1417 lines
34 KiB
GLSL
1417 lines
34 KiB
GLSL
/* clang-format off */
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[vertex]
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#ifdef USE_GLES_OVER_GL
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#define mediump
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#define highp
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#else
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precision highp float;
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precision highp int;
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#endif
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#include "stdlib.glsl"
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#define SHADER_IS_SRGB true
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#define M_PI 3.14159265359
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//
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// attributes
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//
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attribute highp vec4 vertex_attrib; // attrib:0
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/* clang-format on */
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attribute vec3 normal_attrib; // attrib:1
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
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attribute vec4 tangent_attrib; // attrib:2
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#endif
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#ifdef ENABLE_COLOR_INTERP
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attribute vec4 color_attrib; // attrib:3
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#endif
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#ifdef ENABLE_UV_INTERP
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attribute vec2 uv_attrib; // attrib:4
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#endif
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#ifdef ENABLE_UV2_INTERP
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attribute vec2 uv2_attrib; // attrib:5
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#endif
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#ifdef USE_SKELETON
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#ifdef USE_SKELETON_SOFTWARE
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attribute highp vec4 bone_transform_row_0; // attrib:8
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attribute highp vec4 bone_transform_row_1; // attrib:9
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attribute highp vec4 bone_transform_row_2; // attrib:10
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#else
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attribute vec4 bone_ids; // attrib:6
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attribute highp vec4 bone_weights; // attrib:7
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uniform highp sampler2D bone_transforms; // texunit:-1
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uniform ivec2 skeleton_texture_size;
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#endif
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#endif
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#ifdef USE_INSTANCING
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attribute highp vec4 instance_xform_row_0; // attrib:8
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attribute highp vec4 instance_xform_row_1; // attrib:9
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attribute highp vec4 instance_xform_row_2; // attrib:10
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attribute highp vec4 instance_color; // attrib:11
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attribute highp vec4 instance_custom_data; // attrib:12
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#endif
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//
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// uniforms
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//
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uniform mat4 camera_matrix;
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uniform mat4 camera_inverse_matrix;
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uniform mat4 projection_matrix;
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uniform mat4 projection_inverse_matrix;
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uniform mat4 world_transform;
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uniform highp float time;
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uniform float normal_mult;
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#ifdef RENDER_DEPTH
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uniform float light_bias;
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uniform float light_normal_bias;
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#endif
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//
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// varyings
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//
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varying highp vec3 vertex_interp;
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varying vec3 normal_interp;
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
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varying vec3 tangent_interp;
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varying vec3 binormal_interp;
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#endif
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#ifdef ENABLE_COLOR_INTERP
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varying vec4 color_interp;
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#endif
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#ifdef ENABLE_UV_INTERP
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varying vec2 uv_interp;
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#endif
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#ifdef ENABLE_UV2_INTERP
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varying vec2 uv2_interp;
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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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varying highp float dp_clip;
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uniform highp float shadow_dual_paraboloid_render_zfar;
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uniform highp float shadow_dual_paraboloid_render_side;
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#endif
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#if defined(USE_SHADOW) && defined(USE_LIGHTING)
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#ifdef LIGHT_MODE_DIRECTIONAL
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uniform highp sampler2D light_directional_shadow; // texunit:-3
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uniform highp vec4 light_split_offsets;
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#endif
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uniform highp mat4 light_shadow_matrix;
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varying highp vec4 shadow_coord;
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#if defined(LIGHT_USE_PSSM2) || defined(LIGHT_USE_PSSM4)
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uniform highp mat4 light_shadow_matrix2;
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varying highp vec4 shadow_coord2;
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#endif
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#if defined(LIGHT_USE_PSSM4)
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uniform highp mat4 light_shadow_matrix3;
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uniform highp mat4 light_shadow_matrix4;
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varying highp vec4 shadow_coord3;
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varying highp vec4 shadow_coord4;
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#endif
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#endif
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#if defined(USE_VERTEX_LIGHTING) && defined(USE_LIGHTING)
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varying highp vec3 diffuse_interp;
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varying highp vec3 specular_interp;
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// general for all lights
