85 lines
1.5 KiB
GLSL
85 lines
1.5 KiB
GLSL
!!ver 100 450
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!!permu FOG
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!!samps diffuse lightmap
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!!cvardf gl_mono=0
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!!cvardf gl_stipplealpha=0
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#include "sys/defs.h"
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#include "sys/fog.h"
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varying vec2 tc;
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#ifdef LIT
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varying vec2 lm0;
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#endif
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#ifdef VERTEX_SHADER
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void main ()
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{
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tc = v_texcoord.st;
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#ifdef FLOW
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tc.s += e_time * -0.5;
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#endif
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#ifdef LIT
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lm0 = v_lmcoord;
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#endif
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gl_Position = ftetransform();
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}
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#endif
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#ifdef FRAGMENT_SHADER
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#ifndef ALPHA
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#define USEALPHA 1.0
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#else
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#define USEALPHA float(ALPHA)
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#endif
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void main ()
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{
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vec2 ntc;
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ntc.s = tc.s + sin(tc.t+e_time)*0.125;
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ntc.t = tc.t + sin(tc.s+e_time)*0.125;
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vec4 diffuse_f = texture2D(s_diffuse, ntc);
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diffuse_f *= e_colourident;
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// awful stipple alpha code
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#if gl_stipplealpha==1
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float alpha = USEALPHA * e_colourident.a;
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int x = int(mod(gl_FragCoord.x, 2.0));
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int y = int(mod(gl_FragCoord.y, 2.0));
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if (alpha <= 0.0) {
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discard;
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} else if (alpha <= 0.25) {
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diffuse_f.a = 1.0;
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if (x + y == 2)
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discard;
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if (x + y == 1)
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discard;
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} else if (alpha <= 0.5) {
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diffuse_f.a = 1.0;
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if (x + y == 2)
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discard;
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if (x + y == 0)
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discard;
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} else if (alpha < 1.0) {
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diffuse_f.a = 1.0;
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if (x + y == 2)
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discard;
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}
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#else
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#ifdef LIT
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diffuse_f.rgb *= (texture2D(s_lightmap, lm0) * e_lmscale).rgb;
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#endif
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#endif
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#if gl_mono==1
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float bw = (diffuse_f.r + diffuse_f.g + diffuse_f.b) / 3.0;
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diffuse_f.rgb = vec3(bw, bw, bw);
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#endif
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gl_FragColor = fog4(diffuse_f);
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}
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#endif
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