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https://github.com/Ttanasart-pt/Pixel-Composer.git
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26 lines
588 B
GLSL
26 lines
588 B
GLSL
#define TAU 6.283185307179586
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varying vec2 v_vTexcoord;
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varying vec4 v_vColour;
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uniform float strength;
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uniform vec2 center;
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uniform float radius;
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uniform float spokes;
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uniform float rotate;
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void main() {
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vec2 pos = v_vTexcoord - center;
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float rad = length(pos);
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float dist = rad * strength;
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float drad = smoothstep(radius * strength, 0., dist);
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float angle = atan(pos.y, pos.x);
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if(spokes != 0.) {
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float sp = TAU / spokes;
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angle = floor(angle / sp) * sp + sp * .5 + rotate;
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}
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gl_FragColor = vec4(cos(angle) * dist * drad, sin(angle) * dist * drad, 0., 1.);
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}
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