53 lines
1.1 KiB
GLSL
53 lines
1.1 KiB
GLSL
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uniform sampler2D texture;
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varying vec2 textureCoords;
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uniform vec4 color;
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uniform float opacity;
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uniform float ticks;
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uniform float rt_w = 18*32;
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uniform float rt_h = 14*32;
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uniform float radius = 300.0;
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uniform float angle = 0.2;
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uniform vec2 center = vec2(8*32, 5*32);
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vec4 PostFX(sampler2D tex, vec2 uv, float time)
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{
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vec2 texSize = vec2(rt_w, rt_h);
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vec2 tc = uv * texSize;
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tc -= center;
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float dist = length(tc);
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if (dist < radius)
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{
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float percent = (radius - dist) / radius;
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float theta = percent * percent * ((int)ticks % 1000)/1000.0 * 8.0;
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float s = sin(theta);
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float c = cos(theta);
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tc = vec2(dot(tc, vec2(c, -s)), dot(tc, vec2(s, c)));
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}
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tc += center;
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vec3 color = texture2D(texture, tc / texSize).rgb;
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return vec4(color, 1.0);
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}
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void main (void)
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{
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vec2 uv = textureCoords.st;
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gl_FragColor = PostFX(texture, uv, ticks) * opacity;
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}
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/*
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uniform float opacity;
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vec4 calculatePixel();
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void main()
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{
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gl_FragColor = calculatePixel() * opacity;
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}
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varying vec2 textureCoords;
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uniform vec4 color;
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uniform sampler2D texture;
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vec4 calculatePixel() {
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return texture2D(texture, textureCoords) * color;
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}
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*/
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