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uniform vec4 light_color;
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uniform float light_specular;
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// directional
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uniform vec3 light_direction;
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// omni
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uniform vec3 light_position;
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uniform float light_range;
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uniform vec4 light_attenuation;
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// spot
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uniform float light_spot_attenuation;
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uniform float light_spot_range;
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uniform float light_spot_angle;
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void light_compute(
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vec3 N,
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vec3 L,
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vec3 V,
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vec3 light_color,
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vec3 attenuation,
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float roughness) {
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//this makes lights behave closer to linear, but then addition of lights looks bad
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//better left disabled
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//#define SRGB_APPROX(m_var) m_var = pow(m_var,0.4545454545);
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/*
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#define SRGB_APPROX(m_var) {\
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float S1 = sqrt(m_var);\
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float S2 = sqrt(S1);\
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float S3 = sqrt(S2);\
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m_var = 0.662002687 * S1 + 0.684122060 * S2 - 0.323583601 * S3 - 0.0225411470 * m_var;\
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}
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*/
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#define SRGB_APPROX(m_var)
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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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SRGB_APPROX(diffuse_brdf_NL)
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diffuse_interp += light_color * diffuse_brdf_NL * attenuation;
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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 cVdotH = max(dot(V, H), 0.0);
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float cLdotH = max(dot(L, 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 + 8.0) / (8.0 * 3.141592654);
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specular_brdf_NL = (blinn) / max(4.0 * cNdotV * cNdotL, 0.75);
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#endif
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SRGB_APPROX(specular_brdf_NL)
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specular_interp += specular_brdf_NL * light_color * attenuation;
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}
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}
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#endif
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void main() {
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highp vec4 vertex = vertex_attrib;
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mat4 world_matrix = world_transform;
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#ifdef USE_INSTANCING
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{
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highp mat4 m = mat4(
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instance_xform_row_0,
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instance_xform_row_1,
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instance_xform_row_2,
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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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vec3 normal = normal_attrib * normal_mult;
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
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vec3 tangent = tangent_attrib.xyz;
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tangent *= normal_mult;
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float binormalf = tangent_attrib.a;
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vec3 binormal = normalize(cross(normal, tangent) * binormalf);
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#endif
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#ifdef ENABLE_COLOR_INTERP
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color_interp = color_attrib;
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#ifdef USE_INSTANCING
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color_interp *= instance_color;
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#endif
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#endif
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#ifdef ENABLE_UV_INTERP
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uv_interp = uv_attrib;
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#endif
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#ifdef ENABLE_UV2_INTERP
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uv2_interp = uv2_attrib;
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#endif
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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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normal = normalize((world_matrix * vec4(normal, 0.0)).xyz);
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
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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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#ifdef USE_SKELETON
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highp mat4 bone_transform = mat4(0.0);
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#ifdef USE_SKELETON_SOFTWARE
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// passing the transform as attributes
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bone_transform[0] = vec4(bone_transform_row_0.x, bone_transform_row_1.x, bone_transform_row_2.x, 0.0);
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bone_transform[1] = vec4(bone_transform_row_0.y, bone_transform_row_1.y, bone_transform_row_2.y, 0.0);
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bone_transform[2] = vec4(bone_transform_row_0.z, bone_transform_row_1.z, bone_transform_row_2.z, 0.0);
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bone_transform[3] = vec4(bone_transform_row_0.w, bone_transform_row_1.w, bone_transform_row_2.w, 1.0);
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#else
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// look up transform from the "pose texture"
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{
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for (int i = 0; i < 4; i++) {
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ivec2 tex_ofs = ivec2(int(bone_ids[i]) * 3, 0);
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highp mat4 b = mat4(
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texel2DFetch(bone_transforms, skeleton_texture_size, tex_ofs + ivec2(0, 0)),
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texel2DFetch(bone_transforms, skeleton_texture_size, tex_ofs + ivec2(1, 0)),
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texel2DFetch(bone_transforms, skeleton_texture_size, tex_ofs + ivec2(2, 0)),
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vec4(0.0, 0.0, 0.0, 1.0));
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bone_transform += transpose(b) * bone_weights[i];
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}
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}
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#endif
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world_matrix = bone_transform * world_matrix;
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#endif
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#ifdef USE_INSTANCING
