|
|
mediump vec4 ambient_light_color;
|
|
mediump vec4 bg_color;
|
|
|
|
mediump vec4 fog_color_enabled;
|
|
mediump vec4 fog_sun_color_amount;
|
|
|
|
mediump float ambient_energy;
|
|
mediump float bg_energy;
|
|
|
|
mediump float z_offset;
|
|
mediump float z_slope_scale;
|
|
highp float shadow_dual_paraboloid_render_zfar;
|
|
highp float shadow_dual_paraboloid_render_side;
|
|
|
|
highp vec2 viewport_size;
|
|
highp vec2 screen_pixel_size;
|
|
highp vec2 shadow_atlas_pixel_size;
|
|
highp vec2 directional_shadow_pixel_size;
|
|
|
|
highp float time;
|
|
highp float z_far;
|
|
mediump float reflection_multiplier;
|
|
mediump float subsurface_scatter_width;
|
|
mediump float ambient_occlusion_affect_light;
|
|
mediump float ambient_occlusion_affect_ao_channel;
|
|
mediump float opaque_prepass_threshold;
|
|
|
|
bool fog_depth_enabled;
|
|
highp float fog_depth_begin;
|
|
highp float fog_depth_end;
|
|
mediump float fog_density;
|
|
highp float fog_depth_curve;
|
|
bool fog_transmit_enabled;
|
|
highp float fog_transmit_curve;
|
|
bool fog_height_enabled;
|
|
highp float fog_height_min;
|
|
highp float fog_height_max;
|
|
highp float fog_height_curve;
|
|
|
|
int view_index;
|
|
};
|
|
|
|
/* clang-format off */
|
|
|
|
FRAGMENT_SHADER_GLOBALS
|
|
|
|
/* clang-format on */
|
|
|
|
//directional light data
|
|
|
|
#ifdef USE_LIGHT_DIRECTIONAL
|
|
|
|
layout(std140) uniform DirectionalLightData {
|
|
highp vec4 light_pos_inv_radius;
|
|
mediump vec4 light_direction_attenuation;
|
|
mediump vec4 light_color_energy;
|
|
mediump vec4 light_params; // cone attenuation, angle, specular, shadow enabled,
|
|
mediump vec4 light_clamp;
|
|
mediump vec4 shadow_color_contact;
|
|
highp mat4 shadow_matrix1;
|
|
highp mat4 shadow_matrix2;
|
|
highp mat4 shadow_matrix3;
|
|
highp mat4 shadow_matrix4;
|
|
mediump vec4 shadow_split_offsets;
|
|
};
|
|
|
|
uniform highp sampler2DShadow directional_shadow; // texunit:-4
|
|
|
|
#endif
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
|
|
in vec4 diffuse_light_interp;
|
|
in vec4 specular_light_interp;
|
|
#endif
|
|
// omni and spot
|
|
|
|
struct LightData {
|
|
highp vec4 light_pos_inv_radius;
|
|
mediump vec4 light_direction_attenuation;
|
|
mediump vec4 light_color_energy;
|
|
mediump vec4 light_params; // cone attenuation, angle, specular, shadow enabled,
|
|
mediump vec4 light_clamp;
|
|
mediump vec4 shadow_color_contact;
|
|
highp mat4 shadow_matrix;
|
|
};
|
|
|
|
layout(std140) uniform OmniLightData { // ubo:4
|
|
|
|
LightData omni_lights[MAX_LIGHT_DATA_STRUCTS];
|
|
};
|
|
|
|
layout(std140) uniform SpotLightData { // ubo:5
|
|
|
|
LightData spot_lights[MAX_LIGHT_DATA_STRUCTS];
|
|
};
|
|
|
|
uniform highp sampler2DShadow shadow_atlas; // texunit:-5
|
|
|
|
struct ReflectionData {
|
|
mediump vec4 box_extents;
|
|
mediump vec4 box_offset;
|
|
mediump vec4 params; // intensity, 0, interior , boxproject
|
|
mediump vec4 ambient; // ambient color, energy
|
|
mediump vec4 atlas_clamp;
|
|
highp mat4 local_matrix; // up to here for spot and omni, rest is for directional
|
|
// notes: for ambientblend, use distance to edge to blend between already existing global environment
|
|
};
|
|
|
|
layout(std140) uniform ReflectionProbeData { //ubo:6
|
|
|
|
ReflectionData reflections[MAX_REFLECTION_DATA_STRUCTS];
|
|
};
|
|
uniform mediump sampler2D reflection_atlas; // texunit:-3
|
|
|
|
#ifdef USE_FORWARD_LIGHTING
|
|
|
|
uniform int omni_light_indices[MAX_FORWARD_LIGHTS];
|
|
uniform int omni_light_count;
|
|
|
|
uniform int spot_light_indices[MAX_FORWARD_LIGHTS];
|
|
uniform int spot_light_count;
|
|
|
|
uniform int reflection_indices[MAX_FORWARD_LIGHTS];
|
|
uniform int reflection_count;
|
|
|
|
#endif
|
|
|
|
#if defined(SCREEN_TEXTURE_USED)
|
|
|
|
uniform highp sampler2D screen_texture; // texunit:-7
|
|
|
|
#endif
|
|
|
|
#ifdef USE_MULTIPLE_RENDER_TARGETS
|
|
|
|
layout(location = 0) out vec4 diffuse_buffer;
|
|
layout(location = 1) out vec4 specular_buffer;
|
|
layout(location = 2) out vec4 normal_mr_buffer;
|
|
#if defined(ENABLE_SSS)
|
|
layout(location = 3) out float sss_buffer;
|
|
#endif
|
|
|
|
#else
|
|
|
|
layout(location = 0) out vec4 frag_color;
|
|
|
|
#endif
|
|
|
|
in highp vec4 position_interp;
|
|
uniform highp sampler2D depth_buffer; // texunit:-8
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
|
|
float contact_shadow_compute(vec3 pos, vec3 dir, float max_distance) {
|
|
if (abs(dir.z) > 0.99)
|
|
return 1.0;
|
|
|
|
vec3 endpoint = pos + dir * max_distance;
|
|
vec4 source = position_interp;
|
|
vec4 dest = projection_matrix * vec4(endpoint, 1.0);
|
|
|
|
vec2 from_screen = (source.xy / source.w) * 0.5 + 0.5;
|
|
vec2 to_screen = (dest.xy / dest.w) * 0.5 + 0.5;
|
|
|
|
vec2 screen_rel = to_screen - from_screen;
|
|
|
|
if (length(screen_rel) < 0.00001)
|
|
return 1.0; // too small, don't do anything
|
|
|
|
/*
|
|
float pixel_size; // approximate pixel size
|
|
|
|
if (screen_rel.x > screen_rel.y) {
|
|
|
|
pixel_size = abs((pos.x - endpoint.x) / (screen_rel.x / screen_pixel_size.x));
|
|
} else {
|
|
pixel_size = abs((pos.y - endpoint.y) / (screen_rel.y / screen_pixel_size.y));
|
|
}
|
|
*/
|
|
vec4 bias = projection_matrix * vec4(pos + vec3(0.0, 0.0, max_distance * 0.5), 1.0);
|
|
|
|
vec2 pixel_incr = normalize(screen_rel) * screen_pixel_size;
|
|
|
|
float steps = length(screen_rel) / length(pixel_incr);
|
|
steps = min(2000.0, steps); // put a limit to avoid freezing in some strange situation
|
|
//steps = 10.0;
|
|
|
|
vec4 incr = (dest - source) / steps;
|
|
float ratio = 0.0;
|
|
float ratio_incr = 1.0 / steps;
|
|
|
|
while (steps > 0.0) {
|
|
source += incr * 2.0;
|
|
bias += incr * 2.0;
|
|
|
|
vec3 uv_depth = (source.xyz / source.w) * 0.5 + 0.5;
|
|
if (uv_depth.x > 0.0 && uv_depth.x < 1.0 && uv_depth.y > 0.0 && uv_depth.y < 1.0) {
|
|
float depth = texture(depth_buffer, uv_depth.xy).r;
|
|
|
|
if (depth < uv_depth.z) {
|
|
if (depth > (bias.z / bias.w) * 0.5 + 0.5) {
|
|
return min(pow(ratio, 4.0), 1.0);
|
|
} else {
|
|
return 1.0;
|
|
}
|
|
}
|
|
|
|
ratio += ratio_incr;
|
|
steps -= 1.0;
|
|
} else {
|
|
return 1.0;
|
|
}
|
|
}
|
|
|
|
return 1.0;
|
|
}
|
|
|
|
#endif
|
|
|
|
// This returns the G_GGX function divided by 2 cos_theta_m, where in practice cos_theta_m is either N.L or N.V.
|
|
// We're dividing this factor off because the overall term we'll end up looks like
|
|
// (see, for example, the first unnumbered equation in B. Burley, "Physically Based Shading at Disney", SIGGRAPH 2012):
|
|
//
|
|
// F(L.V) D(N.H) G(N.L) G(N.V) / (4 N.L N.V)
|
|
//
|
|
// We're basically regouping this as
|
|
//
|
|
// F(L.V) D(N.H) [G(N.L)/(2 N.L)] [G(N.V) / (2 N.V)]
|
|
//
|
|
// and thus, this function implements the [G(N.m)/(2 N.m)] part with m = L or V.
