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.
29 lines
1.3 KiB
Text
29 lines
1.3 KiB
Text
// DISSOLVE — the plain crossfade as a TRANSITION DOC. Pattern taught: the
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// two-deck `transition` engine. The host binds deck A/B into input 0/1 and
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// sweeps p3 with the crossfader; the default `trans` hook of
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// draw.DrawVjFxDuo IS a dissolve. The hook below reproduces it EXACTLY at
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// the dial defaults and adds the mixer-desk levers: CURVE bends the fade
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// law (fast-in vs fast-out), DIP ducks through black mid-fade, FLASH
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// lifts to white mid-fade.
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{
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name: "Crossfade"
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engine: "transition"
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p0: 0.5
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dials: [
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{name: "CURVE", bind: "p0", default: 0.5},
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{name: "DIP", bind: "p1", default: 0.0},
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{name: "FLASH", bind: "p2", default: 0.0}
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]
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shader: draw.DrawVjFxDuo {
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trans: fn(uv: vec2, t: float) -> vec4 {
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// CURVE: exponent 0.25..4, exactly 1 (a plain mix) at 0.5.
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let tt = pow(clamp(t, 0.0, 1.0), pow(4.0, self.user.x * 2.0 - 1.0))
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let c = self.deck_a(uv).mix(self.deck_b(uv), tt)
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// Mid-fade envelope: 0 at the ends, 1 in the middle.
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let mid = 4.0 * tt * (1.0 - tt)
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let dim = 1.0 - mid * self.user.y * 0.9
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let flash = mid * self.user.z * 0.8
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return vec4(c.xyz * dim + vec3(1.0, 1.0, 1.0) * flash, 1.0)
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}
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}
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}
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