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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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mat4 modelview = camera_matrix * world_matrix;
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float roughness = 1.0;
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#define world_transform world_matrix
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{
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/* clang-format off */
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VERTEX_SHADER_CODE
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/* clang-format on */
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}
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vec4 outvec = vertex;
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// use local coordinates
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#if !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED)
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vertex = modelview * vertex;
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normal = normalize((modelview * vec4(normal, 0.0)).xyz);
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
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tangent = normalize((modelview * vec4(tangent, 0.0)).xyz);
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binormal = normalize((modelview * vec4(binormal, 0.0)).xyz);
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#endif
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#endif
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#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
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vertex = camera_matrix * vertex;
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normal = normalize((camera_matrix * vec4(normal, 0.0)).xyz);
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
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tangent = normalize((camera_matrix * vec4(tangent, 0.0)).xyz);
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binormal = normalize((camera_matrix * vec4(binormal, 0.0)).xyz);
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#endif
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#endif
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vertex_interp = vertex.xyz;
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normal_interp = normal;
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#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
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tangent_interp = tangent;
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binormal_interp = binormal;
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#endif
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#ifdef RENDER_DEPTH
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#ifdef RENDER_DEPTH_DUAL_PARABOLOID
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vertex_interp.z *= shadow_dual_paraboloid_render_side;
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normal_interp.z *= shadow_dual_paraboloid_render_side;
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dp_clip = vertex_interp.z; //this attempts to avoid noise caused by objects sent to the other parabolloid side due to bias
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//for dual paraboloid shadow mapping, this is the fastest but least correct way, as it curves straight edges
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highp vec3 vtx = vertex_interp + normalize(vertex_interp) * light_bias;
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highp float distance = length(vtx);
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vtx = normalize(vtx);
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vtx.xy /= 1.0 - vtx.z;
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vtx.z = (distance / shadow_dual_paraboloid_render_zfar);
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vtx.z = vtx.z * 2.0 - 1.0;
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vertex_interp = vtx;
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#else
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float z_ofs = light_bias;
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z_ofs += (1.0 - abs(normal_interp.z)) * light_normal_bias;
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vertex_interp.z -= z_ofs;
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#endif //dual parabolloid
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#endif //depth
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//vertex lighting
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#if defined(USE_VERTEX_LIGHTING) && defined(USE_LIGHTING)
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//vertex shaded version of lighting (more limited)
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vec3 L;
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vec3 light_att;
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#ifdef LIGHT_MODE_OMNI
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vec3 light_vec = light_position - vertex_interp;
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float light_length = length(light_vec);
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float normalized_distance = light_length / light_range;
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float omni_attenuation = pow(1.0 - normalized_distance, light_attenuation.w);
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vec3 attenuation = vec3(omni_attenuation);
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light_att = vec3(omni_attenuation);
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L = normalize(light_vec);
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#endif
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#ifdef LIGHT_MODE_SPOT
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vec3 light_rel_vec = light_position - vertex_interp;
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float light_length = length(light_rel_vec);
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float normalized_distance = light_length / light_range;
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float spot_attenuation = pow(1.0 - normalized_distance, light_attenuation.w);
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vec3 spot_dir = light_direction;
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float spot_cutoff = light_spot_angle;
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float scos = max(dot(-normalize(light_rel_vec), spot_dir), spot_cutoff);
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float spot_rim = max(0.0001, (1.0 - scos) / (1.0 - spot_cutoff));
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spot_attenuation *= 1.0 - pow(spot_rim, light_spot_attenuation);
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light_att = vec3(spot_attenuation);
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L = normalize(light_rel_vec);
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#endif
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#ifdef LIGHT_MODE_DIRECTIONAL
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vec3 light_vec = -light_direction;
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light_att = vec3(1.0); //no base attenuation
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L = normalize(light_vec);
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#endif
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diffuse_interp = vec3(0.0);
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specular_interp = vec3(0.0);
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light_compute(normal_interp, L, -normalize(vertex_interp), light_color.rgb, light_att, roughness);
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#endif
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//shadows (for both vertex and fragment)
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#if defined(USE_SHADOW) && defined(USE_LIGHTING)
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vec4 vi4 = vec4(vertex_interp, 1.0);
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shadow_coord = light_shadow_matrix * vi4;
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#if defined(LIGHT_USE_PSSM2) || defined(LIGHT_USE_PSSM4)
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shadow_coord2 = light_shadow_matrix2 * vi4;
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#endif
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#if defined(LIGHT_USE_PSSM4)
