0xrsydn
a20d3310db
Adds --check (compile every effect without camera or window), EFFECTS.md (the contract for writing effects) and AGENTS.md. The POC stays available at the 'poc' tag. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
13 lines
616 B
Metal
13 lines
616 B
Metal
// Folds the picture into mirrored wedges around the centre.
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// order 90
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// slider segments 2.0 16.0 6.0
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// slider spin -2.0 2.0 0.2
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float4 effect(float2 uv, Inputs in) {
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float2 shape = float2(in.resolution.x / in.resolution.y, 1.0);
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float2 c = (uv - 0.5) * shape;
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float wedge = 6.2832 / floor(in.p.segments);
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float a = atan2(c.y, c.x) + in.time * in.p.spin;
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a = abs(a - wedge * floor(a / wedge) - wedge * 0.5) - 1.5708; // fold into one mirrored wedge, pointing up
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float2 from = float2(cos(a), sin(a)) * length(c) / shape + 0.5;
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return float4(in.image.sample(in.smp, from).rgb, 1.0);
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}
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