dd1b08ee21
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33 lines
1009 B
JavaScript
33 lines
1009 B
JavaScript
export function randomPointInCircle(origin, radiusPx) {
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const angle = randomUnitFloat() * Math.PI * 2;
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const distance = Math.sqrt(randomUnitFloat()) * radiusPx;
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return {
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x: origin.x + Math.cos(angle) * distance,
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y: origin.y + Math.sin(angle) * distance
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};
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}
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export function isWithinTeleportRadius(originCenter, candidateCenter, radiusPx) {
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const dx = candidateCenter.x - originCenter.x;
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const dy = candidateCenter.y - originCenter.y;
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return Math.hypot(dx, dy) <= radiusPx;
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}
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export function sceneDistanceToPixels(distance) {
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const gridSize = canvas.scene.grid.size;
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const distancePerGrid = canvas.scene.grid.distance || 5;
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return distance / distancePerGrid * gridSize;
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}
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function randomUnitFloat() {
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const cryptoApi = globalThis.crypto;
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if (!cryptoApi?.getRandomValues) {
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throw new Error("A cryptographically secure random generator is not available.");
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}
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const values = new Uint32Array(1);
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cryptoApi.getRandomValues(values);
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return values[0] / 0x100000000;
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}
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