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added point light shadow generation shaders

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This commit is contained in:
Anselme 2016-07-19 17:25:35 +02:00
parent 1cca1287ee
commit 44efb383a9
2 changed files with 34 additions and 9 deletions
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12
shaders/shadow.frag.glsl
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@ -5,11 +5,23 @@ in vec2 varTexCoord;
out float fragmentdepth;
#ifdef POINT_LIGHT
in vec4 FragPos;
uniform vec3 pointLight;
uniform float far_plane;
#endif
void main()
{
#ifdef ALPHA_MASK
if(texture(alphaMask, varTexCoord).r < 0.5)
discard;
#endif
#ifdef POINT_LIGHT
fragmentdepth = length(FragPos.xyz - pointLight)/far_plane;
#else
fragmentdepth = gl_FragCoord.z;
#endif
}

31
shaders/shadow.geom.glsl
View File

@ -1,16 +1,14 @@
layout(triangles) in;
#ifdef POINT_LIGHT
// inspired from
// http://learnopengl.com/#!Advanced-Lighting/Shadows/Point-Shadows
layout(triangles) in;
layout(triangle_strip, max_vertices = 18) out;
#ifdef POINT_LIGHT
uniform mat4 MVP[6];
#elif defined CASCADED
uniform mat4 frontShadowMVP;
uniform mat4 midShadowMVP;
uniform mat4 backShadowMVP;
#endif
uniform mat4 projectionMatrix;
uniform mat4 viewMatrices[6];
out vec4 FragPos;
@ -19,13 +17,28 @@ flat out int fcolor_idx;
void main(void){
for (int layerId = 0; layerId < 6; ++layerId){
mat4 MVP = projectionMatrix * viewMatrices[layerId];
for (int i = 0; i < gl_in.length(); ++i){
gl_Layer = layerId;
fcolor_idx = layerId;
FragPos = gl_in[i].gl_Position;
gl_Position = MVP[layerId] * FragPos;
gl_Position = MVP * FragPos;
EmitVertex();
}
EndPrimitive();
}
}
#elif defined CASCADED
layout(triangle_strip, max_vertices = 9) out;
uniform mat4 frontShadowMVP;
uniform mat4 midShadowMVP;
uniform mat4 backShadowMVP;
// TODO
#endif