class TrailTriangle extends TrailShape {

  TrailTriangle(float x, float y, float dx, float dy,
  float size, float dSizePercent, color sColor) {
    super(x, y, dx, dy, size, dSizePercent, sColor);
  }

  /**
   * Draws an equilateral triangle with sides of the
   * given size, centered at (x,y).
   */
  void drawShape(float x, float y, float size)
  {
    float a = size * cos(radians(30));
    triangle(x, y - a / 2.0, x - size / 2.0, y + a / 2.0,
      x + size / 2.0, y + a / 2.0);
  }
}