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
80 lines
3.2 KiB
Text
80 lines
3.2 KiB
Text
// LEVEL PULSE RINGS — every kick that happened in the last five seconds,
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// still travelling. Radius is age, so the outermost ring is the oldest
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// hit; nothing here is spawned, tracked or decayed on the CPU — the rings
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// ARE the low-band column of the spectrogram, read along the radius.
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//
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// The classic "VU pump" without a single accumulator: the whole picture is
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// a function of (radius -> age -> texture row).
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{
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name: "Level Pulse Rings"
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engine: "screen"
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seed: 5
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speed: 1.0
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beat_pulse: 0.9
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beat_rate: 1.0
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bar_beats: 4
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glow: 1.05
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p0: 0.5 p1: 0.5 p2: 0.5
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dials: [
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{name: "REACH", bind: "p0", default: 0.5},
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{name: "BAND", bind: "p1", default: 0.5},
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{name: "EDGE", bind: "p2", default: 0.5}
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]
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color_bg: #x03040b
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color_a: #xff9a3c
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color_b: #x3ce0ff
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color_c: #xffffff
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stages: [
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{kind: "bloom", threshold: 0.55, strength: 1.25, levels: 4}
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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 aspect = 16.0 / 9.0
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let p = vec2((uv.x - 0.5) * aspect, uv.y - 0.5)
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let r = length(p)
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let ang = atan2(p.y, p.x) / 6.2831853 + 0.5
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// BAND picks which part of the spectrum drives the rings:
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// 0 = the kick, 1 = the hats.
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let f = clamp(self.user.y, 0.0, 1.0)
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// REACH turns how much history fits inside the frame.
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let reach = 0.35 + 1.6 * clamp(self.user.x, 0.0, 1.0)
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let age = clamp(r * reach, 0.0, 1.0)
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// The level that was playing when this radius left the middle.
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let lvl = self.audio_fft(f, age)
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// Idle: a slow breathing ring so a silent rig is not a void.
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let idle = 0.09 * (0.5 + 0.5 * sin(age * 26.0 - self.time_beat.x * 2.2))
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let e = max(lvl, idle)
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// A ring is bright where the level was HIGH: the shell is the
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// level itself, sharpened by EDGE.
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let sharp = 2.0 + 12.0 * clamp(self.user.z, 0.0, 1.0)
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let shell = pow(clamp(e, 0.0, 1.0), sharp)
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// Rings thin out as they travel (energy spread over a circle).
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let spread = 1.0 / (0.25 + r * 4.5)
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// A little angular texture so a ring is not a perfect circle:
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// the waveform of that same moment, wrapped around it.
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let wob = self.audio_wave(clamp(1.0 - age * 0.9, 0.0, 1.0))
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let lobed = shell * (1.0 + 0.35 * wob * sin(fract(ang) * 25.1327))
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let tint = self.col_a.xyz.mix(self.col_b.xyz, clamp(age * 1.4, 0.0, 1.0))
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let mut rgb = self.col_bg.xyz
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rgb = rgb + tint * (lobed * spread * 1.6)
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// The middle: the live level as a lamp, punched by the beat.
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let hit = 0.15 + 0.85 * self.audio_env.x
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rgb = rgb + self.col_c.xyz
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* (exp(0.0 - r * 26.0) * hit * (0.6 + 0.6 * self.time_beat.w))
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// A vignette keeps the outermost (oldest) rings from smearing
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// into the corners.
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let vig = 1.0 - 0.5 * smoothstep(0.35, 0.95, r)
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return vec4(rgb * vig * self.fog.y, 1.0)
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}
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}
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}
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