ilikecats/stk-code_catmod
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Implement Exponential Shadow map

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This commit is contained in:
Vincent Lejeune 2014-11-01 18:02:22 +01:00
parent 7679213e26
commit 9113aa7a39
2 changed files with 16 additions and 17 deletions
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25
data/shaders/sunlightshadow.frag
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@ -42,16 +42,21 @@ float getShadowFactor(vec3 pos, float bias, int index)
//float shadowmapz = 2. * texture(shadowtex, vec3(shadowtexcoord, shadowcoord.z).x - 1.;
// bias += smoothstep(0.001, 0.1, moved) * 0.014; // According to the warping
float sum = 0.;
for (float i = -1.5; i <= 1.5; i+= 1.)
{
for (float j = -1.5; j <= 1.5; j+= 1.)
{
float z = texture(shadowtex, vec3(shadowtexcoord +vec2(i, j) / 1024., float(index))).x;
sum += (z > 0.5 * shadowcoord.z + 0.5) ? 1. : 0.;
}
}
return sum / 16.;
// float sum = 0.;
// for (float i = -1.5; i <= 1.5; i+= 1.)
// {
// for (float j = -1.5; j <= 1.5; j+= 1.)
// {
// float z = texture(shadowtex, vec3(shadowtexcoord +vec2(i, j) / 1024., float(index))).x;
// sum += (z > 0.5 * shadowcoord.z + 0.5) ? 1. : 0.;
// }
// }
// return sum / 16.;
float z = texture(shadowtex, vec3(shadowtexcoord, float(index))).x;
float d = .5 * shadowcoord.z + .5;
return min(exp(1024 *(z - d)), 1.);
}
void main() {

8
src/graphics/render_geometry.cpp
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@ -978,11 +978,8 @@ void IrrDriver::renderShadows()
glDepthMask(GL_TRUE);
glEnable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
glEnable(GL_POLYGON_OFFSET_FILL);
glPolygonOffset(1.5, 0.);
m_rtts->getShadowFBO().Bind();
glClearColor(1., 1., 1., 1.);
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
glClearColor(0., 0., 0., 0.);
@ -1022,9 +1019,6 @@ void IrrDriver::renderShadows()
renderInstancedShadow<NormalMat>(cascade);
}
}
glDisable(GL_POLYGON_OFFSET_FILL);
glCullFace(GL_BACK);
}