advent22/ui/src/components/rects/rectangles.ts

export class Vector2D {
  public readonly x: number;
  public readonly y: number;

  constructor(x = 0, y = 0) {
    this.x = x;
    this.y = y;
  }

  public plus(other: Vector2D): Vector2D {
    return new Vector2D(this.x + other.x, this.y + other.y);
  }

  public minus(other: Vector2D): Vector2D {
    return new Vector2D(this.x - other.x, this.y - other.y);
  }

  public scale(other: number): Vector2D {
    return new Vector2D(this.x * other, this.y * other);
  }
}

export class Rectangle {
  private readonly corner_1: Vector2D;
  private readonly corner_2: Vector2D;

  constructor(corner_1: Vector2D, corner_2: Vector2D) {
    this.corner_1 = corner_1;
    this.corner_2 = corner_2;
  }

  public get origin(): Vector2D {
    return new Vector2D(
      Math.min(this.corner_1.x, this.corner_2.x),
      Math.min(this.corner_1.y, this.corner_2.y),
    )
  }

  public get left(): number {
    return this.origin.x;
  }

  public get top(): number {
    return this.origin.y;
  }

  public get corner(): Vector2D {
    return new Vector2D(
      Math.max(this.corner_1.x, this.corner_2.x),
      Math.max(this.corner_1.y, this.corner_2.y),
    )
  }

  public get size(): Vector2D {
    return this.corner.minus(this.origin);
  }

  public get width(): number {
    return this.size.x;
  }

  public get height(): number {
    return this.size.y;
  }

  public get area(): number {
    return this.width * this.height;
  }

  public contains(point: Vector2D): boolean {
    return point.x >= this.origin.x &&
      point.y >= this.origin.y &&
      point.x <= this.corner.x &&
      point.y <= this.corner.y
  }
}