import Raster;
	import Drawable;
	import Vertex2D;
	import FlatTri;
	
	public class SmoothTri extends FlatTri implements Drawable {
	    boolean isFlat;
	    double scale;
	    
	    public SmoothTri(Vertex2D v0, Vertex2D v1, Vertex2D v2) {
	        v = new Vertex2D[3];
	        v[0] = v0;
	        v[1] = v1;
	        v[2] = v2;
	        
	        /*
	            check if all vertices are the same color
	        */
	        isFlat = (v0.argb == v1.argb) && (v0.argb == v2.argb);

	        if (isFlat) {
	            color = v0.argb;
	        } else {
	            color = 0;
	        }
	        
	        /*
	            Scale is always non zero and positive. This zero
	            value indicates that it has not been computed yet
	        */
	        scale = -1;
	    }