cb49b032df
Squashed from work; the fine-grained history is under tag archive/work-2026-08-26: - vjfx: 104 new presets — the transition lane fills out and the screen family goes wide - vjfx: three lanes land — engine hooks + hold stage, the videomesh engine, and the audio picture - vj: the thumbnail pipeline becomes one honest machine, and effects go livecodable - vj: thumbnails become mp4 — hardware-coded sheets at measured-4K cells, and the bake stops racing the GPU - store: the ceremony dies — batch publish, one transaction, and the engine stops re-reading its own log - store: the ceremony dies — batch publish, one transaction, and the engine stops re-reading its own log - vj: the console grows real transports, and the deck stops lying about reverse - vj: reverse earns a memory, and the effects stop aging - fab: a 3D creation shell and the viewer built on it
47 lines
1.7 KiB
Text
47 lines
1.7 KiB
Text
// COLOUR KEY — deck B replaces deck A wherever B is near a chosen KEY
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// COLOUR, matched by straight RGB distance rather than hue alone (the
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// hue-only match is Chroma Key at 108 — this one also weighs brightness
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// and saturation, so a dim or washed-out pixel near the same hue is left
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// alone). HUE picks the key colour, TOL the RGB-distance tolerance, SOFT
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// the matte edge.
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{
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name: "Colour Key"
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engine: "transition"
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engage: "ramp"
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dials: [
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{name: "HUE", bind: "p0", default: 0.33},
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{name: "TOL", bind: "p1", default: 0.35},
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{name: "SOFT", bind: "p2", default: 0.2}
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]
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shader: draw.DrawVjFxDuo {
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key_rgb: fn(h: float) -> vec3 {
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let hh = fract(h) * 6.0
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let x = 1.0 - abs(modf(hh, 2.0) - 1.0)
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let mut c = vec3(1.0, 0.0, 0.0)
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if hh < 1.0 {
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c = vec3(1.0, x, 0.0)
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} else if hh < 2.0 {
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c = vec3(x, 1.0, 0.0)
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} else if hh < 3.0 {
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c = vec3(0.0, 1.0, x)
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} else if hh < 4.0 {
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c = vec3(0.0, x, 1.0)
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} else if hh < 5.0 {
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c = vec3(x, 0.0, 1.0)
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} else {
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c = vec3(1.0, 0.0, x)
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}
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return c
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}
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trans: fn(uv: vec2, t: float) -> vec4 {
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let a = self.deck_a(uv)
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let b = self.deck_b(uv)
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let target = self.key_rgb(self.user.x)
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let dist = length(b.xyz - target)
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let tol = 0.05 + self.user.y * 0.7
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let soft = 0.01 + self.user.z * 0.25
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let matte = smoothstep(tol - soft, tol + soft, dist)
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return a.mix(b, matte * t)
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}
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}
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}
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