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
72 lines
2.8 KiB
Text
72 lines
2.8 KiB
Text
// SPECTROGRAM CURTAIN — the audio texture shown almost raw, as the
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// waterfall it is: frequency across, time falling down the frame, palette
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// mapped straight onto magnitude. The honest picture of the analysis, and
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// the one to read when you want to SEE what the other presets are eating.
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//
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// The only liberties are a slow horizontal fold (so it hangs like cloth)
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// and a live edge at the top where the newest row lands.
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{
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name: "Spectrogram Curtain"
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engine: "screen"
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seed: 2
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speed: 1.0
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beat_pulse: 0.35
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beat_rate: 1.0
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bar_beats: 4
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glow: 1.0
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p0: 0.5 p1: 0.5 p2: 0.5
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dials: [
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{name: "DEPTH", bind: "p0", default: 0.5},
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{name: "FOLD", bind: "p1", default: 0.5},
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{name: "LIFT", bind: "p2", default: 0.5}
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]
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color_bg: #x03030a
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color_a: #x1b6bff
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color_b: #xff5a2b
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color_c: #xfff5d0
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stages: [
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{kind: "bloom", threshold: 0.7, strength: 0.8, 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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// FOLD: a gentle cloth wave, strongest low down.
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let fold = clamp(self.user.y, 0.0, 1.0)
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let sway = sin(uv.y * 7.0 - self.time_beat.x * 0.8) * 0.06 * fold * uv.y
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let x = clamp(uv.x + sway, 0.0, 1.0)
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// DEPTH: how many seconds of history fill the frame.
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let depth = 0.20 + 0.80 * clamp(self.user.x, 0.0, 1.0)
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let age = clamp(uv.y * depth, 0.0, 1.0)
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let v = self.audio_fft(x, age)
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// Idle weave so a silent curtain still has a fabric.
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let idle = 0.045
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+ 0.030 * sin(x * 47.0 + age * 30.0)
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+ 0.020 * sin(uv.y * 61.0 - self.time_beat.x * 0.7)
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let m = clamp(max(v, idle) * (0.7 + 1.0 * clamp(self.user.z, 0.0, 1.0)), 0.0, 1.0)
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// Three-stop ramp: dark -> cold -> hot -> white.
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let mut rgb = self.col_bg.xyz.mix(self.col_a.xyz, smoothstep(0.0, 0.45, m))
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rgb = rgb.mix(self.col_b.xyz, smoothstep(0.35, 0.80, m))
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rgb = rgb.mix(self.col_c.xyz, smoothstep(0.78, 1.0, m))
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// The live edge: the newest row, drawn hot at the top so you can
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// see the sound ARRIVE.
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let edge = exp(0.0 - uv.y * 90.0)
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let now = self.audio_fft(x, 0.0)
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rgb = rgb + self.col_c.xyz * (edge * (0.15 + 1.1 * now))
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// Vertical seams every octave-ish, so the frequency axis is
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// readable rather than a smear.
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let ticks = smoothstep(0.93, 1.0, abs(sin(x * 12.5664)))
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rgb = rgb + self.col_a.xyz * (ticks * 0.05)
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// The curtain darkens as it falls out of memory.
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rgb = rgb * (1.0 - 0.35 * uv.y * uv.y)
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return vec4(rgb * self.fog.y, 1.0)
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}
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}
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}
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