57 lines
1.4 KiB
TypeScript
57 lines
1.4 KiB
TypeScript
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/**
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* XYPadSource — the existing on-screen XY pad / joystick / manifold drag,
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* wrapped as a 2-axis InputSource.
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*
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* Push-based: the pad's `onMove(x, y)` handler calls `pushAxes(x, y)`, which
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* latches the values. `sample()` reads them back through the standard pull path
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* so the XY pad composes identically with poll-based sources (MIDI/gamepad).
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*
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* This is always available (it's an on-screen widget), so it starts `ready`.
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*/
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import { BaseSource } from './base-source';
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import type { InputSourceKind } from './types';
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export class XYPadSource extends BaseSource {
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readonly kind: InputSourceKind = 'xy-pad';
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readonly label = 'XY pad';
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private x = 0.5;
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private y = 0.5;
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constructor() {
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super({ state: 'ready', message: 'XY pad ready' });
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}
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axisCount(): number {
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return 2;
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}
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axisLabels(): string[] {
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return ['X', 'Y'];
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}
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/** Latch the latest pad position (∈ [0,1]). Called from the pad's onMove. */
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pushAxes(x: number, y: number): void {
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this.x = clamp01(x);
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this.y = clamp01(y);
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}
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sample(out: Float32Array, offset: number): number {
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out[offset] = this.x;
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out[offset + 1] = this.y;
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return 2;
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}
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start(): void {
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this.setStatus({ state: 'ready', message: 'XY pad ready' });
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}
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stop(): void {
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this.setStatus({ state: 'idle', message: 'XY pad off' });
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}
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}
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function clamp01(v: number): number {
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return v < 0 ? 0 : v > 1 ? 1 : v;
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}
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