|
|
//
|
|
// The contents of the D and G (G1) functions (GGX) are taken from
|
|
// E. Heitz, "Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs", J. Comp. Graph. Tech. 3 (2) (2014).
|
|
// Eqns 71-72 and 85-86 (see also Eqns 43 and 80).
|
|
|
|
float G_GGX_2cos(float cos_theta_m, float alpha) {
|
|
// Schlick's approximation
|
|
// C. Schlick, "An Inexpensive BRDF Model for Physically-based Rendering", Computer Graphics Forum. 13 (3): 233 (1994)
|
|
// Eq. (19), although see Heitz (2014) the about the problems with his derivation.
|
|
// It nevertheless approximates GGX well with k = alpha/2.
|
|
float k = 0.5 * alpha;
|
|
return 0.5 / (cos_theta_m * (1.0 - k) + k);
|
|
|
|
// float cos2 = cos_theta_m * cos_theta_m;
|
|
// float sin2 = (1.0 - cos2);
|
|
// return 1.0 / (cos_theta_m + sqrt(cos2 + alpha * alpha * sin2));
|
|
}
|
|
|
|
float D_GGX(float cos_theta_m, float alpha) {
|
|
float alpha2 = alpha * alpha;
|
|
float d = 1.0 + (alpha2 - 1.0) * cos_theta_m * cos_theta_m;
|
|
return alpha2 / (M_PI * d * d);
|
|
}
|
|
|
|
float G_GGX_anisotropic_2cos(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) {
|
|
float cos2 = cos_theta_m * cos_theta_m;
|
|
float sin2 = (1.0 - cos2);
|
|
float s_x = alpha_x * cos_phi;
|
|
float s_y = alpha_y * sin_phi;
|
|
return 1.0 / max(cos_theta_m + sqrt(cos2 + (s_x * s_x + s_y * s_y) * sin2), 0.001);
|
|
}
|
|
|
|
float D_GGX_anisotropic(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) {
|
|
float cos2 = cos_theta_m * cos_theta_m;
|
|
float sin2 = (1.0 - cos2);
|
|
float r_x = cos_phi / alpha_x;
|
|
float r_y = sin_phi / alpha_y;
|
|
float d = cos2 + sin2 * (r_x * r_x + r_y * r_y);
|
|
return 1.0 / max(M_PI * alpha_x * alpha_y * d * d, 0.001);
|
|
}
|
|
|
|
float SchlickFresnel(float u) {
|
|
float m = 1.0 - u;
|
|
float m2 = m * m;
|
|
return m2 * m2 * m; // pow(m,5)
|
|
}
|
|
|
|
float GTR1(float NdotH, float a) {
|
|
if (a >= 1.0)
|
|
return 1.0 / M_PI;
|
|
float a2 = a * a;
|
|
float t = 1.0 + (a2 - 1.0) * NdotH * NdotH;
|
|
return (a2 - 1.0) / (M_PI * log(a2) * t);
|
|
}
|
|
|
|
vec3 F0(float metallic, float specular, vec3 albedo) {
|
|
float dielectric = 0.16 * specular * specular;
|
|
// use albedo * metallic as colored specular reflectance at 0 angle for metallic materials;
|
|
// see https://google.github.io/filament/Filament.md.html
|
|
return mix(vec3(dielectric), albedo, vec3(metallic));
|
|
}
|
|
|
|
void light_compute(vec3 N, vec3 L, vec3 V, vec3 B, vec3 T, vec3 light_color, vec3 attenuation, vec3 diffuse_color, vec3 transmission, float specular_blob_intensity, float roughness, float metallic, float specular, float rim, float rim_tint, float clearcoat, float clearcoat_gloss, float anisotropy, inout vec3 diffuse_light, inout vec3 specular_light, inout float alpha) {
|
|
#if defined(USE_LIGHT_SHADER_CODE)
|
|
// light is written by the light shader
|
|
|
|
vec3 normal = N;
|
|
vec3 albedo = diffuse_color;
|
|
vec3 light = L;
|
|
vec3 view = V;
|
|
|
|
/* clang-format off */
|
|
|
|
LIGHT_SHADER_CODE
|
|
|
|
/* clang-format on */
|
|
|
|
#else
|
|
float NdotL = dot(N, L);
|
|
float cNdotL = max(NdotL, 0.0); // clamped NdotL
|
|
float NdotV = dot(N, V);
|
|
float cNdotV = max(NdotV, 0.0);
|
|
|
|
/* Make a default specular mode SPECULAR_SCHLICK_GGX. */
|
|
#if !defined(SPECULAR_DISABLED) && !defined(SPECULAR_SCHLICK_GGX) && !defined(SPECULAR_BLINN) && !defined(SPECULAR_PHONG) && !defined(SPECULAR_TOON)
|
|
#define SPECULAR_SCHLICK_GGX
|
|
#endif
|
|
|
|
#if defined(DIFFUSE_BURLEY) || defined(SPECULAR_BLINN) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_USE_CLEARCOAT)
|
|
vec3 H = normalize(V + L);
|
|
#endif
|
|
|
|
#if defined(SPECULAR_BLINN) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_USE_CLEARCOAT)
|
|
float cNdotH = max(dot(N, H), 0.0);
|
|
#endif
|
|
|
|
#if defined(DIFFUSE_BURLEY) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_USE_CLEARCOAT)
|
|
float cLdotH = max(dot(L, H), 0.0);
|
|
#endif
|
|
|
|
if (metallic < 1.0) {
|
|
#if defined(DIFFUSE_OREN_NAYAR)
|
|
vec3 diffuse_brdf_NL;
|
|
#else
|
|
float diffuse_brdf_NL; // BRDF times N.L for calculating diffuse radiance
|
|
#endif
|
|
|
|
#if defined(DIFFUSE_LAMBERT_WRAP)
|
|
// energy conserving lambert wrap shader
|
|
diffuse_brdf_NL = max(0.0, (NdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness)));
|
|
|
|
#elif defined(DIFFUSE_OREN_NAYAR)
|
|
|
|
{
|
|
// see http://mimosa-pudica.net/improved-oren-nayar.html
|
|
float LdotV = dot(L, V);
|
|
|
|
float s = LdotV - NdotL * NdotV;
|
|
float t = mix(1.0, max(NdotL, NdotV), step(0.0, s));
|
|
|
|
float sigma2 = roughness * roughness; // TODO: this needs checking
|
|
vec3 A = 1.0 + sigma2 * (-0.5 / (sigma2 + 0.33) + 0.17 * diffuse_color / (sigma2 + 0.13));
|
|
float B = 0.45 * sigma2 / (sigma2 + 0.09);
|
|
|
|
diffuse_brdf_NL = cNdotL * (A + vec3(B) * s / t) * (1.0 / M_PI);
|
|
}
|
|
|
|
#elif defined(DIFFUSE_TOON)
|
|
|
|
diffuse_brdf_NL = smoothstep(-roughness, max(roughness, 0.01), NdotL);
|
|
|
|
#elif defined(DIFFUSE_BURLEY)
|
|
|
|
{
|
|
float FD90_minus_1 = 2.0 * cLdotH * cLdotH * roughness - 0.5;
|
|
float FdV = 1.0 + FD90_minus_1 * SchlickFresnel(cNdotV);
|
|
float FdL = 1.0 + FD90_minus_1 * SchlickFresnel(cNdotL);
|
|
diffuse_brdf_NL = (1.0 / M_PI) * FdV * FdL * cNdotL;
|
|
/*
|
|
float energyBias = mix(roughness, 0.0, 0.5);
|
|
float energyFactor = mix(roughness, 1.0, 1.0 / 1.51);
|
|
float fd90 = energyBias + 2.0 * VoH * VoH * roughness;
|
|
float f0 = 1.0;
|
|
float lightScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotL, 5.0);
|
|
float viewScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotV, 5.0);
|
|
|
|
diffuse_brdf_NL = lightScatter * viewScatter * energyFactor;
|
|
*/
|
|
}
|
|
#else
|
|
// lambert
|
|
diffuse_brdf_NL = cNdotL * (1.0 / M_PI);
|
|
#endif
|
|
|
|
diffuse_light += light_color * diffuse_color * diffuse_brdf_NL * attenuation;
|
|
|
|
#if defined(TRANSMISSION_USED)
|
|
diffuse_light += light_color * diffuse_color * (vec3(1.0 / M_PI) - diffuse_brdf_NL) * transmission * attenuation;
|
|
#endif
|
|
|
|
#if defined(LIGHT_USE_RIM)
|
|
float rim_light = pow(max(0.0, 1.0 - cNdotV), max(0.0, (1.0 - roughness) * 16.0));
|
|
diffuse_light += rim_light * rim * mix(vec3(1.0), diffuse_color, rim_tint) * light_color;
|
|
#endif
|
|
}
|
|
|
|
if (roughness > 0.0) { // FIXME: roughness == 0 should not disable specular light entirely
|
|
|
|
// D
|
|
|
|
#if defined(SPECULAR_BLINN)
|
|
|
|
//normalized blinn
|
|
float shininess = exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25;
|
|
float blinn = pow(cNdotH, shininess);
|
|
blinn *= (shininess + 2.0) * (1.0 / (8.0 * M_PI)); // Normalized NDF and Geometric term
|
|
float intensity = blinn;
|
|
|
|
specular_light += light_color * intensity * specular_blob_intensity * attenuation * diffuse_color * specular;
|
|
|
|
#elif defined(SPECULAR_PHONG)
|
|
|
|
vec3 R = normalize(-reflect(L, N));
|
|
float cRdotV = max(0.0, dot(R, V));
|
|
float shininess = exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25;
|
|
float phong = pow(cRdotV, shininess);
|
|
phong *= (shininess + 1.0) * (1.0 / (8.0 * M_PI)); // Normalized NDF and Geometric term
|
|
float intensity = phong;
|
|
|
|
specular_light += light_color * intensity * specular_blob_intensity * attenuation * diffuse_color * specular;
|
|
|
|
#elif defined(SPECULAR_TOON)
|
|
|
|
vec3 R = normalize(-reflect(L, N));
|
|
float RdotV = dot(R, V);
|
|
float mid = 1.0 - roughness;
|
|
mid *= mid;
|
|
float intensity = smoothstep(mid - roughness * 0.5, mid + roughness * 0.5, RdotV) * mid;
|
|
diffuse_light += light_color * intensity * specular_blob_intensity * attenuation; // write to diffuse_light, as in toon shading you generally want no reflection
|
|
|
|
#elif defined(SPECULAR_DISABLED)
|
|
// none..