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shadow_coord3 = light_shadow_matrix3 * vi4;
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shadow_coord3 = light_shadow_matrix3 * vi4;
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#endif
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#endif //use shadow and use lighting
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gl_Position = projection_matrix * vec4(vertex_interp, 1.0);
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}
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/* clang-format off */
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[fragment]
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#extension GL_ARB_shader_texture_lod : enable
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#ifndef GL_ARB_shader_texture_lod
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#define texture2DLod(img, coord, lod) texture2D(img, coord)
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#define textureCubeLod(img, coord, lod) textureCube(img, coord)
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#endif
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#ifdef USE_GLES_OVER_GL
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#define mediump
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#define highp
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#else
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precision mediump float;
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precision highp int;
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#endif
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#include "stdlib.glsl"
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#define M_PI 3.14159265359
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#define SHADER_IS_SRGB true
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//
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// uniforms
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//
|
|
|
|
uniform mat4 camera_matrix;
|
|
/* clang-format on */
|
|
uniform mat4 camera_inverse_matrix;
|
|
uniform mat4 projection_matrix;
|
|
uniform mat4 projection_inverse_matrix;
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|
|
|
uniform mat4 world_transform;
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|
|
|
uniform highp float time;
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|
|
|
#ifdef SCREEN_UV_USED
|
|
uniform vec2 screen_pixel_size;
|
|
#endif
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|
|
|
// I think supporting this in GLES2 is difficult
|
|
// uniform highp sampler2D depth_buffer;
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|
|
#if defined(SCREEN_TEXTURE_USED)
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|
uniform highp sampler2D screen_texture; //texunit:-4
|
|
#endif
|
|
|
|
#ifdef USE_RADIANCE_MAP
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|
|
|
#define RADIANCE_MAX_LOD 6.0
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|
|
|
uniform samplerCube radiance_map; // texunit:-2
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|
|
|
uniform mat4 radiance_inverse_xform;
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|
|
|
#endif
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|
|
|
uniform float bg_energy;
|
|
|
|
uniform float ambient_sky_contribution;
|
|
uniform vec4 ambient_color;
|
|
uniform float ambient_energy;
|
|
|
|
#ifdef USE_LIGHTING
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
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|
|
|
//get from vertex
|
|
varying highp vec3 diffuse_interp;
|
|
varying highp vec3 specular_interp;
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|
|
|
#else
|
|
//done in fragment
|
|
// general for all lights
|
|
uniform vec4 light_color;
|
|
uniform float light_specular;
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|
|
// directional
|
|
uniform vec3 light_direction;
|
|
// omni
|
|
uniform vec3 light_position;
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|
|
|
uniform vec4 light_attenuation;
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|
|
|
// spot
|
|
uniform float light_spot_attenuation;
|
|
uniform float light_spot_range;
|
|
uniform float light_spot_angle;
|
|
#endif
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|
|
|
//this is needed outside above if because dual paraboloid wants it
|
|
uniform float light_range;
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|
|
|
#ifdef USE_SHADOW
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|
|
|
uniform highp vec2 shadow_pixel_size;
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|
|
|
#if defined(LIGHT_MODE_OMNI) || defined(LIGHT_MODE_SPOT)
|
|
uniform highp sampler2D light_shadow_atlas; //texunit:-3
|
|
#endif
|
|
|
|
#ifdef LIGHT_MODE_DIRECTIONAL
|
|
uniform highp sampler2D light_directional_shadow; // texunit:-3
|
|
uniform highp vec4 light_split_offsets;
|
|
#endif
|
|
|
|
varying highp vec4 shadow_coord;
|
|
|
|
#if defined(LIGHT_USE_PSSM2) || defined(LIGHT_USE_PSSM4)
|
|
varying highp vec4 shadow_coord2;
|
|
#endif
|
|
|
|
#if defined(LIGHT_USE_PSSM4)
|
|
|
|
varying highp vec4 shadow_coord3;
|
|
varying highp vec4 shadow_coord4;
|
|
|
|
#endif
|
|
|
|
uniform vec4 light_clamp;
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|
|
|
#endif // light shadow
|
|
|
|
// directional shadow
|
|
|
|
#endif
|
|
|
|
//
|
|
// varyings
|
|
//
|
|
|
|
varying highp vec3 vertex_interp;
|
|
varying vec3 normal_interp;
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
|
|
varying vec3 tangent_interp;
|
|
varying vec3 binormal_interp;
|
|
#endif
|
|
|
|
#ifdef ENABLE_COLOR_INTERP
|
|
varying vec4 color_interp;
|
|
#endif
|
|
|
|
#ifdef ENABLE_UV_INTERP
|
|
varying vec2 uv_interp;
|
|
#endif
|
|
|
|
#ifdef ENABLE_UV2_INTERP
|
|
varying vec2 uv2_interp;
|
|
#endif
|
|
|
|
varying vec3 view_interp;
|
|
|
|
vec3 metallic_to_specular_color(float metallic, float specular, vec3 albedo) {
|
|
float dielectric = (0.034 * 2.0) * specular;
|
|
// energy conservation
|
|
return mix(vec3(dielectric), albedo, metallic); // TODO: reference?
|
|
}
|
|
|
|
/* clang-format off */
|
|
|
|
FRAGMENT_SHADER_GLOBALS
|
|
|
|
/* clang-format on */
|
|
|
|
#ifdef RENDER_DEPTH_DUAL_PARABOLOID
|
|
|
|
varying highp float dp_clip;
|
|
|
|
#endif
|
|
|
|
#ifdef USE_LIGHTING
|
|
|
|
// 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);
|
|
}
|
|
|
|
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 rim,
|
|
float rim_tint,
|
|
float clearcoat,
|
|
float clearcoat_gloss,
|
|
float anisotropy,
|
|
inout vec3 diffuse_light,
|
|
inout vec3 specular_light) {
|
|
|
|
//this makes lights behave closer to linear, but then addition of lights looks bad
|
|
//better left disabled
|
|
|
|
//#define SRGB_APPROX(m_var) m_var = pow(m_var,0.4545454545);
|
|
/*
|
|
#define SRGB_APPROX(m_var) {\
|
|
float S1 = sqrt(m_var);\
|
|
float S2 = sqrt(S1);\
|
|
float S3 = sqrt(S2);\
|
|
m_var = 0.662002687 * S1 + 0.684122060 * S2 - 0.323583601 * S3 - 0.0225411470 * m_var;\
|
|
}
|
|
*/
|
|
#define SRGB_APPROX(m_var)
|
|
|
|
#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);
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
vec3 H = normalize(V + L);
|
|
float cLdotH = max(0.0, dot(L, H));
|
|
|
|
float FD90 = 0.5 + 2.0 * cLdotH * cLdotH * roughness;
|
|
float FdV = 1.0 + (FD90 - 1.0) * SchlickFresnel(cNdotV);
|
|
float FdL = 1.0 + (FD90 - 1.0) * 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
|
|
|
|
SRGB_APPROX(diffuse_brdf_NL)
|
|
|
|
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) {
|
|
|
|
// D
|
|
|
|
float specular_brdf_NL;
|
|
|
|
#if defined(SPECULAR_BLINN)
|
|
|
|
//normalized blinn
|
|
vec3 H = normalize(V + L);
|
|
float cNdotH = max(dot(N, H), 0.0);
|
|
float cVdotH = max(dot(V, H), 0.0);
|
|
float cLdotH = max(dot(L, H), 0.0);
|
|
float shininess = exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25;
|
|
float blinn = pow(cNdotH, shininess);
|
|
blinn *= (shininess + 8.0) / (8.0 * 3.141592654);
|
|
specular_brdf_NL = (blinn) / max(4.0 * cNdotV * cNdotL, 0.75);
|
|
|
|
#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 + 8.0) / (8.0 * 3.141592654);
|
|
specular_brdf_NL = (phong) / max(4.0 * cNdotV * cNdotL, 0.75);
|
|
|
|
#elif defined(SPECULAR_TOON)
|
|
|
|
vec3 R = normalize(-reflect(L, N));
|
|
float RdotV = dot(R, V);
|
|
float mid = 1.0 - roughness;
|
|
mid *= mid;
|
|
specular_brdf_NL = smoothstep(mid - roughness * 0.5, mid + roughness * 0.5, RdotV) * mid;
|
|
|
|
#elif defined(SPECULAR_DISABLED)
|
|
// none..
