52 lines
1.6 KiB
GLSL
52 lines
1.6 KiB
GLSL
#version 330 core
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// Matrices
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uniform mat4 modelViewMatrix;
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uniform mat4 MVP;
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uniform mat4 normalMatrix;
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uniform mat4 viewMatrix;
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uniform int nbDirLights;
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uniform vec3 dirLights[8];
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uniform int nbPointLights;
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uniform vec3 pointLights[8];
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layout(location = 0)in vec3 inPosition;
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layout(location = 1)in vec3 inNormal;
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layout(location = 2)in vec4 inTexCoord;
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out vec3 lightDirInView[4];
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out vec3 halfVecInView[4];
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out vec3 varNormal;
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out vec2 varTexCoord;
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void computeDirectionnalLightingVectorsInView(in vec3 posInView, in vec3 lightDirInWorld, out vec3 lightDir, out vec3 halfVec){
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lightDir = mat3(viewMatrix)*lightDirInWorld;
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halfVec = normalize(normalize(lightDir) - normalize(posInView));
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lightDir = normalize(lightDir);
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}
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void computePointLightingVectorsInView(in vec3 posInView, in vec3 lightPosition, out vec3 lightDir, out vec3 halfVec){
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lightDir = vec3(viewMatrix*vec4(lightPosition, 1.0)) - posInView;
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halfVec = normalize(lightDir - posInView);
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lightDir = normalize(lightDir);
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}
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void main(void) {
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int i;
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for(i=0; i<nbDirLights && i<4; ++i)
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computeDirectionnalLightingVectorsInView(vec3(modelViewMatrix*vec4(inPosition, 1.0)), dirLights[i*2], lightDirInView[i], halfVecInView[i]);
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for(i=0; i<nbPointLights && i+nbDirLights<4; ++i)
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computePointLightingVectorsInView(vec3(modelViewMatrix*vec4(inPosition, 1.0)), pointLights[i*2], lightDirInView[nbDirLights+i], halfVecInView[nbDirLights+i]);
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// normales corrigees (en fonction de la vue)
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varNormal = normalize(vec3(normalMatrix*vec4(inNormal,0)));
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// coordonnees de texture
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varTexCoord = inTexCoord.xy;
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// position du vertex
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gl_Position = MVP * vec4(inPosition, 1.0);
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}
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