|
|
|
|
#elif defined(SPECULAR_SCHLICK_GGX)
|
|
// shlick+ggx as default
|
|
|
|
#if defined(LIGHT_USE_ANISOTROPY)
|
|
|
|
float alpha_ggx = roughness * roughness;
|
|
float aspect = sqrt(1.0 - anisotropy * 0.9);
|
|
float ax = alpha_ggx / aspect;
|
|
float ay = alpha_ggx * aspect;
|
|
float XdotH = dot(T, H);
|
|
float YdotH = dot(B, H);
|
|
float D = D_GGX_anisotropic(cNdotH, ax, ay, XdotH, YdotH);
|
|
float G = G_GGX_anisotropic_2cos(cNdotL, ax, ay, XdotH, YdotH) * G_GGX_anisotropic_2cos(cNdotV, ax, ay, XdotH, YdotH);
|
|
|
|
#else
|
|
float alpha_ggx = roughness * roughness;
|
|
float D = D_GGX(cNdotH, alpha_ggx);
|
|
float G = G_GGX_2cos(cNdotL, alpha_ggx) * G_GGX_2cos(cNdotV, alpha_ggx);
|
|
#endif
|
|
// F
|
|
vec3 f0 = F0(metallic, specular, diffuse_color);
|
|
float cLdotH5 = SchlickFresnel(cLdotH);
|
|
vec3 F = mix(vec3(cLdotH5), vec3(1.0), f0);
|
|
|
|
vec3 specular_brdf_NL = cNdotL * D * F * G;
|
|
|
|
specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation;
|
|
#endif
|
|
|
|
#if defined(LIGHT_USE_CLEARCOAT)
|
|
|
|
#if !defined(SPECULAR_SCHLICK_GGX)
|
|
float cLdotH5 = SchlickFresnel(cLdotH);
|
|
#endif
|
|
float Dr = GTR1(cNdotH, mix(.1, .001, clearcoat_gloss));
|
|
float Fr = mix(.04, 1.0, cLdotH5);
|
|
float Gr = G_GGX_2cos(cNdotL, .25) * G_GGX_2cos(cNdotV, .25);
|
|
|
|
float clearcoat_specular_brdf_NL = 0.25 * clearcoat * Gr * Fr * Dr * cNdotL;
|
|
|
|
specular_light += clearcoat_specular_brdf_NL * light_color * specular_blob_intensity * attenuation;
|
|
#endif
|
|
}
|
|
|
|
#ifdef USE_SHADOW_TO_OPACITY
|
|
alpha = min(alpha, clamp(1.0 - length(attenuation), 0.0, 1.0));
|
|
#endif
|
|
|
|
#endif //defined(USE_LIGHT_SHADER_CODE)
|
|
}
|
|
|
|
float sample_shadow(highp sampler2DShadow shadow, vec2 shadow_pixel_size, vec2 pos, float depth, vec4 clamp_rect) {
|
|
#ifdef SHADOW_MODE_PCF_13
|
|
|
|
float avg = textureProj(shadow, vec4(pos + vec2(shadow_pixel_size.x * 2.0, 0.0), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(-shadow_pixel_size.x * 2.0, 0.0), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(0.0, shadow_pixel_size.y * 2.0), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(0.0, -shadow_pixel_size.y * 2.0), depth, 1.0));
|
|
// Early bail if distant samples are fully shaded (or none are shaded) to improve performance.
|
|
if (avg <= 0.000001) {
|
|
// None shaded at all.
|
|
return 0.0;
|
|
} else if (avg >= 3.999999) {
|
|
// All fully shaded.
|
|
return 1.0;
|
|
}
|
|
|
|
avg += textureProj(shadow, vec4(pos, depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(shadow_pixel_size.x, 0.0), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(-shadow_pixel_size.x, 0.0), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(0.0, shadow_pixel_size.y), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(0.0, -shadow_pixel_size.y), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(shadow_pixel_size.x, shadow_pixel_size.y), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(-shadow_pixel_size.x, shadow_pixel_size.y), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(shadow_pixel_size.x, -shadow_pixel_size.y), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(-shadow_pixel_size.x, -shadow_pixel_size.y), depth, 1.0));
|
|
return avg * (1.0 / 13.0);
|
|
#endif
|
|
|
|
#ifdef SHADOW_MODE_PCF_5
|
|
|
|
float avg = textureProj(shadow, vec4(pos, depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(shadow_pixel_size.x, 0.0), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(-shadow_pixel_size.x, 0.0), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(0.0, shadow_pixel_size.y), depth, 1.0));
|
|
avg += textureProj(shadow, vec4(pos + vec2(0.0, -shadow_pixel_size.y), depth, 1.0));
|
|
return avg * (1.0 / 5.0);
|
|
|
|
#endif
|
|
|
|
#if !defined(SHADOW_MODE_PCF_5) || !defined(SHADOW_MODE_PCF_13)
|
|
|
|
return textureProj(shadow, vec4(pos, depth, 1.0));
|
|
|
|
#endif
|
|
}
|
|
|
|
#ifdef RENDER_DEPTH_DUAL_PARABOLOID
|
|
|
|
in highp float dp_clip;
|
|
|
|
#endif
|
|
|
|
#ifdef USE_PHYSICAL_LIGHT_ATTENUATION
|
|
float get_omni_attenuation(float distance, float inv_range, float decay) {
|
|
float nd = distance * inv_range;
|
|
nd *= nd;
|
|
nd *= nd; // nd^4
|
|
nd = max(1.0 - nd, 0.0);
|
|
nd *= nd; // nd^2
|
|
return nd * pow(max(distance, 0.0001), -decay);
|
|
}
|
|
#endif
|
|
|
|
void light_process_omni(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 binormal, vec3 tangent, vec3 albedo, vec3 transmission, float roughness, float metallic, float specular, float rim, float rim_tint, float clearcoat, float clearcoat_gloss, float anisotropy, float p_blob_intensity, inout vec3 diffuse_light, inout vec3 specular_light, inout float alpha) {
|
|
vec3 light_rel_vec = omni_lights[idx].light_pos_inv_radius.xyz - vertex;
|
|
float light_length = length(light_rel_vec);
|
|
float normalized_distance = light_length * omni_lights[idx].light_pos_inv_radius.w;
|
|
float omni_attenuation;
|
|
if (normalized_distance < 1.0) {
|
|
#ifdef USE_PHYSICAL_LIGHT_ATTENUATION
|
|
omni_attenuation = get_omni_attenuation(light_length, omni_lights[idx].light_pos_inv_radius.w, omni_lights[idx].light_direction_attenuation.w);
|
|
#else
|
|
omni_attenuation = pow(1.0 - normalized_distance, omni_lights[idx].light_direction_attenuation.w);
|
|
#endif
|
|
} else {
|
|
omni_attenuation = 0.0;
|
|
}
|
|
vec3 light_attenuation = vec3(omni_attenuation);
|
|
|
|
#if !defined(SHADOWS_DISABLED)
|
|
#ifdef USE_SHADOW
|
|
if (omni_lights[idx].light_params.w > 0.5) {
|
|
// there is a shadowmap
|
|
|
|
highp vec3 splane = (omni_lights[idx].shadow_matrix * vec4(vertex, 1.0)).xyz;
|
|
float shadow_len = length(splane);
|
|
splane = normalize(splane);
|
|
vec4 clamp_rect = omni_lights[idx].light_clamp;
|
|
|
|
if (splane.z >= 0.0) {
|
|
splane.z += 1.0;
|
|
|
|
clamp_rect.y += clamp_rect.w;
|
|
|
|
} else {
|
|
splane.z = 1.0 - splane.z;
|
|
|
|
/*
|
|
if (clamp_rect.z < clamp_rect.w) {
|
|
clamp_rect.x += clamp_rect.z;
|
|
} else {
|
|
clamp_rect.y += clamp_rect.w;
|
|
}
|
|
*/
|
|
}
|
|
|
|
splane.xy /= splane.z;
|
|
splane.xy = splane.xy * 0.5 + 0.5;
|
|
splane.z = shadow_len * omni_lights[idx].light_pos_inv_radius.w;
|
|
|
|
splane.xy = clamp_rect.xy + splane.xy * clamp_rect.zw;
|
|
float shadow = sample_shadow(shadow_atlas, shadow_atlas_pixel_size, splane.xy, splane.z, clamp_rect);
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
|
|
if (shadow > 0.01 && omni_lights[idx].shadow_color_contact.a > 0.0) {