|
|
specular_brdf_NL = 0.0;
|
|
#elif defined(SPECULAR_SCHLICK_GGX)
|
|
// shlick+ggx as default
|
|
|
|
vec3 H = normalize(V + L);
|
|
|
|
float cNdotH = max(dot(N, H), 0.0);
|
|
float cLdotH = max(dot(L, H), 0.0);
|
|
|
|
#if defined(LIGHT_USE_ANISOTROPY)
|
|
|
|
float aspect = sqrt(1.0 - anisotropy * 0.9);
|
|
float rx = roughness / aspect;
|
|
float ry = roughness * aspect;
|
|
float ax = rx * rx;
|
|
float ay = ry * ry;
|
|
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 = roughness * roughness;
|
|
float D = D_GGX(cNdotH, alpha);
|
|
float G = G_GGX_2cos(cNdotL, alpha) * G_GGX_2cos(cNdotV, alpha);
|
|
#endif
|
|
// F
|
|
//float F0 = 1.0;
|
|
//float cLdotH5 = SchlickFresnel(cLdotH);
|
|
//float F = mix(cLdotH5, 1.0, F0);
|
|
|
|
specular_brdf_NL = cNdotL * D /* F */ * G;
|
|
|
|
#endif
|
|
|
|
SRGB_APPROX(specular_brdf_NL)
|
|
specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation;
|
|
|
|
#if defined(LIGHT_USE_CLEARCOAT)
|
|
if (clearcoat_gloss > 0.0) {
|
|
#if !defined(SPECULAR_SCHLICK_GGX) && !defined(SPECULAR_BLINN)
|
|
vec3 H = normalize(V + L);
|
|
#endif
|
|
#if !defined(SPECULAR_SCHLICK_GGX)
|
|
float cNdotH = max(dot(N, H), 0.0);
|
|
float cLdotH = max(dot(L, H), 0.0);
|
|
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 specular_brdf_NL = 0.25 * clearcoat * Gr * Fr * Dr * cNdotL;
|
|
|
|
specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif //defined(USE_LIGHT_SHADER_CODE)
|
|
}
|
|
|
|
#endif
|
|
// shadows
|
|
|
|
#ifdef USE_SHADOW
|
|
|
|
#define SAMPLE_SHADOW_TEXEL(p_shadow, p_pos, p_depth) step(p_depth, texture2D(p_shadow, p_pos).r)
|
|
|
|
float sample_shadow(
|
|
highp sampler2D shadow,
|
|
highp vec2 pos,
|
|
highp float depth) {
|
|
|
|
#ifdef SHADOW_MODE_PCF_13
|
|
|
|
float avg = SAMPLE_SHADOW_TEXEL(shadow, pos, depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(shadow_pixel_size.x, 0.0), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(-shadow_pixel_size.x, 0.0), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(0.0, shadow_pixel_size.y), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(0.0, -shadow_pixel_size.y), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(shadow_pixel_size.x, shadow_pixel_size.y), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(-shadow_pixel_size.x, shadow_pixel_size.y), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(shadow_pixel_size.x, -shadow_pixel_size.y), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(-shadow_pixel_size.x, -shadow_pixel_size.y), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(shadow_pixel_size.x * 2.0, 0.0), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(-shadow_pixel_size.x * 2.0, 0.0), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(0.0, shadow_pixel_size.y * 2.0), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(0.0, -shadow_pixel_size.y * 2.0), depth);
|
|
return avg * (1.0 / 13.0);
|
|
#endif
|
|
|
|
#ifdef SHADOW_MODE_PCF_5
|
|
|
|
float avg = SAMPLE_SHADOW_TEXEL(shadow, pos, depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(shadow_pixel_size.x, 0.0), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(-shadow_pixel_size.x, 0.0), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(0.0, shadow_pixel_size.y), depth);
|
|
avg += SAMPLE_SHADOW_TEXEL(shadow, pos + vec2(0.0, -shadow_pixel_size.y), depth);
