mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2025-02-18 18:01:13 +00:00
a032aa5adf
They work nicely now when the normal map and texture are bypassed (don't know what texture is getting used currently).
65 lines
1.2 KiB
GLSL
65 lines
1.2 KiB
GLSL
struct light {
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vec4 position; // xyz = pos, w = strength
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vec4 color; // rgb. a = ?
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};
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uniform sampler2D texture;
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uniform sampler2D normalmap;
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uniform light lights[8];
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uniform vec4 fog;
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varying vec3 position;
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varying vec3 bitangent;
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varying vec3 tangent;
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varying vec3 normal;
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varying vec2 st;
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varying vec4 color;
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float
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sqr (float x)
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{
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return x * x;
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}
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vec4
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fogBlend (vec4 color)
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{
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float f;
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vec4 fog_color = vec4 (fog.rgb, 1.0);
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f = exp (-sqr (fog.a / gl_FragCoord.w));
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return mix (fog_color, color, f);
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}
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vec3
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calc_light (vec3 n, int ind)
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{
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vec3 d;
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light l = lights[ind];
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float mag;
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d = position - l.position.xyz;
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mag = dot (d, n);
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mag = max (0.0, mag);
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return l.color.rgb * (l.position.w * mag / dot (d, d));
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}
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void
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main (void)
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{
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mat3 tbn = mat3 (tangent, bitangent, normal);
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vec3 norm, l;
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vec4 col;
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norm = texture2D (normalmap, st).xyz;
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norm = tbn * norm;
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l = calc_light (norm, 0);
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l += calc_light (norm, 1);
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l += calc_light (norm, 2);
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l += calc_light (norm, 3);
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l += calc_light (norm, 4);
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l += calc_light (norm, 5);
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l += calc_light (norm, 6);
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l += calc_light (norm, 7);
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col = texture2D (texture, st) * color * vec4 (l, 1.0);
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gl_FragColor = fogBlend (col);
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}
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