Function rotate

dashboard/src/lib/map.ts:8–19

(x: number, y: number, a: number, px: number, py: number)

export const rad = (deg: number) => deg * (Math.PI / 180);

export const rotate = (x: number, y: number, a: number, px: number, py: number) => {
	const c = Math.cos(rad(a));
	const s = Math.sin(rad(a));

	x -= px;
	y -= py;

	const newX = x * c - y * s;
	const newY = y * c + x * s;

	return { y: newX + px, x: newY + py };
};

export const calculateDistance = (x1: number, y1: number, x2: number, y2: number) => {
	return Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));