|
|
return avg * (1.0 / 5.0);
|
|
|
|
#endif
|
|
|
|
#if !defined(SHADOW_MODE_PCF_5) || !defined(SHADOW_MODE_PCF_13)
|
|
|
|
return SAMPLE_SHADOW_TEXEL(shadow, pos, depth);
|
|
#endif
|
|
}
|
|
|
|
#endif
|
|
|
|
void main() {
|
|
|
|
#ifdef RENDER_DEPTH_DUAL_PARABOLOID
|
|
|
|
if (dp_clip > 0.0)
|
|
discard;
|
|
#endif
|
|
highp vec3 vertex = vertex_interp;
|
|
vec3 albedo = vec3(1.0);
|
|
vec3 transmission = vec3(0.0);
|
|
float metallic = 0.0;
|
|
float specular = 0.5;
|
|
vec3 emission = vec3(0.0);
|
|
float roughness = 1.0;
|
|
float rim = 0.0;
|
|
float rim_tint = 0.0;
|
|
float clearcoat = 0.0;
|
|
float clearcoat_gloss = 0.0;
|
|
float anisotropy = 0.0;
|
|
vec2 anisotropy_flow = vec2(1.0, 0.0);
|
|
|
|
float alpha = 1.0;
|
|
float side = 1.0;
|
|
|
|
#if defined(ENABLE_AO)
|
|
float ao = 1.0;
|
|
float ao_light_affect = 0.0;
|
|
#endif
|
|
|
|
#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP)
|
|
vec3 binormal = normalize(binormal_interp) * side;
|
|
vec3 tangent = normalize(tangent_interp) * side;
|
|
#else
|
|
vec3 binormal = vec3(0.0);
|
|
vec3 tangent = vec3(0.0);
|
|
#endif
|
|
vec3 normal = normalize(normal_interp) * side;
|
|
|
|
#if defined(ENABLE_NORMALMAP)
|
|
vec3 normalmap = vec3(0.5);
|
|
#endif
|
|
float normaldepth = 1.0;
|
|
|
|
#ifdef ALPHA_SCISSOR_USED
|
|
float alpha_scissor = 0.5;
|
|
#endif
|
|
|
|
#ifdef SCREEN_UV_USED
|
|
vec2 screen_uv = gl_FragCoord.xy * screen_pixel_size;
|
|
#endif
|
|
|
|
{
|
|
/* clang-format off */
|
|
|
|
FRAGMENT_SHADER_CODE
|
|
|
|
/* clang-format on */
|
|
}
|
|
|
|
#if defined(ENABLE_NORMALMAP)
|
|
normalmap.xy = normalmap.xy * 2.0 - 1.0;
|
|
normalmap.z = sqrt(max(0.0, 1.0 - dot(normalmap.xy, normalmap.xy)));
|
|
|
|
// normal = normalize(mix(normal_interp, tangent * normalmap.x + binormal * normalmap.y + normal * normalmap.z, normaldepth)) * side;
|
|
normal = normalmap;
|
|
#endif
|
|
|
|
normal = normalize(normal);
|
|
|
|
vec3 N = normal;
|
|
|
|
vec3 specular_light = vec3(0.0, 0.0, 0.0);
|
|
vec3 diffuse_light = vec3(0.0, 0.0, 0.0);
|
|
vec3 ambient_light = vec3(0.0, 0.0, 0.0);
|
|
|
|
vec3 eye_position = -normalize(vertex_interp);
|
|
|
|
#ifdef ALPHA_SCISSOR_USED
|
|
if (alpha < alpha_scissor) {
|
|
discard;
|
|
}
|
|
#endif
|
|
|
|
#ifdef BASE_PASS
|
|
//none
|
|
#ifdef USE_RADIANCE_MAP
|
|
|
|
vec3 ref_vec = reflect(-eye_position, N);
|
|
ref_vec = normalize((radiance_inverse_xform * vec4(ref_vec, 0.0)).xyz);
|
|
|
|
ref_vec.z *= -1.0;
|
|
|
|
specular_light = textureCubeLod(radiance_map, ref_vec, roughness * RADIANCE_MAX_LOD).xyz * bg_energy;
|
|
|
|
{
|
|
vec3 ambient_dir = normalize((radiance_inverse_xform * vec4(normal, 0.0)).xyz);
|
|
vec3 env_ambient = textureCubeLod(radiance_map, ambient_dir, RADIANCE_MAX_LOD).xyz * bg_energy;
|
|
|
|
ambient_light = mix(ambient_color.rgb, env_ambient, ambient_sky_contribution);
|
|
}
|
|
|
|
#else
|
|
|
|
ambient_light = ambient_color.rgb;
|
|
|
|
#endif
|
|
|
|
ambient_light *= ambient_energy;
|
|
|
|
#endif //BASE PASS
|
|
|
|
//
|
|
// Lighting
|
|
//
|
|
#ifdef USE_LIGHTING
|
|
|
|
#ifndef USE_VERTEX_LIGHTING
|
|
vec3 L;
|
|
#endif
|
|
vec3 light_att = vec3(1.0);
|
|
|
|
#ifdef LIGHT_MODE_OMNI
|
|
|
|
#ifndef USE_VERTEX_LIGHTING
|
|
vec3 light_vec = light_position - vertex;
|
|
float light_length = length(light_vec);
|
|
|
