teapot.java

Sunflow是一个照片级的渲染系统

package org.sunflow.core.tesselatable;

public class Teapot extends BezierMesh {
    // teapot data, from: http://www.cs.ucsb.edu/~cs280/winter2004/hw2/
    private static final float[][] PATCHES = {
            { -80.00f, 0.00f, 30.00f, -80.00f, -44.80f, 30.00f, -44.80f,
                    -80.00f, 30.00f, 0.00f, -80.00f, 30.00f, -80.00f, 0.00f,
                    12.00f, -80.00f, -44.80f, 12.00f, -44.80f, -80.00f, 12.00f,
                    0.00f, -80.00f, 12.00f, -60.00f, 0.00f, 3.00f, -60.00f,
                    -33.60f, 3.00f, -33.60f, -60.00f, 3.00f, 0.00f, -60.00f,
                    3.00f, -60.00f, 0.00f, 0.00f, -60.00f, -33.60f, 0.00f,
                    -33.60f, -60.00f, 0.00f, 0.00f, -60.00f, 0.00f, },
            { 0.00f, -80.00f, 30.00f, 44.80f, -80.00f, 30.00f, 80.00f, -44.80f,
                    30.00f, 80.00f, 0.00f, 30.00f, 0.00f, -80.00f, 12.00f,
                    44.80f, -80.00f, 12.00f, 80.00f, -44.80f, 12.00f, 80.00f,
                    0.00f, 12.00f, 0.00f, -60.00f, 3.00f, 33.60f, -60.00f,
                    3.00f, 60.00f, -33.60f, 3.00f, 60.00f, 0.00f, 3.00f, 0.00f,
                    -60.00f, 0.00f, 33.60f, -60.00f, 0.00f, 60.00f, -33.60f,
                    0.00f, 60.00f, 0.00f, 0.00f, },
            { -60.00f, 0.00f, 90.00f, -60.00f, -33.60f, 90.00f, -33.60f,
                    -60.00f, 90.00f, 0.00f, -60.00f, 90.00f, -70.00f, 0.00f,
                    69.00f, -70.00f, -39.20f, 69.00f, -39.20f, -70.00f, 69.00f,
                    0.00f, -70.00f, 69.00f, -80.00f, 0.00f, 48.00f, -80.00f,
                    -44.80f, 48.00f, -44.80f, -80.00f, 48.00f, 0.00f, -80.00f,
                    48.00f, -80.00f, 0.00f, 30.00f, -80.00f, -44.80f, 30.00f,
                    -44.80f, -80.00f, 30.00f, 0.00f, -80.00f, 30.00f, },
            { 0.00f, -60.00f, 90.00f, 33.60f, -60.00f, 90.00f, 60.00f, -33.60f,
                    90.00f, 60.00f, 0.00f, 90.00f, 0.00f, -70.00f, 69.00f,
                    39.20f, -70.00f, 69.00f, 70.00f, -39.20f, 69.00f, 70.00f,
                    0.00f, 69.00f, 0.00f, -80.00f, 48.00f, 44.80f, -80.00f,
                    48.00f, 80.00f, -44.80f, 48.00f, 80.00f, 0.00f, 48.00f,
                    0.00f, -80.00f, 30.00f, 44.80f, -80.00f, 30.00f, 80.00f,
                    -44.80f, 30.00f, 80.00f, 0.00f, 30.00f, },
            { -56.00f, 0.00f, 90.00f, -56.00f, -31.36f, 90.00f, -31.36f,
                    -56.00f, 90.00f, 0.00f, -56.00f, 90.00f, -53.50f, 0.00f,
                    95.25f, -53.50f, -29.96f, 95.25f, -29.96f, -53.50f, 95.25f,
                    0.00f, -53.50f, 95.25f, -57.50f, 0.00f, 95.25f, -57.50f,
                    -32.20f, 95.25f, -32.20f, -57.50f, 95.25f, 0.00f, -57.50f,
                    95.25f, -60.00f, 0.00f, 90.00f, -60.00f, -33.60f, 90.00f,
                    -33.60f, -60.00f, 90.00f, 0.00f, -60.00f, 90.00f, },
