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SSAO: Some tweaks.

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git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@15059 178a84e3-b1eb-0310-8ba1-8eac791a3b58
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vincentlj 2014-01-13 18:59:59 +00:00
parent df62ac5949
commit c88d89a4f0
1 changed files with 2 additions and 8 deletions
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10
data/shaders/ssao.frag
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@ -15,10 +15,6 @@ const float invSamples = strengh / SAMPLES;
void main(void)
{
// A set of Random(tm) vec2's. 8 1s, 6 0.7s, 2 0.4
// Again not using const because of broken Intel Windows drivers
vec4 cur = texture2D(normals_and_depth, uv);
float curdepth = texture2D(normals_and_depth, uv).a;
vec4 FragPos = invprojm * (2.0f * vec4(uv, curdepth, 1.0f) - 1.0f);
@ -40,8 +36,6 @@ void main(void)
vec4 samplePos = FragPos + radius * vec4(sampleDir, 0.0);
vec4 sampleProj = projm * samplePos;
sampleProj /= sampleProj.w;
// Projection of sampleDir over nom
float cosTheta = samplePoints[i].z;
bool isInsideTexture = (sampleProj.x > -1.) && (sampleProj.x < 1.) && (sampleProj.y > -1.) && (sampleProj.y < 1.);
// get the depth of the occluder fragment
@ -51,11 +45,11 @@ void main(void)
occluderPos /= occluderPos.w;
bool isOccluded = isInsideTexture && (sampleProj.z > (2. * occluderFragmentDepth - 1.0)) && (distance(FragPos, occluderPos) < radius);
bl += isOccluded ? smoothstep(radius, 0, distance(samplePos, FragPos)) * cosTheta : 0.;
bl += isOccluded ? smoothstep(radius, 0, distance(samplePos, FragPos)) / smoothstep(0., 1., curdepth) : 0.;
}
// output the result
float ao = 1.0 - bl * invSamples;
gl_FragColor = vec4(vec3(ao), curdepth + 0.05); // offset so that the alpha test doesn't kill us
gl_FragColor = vec4(ao);
}