26 lines
1.1 KiB
GLSL
26 lines
1.1 KiB
GLSL
float waterH(vec3 pos) {
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float noise = 0;
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vec2 wind = vec2(frametime) * 0.25 * WATER_SPEED;
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float yFactor = 0.5;
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noise+= texture2D(noisetex,(pos.xz + wind - pos.y * yFactor) / 1024.0 * 1.1).r * 1.0;
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noise+= texture2D(noisetex,(pos.xz - wind - pos.y * yFactor) / 1024.0 * 1.5).r * 0.8;
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noise-= texture2D(noisetex,(pos.xz + wind + pos.y * yFactor) / 1024.0 * 2.5).r * 0.6;
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noise+= texture2D(noisetex,(pos.xz - wind - pos.y * yFactor) / 1024.0 * 5.0).r * 0.4;
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noise-= texture2D(noisetex,(pos.xz + wind + pos.y * yFactor) / 1024.0 * 8.0).r * 0.2;
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return noise;
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}
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float getCausticWaves(vec3 pos) {
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float deltaPos = 0.1;
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float caustic_h0 = waterH(pos);
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float caustic_h1 = waterH(pos + vec3( deltaPos, 0.0, 0.0));
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float caustic_h2 = waterH(pos + vec3(-deltaPos, 0.0, 0.0));
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float caustic_h3 = waterH(pos + vec3( 0.0, 0.0, deltaPos));
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float caustic_h4 = waterH(pos + vec3( 0.0, 0.0, -deltaPos));
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float caustic = max((1.0-abs(0.5-caustic_h0))*(1.0-(abs(caustic_h1-caustic_h2)+abs(caustic_h3-caustic_h4))),0.0);
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caustic = max(pow(caustic,3.5),0.0)*2.0;
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return caustic;
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} |