|
|
float contact_shadow = contact_shadow_compute(vertex, normalize(light_rel_vec), min(light_length, omni_lights[idx].shadow_color_contact.a));
|
|
shadow = min(shadow, contact_shadow);
|
|
}
|
|
#endif
|
|
light_attenuation *= mix(omni_lights[idx].shadow_color_contact.rgb, vec3(1.0), shadow);
|
|
}
|
|
#endif //USE_SHADOW
|
|
#endif //SHADOWS_DISABLED
|
|
light_compute(normal, normalize(light_rel_vec), eye_vec, binormal, tangent, omni_lights[idx].light_color_energy.rgb, light_attenuation, albedo, transmission, omni_lights[idx].light_params.z * p_blob_intensity, roughness, metallic, specular, rim * omni_attenuation, rim_tint, clearcoat, clearcoat_gloss, anisotropy, diffuse_light, specular_light, alpha);
|
|
}
|
|
|
|
void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 binormal, vec3 tangent, vec3 albedo, vec3 transmission, float roughness, float metallic, float specular, float rim, float rim_tint, float clearcoat, float clearcoat_gloss, float anisotropy, float p_blob_intensity, inout vec3 diffuse_light, inout vec3 specular_light, inout float alpha) {
|
|
vec3 light_rel_vec = spot_lights[idx].light_pos_inv_radius.xyz - vertex;
|
|
float light_length = length(light_rel_vec);
|
|
float normalized_distance = light_length * spot_lights[idx].light_pos_inv_radius.w;
|
|
float spot_attenuation;
|
|
if (normalized_distance < 1.0) {
|
|
#ifdef USE_PHYSICAL_LIGHT_ATTENUATION
|
|
spot_attenuation = get_omni_attenuation(light_length, spot_lights[idx].light_pos_inv_radius.w, spot_lights[idx].light_direction_attenuation.w);
|
|
#else
|
|
spot_attenuation = pow(1.0 - normalized_distance, spot_lights[idx].light_direction_attenuation.w);
|
|
#endif
|
|
} else {
|
|
spot_attenuation = 0.0;
|
|
}
|
|
vec3 spot_dir = spot_lights[idx].light_direction_attenuation.xyz;
|
|
float spot_cutoff = spot_lights[idx].light_params.y;
|
|
float scos = max(dot(-normalize(light_rel_vec), spot_dir), spot_cutoff);
|
|
float spot_rim = max(0.0001, (1.0 - scos) / (1.0 - spot_cutoff));
|
|
spot_attenuation *= 1.0 - pow(spot_rim, spot_lights[idx].light_params.x);
|
|
vec3 light_attenuation = vec3(spot_attenuation);
|
|
|
|
#if !defined(SHADOWS_DISABLED)
|
|
#ifdef USE_SHADOW
|
|
if (spot_lights[idx].light_params.w > 0.5) {
|
|
//there is a shadowmap
|
|
highp vec4 splane = (spot_lights[idx].shadow_matrix * vec4(vertex, 1.0));
|
|
splane.xyz /= splane.w;
|
|
|
|
float shadow = sample_shadow(shadow_atlas, shadow_atlas_pixel_size, splane.xy, splane.z, spot_lights[idx].light_clamp);
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
if (shadow > 0.01 && spot_lights[idx].shadow_color_contact.a > 0.0) {
|
|
float contact_shadow = contact_shadow_compute(vertex, normalize(light_rel_vec), min(light_length, spot_lights[idx].shadow_color_contact.a));
|
|
shadow = min(shadow, contact_shadow);
|
|
}
|
|
#endif
|
|
light_attenuation *= mix(spot_lights[idx].shadow_color_contact.rgb, vec3(1.0), shadow);
|
|
}
|
|
#endif //USE_SHADOW
|
|
#endif //SHADOWS_DISABLED
|
|
|
|
light_compute(normal, normalize(light_rel_vec), eye_vec, binormal, tangent, spot_lights[idx].light_color_energy.rgb, light_attenuation, albedo, transmission, spot_lights[idx].light_params.z * p_blob_intensity, roughness, metallic, specular, rim * spot_attenuation, rim_tint, clearcoat, clearcoat_gloss, anisotropy, diffuse_light, specular_light, alpha);
|
|
}
|
|
|
|
void reflection_process(int idx, vec3 vertex, vec3 normal, vec3 binormal, vec3 tangent, float roughness, float anisotropy, vec3 ambient, vec3 skybox, inout highp vec4 reflection_accum, inout highp vec4 ambient_accum) {
|
|
vec3 ref_vec = normalize(reflect(vertex, normal));
|
|
vec3 local_pos = (reflections[idx].local_matrix * vec4(vertex, 1.0)).xyz;
|
|
vec3 box_extents = reflections[idx].box_extents.xyz;
|
|
|
|
if (any(greaterThan(abs(local_pos), box_extents))) { //out of the reflection box
|
|
return;
|
|
}
|
|
|
|
vec3 inner_pos = abs(local_pos / box_extents);
|
|
float blend = max(inner_pos.x, max(inner_pos.y, inner_pos.z));
|
|
//make blend more rounded
|
|
blend = mix(length(inner_pos), blend, blend);
|
|
blend *= blend;
|
|
blend = max(0.0, 1.0 - blend);
|
|
|
|
if (reflections[idx].params.x > 0.0) { // compute reflection
|
|
|
|
vec3 local_ref_vec = (reflections[idx].local_matrix * vec4(ref_vec, 0.0)).xyz;
|
|
|
|
if (reflections[idx].params.w > 0.5) { //box project
|
|
|
|
vec3 nrdir = normalize(local_ref_vec);
|
|
vec3 rbmax = (box_extents - local_pos) / nrdir;
|
|
vec3 rbmin = (-box_extents - local_pos) / nrdir;
|
|
|
|
vec3 rbminmax = mix(rbmin, rbmax, greaterThan(nrdir, vec3(0.0, 0.0, 0.0)));
|
|
|
|
float fa = min(min(rbminmax.x, rbminmax.y), rbminmax.z);
|
|
vec3 posonbox = local_pos + nrdir * fa;
|
|
local_ref_vec = posonbox - reflections[idx].box_offset.xyz;
|
|
}
|
|
|
|
vec4 clamp_rect = reflections[idx].atlas_clamp;
|
|
vec3 norm = normalize(local_ref_vec);
|
|
norm.xy /= 1.0 + abs(norm.z);
|
|
norm.xy = norm.xy * vec2(0.5, 0.25) + vec2(0.5, 0.25);
|
|
if (norm.z > 0.0) {
|
|
norm.y = 0.5 - norm.y + 0.5;
|
|
}
|
|
|
|
vec2 atlas_uv = norm.xy * clamp_rect.zw + clamp_rect.xy;
|
|
atlas_uv = clamp(atlas_uv, clamp_rect.xy, clamp_rect.xy + clamp_rect.zw);
|
|
|
|
highp vec4 reflection;
|
|
reflection.rgb = textureLod(reflection_atlas, atlas_uv, roughness * 5.0).rgb;
|
|
|
|
if (reflections[idx].params.z < 0.5) {
|
|
reflection.rgb = mix(skybox, reflection.rgb, blend);
|
|
}
|
|
reflection.rgb *= reflections[idx].params.x;
|
|
reflection.a = blend;
|
|
reflection.rgb *= reflection.a;
|
|
|
|
reflection_accum += reflection;
|
|
}
|
|
#if !defined(USE_LIGHTMAP) && !defined(USE_LIGHTMAP_CAPTURE)
|
|
if (reflections[idx].ambient.a > 0.0) { //compute ambient using skybox
|
|
|
|
vec3 local_amb_vec = (reflections[idx].local_matrix * vec4(normal, 0.0)).xyz;
|
|
|
|
vec3 splane = normalize(local_amb_vec);
|
|
vec4 clamp_rect = reflections[idx].atlas_clamp;
|
|
|
|
splane.z *= -1.0;
|
|
if (splane.z >= 0.0) {
|
|
splane.z += 1.0;
|
|
clamp_rect.y += clamp_rect.w;
|
|
} else {
|
|
splane.z = 1.0 - splane.z;
|
|
splane.y = -splane.y;
|
|
}
|
|
|
|
splane.xy /= splane.z;
|
|
splane.xy = splane.xy * 0.5 + 0.5;
|
|
|
|
splane.xy = splane.xy * clamp_rect.zw + clamp_rect.xy;
|
|
splane.xy = clamp(splane.xy, clamp_rect.xy, clamp_rect.xy + clamp_rect.zw);
|
|
|
|
highp vec4 ambient_out;
|
|
ambient_out.a = blend;
|
|
ambient_out.rgb = textureLod(reflection_atlas, splane.xy, 5.0).rgb;
|
|
ambient_out.rgb = mix(reflections[idx].ambient.rgb, ambient_out.rgb, reflections[idx].ambient.a);
