45db87de8a
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14754 178a84e3-b1eb-0310-8ba1-8eac791a3b58
53 lines
992 B
GLSL
53 lines
992 B
GLSL
uniform sampler2D ntex;
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uniform sampler2D cloudtex;
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uniform vec3 center;
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uniform vec3 col;
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uniform vec2 screen;
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uniform mat4 invproj;
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uniform int hasclouds;
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uniform vec2 wind;
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void main() {
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vec2 texc = gl_FragCoord.xy / screen;
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float z = texture2D(ntex, texc).a;
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if (z < 0.03)
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{
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// Skyboxes are fully lit
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gl_FragData[0] = vec4(1.0);
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gl_FragData[1] = vec4(1.0);
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return;
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}
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vec3 norm = texture2D(ntex, texc).xyz;
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norm = (norm - 0.5) * 2.0;
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// Normalized on the cpu
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vec3 L = center;
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float NdotL = max(0.0, dot(norm, L));
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vec3 outcol = NdotL * col;
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if (hasclouds == 1)
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{
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vec3 tmp = vec3(texc, z);
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tmp = tmp * 2.0 - 1.0;
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vec4 xpos = vec4(tmp, 1.0);
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xpos = invproj * xpos;
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xpos.xyz /= xpos.w;
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vec2 cloudcoord = (xpos.xz * 0.00833333) + wind;
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float cloud = texture2D(cloudtex, cloudcoord).x;
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//float cloud = step(0.5, cloudcoord.x) * step(0.5, cloudcoord.y);
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outcol *= cloud;
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}
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gl_FragData[0] = vec4(outcol, 0.05);
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gl_FragData[1] = vec4(1.0);
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}
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