            { 0.00f, -56.00f, 90.00f, 31.36f, -56.00f, 90.00f, 56.00f, -31.36f,
                    90.00f, 56.00f, 0.00f, 90.00f, 0.00f, -53.50f, 95.25f,
                    29.96f, -53.50f, 95.25f, 53.50f, -29.96f, 95.25f, 53.50f,
                    0.00f, 95.25f, 0.00f, -57.50f, 95.25f, 32.20f, -57.50f,
                    95.25f, 57.50f, -32.20f, 95.25f, 57.50f, 0.00f, 95.25f,
                    0.00f, -60.00f, 90.00f, 33.60f, -60.00f, 90.00f, 60.00f,
                    -33.60f, 90.00f, 60.00f, 0.00f, 90.00f, },
            { 80.00f, 0.00f, 30.00f, 80.00f, 44.80f, 30.00f, 44.80f, 80.00f,
                    30.00f, 0.00f, 80.00f, 30.00f, 80.00f, 0.00f, 12.00f,
                    80.00f, 44.80f, 12.00f, 44.80f, 80.00f, 12.00f, 0.00f,
                    80.00f, 12.00f, 60.00f, 0.00f, 3.00f, 60.00f, 33.60f,
                    3.00f, 33.60f, 60.00f, 3.00f, 0.00f, 60.00f, 3.00f, 60.00f,
                    0.00f, 0.00f, 60.00f, 33.60f, 0.00f, 33.60f, 60.00f, 0.00f,
                    0.00f, 60.00f, 0.00f, },
            { 0.00f, 80.00f, 30.00f, -44.80f, 80.00f, 30.00f, -80.00f, 44.80f,
                    30.00f, -80.00f, 0.00f, 30.00f, 0.00f, 80.00f, 12.00f,
                    -44.80f, 80.00f, 12.00f, -80.00f, 44.80f, 12.00f, -80.00f,
                    0.00f, 12.00f, 0.00f, 60.00f, 3.00f, -33.60f, 60.00f,
                    3.00f, -60.00f, 33.60f, 3.00f, -60.00f, 0.00f, 3.00f,
                    0.00f, 60.00f, 0.00f, -33.60f, 60.00f, 0.00f, -60.00f,
                    33.60f, 0.00f, -60.00f, 0.00f, 0.00f, },
            { 60.00f, 0.00f, 90.00f, 60.00f, 33.60f, 90.00f, 33.60f, 60.00f,
                    90.00f, 0.00f, 60.00f, 90.00f, 70.00f, 0.00f, 69.00f,
                    70.00f, 39.20f, 69.00f, 39.20f, 70.00f, 69.00f, 0.00f,
                    70.00f, 69.00f, 80.00f, 0.00f, 48.00f, 80.00f, 44.80f,
                    48.00f, 44.80f, 80.00f, 48.00f, 0.00f, 80.00f, 48.00f,
                    80.00f, 0.00f, 30.00f, 80.00f, 44.80f, 30.00f, 44.80f,
                    80.00f, 30.00f, 0.00f, 80.00f, 30.00f, },
            { 0.00f, 60.00f, 90.00f, -33.60f, 60.00f, 90.00f, -60.00f, 33.60f,
                    90.00f, -60.00f, 0.00f, 90.00f, 0.00f, 70.00f, 69.00f,
                    -39.20f, 70.00f, 69.00f, -70.00f, 39.20f, 69.00f, -70.00f,
                    0.00f, 69.00f, 0.00f, 80.00f, 48.00f, -44.80f, 80.00f,
                    48.00f, -80.00f, 44.80f, 48.00f, -80.00f, 0.00f, 48.00f,
                    0.00f, 80.00f, 30.00f, -44.80f, 80.00f, 30.00f, -80.00f,
                    44.80f, 30.00f, -80.00f, 0.00f, 30.00f, },
            { 56.00f, 0.00f, 90.00f, 56.00f, 31.36f, 90.00f, 31.36f, 56.00f,
                    90.00f, 0.00f, 56.00f, 90.00f, 53.50f, 0.00f, 95.25f,
                    53.50f, 29.96f, 95.25f, 29.96f, 53.50f, 95.25f, 0.00f,
                    53.50f, 95.25f, 57.50f, 0.00f, 95.25f, 57.50f, 32.20f,
