public abstract class TriangleDrawer {

  protected Vertex2D v0, v1, v2;

  public TriangleDrawer(Vertex2D v0, 
			Vertex2D v1, Vertex2D v2) {
    this.v0 = v0;
    this.v1 = v1;
    this.v2 = v2;
  }

  public abstract void draw(Raster r);

}