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gzdoom/wadsrc/static/shaders/glsl/func_warp2.fp
2014-07-15 00:19:41 +02:00

18 lines
430 B
GLSL

uniform float timer;
vec4 ProcessTexel()
{
vec2 texCoord = vTexCoord.st;
const float pi = 3.14159265358979323846;
vec2 offset = vec2(0.0,0.0);
float siny = sin(pi * 2.0 * (texCoord.y * 2.2 + timer * 0.75)) * 0.03;
offset.y = siny + sin(pi * 2.0 * (texCoord.x * 0.75 + timer * 0.75)) * 0.03;
offset.x = siny + sin(pi * 2.0 * (texCoord.x * 1.1 + timer * 0.45)) * 0.02;
texCoord += offset;
return getTexel(texCoord);
}