Open source Star Ruler 2 source code!
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varying vec2 uv;
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uniform sampler2D texture;
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uniform vec4 color;
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uniform vec4 glowColor;
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uniform float selected;
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uniform float cycle;
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vec4 alphaBlend(vec4 dest, vec4 src) {
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float alpha = src.a + (dest.a * (1.0 - src.a));
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return vec4( ((src.rgb * src.a) + (dest.rgb * dest.a * (1.0 - src.a))) / alpha, alpha);
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}
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void main() {
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vec4 chn = texture2D(texture, uv);
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vec4 col = vec4(color.rgb * chn.g, color.a * chn.a);
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col.rgb = mix(col.rgb, vec3(1.0, 1.0, 1.0) * chn.g, selected * 0.5);
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float pct = abs(cycle - 0.5) + 0.5;
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col = alphaBlend(col, vec4(glowColor.rgb, sqrt(chn.b) * glowColor.a * pct * color.a));
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gl_FragColor = col;
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}
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