|
|
if (reflections[idx].params.z < 0.5) {
|
|
ambient_out.rgb = mix(ambient, ambient_out.rgb, blend);
|
|
}
|
|
|
|
ambient_out.rgb *= ambient_out.a;
|
|
ambient_accum += ambient_out;
|
|
} else {
|
|
highp vec4 ambient_out;
|
|
ambient_out.a = blend;
|
|
ambient_out.rgb = reflections[idx].ambient.rgb;
|
|
if (reflections[idx].params.z < 0.5) {
|
|
ambient_out.rgb = mix(ambient, ambient_out.rgb, blend);
|
|
}
|
|
ambient_out.rgb *= ambient_out.a;
|
|
ambient_accum += ambient_out;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef USE_LIGHTMAP
|
|
#ifdef USE_LIGHTMAP_LAYERED
|
|
uniform mediump sampler2DArray lightmap; //texunit:-9
|
|
uniform int lightmap_layer;
|
|
#else
|
|
uniform mediump sampler2D lightmap; //texunit:-9
|
|
#endif
|
|
|
|
uniform mediump float lightmap_energy;
|
|
|
|
#ifdef USE_LIGHTMAP_FILTER_BICUBIC
|
|
uniform vec2 lightmap_texture_size;
|
|
|
|
// w0, w1, w2, and w3 are the four cubic B-spline basis functions
|
|
float w0(float a) {
|
|
return (1.0 / 6.0) * (a * (a * (-a + 3.0) - 3.0) + 1.0);
|
|
}
|
|
|
|
float w1(float a) {
|
|
return (1.0 / 6.0) * (a * a * (3.0 * a - 6.0) + 4.0);
|
|
}
|
|
|
|
float w2(float a) {
|
|
return (1.0 / 6.0) * (a * (a * (-3.0 * a + 3.0) + 3.0) + 1.0);
|
|
}
|
|
|
|
float w3(float a) {
|
|
return (1.0 / 6.0) * (a * a * a);
|
|
}
|
|
|
|
// g0 and g1 are the two amplitude functions
|
|
float g0(float a) {
|
|
return w0(a) + w1(a);
|
|
}
|
|
|
|
float g1(float a) {
|
|
return w2(a) + w3(a);
|
|
}
|
|
|
|
// h0 and h1 are the two offset functions
|
|
float h0(float a) {
|
|
return -1.0 + w1(a) / (w0(a) + w1(a));
|
|
}
|
|
|
|
float h1(float a) {
|
|
return 1.0 + w3(a) / (w2(a) + w3(a));
|
|
}
|
|
|
|
vec4 texture_bicubic(sampler2D tex, vec2 uv) {
|
|
vec2 texel_size = vec2(1.0) / lightmap_texture_size;
|
|
|
|
uv = uv * lightmap_texture_size + vec2(0.5);
|
|
|
|
vec2 iuv = floor(uv);
|
|
vec2 fuv = fract(uv);
|
|
|
|
float g0x = g0(fuv.x);
|
|
float g1x = g1(fuv.x);
|
|
float h0x = h0(fuv.x);
|
|
float h1x = h1(fuv.x);
|
|
float h0y = h0(fuv.y);
|
|
float h1y = h1(fuv.y);
|
|
|
|
vec2 p0 = (vec2(iuv.x + h0x, iuv.y + h0y) - vec2(0.5)) * texel_size;
|
|
vec2 p1 = (vec2(iuv.x + h1x, iuv.y + h0y) - vec2(0.5)) * texel_size;
|
|
vec2 p2 = (vec2(iuv.x + h0x, iuv.y + h1y) - vec2(0.5)) * texel_size;
|
|
vec2 p3 = (vec2(iuv.x + h1x, iuv.y + h1y) - vec2(0.5)) * texel_size;
|
|
|
|
return (g0(fuv.y) * (g0x * texture(tex, p0) + g1x * texture(tex, p1))) +
|
|
(g1(fuv.y) * (g0x * texture(tex, p2) + g1x * texture(tex, p3)));
|
|
}
|
|
|
|
vec4 textureArray_bicubic(sampler2DArray tex, vec3 uv) {
|
|
vec2 texel_size = vec2(1.0) / lightmap_texture_size;
|
|
|
|
uv.xy = uv.xy * lightmap_texture_size + vec2(0.5);
|
|
|
|
vec2 iuv = floor(uv.xy);
|
|
vec2 fuv = fract(uv.xy);
|
|
|
|
float g0x = g0(fuv.x);
|
|
float g1x = g1(fuv.x);
|
|
float h0x = h0(fuv.x);
|
|
float h1x = h1(fuv.x);
|
|
float h0y = h0(fuv.y);
|
|
float h1y = h1(fuv.y);
|
|
|
|
vec2 p0 = (vec2(iuv.x + h0x, iuv.y + h0y) - vec2(0.5)) * texel_size;
|
|
vec2 p1 = (vec2(iuv.x + h1x, iuv.y + h0y) - vec2(0.5)) * texel_size;
|
|
vec2 p2 = (vec2(iuv.x + h0x, iuv.y + h1y) - vec2(0.5)) * texel_size;
|
|
vec2 p3 = (vec2(iuv.x + h1x, iuv.y + h1y) - vec2(0.5)) * texel_size;
|
|
|
|
return (g0(fuv.y) * (g0x * texture(tex, vec3(p0, uv.z)) + g1x * texture(tex, vec3(p1, uv.z)))) +
|
|
(g1(fuv.y) * (g0x * texture(tex, vec3(p2, uv.z)) + g1x * texture(tex, vec3(p3, uv.z))));
|
|
}
|
|
|
|
#define LIGHTMAP_TEXTURE_SAMPLE(m_tex, m_uv) texture_bicubic(m_tex, m_uv)
|
|
#define LIGHTMAP_TEXTURE_LAYERED_SAMPLE(m_tex, m_uv) textureArray_bicubic(m_tex, m_uv)
|
|
|
|
#else //!USE_LIGHTMAP_FILTER_BICUBIC
|
|
#define LIGHTMAP_TEXTURE_SAMPLE(m_tex, m_uv) texture(m_tex, m_uv)
|
|
#define LIGHTMAP_TEXTURE_LAYERED_SAMPLE(m_tex, m_uv) texture(m_tex, m_uv)
|
|
|
|
#endif //USE_LIGHTMAP_FILTER_BICUBIC
|
|
#endif
|
|
|
|
#ifdef USE_LIGHTMAP_CAPTURE
|
|
uniform mediump vec4[12] lightmap_captures;
|
|
#endif
|
|
|
|
#ifdef USE_GI_PROBES
|
|
|
|
uniform mediump sampler3D gi_probe1; //texunit:-9
|
|
uniform highp mat4 gi_probe_xform1;
|
|
uniform highp vec3 gi_probe_bounds1;
|
|
uniform highp vec3 gi_probe_cell_size1;
|
|
uniform highp float gi_probe_multiplier1;
|
|
uniform highp float gi_probe_bias1;
|
|
uniform highp float gi_probe_normal_bias1;
|
|
uniform bool gi_probe_blend_ambient1;
|
|
|
|
uniform mediump sampler3D gi_probe2; //texunit:-10
|
|
uniform highp mat4 gi_probe_xform2;
|
|
uniform highp vec3 gi_probe_bounds2;
|
|
uniform highp vec3 gi_probe_cell_size2;
|
|
uniform highp float gi_probe_multiplier2;
|
|
uniform highp float gi_probe_bias2;
|
|
uniform highp float gi_probe_normal_bias2;
|
|
uniform bool gi_probe2_enabled;
|
|
uniform bool gi_probe_blend_ambient2;
|
|
|
|
vec3 voxel_cone_trace(mediump sampler3D probe, vec3 cell_size, vec3 pos, vec3 ambient, bool blend_ambient, vec3 direction, float tan_half_angle, float max_distance, float p_bias) {
|
|
float dist = p_bias; //1.0; //dot(direction,mix(vec3(-1.0),vec3(1.0),greaterThan(direction,vec3(0.0))))*2.0;
|
|
float alpha = 0.0;
|
|
vec3 color = vec3(0.0);
|
|
|
|
while (dist < max_distance && alpha < 0.95) {
|
|
float diameter = max(1.0, 2.0 * tan_half_angle * dist);
|
|
vec4 scolor = textureLod(probe, (pos + dist * direction) * cell_size, log2(diameter));
|
|
float a = (1.0 - alpha);
|
|
color += scolor.rgb * a;
|
|
alpha += a * scolor.a;
|
|
dist += diameter * 0.5;
|
|
}
|
|
|
|
if (blend_ambient) {
|
|
color.rgb = mix(ambient, color.rgb, min(1.0, alpha / 0.95));
|
|
}
|
|
|
|
return color;
|
|
}
|
|
|
|
void gi_probe_compute(mediump sampler3D probe, mat4 probe_xform, vec3 bounds, vec3 cell_size, vec3 pos, vec3 ambient, vec3 environment, bool blend_ambient, float multiplier, mat3 normal_mtx, vec3 ref_vec, float roughness, float p_bias, float p_normal_bias, inout vec4 out_spec, inout vec4 out_diff) {
|
|
vec3 probe_pos = (probe_xform * vec4(pos, 1.0)).xyz;
|
|
vec3 ref_pos = (probe_xform * vec4(pos + ref_vec, 1.0)).xyz;
|
|
ref_vec = normalize(ref_pos - probe_pos);
|
|
|
|
probe_pos += (probe_xform * vec4(normal_mtx[2], 0.0)).xyz * p_normal_bias;
|
|
|
|
/* out_diff.rgb = voxel_cone_trace(probe,cell_size,probe_pos,normalize((probe_xform * vec4(ref_vec,0.0)).xyz),0.0 ,100.0);
|
|
out_diff.a = 1.0;
|
|
return;*/
|
|
//out_diff = vec4(textureLod(probe,probe_pos*cell_size,3.0).rgb,1.0);
|
|
//return;
|
|
|
|
//this causes corrupted pixels, i have no idea why..
