public class Triangle extends Particle
{
  private float theta;
  private float rate;
  
  /**
   * Parameterized constructor expects values for position, velocity, acceleration,
   * and particle size (in that order).
   */
  public Triangle (Vector2D position, Vector2D velocity, Vector2D acceleration, float pWidth, float pHeight)
  {
    super(position, velocity, acceleration, pWidth, pHeight);
    theta = 0;
    rate = random(-0.1, 0.1);
  }
  
  /**
   * Method for rendering the triangle:
   */
  public void render ()
  {
    smooth();

    fill(0, 200, 200, 180);
    //Spinning version:
    pushMatrix();
    translate(position.getX(), position.getY());
    rotate(theta);
    triangle(-pWidth/2, -pHeight/2, pWidth/2, -pHeight/2, -pWidth/2, pHeight/2);
    theta += rate;
    popMatrix();
    
    //Non-spinning version:
    /*triangle(position.getX() - pWidth/2, position.getY() - pHeight/2,
             position.getX() + pWidth/2, position.getY() - pHeight/2,
             position.getX() - pWidth/2, position.getY() + pHeight/2);*/
  } 
  
  
}