@motion-core/motion-gpu/dist/core/pointer.js

Framework-agnostic WebGPU runtime for fullscreen WGSL shaders with explicit Svelte, React, and Vue adapter entrypoints.

//#region src/lib/core/pointer.ts
/**
* Returns a monotonic timestamp in seconds.
*/
function getPointerNowSeconds() {
	if (typeof performance !== "undefined" && typeof performance.now === "function") return performance.now() / 1e3;
	return Date.now() / 1e3;
}
/**
* Creates the initial pointer state snapshot.
*/
function createInitialPointerState() {
	return {
		px: [0, 0],
		uv: [0, 0],
		ndc: [-1, -1],
		inside: false,
		pressed: false,
		dragging: false,
		pointerType: null,
		pointerId: null,
		button: null,
		buttons: 0,
		time: getPointerNowSeconds(),
		downPx: null,
		downUv: null,
		deltaPx: [0, 0],
		deltaUv: [0, 0],
		velocityPx: [0, 0],
		velocityUv: [0, 0]
	};
}
/**
* Converts client coordinates to canvas-relative pointer coordinates.
*/
function getPointerCoordinates(clientX, clientY, rect) {
	const width = Math.max(rect.width, 1);
	const height = Math.max(rect.height, 1);
	const nx = (clientX - rect.left) / width;
	const ny = (clientY - rect.top) / height;
	const pxX = clientX - rect.left;
	const pxY = clientY - rect.top;
	const uvX = nx;
	const uvY = 1 - ny;
	return {
		px: [pxX, pxY],
		uv: [uvX, uvY],
		ndc: [nx * 2 - 1, uvY * 2 - 1],
		inside: nx >= 0 && nx <= 1 && ny >= 0 && ny <= 1
	};
}
/**
* Resolves frame wake-up strategy for pointer-driven updates.
*/
function resolvePointerFrameRequestMode(mode, renderMode) {
	if (mode !== "auto") return mode;
	if (renderMode === "manual") return "advance";
	if (renderMode === "on-demand") return "invalidate";
	return "none";
}
/**
* Normalizes unknown pointer kind values to the public `PointerKind`.
*/
function normalizePointerKind(pointerType) {
	if (pointerType === "mouse" || pointerType === "pen" || pointerType === "touch") return pointerType;
	return "mouse";
}
//#endregion
export { createInitialPointerState, getPointerCoordinates, getPointerNowSeconds, normalizePointerKind, resolvePointerFrameRequestMode };

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