25 lines
No EOL
770 B
Text
25 lines
No EOL
770 B
Text
/*
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contributors: Patricio Gonzalez Vivo
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description: Returns a heart shaped SDF
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use: heartSDF(<float2> st)
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examples:
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- https://raw.githubusercontent.com/patriciogonzalezvivo/lygia_examples/main/draw_shapes.frag
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license:
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Prosperity License - https://prosperitylicense.com/versions/3.0.0
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Patron License - https://lygia.xyz/license
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*/
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#ifndef FNC_HEARTSDF
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#define FNC_HEARTSDF
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float heartSDF(float2 st) {
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#ifdef CENTER_2D
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st -= CENTER_2D;
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#else
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st -= 0.5;
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#endif
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st -= float2(0.0, 0.3);
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float r = length(st) * 5.0;
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st = normalize(st);
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return r - ((st.y * pow(abs(st.x), 0.67)) / (st.y + 1.5) - (2.0) * st.y + 1.26);
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}
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#endif |