so://phie

game-engine

A lightweight JavaScript game engine
git clone git://soophie.de/game-engine

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branch:main tag:v0.1

• std/js/collision.js [new file] [old file]

  13
  14export function collideRectAndCircle(a, b) {
  15	const [rect, circle] = a instanceof Shape.Rect ? [a, b] : [b, a];
  16	const dx = Math.abs(circle.x - rect.x);
  17	const dy = Math.abs(circle.y - rect.y);
  18	if(dx > rect.shape.width / 2 + circle.radius) {
  19		return false;
  16	let x = circle.x;
  17	let y = circle.y;
  18	if(circle.x < rect.x) {
  19		x = rect.x;
  20	}
  21	if(dy > rect.shape.height / 2 + circle.radius) {
  22		return false;
  21	else if(circle.x > rect.x + rect.shape.width) {
  22		x = rect.x + rect.shape.width;
  23	}
  24	if(dx < rect.shape.width / 2) {
  25		return true;
  24	if(circle.y < rect.y) {
  25		y = rect.y;
  26	}
  27	if(dy < rect.shape.height / 2) {
  28		return true;
  27	else if(circle.y > rect.y + rect.shape.height) {
  28		y = rect.y + rect.shape.height;
  29	}
  30	return (dx - rect.shape.width / 2) ** 2 + (dy - rect.shape.height / 2) ** 2 < circle.radius ** 2;
  30	const distance = Math.sqrt((circle.x - x) ** 2 + (circle.y - y) ** 2);
  31	return distance <= circle.shape.radius;
  32}
  33
  34export function collidePoint(object, point) {