0xrsydn/motionlab
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Go native-only: remove the Python POC, move the Swift app to the top level

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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>
This commit is contained in:
Rasyidan Akbar F. 2026-10-05 20:33:18 +07:00
commit a20d3310db
29 changed files with 160 additions and 775 deletions
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22
effects/particles.metal Normal file
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// Particles spawn where you move and drift along with the motion.
// order 30
// on
// slider brightness 0.0 3.0 1.4
// slider glow 0.0 4.0 1.5
// slider hue 0.0 1.0 0.08
// hue 0..1 -> a fully saturated colour (0 red, 0.08 orange, 0.33 green, 0.66 blue)
static float3 hueColor(float h) {
return clamp(abs(fract(h + float3(0.0, 2.0 / 3.0, 1.0 / 3.0)) * 6.0 - 3.0) - 1.0, 0.0, 1.0);
}
float4 effect(float2 uv, Inputs in) {
float core = in.particles.sample(in.smp, uv).r;
float halo = 0.0;
for (int i = 0; i < 8; i++) {
float a = 6.2832 * float(i) / 8.0;
halo += in.particles.sample(in.smp, uv + float2(cos(a), sin(a)) * 5.0 / in.resolution).r;
}
float3 tint = hueColor(in.p.hue);
float3 base = in.image.sample(in.smp, uv).rgb;
return float4(base + tint * (core * in.p.brightness + halo / 8.0 * in.p.glow), 1.0);
}