public class FlatTri implements Drawable {
    protected Vertex2D v[];
    protected EdgeEqn edge[];
    protected int color;
    protected int area;
    protected int xMin, xMax, yMin, yMax;
    private static byte sort[][] = {{0, 1}, {1, 2}, {0, 2}, {2, 0}, {2, 1}, {1, 0}};

    public FlatTri() {      // for future extension
    }

    public FlatTri(Vertex2D v0, Vertex2D v1, Vertex2D v2) {
        v = new Vertex2D[3];
        v[0] = v0;
        v[1] = v1;
        v[2] = v2;

        //  ... Paint triangle the average of it's vertex colors ...
        int a = ((v0.argb >> 24) & 255) + ((v1.argb >> 24) & 255) + ((v2.argb >> 24) & 255);
        int r = ((v0.argb >> 16) & 255) + ((v1.argb >> 16) & 255) + ((v2.argb >> 16) & 255);
        int g = ((v0.argb >> 8) & 255) + ((v1.argb >> 8) & 255) + ((v2.argb >> 8) & 255);
        int b = (v0.argb & 255) + (v1.argb & 255) + (v2.argb & 255);

        a = (a + a + 3) / 6;
        r = (r + r + 3) / 6;
        g = (g + g + 3) / 6;
        b = (b + b + 3) / 6;

        color = (a << 24) | (r << 16) | (g << 8) | b;
    }