157 lines
3.3 KiB
GLSL
157 lines
3.3 KiB
GLSL
#define _AlphaTest
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#define _Instancing
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#define _Texturing
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#define _VCols
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//--------------------------------------------------------
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#ifdef GL_ES
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precision mediump float;
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#endif
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#ifdef _NormalMapping
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#define _Texturing
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#endif
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#ifdef _Texturing
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uniform sampler2D stex;
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#endif
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uniform sampler2D shadowMap;
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#ifdef _NormalMapping
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uniform sampler2D normalMap;
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#endif
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uniform bool lighting;
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uniform bool receiveShadow;
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uniform float roughness;
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varying vec3 position;
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#ifdef _Texturing
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varying vec2 texCoord;
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#endif
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varying vec3 normal;
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varying vec4 lPos;
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varying vec4 matColor;
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varying vec3 lightDir;
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varying vec3 eyeDir;
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float shadowSimple(vec4 lPos) {
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vec4 lPosH = lPos / lPos.w;
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lPosH.x = (lPosH.x + 1.0) / 2.0;
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lPosH.y = 1.0 - ((-lPosH.y + 1.0) / (2.0));
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vec4 packedZValue = texture2D(shadowMap, lPosH.st);
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float distanceFromLight = packedZValue.z;
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//float bias = clamp(0.005*tan(acos(dotNL)), 0, 0.01);
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float bias = 0.0;//0.0005;
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// 1.0 = not in shadow, 0.0 = in shadow
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return float(distanceFromLight > lPosH.z - bias);
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}
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vec2 LightingFuncGGX_FV(float dotLH, float roughness) {
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float alpha = roughness*roughness;
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// F
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float F_a, F_b;
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float dotLH5 = pow(1.0 - dotLH, 5.0);
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F_a = 1.0;
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F_b = dotLH5;
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// V
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float vis;
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float k = alpha / 2.0;
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float k2 = k * k;
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float invK2 = 1.0 - k2;
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//vis = rcp(dotLH * dotLH * invK2 + k2);
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vis = inversesqrt(dotLH * dotLH * invK2 + k2);
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return vec2(F_a * vis, F_b * vis);
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}
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float LightingFuncGGX_D(float dotNH, float roughness) {
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float alpha = roughness * roughness;
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float alphaSqr = alpha * alpha;
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float pi = 3.14159;
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float denom = dotNH * dotNH * (alphaSqr - 1.0) + 1.0;
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float D = alphaSqr / (pi * denom * denom);
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return D;
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}
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// John Hable - Optimizing GGX Shaders
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// http://www.filmicworlds.com/2014/04/21/optimizing-ggx-shaders-with-dotlh/
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float LightingFuncGGX_OPT3(vec3 N, vec3 V, vec3 L, float roughness, float F0) {
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vec3 H = normalize(V + L);
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float dotNL = clamp(dot(N, L), 0.0, 1.0);
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float dotLH = clamp(dot(L, H), 0.0, 1.0);
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float dotNH = clamp(dot(N, H), 0.0, 1.0);
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float D = LightingFuncGGX_D(dotNH, roughness);
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vec2 FV_helper = LightingFuncGGX_FV(dotLH, roughness);
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float FV = F0 * FV_helper.x + (1.0 - F0) * FV_helper.y;
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float specular = dotNL * D * FV;
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return specular;
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}
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void kore() {
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float visibility = 1.0;
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if (receiveShadow && lPos.w > 0.0) {
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visibility = shadowSimple(lPos);
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visibility = (visibility * 0.8) + 0.2;
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}
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vec4 outColor;
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vec3 t = pow(matColor.rgb, vec3(2.2));
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if (lighting) {
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float specular = 0.1;
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vec3 n = normalize(normal);
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vec3 l = lightDir;
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vec3 v = eyeDir;
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float dotNL = 0.0;
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#ifdef _NormalMapping
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vec3 tn = normalize(texture2D(normalMap, texCoord).rgb * 2.0 - 1.0);
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dotNL = clamp(dot(tn, l), 0.0, 1.0);
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#else
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dotNL = clamp(dot(n, l), 0.0, 1.0);
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#endif
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float spec = LightingFuncGGX_OPT3(n, v, l, roughness, specular);
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vec3 rgb = spec + t * dotNL;
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outColor = vec4(vec3(rgb * visibility), 1.0);
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}
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else {
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outColor = vec4(t * visibility, 1.0);
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}
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#ifdef _Texturing
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vec4 texel = texture2D(stex, texCoord);
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#ifdef _AlphaTest
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if(texel.a < 0.4)
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discard;
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#endif
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outColor = vec4(texel * outColor);
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#else
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outColor = vec4(outColor.rgb, 1.0);
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#endif
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gl_FragColor = vec4(pow(outColor.rgb, vec3(1.0 / 2.2)), outColor.a);
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}
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//--------------------------------------------------------
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//--------------------------------------------------------
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