|
|
if (any(bvec2(any(lessThan(probe_pos, vec3(0.0))), any(greaterThan(probe_pos, bounds))))) {
|
|
return;
|
|
}
|
|
|
|
vec3 blendv = abs(probe_pos / bounds * 2.0 - 1.0);
|
|
float blend = clamp(1.0 - max(blendv.x, max(blendv.y, blendv.z)), 0.0, 1.0);
|
|
//float blend=1.0;
|
|
|
|
float max_distance = length(bounds);
|
|
|
|
//radiance
|
|
#ifdef VCT_QUALITY_HIGH
|
|
|
|
#define MAX_CONE_DIRS 6
|
|
vec3 cone_dirs[MAX_CONE_DIRS] = vec3[](
|
|
vec3(0.0, 0.0, 1.0),
|
|
vec3(0.866025, 0.0, 0.5),
|
|
vec3(0.267617, 0.823639, 0.5),
|
|
vec3(-0.700629, 0.509037, 0.5),
|
|
vec3(-0.700629, -0.509037, 0.5),
|
|
vec3(0.267617, -0.823639, 0.5));
|
|
|
|
float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.15, 0.15, 0.15, 0.15, 0.15);
|
|
float cone_angle_tan = 0.577;
|
|
float min_ref_tan = 0.0;
|
|
#else
|
|
|
|
#define MAX_CONE_DIRS 4
|
|
|
|
vec3 cone_dirs[MAX_CONE_DIRS] = vec3[](
|
|
vec3(0.707107, 0.0, 0.707107),
|
|
vec3(0.0, 0.707107, 0.707107),
|
|
vec3(-0.707107, 0.0, 0.707107),
|
|
vec3(0.0, -0.707107, 0.707107));
|
|
|
|
float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.25, 0.25, 0.25);
|
|
float cone_angle_tan = 0.98269;
|
|
max_distance *= 0.5;
|
|
float min_ref_tan = 0.2;
|
|
|
|
#endif
|
|
vec3 light = vec3(0.0);
|
|
for (int i = 0; i < MAX_CONE_DIRS; i++) {
|
|
vec3 dir = normalize((probe_xform * vec4(pos + normal_mtx * cone_dirs[i], 1.0)).xyz - probe_pos);
|
|
light += cone_weights[i] * voxel_cone_trace(probe, cell_size, probe_pos, ambient, blend_ambient, dir, cone_angle_tan, max_distance, p_bias);
|
|
}
|
|
|
|
light *= multiplier;
|
|
|
|
out_diff += vec4(light * blend, blend);
|
|
|
|
//irradiance
|
|
|
|
vec3 irr_light = voxel_cone_trace(probe, cell_size, probe_pos, environment, blend_ambient, ref_vec, max(min_ref_tan, tan(roughness * 0.5 * M_PI * 0.99)), max_distance, p_bias);
|
|
|
|
irr_light *= multiplier;
|
|
//irr_light=vec3(0.0);
|
|
|
|
out_spec += vec4(irr_light * blend, blend);
|
|
}
|
|
|
|
void gi_probes_compute(vec3 pos, vec3 normal, float roughness, inout vec3 out_specular, inout vec3 out_ambient) {
|
|
roughness = roughness * roughness;
|
|
|
|
vec3 ref_vec = normalize(reflect(normalize(pos), normal));
|
|
|
|
//find arbitrary tangent and bitangent, then build a matrix
|
|
vec3 v0 = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(0.0, 1.0, 0.0);
|
|
vec3 tangent = normalize(cross(v0, normal));
|
|
vec3 bitangent = normalize(cross(tangent, normal));
|
|
mat3 normal_mat = mat3(tangent, bitangent, normal);
|
|
|
|
vec4 diff_accum = vec4(0.0);
|
|
vec4 spec_accum = vec4(0.0);
|
|
|
|
vec3 ambient = out_ambient;
|
|
out_ambient = vec3(0.0);
|
|
|
|
vec3 environment = out_specular;
|
|
|
|
out_specular = vec3(0.0);
|
|
|
|
gi_probe_compute(gi_probe1, gi_probe_xform1, gi_probe_bounds1, gi_probe_cell_size1, pos, ambient, environment, gi_probe_blend_ambient1, gi_probe_multiplier1, normal_mat, ref_vec, roughness, gi_probe_bias1, gi_probe_normal_bias1, spec_accum, diff_accum);
|
|
|
|
if (gi_probe2_enabled) {
|
|
gi_probe_compute(gi_probe2, gi_probe_xform2, gi_probe_bounds2, gi_probe_cell_size2, pos, ambient, environment, gi_probe_blend_ambient2, gi_probe_multiplier2, normal_mat, ref_vec, roughness, gi_probe_bias2, gi_probe_normal_bias2, spec_accum, diff_accum);
|
|
}
|
|
|
|
if (diff_accum.a > 0.0) {
|
|
diff_accum.rgb /= diff_accum.a;
|
|
}
|
|
|
|
if (spec_accum.a > 0.0) {
|
|
spec_accum.rgb /= spec_accum.a;
|
|
}
|
|
|
|
out_specular += spec_accum.rgb;
|
|
out_ambient += diff_accum.rgb;
|
|
}
|
|
|
|
#endif
|
|
|
|
void main() {
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#ifdef RENDER_DEPTH_DUAL_PARABOLOID
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if (dp_clip > 0.0)
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discard;
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#endif
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//lay out everything, whathever is unused is optimized away anyway
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highp vec3 vertex = vertex_interp;
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vec3 view = -normalize(vertex_interp);
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vec3 albedo = vec3(1.0);
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vec3 transmission = vec3(0.0);
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float metallic = 0.0;
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float specular = 0.5;
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vec3 emission = vec3(0.0);
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float roughness = 1.0;
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float rim = 0.0;
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float rim_tint = 0.0;
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float clearcoat = 0.0;
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float clearcoat_gloss = 0.0;
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float anisotropy = 0.0;
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vec2 anisotropy_flow = vec2(1.0, 0.0);
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#if defined(ENABLE_AO)
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float ao = 1.0;
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float ao_light_affect = 0.0;
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#endif
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float alpha = 1.0;
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#if defined(ALPHA_SCISSOR_USED)
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float alpha_scissor = 0.5;
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#endif
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY)
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vec3 binormal = normalize(binormal_interp);
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vec3 tangent = normalize(tangent_interp);
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#else
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vec3 binormal = vec3(0.0);
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vec3 tangent = vec3(0.0);
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#endif
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vec3 normal = normalize(normal_interp);
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#if defined(DO_SIDE_CHECK)
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if (!gl_FrontFacing) {
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normal = -normal;
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}
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#endif
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#if defined(ENABLE_UV_INTERP)
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vec2 uv = uv_interp;
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#endif
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#if defined(ENABLE_UV2_INTERP) || defined(USE_LIGHTMAP)
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vec2 uv2 = uv2_interp;
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#endif
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#if defined(ENABLE_COLOR_INTERP)
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vec4 color = color_interp;
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#endif
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#if defined(ENABLE_NORMALMAP)
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vec3 normalmap = vec3(0.5);
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#endif
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float normaldepth = 1.0;
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#if defined(SCREEN_UV_USED)
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vec2 screen_uv = gl_FragCoord.xy * screen_pixel_size;
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#endif
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#if defined(ENABLE_SSS)
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float sss_strength = 0.0;
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#endif
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{
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/* clang-format off */
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FRAGMENT_SHADER_CODE
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/* clang-format on */
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}
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#if !defined(USE_SHADOW_TO_OPACITY)
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#if defined(ALPHA_SCISSOR_USED)
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if (alpha < alpha_scissor) {
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discard;
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}
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#endif // ALPHA_SCISSOR_USED
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#ifdef USE_OPAQUE_PREPASS
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if (alpha < opaque_prepass_threshold) {
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discard;
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}
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#endif // USE_OPAQUE_PREPASS
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#endif // !USE_SHADOW_TO_OPACITY
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#if defined(ENABLE_NORMALMAP)
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normalmap.xy = normalmap.xy * 2.0 - 1.0;
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normalmap.z = sqrt(max(0.0, 1.0 - dot(normalmap.xy, normalmap.xy))); //always ignore Z, as it can be RG packed, Z may be pos/neg, etc.
