35 lines
892 B
GLSL
35 lines
892 B
GLSL
//the final defered lighting pass.
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//the lighting values were written to some render target, which is fed into this shader, and now we draw all the wall textures with it.
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varying vec2 tc, lm;
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varying vec4 tf;
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#ifdef VERTEX_SHADER
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attribute vec2 v_texcoord;
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attribute vec2 v_lmcoord;
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void main ()
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{
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tc = v_texcoord;
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lm = v_lmcoord;
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gl_Position = tf = ftetransform();
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}
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#endif
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#ifdef FRAGMENT_SHADER
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uniform sampler2D s_t0;
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uniform sampler2D s_t1;
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uniform sampler2D s_t2;
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uniform vec4 e_lmscale;
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void main ()
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{
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vec2 nst;
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nst = tf.xy / tf.w;
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nst = (1.0 + nst) / 2.0;
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vec4 l = texture2D(s_t0, nst)*5.0;
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vec4 c = texture2D(s_t1, tc);
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vec3 lmsamp = texture2D(s_t2, lm).rgb*lmscale;
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vec3 diff = l.rgb;
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vec3 chrom = diff / (0.001 + dot(diff, vec3(0.3, 0.59, 0.11)));
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vec3 spec = chrom * l.a;
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gl_FragColor = vec4((diff + lmsamp) * c.xyz, 1.0);
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}
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#endif
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