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
95 lines
3.6 KiB
Text
95 lines
3.6 KiB
Text
// VIDEO TORUS — the same drape wrapped on a plain ring instead of a knot:
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// a fat doughnut of video flown from the inside, so the clip comes round
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// again every lap. Steady, hypnotic, and it never surprises you — which is
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// what makes it the one you can leave up.
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//
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// Pattern taught here: the knot winding numbers make the SHAPE, and (1, 0)
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// is a circle. Nothing else about the family changes: `major` is the ring's
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// radius, `tube` the bore, and the drape hook does not care which curve it
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// is papering.
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{
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name: "Video Torus"
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engine: "tunnel"
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seed: 11
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knot_p: 1.0
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knot_q: 0.0
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major: 6.2
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tube: 2.3
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rings: 640
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sides: 30
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fly: 1.5
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bands: 48.0
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input0: "test"
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content: 1.0
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speed: 1.0
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beat_pulse: 0.5
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beat_rate: 1.0
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bar_beats: 4
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// PERFORMANCE DIALS — mid-knob = the stock look, exact.
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p0: 0.5 p1: 0.5 p2: 0.5
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dials: [
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{name: "COPIES", bind: "p0", default: 0.5},
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{name: "GAIN", bind: "p1", default: 0.5},
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{name: "BLOOM", bind: "p2", default: 0.5}
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]
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color_bg: #x050208
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color_a: #xffa8d8
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color_b: #x50208a
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color_c: #xffd0ee
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fog: 0.045
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glow: 1.0
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stages: [
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{kind: "bloom", threshold: 0.84, strength: "0.35 + 0.8*p2", levels: 3}
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]
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// THE LOOK LIVES HERE. This block is not a reference to the
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// engine's shader — it IS the pixel math this effect runs.
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// Rewrite it and the effect looks different; everything else
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// (geometry, motion, the content coupling, the beat) keeps
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// working, because the block SUBCLASSES the engine shader.
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// Inputs: t = along the bore 0..1, attr = (around, along, ring hash,
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// radius), content = the wall texel, cmix = the pre-gated content
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// strength. `fx_color` runs in the VERTEX stage, `fx_wall` in the pixel
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// stage — a fn called from one may never be called from the other.
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// Signals: self.time_beat (time, beat, phase, pulse),
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// self.sig (bar, bpm, energy, dt), self.user (p0..p3),
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// self.col_a/b/c/bg, self.fog (density, glow, content, -).
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shader: draw.DrawVjFxTunnel {
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// The engine hands over a uv already scrolled with the flight; this
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// drape re-tiles it (COPIES) and mirrors BOTH ways, so the ring is
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// a seamless kaleidoscopic band whichever way you look along it.
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fx_wall: fn(uv: vec2, content: vec4, cmix: float, ring: float) -> vec3 {
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let copies = floor(1.0 + 3.0 * clamp(self.user.x, 0.0, 1.0) + 0.5)
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let tu = fract(uv.x * copies)
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let mu = vec2(
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1.0 - abs(tu * 2.0 - 1.0),
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1.0 - abs(uv.y * 2.0 - 1.0)
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)
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let texel = self.tex0.sample_as_bgra(mu)
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let gain = (0.2 + 1.6 * clamp(self.user.y, 0.0, 1.0))
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* (1.0 + 0.22 * self.time_beat.w)
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let lum = clamp(dot(texel.xyz, vec3(0.299, 0.587, 0.114)), 0.0, 1.0)
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// A soft seam glow at every tile boundary ties the copies
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// together instead of letting them look like a torn strip.
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let seam = pow(1.0 - min(tu, 1.0 - tu) * 2.0, 12.0)
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return texel.xyz * gain
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+ self.col_a.xyz * seam * 0.12
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+ self.col_c.xyz * ring * (0.06 + 0.22 * lum)
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}
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fx_color: fn(t: float, attr: vec4, normal: vec3, wpos: vec3,
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content: vec4, cmix: float) -> vec4 {
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// Bore-position gradient, warmed toward the clip's own colour.
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let base = self.col_a.mix(self.col_b, t)
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let tint = vec4(content.x, content.y, content.z, 1.0)
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return base.mix(tint, clamp(cmix, 0.0, 1.0) * 0.35)
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}
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}
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}
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