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normal = normalize(mix(normal, tangent * normalmap.x + binormal * normalmap.y + normal * normalmap.z, normaldepth));
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#endif
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#if defined(LIGHT_USE_ANISOTROPY)
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if (anisotropy > 0.01) {
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//rotation matrix
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mat3 rot = mat3(tangent, binormal, normal);
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//make local to space
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tangent = normalize(rot * vec3(anisotropy_flow.x, anisotropy_flow.y, 0.0));
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binormal = normalize(rot * vec3(-anisotropy_flow.y, anisotropy_flow.x, 0.0));
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}
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#endif
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#ifdef ENABLE_CLIP_ALPHA
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if (albedo.a < 0.99) {
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//used for doublepass and shadowmapping
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discard;
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}
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#endif
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/////////////////////// LIGHTING //////////////////////////////
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//apply energy conservation
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#ifdef USE_VERTEX_LIGHTING
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vec3 specular_light = specular_light_interp.rgb;
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vec3 diffuse_light = diffuse_light_interp.rgb;
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#else
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vec3 specular_light = vec3(0.0, 0.0, 0.0);
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vec3 diffuse_light = vec3(0.0, 0.0, 0.0);
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#endif
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vec3 ambient_light;
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vec3 env_reflection_light = vec3(0.0, 0.0, 0.0);
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vec3 eye_vec = view;
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// IBL precalculations
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float ndotv = clamp(dot(normal, eye_vec), 0.0, 1.0);
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vec3 f0 = F0(metallic, specular, albedo);
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vec3 F = f0 + (max(vec3(1.0 - roughness), f0) - f0) * pow(1.0 - ndotv, 5.0);
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#ifdef USE_RADIANCE_MAP
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#ifdef AMBIENT_LIGHT_DISABLED
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ambient_light = vec3(0.0, 0.0, 0.0);
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#else
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{
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{ //read radiance from dual paraboloid
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vec3 ref_vec = reflect(-eye_vec, normal);
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float horizon = min(1.0 + dot(ref_vec, normal), 1.0);
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ref_vec = normalize((radiance_inverse_xform * vec4(ref_vec, 0.0)).xyz);
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vec3 radiance = textureDualParaboloid(radiance_map, ref_vec, roughness) * bg_energy;
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env_reflection_light = radiance;
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env_reflection_light *= horizon * horizon;
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}
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}
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#ifndef USE_LIGHTMAP
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{
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vec3 norm = normal;
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norm = normalize((radiance_inverse_xform * vec4(norm, 0.0)).xyz);
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norm.xy /= 1.0 + abs(norm.z);
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norm.xy = norm.xy * vec2(0.5, 0.25) + vec2(0.5, 0.25);
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if (norm.z > 0.0) {
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norm.y = 0.5 - norm.y + 0.5;
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}
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vec3 env_ambient = texture(irradiance_map, norm.xy).rgb * bg_energy;
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env_ambient *= 1.0 - F;
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ambient_light = mix(ambient_light_color.rgb, env_ambient, radiance_ambient_contribution);
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}
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#endif
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#endif //AMBIENT_LIGHT_DISABLED
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#else
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#ifdef AMBIENT_LIGHT_DISABLED
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ambient_light = vec3(0.0, 0.0, 0.0);
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#else
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ambient_light = ambient_light_color.rgb;
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env_reflection_light = bg_color.rgb * bg_energy;
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#endif //AMBIENT_LIGHT_DISABLED
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#endif
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ambient_light *= ambient_energy;
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float specular_blob_intensity = 1.0;
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#if defined(SPECULAR_TOON)
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specular_blob_intensity *= specular * 2.0;
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#endif
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#ifdef USE_GI_PROBES
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gi_probes_compute(vertex, normal, roughness, env_reflection_light, ambient_light);
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#endif
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#ifdef USE_LIGHTMAP
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#ifdef USE_LIGHTMAP_LAYERED
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ambient_light = LIGHTMAP_TEXTURE_LAYERED_SAMPLE(lightmap, vec3(uv2, float(lightmap_layer))).rgb * lightmap_energy;
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#else
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ambient_light = LIGHTMAP_TEXTURE_SAMPLE(lightmap, uv2).rgb * lightmap_energy;
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#endif
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#endif
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#ifdef USE_LIGHTMAP_CAPTURE
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{
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vec3 cone_dirs[12] = vec3[](
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vec3(0.0, 0.0, 1.0),
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vec3(0.866025, 0.0, 0.5),
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vec3(0.267617, 0.823639, 0.5),
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vec3(-0.700629, 0.509037, 0.5),
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vec3(-0.700629, -0.509037, 0.5),
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vec3(0.267617, -0.823639, 0.5),
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vec3(0.0, 0.0, -1.0),
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vec3(0.866025, 0.0, -0.5),
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vec3(0.267617, 0.823639, -0.5),
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vec3(-0.700629, 0.509037, -0.5),
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vec3(-0.700629, -0.509037, -0.5),
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vec3(0.267617, -0.823639, -0.5));
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vec3 local_normal = normalize(camera_matrix * vec4(normal, 0.0)).xyz;
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vec4 captured = vec4(0.0);
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float sum = 0.0;
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for (int i = 0; i < 12; i++) {
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float amount = max(0.0, dot(local_normal, cone_dirs[i])); //not correct, but creates a nice wrap around effect
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captured += lightmap_captures[i] * amount;
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sum += amount;
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}
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captured /= sum;
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// Alpha channel is used to indicate if dynamic objects keep the environment lighting
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if (lightmap_captures[0].a > 0.5) {
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ambient_light += captured.rgb;
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} else {
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ambient_light = captured.rgb;
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}
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}
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#endif
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#ifdef USE_FORWARD_LIGHTING
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highp vec4 reflection_accum = vec4(0.0, 0.0, 0.0, 0.0);
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highp vec4 ambient_accum = vec4(0.0, 0.0, 0.0, 0.0);
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for (int i = 0; i < reflection_count; i++) {
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reflection_process(reflection_indices[i], vertex, normal, binormal, tangent, roughness, anisotropy, ambient_light, env_reflection_light, reflection_accum, ambient_accum);
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}
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if (reflection_accum.a > 0.0) {
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specular_light += reflection_accum.rgb / reflection_accum.a;
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} else {
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specular_light += env_reflection_light;
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}
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#if !defined(USE_LIGHTMAP) && !defined(USE_LIGHTMAP_CAPTURE)
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if (ambient_accum.a > 0.0) {
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ambient_light = ambient_accum.rgb / ambient_accum.a;
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}
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#endif
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#endif
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{
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#if defined(DIFFUSE_TOON)
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//simplify for toon, as
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specular_light *= specular * metallic * albedo * 2.0;
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#else
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// scales the specular reflections, needs to be be computed before lighting happens,
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// but after environment, GI, and reflection probes are added
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// Environment brdf approximation (Lazarov 2013)
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// see https://www.unrealengine.com/en-US/blog/physically-based-shading-on-mobile
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const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
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const vec4 c1 = vec4(1.0, 0.0425, 1.04, -0.04);
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vec4 r = roughness * c0 + c1;
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float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y;
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vec2 env = vec2(-1.04, 1.04) * a004 + r.zw;
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specular_light *= env.x * F + env.y;
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#endif
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}
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#if defined(USE_LIGHT_DIRECTIONAL)
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vec3 light_attenuation = vec3(1.0);
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float depth_z = -vertex.z;
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#ifdef LIGHT_DIRECTIONAL_SHADOW
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#if !defined(SHADOWS_DISABLED)
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#ifdef LIGHT_USE_PSSM4
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if (depth_z < shadow_split_offsets.w) {
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#elif defined(LIGHT_USE_PSSM2)
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if (depth_z < shadow_split_offsets.y) {
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#else
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if (depth_z < shadow_split_offsets.x) {
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#endif //LIGHT_USE_PSSM4
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vec3 pssm_coord;
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float pssm_fade = 0.0;
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#ifdef LIGHT_USE_PSSM_BLEND