|
float normalized_distance = light_length / light_range;
|
|
|
|
float omni_attenuation = pow(1.0 - normalized_distance, light_attenuation.w);
|
|
|
|
light_att = vec3(omni_attenuation);
|
|
L = normalize(light_vec);
|
|
|
|
#endif
|
|
|
|
#ifdef USE_SHADOW
|
|
{
|
|
highp vec3 splane = shadow_coord.xyz;
|
|
float shadow_len = length(splane);
|
|
|
|
splane = normalize(splane);
|
|
|
|
vec4 clamp_rect = light_clamp;
|
|
|
|
if (splane.z >= 0.0) {
|
|
splane.z += 1.0;
|
|
|
|
clamp_rect.y += clamp_rect.w;
|
|
} else {
|
|
splane.z = 1.0 - splane.z;
|
|
}
|
|
|
|
splane.xy /= splane.z;
|
|
splane.xy = splane.xy * 0.5 + 0.5;
|
|
splane.z = shadow_len / light_range;
|
|
|
|
splane.xy = clamp_rect.xy + splane.xy * clamp_rect.zw;
|
|
|
|
float shadow = sample_shadow(light_shadow_atlas, splane.xy, splane.z);
|
|
|
|
light_att *= shadow;
|
|
}
|
|
#endif
|
|
|
|
#endif //type omni
|
|
|
|
#ifdef LIGHT_MODE_DIRECTIONAL
|
|
|
|
#ifndef USE_VERTEX_LIGHTING
|
|
vec3 light_vec = -light_direction;
|
|
L = normalize(light_vec);
|
|
#endif
|
|
float depth_z = -vertex.z;
|
|
|
|
#ifdef USE_SHADOW
|
|
{
|
|
#ifdef LIGHT_USE_PSSM4
|
|
if (depth_z < light_split_offsets.w) {
|
|
#elif defined(LIGHT_USE_PSSM2)
|
|
if (depth_z < light_split_offsets.y) {
|
|
#else
|
|
if (depth_z < light_split_offsets.x) {
|
|
#endif //pssm2
|
|
|
|
vec3 pssm_coord;
|
|
float pssm_fade = 0.0;
|
|
|
|
#ifdef LIGHT_USE_PSSM_BLEND
|
|
float pssm_blend;
|
|
vec3 pssm_coord2;
|
|
bool use_blend = true;
|
|
#endif
|
|
|
|
#ifdef LIGHT_USE_PSSM4
|
|
if (depth_z < light_split_offsets.y) {
|
|
if (depth_z < light_split_offsets.x) {
|
|
highp vec4 splane = shadow_coord;
|
|
pssm_coord = splane.xyz / splane.w;
|
|
|
|
#ifdef LIGHT_USE_PSSM_BLEND
|
|
splane = shadow_coord2;
|
|
pssm_coord2 = splane.xyz / splane.w;
|
|
|
|
pssm_blend = smoothstep(0.0, light_split_offsets.x, depth_z);
|
|
#endif
|
|
} else {
|
|
highp vec4 splane = shadow_coord2;
|
|
pssm_coord = splane.xyz / splane.w;
|
|
|
|
#ifdef LIGHT_USE_PSSM_BLEND
|
|
splane = shadow_coord3;
|
|
pssm_coord2 = splane.xyz / splane.w;
|
|
|
|
pssm_blend = smoothstep(light_split_offsets.x, light_split_offsets.y, depth_z);
|
|
#endif
|
|
}
|
|
} else {
|
|
if (depth_z < light_split_offsets.z) {
|
|
|
|
highp vec4 splane = shadow_coord3;
|
|
pssm_coord = splane.xyz / splane.w;
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
splane = shadow_coord4;
|
|
pssm_coord2 = splane.xyz / splane.w;
|
|
pssm_blend = smoothstep(light_split_offsets.y, light_split_offsets.z, depth_z);
|
|
#endif
|
|
|
|
} else {
|
|
|
|
highp vec4 splane = shadow_coord4;
|
|
pssm_coord = splane.xyz / splane.w;
|
|
pssm_fade = smoothstep(light_split_offsets.z, light_split_offsets.w, depth_z);
|
|
|
|
#if defined(LIGHT_USE_PSSM_BLEND)
|
|
use_blend = false;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#endif // LIGHT_USE_PSSM4
|
|
|
|
#ifdef LIGHT_USE_PSSM2
|
|
if (depth_z < light_split_offsets.x) {
|
|
|
|
highp vec4 splane = shadow_coord;
|
|
pssm_coord = splane.xyz / splane.w;
|
|
|
|
#ifdef LIGHT_USE_PSSM_BLEND
|
|
splane = shadow_coord2;
|
|
pssm_coord2 = splane.xyz / splane.w;
|
|
pssm_blend = smoothstep(0.0, light_split_offsets.x, depth_z);
|
|
#endif
|
|
} else {
|
|
highp vec4 splane = shadow_coord2;
|
|
pssm_coord = splane.xyz / splane.w;
|
|
