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
38 lines
1.4 KiB
Text
38 lines
1.4 KiB
Text
// ZIGZAG TWIRL — a normal centre twirl, but the sampled radius rides a
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// travelling triangle wave first, so the swirl arms come out jagged.
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{
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name: "Zigzag Twirl"
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engine: "screen"
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input0: "test"
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p0: 0.5 p1: 0.5 p2: 0.5
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dials: [
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{name: "SPIN", bind: "p0", default: 0.5},
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{name: "ZIGS", bind: "p1", default: 0.5},
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{name: "DEPTH", bind: "p2", default: 0.5}
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]
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stages: [
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{kind: "bloom", threshold: 0.6, strength: 1.05, levels: 2}
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]
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shader: draw.DrawVjFxScreen {
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fx_color: fn(uv: vec2, content: vec4, cmix: float) -> vec4 {
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let center = vec2(0.5, 0.5)
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let d = uv - center
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let r = length(d)
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let ang0 = atan2(d.y, d.x)
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let reach = 0.5
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let falloff = clamp(1.0 - r / reach, 0.0, 1.0)
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let spin = falloff * falloff * (4.0 + 9.0 * self.user.x) * (0.6 + 0.4 * self.time_beat.w)
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let zfreq = 6.0 + 26.0 * self.user.y
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let tri = abs(fract(r * zfreq - fract(self.time_beat.y * 0.1)) - 0.5) * 2.0
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let zig = (tri - 0.5) * 0.05 * self.user.z * falloff
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let newr = clamp(r + zig, 0.0, 0.75)
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let ang = ang0 + spin
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let w = center + vec2(cos(ang), sin(ang)) * newr
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let tex = self.tex0.sample_as_bgra(clamp(w, vec2(0.0, 0.0), vec2(1.0, 1.0)))
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return vec4(tex.xyz, 1.0)
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}
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}
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}
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