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float pssm_blend;
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vec3 pssm_coord2;
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bool use_blend = true;
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#endif
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#ifdef LIGHT_USE_PSSM4
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if (depth_z < shadow_split_offsets.y) {
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if (depth_z < shadow_split_offsets.x) {
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highp vec4 splane = (shadow_matrix1 * vec4(vertex, 1.0));
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pssm_coord = splane.xyz / splane.w;
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#if defined(LIGHT_USE_PSSM_BLEND)
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splane = (shadow_matrix2 * vec4(vertex, 1.0));
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pssm_coord2 = splane.xyz / splane.w;
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pssm_blend = smoothstep(0.0, shadow_split_offsets.x, depth_z);
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#endif
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} else {
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highp vec4 splane = (shadow_matrix2 * vec4(vertex, 1.0));
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pssm_coord = splane.xyz / splane.w;
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#if defined(LIGHT_USE_PSSM_BLEND)
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splane = (shadow_matrix3 * vec4(vertex, 1.0));
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pssm_coord2 = splane.xyz / splane.w;
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pssm_blend = smoothstep(shadow_split_offsets.x, shadow_split_offsets.y, depth_z);
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#endif
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}
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} else {
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if (depth_z < shadow_split_offsets.z) {
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highp vec4 splane = (shadow_matrix3 * vec4(vertex, 1.0));
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pssm_coord = splane.xyz / splane.w;
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#if defined(LIGHT_USE_PSSM_BLEND)
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splane = (shadow_matrix4 * vec4(vertex, 1.0));
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pssm_coord2 = splane.xyz / splane.w;
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pssm_blend = smoothstep(shadow_split_offsets.y, shadow_split_offsets.z, depth_z);
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#endif
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} else {
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highp vec4 splane = (shadow_matrix4 * vec4(vertex, 1.0));
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pssm_coord = splane.xyz / splane.w;
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pssm_fade = smoothstep(shadow_split_offsets.z, shadow_split_offsets.w, depth_z);
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#if defined(LIGHT_USE_PSSM_BLEND)
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use_blend = false;
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#endif
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}
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}
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#endif //LIGHT_USE_PSSM4
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#ifdef LIGHT_USE_PSSM2
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if (depth_z < shadow_split_offsets.x) {
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highp vec4 splane = (shadow_matrix1 * vec4(vertex, 1.0));
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pssm_coord = splane.xyz / splane.w;
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#if defined(LIGHT_USE_PSSM_BLEND)
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splane = (shadow_matrix2 * vec4(vertex, 1.0));
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pssm_coord2 = splane.xyz / splane.w;
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pssm_blend = smoothstep(0.0, shadow_split_offsets.x, depth_z);
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#endif
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} else {
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|
highp vec4 splane = (shadow_matrix2 * vec4(vertex, 1.0));
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pssm_coord = splane.xyz / splane.w;
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|
pssm_fade = smoothstep(shadow_split_offsets.x, shadow_split_offsets.y, depth_z);
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#if defined(LIGHT_USE_PSSM_BLEND)
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use_blend = false;
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|
|
|
#endif
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|
}
|
|
|
|
#endif //LIGHT_USE_PSSM2
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|
|
|
#if !defined(LIGHT_USE_PSSM4) && !defined(LIGHT_USE_PSSM2)
|
|
{ //regular orthogonal
|
|
highp vec4 splane = (shadow_matrix1 * vec4(vertex, 1.0));
|
|
pssm_coord = splane.xyz / splane.w;
|
|
}
|
|
#endif
|
|
|
|
//one one sample
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|
|
|
float shadow = sample_shadow(directional_shadow, directional_shadow_pixel_size, pssm_coord.xy, pssm_coord.z, light_clamp);
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|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
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|
|
|
if (use_blend) {
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|
shadow = mix(shadow, sample_shadow(directional_shadow, directional_shadow_pixel_size, pssm_coord2.xy, pssm_coord2.z, light_clamp), pssm_blend);
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_CONTACT_SHADOWS
|
|
if (shadow > 0.01 && shadow_color_contact.a > 0.0) {
|
|
float contact_shadow = contact_shadow_compute(vertex, -light_direction_attenuation.xyz, shadow_color_contact.a);
|
|
shadow = min(shadow, contact_shadow);
|
|
}
|
|
#endif
|
|
light_attenuation = mix(mix(shadow_color_contact.rgb, vec3(1.0), shadow), vec3(1.0), pssm_fade);
|
|
}
|
|
|
|
#endif // !defined(SHADOWS_DISABLED)
|
|
#endif //LIGHT_DIRECTIONAL_SHADOW
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
|
|
diffuse_light *= mix(vec3(1.0), light_attenuation, diffuse_light_interp.a);
|
|
specular_light *= mix(vec3(1.0), light_attenuation, specular_light_interp.a);
|
|
|
|
#else
|
|
light_compute(normal, -light_direction_attenuation.xyz, eye_vec, binormal, tangent, light_color_energy.rgb, light_attenuation, albedo, transmission, light_params.z * specular_blob_intensity, roughness, metallic, specular, rim, rim_tint, clearcoat, clearcoat_gloss, anisotropy, diffuse_light, specular_light, alpha);
|
|
#endif
|
|
|
|
#endif //#USE_LIGHT_DIRECTIONAL
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
|
|
diffuse_light *= albedo;
|
|
#endif
|
|
|
|
#ifdef USE_FORWARD_LIGHTING
|
|
|
|
#ifndef USE_VERTEX_LIGHTING
|
|
|
|
for (int i = 0; i < omni_light_count; i++) {
|
|
light_process_omni(omni_light_indices[i], vertex, eye_vec, normal, binormal, tangent, albedo, transmission, roughness, metallic, specular, rim, rim_tint, clearcoat, clearcoat_gloss, anisotropy, specular_blob_intensity, diffuse_light, specular_light, alpha);
|
|
}
|
|
|
|
for (int i = 0; i < spot_light_count; i++) {
|
|
light_process_spot(spot_light_indices[i], vertex, eye_vec, normal, binormal, tangent, albedo, transmission, roughness, metallic, specular, rim, rim_tint, clearcoat, clearcoat_gloss, anisotropy, specular_blob_intensity, diffuse_light, specular_light, alpha);
|
|
}
|
|
|
|
#endif //USE_VERTEX_LIGHTING
|
|
|
|
#endif
|
|
|
|
#ifdef USE_SHADOW_TO_OPACITY
|
|
alpha = min(alpha, clamp(length(ambient_light), 0.0, 1.0));
|
|
|
|
#if defined(ALPHA_SCISSOR_USED)
|
|
if (alpha < alpha_scissor) {
|
|
discard;
|
|
}
|
|
#endif // ALPHA_SCISSOR_USED
|
|
|
|
#ifdef USE_OPAQUE_PREPASS
|
|
|
|
if (alpha < opaque_prepass_threshold) {
|
|
discard;
|
|
}
|
|
|
|
#endif // USE_OPAQUE_PREPASS
|
|
|
|
#endif // USE_SHADOW_TO_OPACITY
|
|
|
|
#ifdef RENDER_DEPTH
|
|
//nothing happens, so a tree-ssa optimizer will result in no fragment shader :)
|
|
#else
|
|
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specular_light *= reflection_multiplier;
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ambient_light *= albedo; //ambient must be multiplied by albedo at the end
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#if defined(ENABLE_AO)
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ambient_light *= ao;
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ao_light_affect = mix(1.0, ao, ao_light_affect);
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specular_light *= ao_light_affect;
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diffuse_light *= ao_light_affect;
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#endif
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// base color remapping
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diffuse_light *= 1.0 - metallic; // TODO: avoid all diffuse and ambient light calculations when metallic == 1 up to this point
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ambient_light *= 1.0 - metallic;
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if (fog_color_enabled.a > 0.5) {
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float fog_amount = 0.0;
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#ifdef USE_LIGHT_DIRECTIONAL
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vec3 fog_color = mix(fog_color_enabled.rgb, fog_sun_color_amount.rgb, fog_sun_color_amount.a * pow(max(dot(normalize(vertex), -light_direction_attenuation.xyz), 0.0), 8.0));
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#else
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vec3 fog_color = fog_color_enabled.rgb;
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#endif
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//apply fog
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if (fog_depth_enabled) {
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float fog_far = fog_depth_end > 0.0 ? fog_depth_end : z_far;
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float fog_z = smoothstep(fog_depth_begin, fog_far, length(vertex));
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fog_amount = pow(fog_z, fog_depth_curve) * fog_density;
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if (fog_transmit_enabled) {
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vec3 total_light = emission + ambient_light + specular_light + diffuse_light;
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float transmit = pow(fog_z, fog_transmit_curve);
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fog_color = mix(max(total_light, fog_color), fog_color, transmit);
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}
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}
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|
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if (fog_height_enabled) {
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float y = (camera_matrix * vec4(vertex, 1.0)).y;
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fog_amount = max(fog_amount, pow(smoothstep(fog_height_min, fog_height_max, y), fog_height_curve));
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}
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|
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float rev_amount = 1.0 - fog_amount;
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|
|
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emission = emission * rev_amount + fog_color * fog_amount;
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|
ambient_light *= rev_amount;
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|
specular_light *= rev_amount;
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diffuse_light *= rev_amount;
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|
}
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|
|
|
#ifdef USE_MULTIPLE_RENDER_TARGETS
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|
|
|
#ifdef SHADELESS
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diffuse_buffer = vec4(albedo.rgb, 0.0);
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specular_buffer = vec4(0.0);
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|
|
|
#else
|
|
|
|
//approximate ambient scale for SSAO, since we will lack full ambient
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|
float max_emission = max(emission.r, max(emission.g, emission.b));
|
|
float max_ambient = max(ambient_light.r, max(ambient_light.g, ambient_light.b));
|
|
float max_diffuse = max(diffuse_light.r, max(diffuse_light.g, diffuse_light.b));
|
|
float total_ambient = max_ambient + max_diffuse;
|
|
#ifdef USE_FORWARD_LIGHTING
|
|
total_ambient += max_emission;
|
|
#endif
|
|
float ambient_scale = (total_ambient > 0.0) ? (max_ambient + ambient_occlusion_affect_light * max_diffuse) / total_ambient : 0.0;
|
|
|
|
#if defined(ENABLE_AO)
|
|
ambient_scale = mix(0.0, ambient_scale, ambient_occlusion_affect_ao_channel);
|
|
#endif
|
|
diffuse_buffer = vec4(diffuse_light + ambient_light, ambient_scale);
|
|
specular_buffer = vec4(specular_light, metallic);
|
|
|
|
#ifdef USE_FORWARD_LIGHTING
|
|
diffuse_buffer.rgb += emission;
|
|
#endif
|
|
#endif //SHADELESS
|
|
|
|
normal_mr_buffer = vec4(normalize(normal) * 0.5 + 0.5, roughness);
|
|
|
|
#if defined(ENABLE_SSS)
|
|
sss_buffer = sss_strength;
|
|
#endif
|
|
|
|
#else //USE_MULTIPLE_RENDER_TARGETS
|
|
|
|
#ifdef SHADELESS
|
|
frag_color = vec4(albedo, alpha);
|
|
#else
|
|
frag_color = vec4(ambient_light + diffuse_light + specular_light, alpha);
|
|
#ifdef USE_FORWARD_LIGHTING
|
|
frag_color.rgb += emission;
|
|
#endif
|
|
#endif //SHADELESS
|
|
|
|
#endif //USE_MULTIPLE_RENDER_TARGETS
|
|
|
|
#endif //RENDER_DEPTH
|
|
}
|