33 lines
955 B
Text
33 lines
955 B
Text
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// From https://www.reddit.com/r/godot/comments/12cb1t2/comment/jf1y66f/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
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shader_type canvas_item;
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render_mode blend_mix;
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uniform float radius = 4.0;
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uniform int steps = 32;
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uniform float vertex_expand = 1.0;
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mat2 rotationMatrix(float angle){
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angle *= PI / 180.0;
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float s = sin(angle);
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float c = cos(angle);
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return mat2( vec2(c, -s), vec2( s, c) );
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}
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void vertex() {
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VERTEX.x *= vertex_expand;
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VERTEX.y *= vertex_expand;
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}
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void fragment() {
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float uvx = UV.x * vertex_expand - vertex_expand/2.0 + 0.5;
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float uvy = UV.y * vertex_expand - vertex_expand/2.0 + 0.5;
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vec2 new_uv = vec2(uvx,uvy);
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vec4 col = texture(TEXTURE, new_uv);
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float angle = 360.0 / float(steps);
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for (int i = 0; i < steps; i++){
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col += texture(TEXTURE, new_uv + vec2(radius, 0.0) * rotationMatrix(angle*float(i)) * TEXTURE_PIXEL_SIZE);
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}
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col /= float(steps) + 1.0;
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COLOR = col;
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}
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