                    95.25f, 32.20f, 57.50f, 95.25f, 0.00f, 57.50f, 95.25f,
                    60.00f, 0.00f, 90.00f, 60.00f, 33.60f, 90.00f, 33.60f,
                    60.00f, 90.00f, 0.00f, 60.00f, 90.00f, },
            { 0.00f, 56.00f, 90.00f, -31.36f, 56.00f, 90.00f, -56.00f, 31.36f,
                    90.00f, -56.00f, 0.00f, 90.00f, 0.00f, 53.50f, 95.25f,
                    -29.96f, 53.50f, 95.25f, -53.50f, 29.96f, 95.25f, -53.50f,
                    0.00f, 95.25f, 0.00f, 57.50f, 95.25f, -32.20f, 57.50f,
                    95.25f, -57.50f, 32.20f, 95.25f, -57.50f, 0.00f, 95.25f,
                    0.00f, 60.00f, 90.00f, -33.60f, 60.00f, 90.00f, -60.00f,
                    33.60f, 90.00f, -60.00f, 0.00f, 90.00f, },
            { -64.00f, 0.00f, 75.00f, -64.00f, 12.00f, 75.00f, -60.00f, 12.00f,
                    84.00f, -60.00f, 0.00f, 84.00f, -92.00f, 0.00f, 75.00f,
                    -92.00f, 12.00f, 75.00f, -100.00f, 12.00f, 84.00f,
                    -100.00f, 0.00f, 84.00f, -108.00f, 0.00f, 75.00f, -108.00f,
                    12.00f, 75.00f, -120.00f, 12.00f, 84.00f, -120.00f, 0.00f,
                    84.00f, -108.00f, 0.00f, 66.00f, -108.00f, 12.00f, 66.00f,
                    -120.00f, 12.00f, 66.00f, -120.00f, 0.00f, 66.00f, },
            { -60.00f, 0.00f, 84.00f, -60.00f, -12.00f, 84.00f, -64.00f,
                    -12.00f, 75.00f, -64.00f, 0.00f, 75.00f, -100.00f, 0.00f,
                    84.00f, -100.00f, -12.00f, 84.00f, -92.00f, -12.00f,
                    75.00f, -92.00f, 0.00f, 75.00f, -120.00f, 0.00f, 84.00f,
                    -120.00f, -12.00f, 84.00f, -108.00f, -12.00f, 75.00f,
                    -108.00f, 0.00f, 75.00f, -120.00f, 0.00f, 66.00f, -120.00f,
                    -12.00f, 66.00f, -108.00f, -12.00f, 66.00f, -108.00f,
                    0.00f, 66.00f, },
            { -108.00f, 0.00f, 66.00f, -108.00f, 12.00f, 66.00f, -120.00f,
                    12.00f, 66.00f, -120.00f, 0.00f, 66.00f, -108.00f, 0.00f,
                    57.00f, -108.00f, 12.00f, 57.00f, -120.00f, 12.00f, 48.00f,
                    -120.00f, 0.00f, 48.00f, -100.00f, 0.00f, 39.00f, -100.00f,
                    12.00f, 39.00f, -106.00f, 12.00f, 31.50f, -106.00f, 0.00f,
                    31.50f, -80.00f, 0.00f, 30.00f, -80.00f, 12.00f, 30.00f,
                    -76.00f, 12.00f, 18.00f, -76.00f, 0.00f, 18.00f, },
            { -120.00f, 0.00f, 66.00f, -120.00f, -12.00f, 66.00f, -108.00f,
                    -12.00f, 66.00f, -108.00f, 0.00f, 66.00f, -120.00f, 0.00f,
                    48.00f, -120.00f, -12.00f, 48.00f, -108.00f, -12.00f,
                    57.00f, -108.00f, 0.00f, 57.00f, -106.00f, 0.00f, 31.50f,
                    -106.00f, -12.00f, 31.50f, -100.00f, -12.00f, 39.00f,
                    -100.00f, 0.00f, 39.00f, -76.00f, 0.00f, 18.00f, -76.00f,
                    -12.00f, 18.00f, -80.00f, -12.00f, 30.00f, -80.00f, 0.00f,