c64b47548e
See http://thedev-log.blogspot.com/2012/07/texture-coordinates-tutorial-opengl-and.html, the "opengl coordinates" where inverted for proper support of direct3d texture coordinate system.
139 lines
3.7 KiB
GLSL
139 lines
3.7 KiB
GLSL
#ifndef _LIGHT_MOBILE_GLSL_
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#define _LIGHT_MOBILE_GLSL_
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#include "compiled.inc"
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#include "std/brdf.glsl"
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#ifdef _ShadowMap
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#include "std/shadows.glsl"
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#endif
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#ifdef _ShadowMap
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#ifdef _SinglePoint
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#ifdef _Spot
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uniform sampler2DShadow shadowMapSpot[1];
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uniform mat4 LWVPSpot[1];
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#else
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uniform samplerCubeShadow shadowMapPoint[1];
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uniform vec2 lightProj;
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#endif
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#endif
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#ifdef _Clusters
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#ifdef _SingleAtlas
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//!uniform sampler2DShadow shadowMapAtlas;
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#endif
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uniform vec2 lightProj;
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#ifdef _ShadowMapAtlas
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#ifndef _SingleAtlas
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uniform sampler2DShadow shadowMapAtlasPoint;
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#endif
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#else
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uniform samplerCubeShadow shadowMapPoint[4];
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#endif
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#ifdef _Spot
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#ifdef _ShadowMapAtlas
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#ifndef _SingleAtlas
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uniform sampler2DShadow shadowMapAtlasSpot;
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#endif
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#else
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uniform sampler2DShadow shadowMapSpot[maxLightsCluster];
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#endif
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uniform mat4 LWVPSpotArray[maxLightsCluster];
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#endif
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#endif
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#endif
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vec3 sampleLight(const vec3 p, const vec3 n, const vec3 v, const float dotNV, const vec3 lp, const vec3 lightCol,
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const vec3 albedo, const float rough, const float spec, const vec3 f0
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#ifdef _ShadowMap
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, int index, float bias, bool receiveShadow
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#endif
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#ifdef _Spot
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, bool isSpot, float spotA, float spotB, vec3 spotDir
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#endif
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) {
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vec3 ld = lp - p;
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vec3 l = normalize(ld);
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vec3 h = normalize(v + l);
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float dotNH = dot(n, h);
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float dotVH = dot(v, h);
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float dotNL = dot(n, l);
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vec3 direct = albedo * max(dotNL, 0.0) +
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specularBRDF(f0, rough, dotNL, dotNH, dotNV, dotVH) * spec;
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direct *= lightCol;
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direct *= attenuate(distance(p, lp));
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#ifdef _Spot
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if (isSpot) {
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float spotEffect = dot(spotDir, l); // lightDir
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// x - cutoff, y - cutoff - exponent
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if (spotEffect < spotA) {
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direct *= smoothstep(spotB, spotA, spotEffect);
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}
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#ifdef _ShadowMap
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if (receiveShadow) {
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#ifdef _SinglePoint
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vec4 lPos = LWVPSpot[0] * vec4(p + n * bias * 10, 1.0);
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direct *= shadowTest(shadowMapSpot[0], lPos.xyz / lPos.w, bias);
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#endif
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#ifdef _Clusters
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vec4 lPos = LWVPSpotArray[index] * vec4(p + n * bias * 10, 1.0);
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#ifdef _ShadowMapAtlas
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vec3 uv = lPos.xyz / lPos.w;
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#ifdef _InvY
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uv.y = 1.0 - uv.y; // invert Y coordinates for direct3d coordinate system
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#endif
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direct *= shadowTest(
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#ifndef _SingleAtlas
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shadowMapAtlasSpot
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#else
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shadowMapAtlas
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#endif
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, uv, bias
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);
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#else
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if (index == 0) direct *= shadowTest(shadowMapSpot[0], lPos.xyz / lPos.w, bias);
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else if (index == 1) direct *= shadowTest(shadowMapSpot[1], lPos.xyz / lPos.w, bias);
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else if (index == 2) direct *= shadowTest(shadowMapSpot[2], lPos.xyz / lPos.w, bias);
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else if (index == 3) direct *= shadowTest(shadowMapSpot[3], lPos.xyz / lPos.w, bias);
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#endif
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#endif
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}
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#endif
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return direct;
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}
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#endif
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#ifdef _ShadowMap
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#ifndef _Spot
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if (receiveShadow) {
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#ifdef _SinglePoint
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direct *= PCFCube(shadowMapPoint[0], ld, -l, bias, lightProj, n);
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#endif
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#ifdef _Clusters
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#ifdef _ShadowMapAtlas
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direct *= PCFFakeCube(
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#ifndef _SingleAtlas
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shadowMapAtlasPoint
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#else
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shadowMapAtlas
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#endif
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, ld, -l, bias, lightProj, n, index
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);
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#else
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if (index == 0) direct *= PCFCube(shadowMapPoint[0], ld, -l, bias, lightProj, n);
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else if (index == 1) direct *= PCFCube(shadowMapPoint[1], ld, -l, bias, lightProj, n);
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else if (index == 2) direct *= PCFCube(shadowMapPoint[2], ld, -l, bias, lightProj, n);
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else if (index == 3) direct *= PCFCube(shadowMapPoint[3], ld, -l, bias, lightProj, n);
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#endif
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#endif
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}
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#endif
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#endif
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return direct;
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}
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#endif
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