RectCollider.pde

class RectCollider implements Collider {
  // ----- Fields
  
  private final Vec2Int position;
  private final Vec2Int size;
  
  // ----- Constructors
  
  public RectCollider(Vec2Int position, Vec2Int size) {
    this.position = position;
    this.size = size;
  }
  
  // ----- Methods
  
  @Override
  public Vec2Int getPosition() {
    return position;
  }
  
  @Override
  public Vec2Int getSize() {
    return size;
  }
  
  @Override
  public void render() {
    fill(0, 0, 255);
    noStroke();
    rectMode(CENTER);
    
    rect(0, 0, size.x, size.y);
  }
  
  @Override
  public boolean intersects(Vec2Int point) {
    boolean meetsInX = point.x >= position.x - size.x / 2 && point.x <= position.x + size.x / 2;
    boolean meetsInY = point.y >= position.y - size.y / 2 && point.y <= position.y + size.y / 2;
    
    return meetsInX && meetsInY;
  }
  
  public boolean intersects(RectCollider other) {
    boolean meetsInX = this.position.x + this.size.x / 2 >= other.position.x - other.size.x / 2
                     && this.position.x - this.size.x / 2 <= other.position.x + other.size.x / 2;

    boolean meetsInY = this.position.y + this.size.y / 2 >= other.position.y - other.size.y / 2
                     && this.position.y - this.size.y / 2 <= other.position.y + other.size.y / 2;

    return meetsInX && meetsInY;
  }
}