pssm_fade = smoothstep(light_split_offsets.x, light_split_offsets.y, depth_z);
|
|
#ifdef LIGHT_USE_PSSM_BLEND
|
|
use_blend = false;
|
|
#endif
|
|
}
|
|
|
|
#endif // LIGHT_USE_PSSM2
|
|
|
|
#if !defined(LIGHT_USE_PSSM4) && !defined(LIGHT_USE_PSSM2)
|
|
{
|
|
highp vec4 splane = shadow_coord;
|
|
pssm_coord = splane.xyz / splane.w;
|
|
}
|
|
#endif
|
|
|
|
float shadow = sample_shadow(light_directional_shadow, pssm_coord.xy, pssm_coord.z);
|
|
|
|
#ifdef LIGHT_USE_PSSM_BLEND
|
|
if (use_blend) {
|
|
shadow = mix(shadow, sample_shadow(light_directional_shadow, pssm_coord2.xy, pssm_coord2.z), pssm_blend);
|
|
}
|
|
#endif
|
|
|
|
light_att *= shadow;
|
|
}
|
|
}
|
|
#endif //use shadow
|
|
|
|
#endif
|
|
|
|
#ifdef LIGHT_MODE_SPOT
|
|
|
|
light_att = vec3(1.0);
|
|
|
|
#ifndef USE_VERTEX_LIGHTING
|
|
|
|
vec3 light_rel_vec = light_position - vertex;
|
|
float light_length = length(light_rel_vec);
|
|
float normalized_distance = light_length / light_range;
|
|
|
|
float spot_attenuation = pow(1.0 - normalized_distance, light_attenuation.w);
|
|
vec3 spot_dir = light_direction;
|
|
|
|
float spot_cutoff = light_spot_angle;
|
|
|
|
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, light_spot_attenuation);
|
|
|
|
light_att = vec3(spot_attenuation);
|
|
|
|
L = normalize(light_rel_vec);
|
|
|
|
#endif
|
|
|
|
#ifdef USE_SHADOW
|
|
{
|
|
highp vec4 splane = shadow_coord;
|
|
splane.xyz /= splane.w;
|
|
|
|
float shadow = sample_shadow(light_shadow_atlas, splane.xy, splane.z);
|
|
light_att *= shadow;
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#ifdef USE_VERTEX_LIGHTING
|
|
//vertex lighting
|
|
|
|
specular_light += specular_interp * specular * light_att;
|
|
diffuse_light += diffuse_interp * albedo * light_att;
|
|
|
|
#else
|
|
//fragment lighting
|
|
light_compute(
|
|
normal,
|
|
L,
|
|
eye_position,
|
|
binormal,
|
|
tangent,
|
|
light_color.xyz,
|
|
light_att,
|
|
albedo,
|
|
transmission,
|
|
specular * light_specular,
|
|
roughness,
|
|
metallic,
|
|
rim,
|
|
rim_tint,
|
|
clearcoat,
|
|
clearcoat_gloss,
|
|
anisotropy,
|
|
diffuse_light,
|
|
specular_light);
|
|
|
|
#endif //vertex lighting
|
|
|
|
#endif //USE_LIGHTING
|
|
//compute and merge
|
|
|
|
#ifndef RENDER_DEPTH
|
|
|
|
#ifdef SHADELESS
|
|
|
|
gl_FragColor = vec4(albedo, alpha);
|
|
#else
|
|
|
|
ambient_light *= albedo;
|
|
|
|
#if defined(ENABLE_AO)
|
|
ambient_light *= ao;
|
|
ao_light_affect = mix(1.0, ao, ao_light_affect);
|
|
specular_light *= ao_light_affect;
|
|
diffuse_light *= ao_light_affect;
|
|
#endif
|
|
|
|
diffuse_light *= 1.0 - metallic;
|
|
ambient_light *= 1.0 - metallic;
|
|
|
|
// environment BRDF approximation
|
|
|
|
// TODO shadeless
|
|
{
|
|
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
|
|
const vec4 c1 = vec4(1.0, 0.0425, 1.04, -0.04);
|
|
vec4 r = roughness * c0 + c1;
|
|
float ndotv = clamp(dot(normal, eye_position), 0.0, 1.0);
|
|
float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y;
|
|
vec2 AB = vec2(-1.04, 1.04) * a004 + r.zw;
|
|
|
|
vec3 specular_color = metallic_to_specular_color(metallic, specular, albedo);
|
|
specular_light *= AB.x * specular_color + AB.y;
|
|
}
|
|
|
|
gl_FragColor = vec4(ambient_light + diffuse_light + specular_light, alpha);
|
|
// gl_FragColor = vec4(normal, 1.0);
|
|
|
|
#endif //unshaded
|
|
|
|
#endif // not RENDER_DEPTH
|
|
}
|