bubbles / files / src / physics / Vector2.ts

Vector2.ts

1	export class Vector2 {
2	constructor(public x: number, public y: number) { }
3
4	static zero(): Vector2 {
5	return new Vector2(0, 0);
6	}
7
8	static from(x: number, y: number): Vector2 {
9	return new Vector2(x, y);
10	}
11
12	add(v: Vector2): Vector2 {
13	return new Vector2(this.x + v.x, this.y + v.y);
14	}
15
16	sub(v: Vector2): Vector2 {
17	return new Vector2(this.x - v.x, this.y - v.y);
18	}
19
20	scale(s: number): Vector2 {
21	return new Vector2(this.x * s, this.y * s);
22	}
23
24	dot(v: Vector2): number {
25	return this.x * v.x + this.y * v.y;
26	}
27
28	magnitude(): number {
29	return Math.sqrt(this.x * this.x + this.y * this.y);
30	}
31
32	normalize(): Vector2 {
33	const m = this.magnitude();
34	if (m === 0) return Vector2.zero();
35	return this.scale(1 / m);
36	}
37
38	clone(): Vector2 {
39	return new Vector2(this.x, this.y);
40	}
41
42	addMut(v: Vector2): this {
43	this.x += v.x;
44	this.y += v.y;
45	return this;
46	}
47
48	scaleMut(s: number): this {
49	this.x *= s;
50	this.y *= s;
51	return this;
52	}
53	}