static/src/vector.ts


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export class Vec2 {
  constructor(
    private readonly x: number,
    private readonly y: number,
  ) {}

  public distance_to(that: Vec2): number {
    return Math.sqrt((this.x - that.x) ** 2 + (this.y - that.y) ** 2);
  }

  public copy(): Vec2 {
    return new Vec2(this.x, this.y);
  }
}