d8d5ea8b6a
Restore missing required asset/flow packages from the pinned nigig revision; retain upstream script isolation, X11 hover, and widget-core fixes. Validated makepad-widgets data feature with Rust 1.97.1.
80 lines
2.9 KiB
Text
80 lines
2.9 KiB
Text
// MURMURATION — STATEFUL GPU particles: 16k particles whose pos/vel/age
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// live in a float SIM texture (texel = particle). An update pass
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// integrates curl noise + weak centering + a beat kick every frame; the
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// draw pass's VERTEX shader fetches each particle's state by instance id
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// and stretches the sprite along its velocity. Real momentum — the swarm
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// BANKS and REMEMBERS, which no stateless closed form can do. Long `life`
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// keeps the flock persistent; feedback paints its history.
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{
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name: "Murmuration"
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engine: "simswarm"
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seed: 5
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count: 16384
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size: 0.055
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stretch: 0.05
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speed_color: 0.12
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// The state field's force program (all bindable):
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curl: 1.7
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attract: 0.4
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swirl: 0.12
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gravity: 0.0
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impulse: "(0.6 + pulse * 2.2) * (0.2 + 1.6*p0)"
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drag: 0.5
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max_speed: 7.5
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life: 120.0
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bound: 7.0
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beat_pulse: 0.3
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beat_rate: 0.5
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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: "KICK", bind: "p0", default: 0.5},
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{name: "TRAIL", bind: "p1", default: 0.5},
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{name: "GLOW", bind: "p2", default: 0.5}
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]
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color_bg: #x05070f
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color_a: #x2a4a8f
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color_b: #x6ac8ff
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color_c: #xffffff
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cam_orbit: 0.06
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glow: 1.2
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stages: [
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{kind: "feedback", amount: "min(0.75 + (p1-0.5)*0.44, 0.97)", zoom: 1.004, dim: 0.94},
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{kind: "bloom", threshold: 0.5, strength: "1.25 * (0.25 + 1.5*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 = age 0..1, attr = (id, speed, rnd, state age).
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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.DrawVjFxSimSwarmDraw {
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fx_color: fn(t: float, attr: vec4, normal: vec3, wpos: vec3) -> vec4 {
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let sp = clamp(attr.y * self.flow.y, 0.0, 1.0)
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let base = self.col_a.mix(self.col_b, sp)
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let hot = base.xyz + self.col_c.xyz * pow(sp, 3.0) * 0.6
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let fade = smoothstep(0.0, 0.06, t) * (1.0 - smoothstep(0.75, 1.0, t))
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let boost = 0.8 + self.time_beat.w * 0.9
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return vec4(hot * boost, fade)
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}
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fx_sprite: fn(uv: vec2, tint: vec4) -> vec4 {
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let d = length(uv - vec2(0.5, 0.5)) * 2.0
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let core = 1.0 - smoothstep(0.0, 0.45, d)
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let halo = 1.0 - smoothstep(0.12, 1.0, d)
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let a = clamp(core + halo * 0.55, 0.0, 1.0) * tint.w
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return vec4(tint.x * a, tint.y * a, tint.z * a, 0.0)
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}
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}
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}
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