--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/demo/share/jfc/J2Ddemo/java2d/demos/Colors/Rotator3D.java Mon May 14 08:58:32 2018 -0700
@@ -0,0 +1,397 @@
+/*
+ *
+ * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of Oracle nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package java2d.demos.Colors;
+
+
+import static java.lang.Math.PI;
+import static java.lang.Math.abs;
+import static java.lang.Math.cos;
+import static java.lang.Math.min;
+import static java.lang.Math.random;
+import static java.lang.Math.sin;
+import static java.lang.Math.sqrt;
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java2d.AnimatingSurface;
+
+
+/**
+ * 3D objects with color & lighting translated, rotated and scaled.
+ */
+@SuppressWarnings("serial")
+public class Rotator3D extends AnimatingSurface {
+
+ private Objects3D objs[] = new Objects3D[3];
+ private static final int[][][] polygons = {
+ // Solid cube
+ { { 5, 1, 15, 13, 21, 23, 15 },
+ { 5, 2, 21, 13, 19, 27, 21 },
+ { 5, 3, 23, 15, 17, 25, 23 },
+ { 5, 4, 19, 13, 15, 17, 19 },
+ { 5, 5, 27, 21, 23, 25, 27 },
+ { 5, 6, 27, 19, 17, 25, 27 } },
+ // Polygonal faces cube
+ { { 5, 1, 21, 13, 19, 27, 21 },
+ { 5, 5, 23, 15, 17, 25, 23 },
+ { 4, 0, 15, 14, 16, 15 }, { 7, 6, 16, 14, 13, 12, 18, 17, 16 }, { 4,
+ 0, 12, 19, 18, 12 },
+ { 4, 2, 22, 21, 20, 22 }, { 7, 0, 24, 23, 22, 20, 27, 26, 24 }, { 4,
+ 2, 24, 26, 25, 24 },
+ { 4, 3, 15, 13, 23, 15 }, { 4, 0, 23, 13, 21, 23 },
+ { 5, 0, 27, 26, 18, 19, 27 }, { 5, 4, 25, 17, 18, 26, 25 } },
+ // Octahedron
+ { { 4, 3, 18, 21, 16, 18 }, { 4, 1, 20, 16, 18, 20 },
+ { 4, 1, 18, 21, 16, 18 }, { 4, 3, 20, 17, 19, 20 },
+ { 4, 2, 20, 26, 27, 20 }, { 5, 3, 26, 18, 16, 27, 26 },
+ { 5, 0, 17, 24, 25, 19, 17 }, { 4, 3, 21, 25, 24, 21 },
+ { 4, 4, 18, 21, 22, 18 }, { 4, 2, 22, 21, 17, 22 },
+ { 4, 5, 20, 23, 16, 20 }, { 4, 1, 20, 23, 19, 20 },
+ { 4, 6, 21, 23, 16, 21 }, { 4, 4, 21, 23, 19, 21 },
+ { 4, 5, 20, 18, 22, 20 }, { 4, 6, 20, 22, 17, 20 } }
+ };
+ private static final double[][][] points = {
+ // Points for solid cube & polygonal faces cube
+ { { 1, 0, 0 }, { -1, 0, 0 }, { 0, 1, 0 }, { 0, -1, 0 }, { 0, 0, 1 },
+ { 0, 0, -1 }, { 1, 0, 0 }, { -1, 0, 0 }, { 0, 1, 0 }, { 0, -1, 0 },
+ { 0, 0, 1 }, { 0, 0, -1 }, { 1, 1, 0 }, { 1, 1, 1 }, { 0, 1, 1 },
+ { -1, 1, 1 }, { -1, 1, 0 }, { -1, 1, -1 }, { 0, 1, -1 },
+ { 1, 1, -1 },
+ { 1, -1, 0 }, { 1, -1, 1 }, { 0, -1, 1 }, { -1, -1, 1 },
+ { -1, -1, 0 },
+ { -1, -1, -1 }, { 0, -1, -1 }, { 1, -1, -1 } },
+ // Points for octahedron
+ { { 0, 0, 1 }, { 0, 0, -1 }, { -0.8165, 0.4714, 0.33333 },
+ { 0.8165, -0.4714, -0.33333 }, { 0.8165, 0.4714, 0.33333 },
+ { -0.8165, -0.4714, -0.33333 }, { 0, -0.9428, 0.3333 },
+ { 0, 0.9428, -0.33333 }, { 0, 0, 1 }, { 0, 0, -1 },
+ { -0.8165, 0.4714, 0.33333 }, { 0.8165, -0.4714, -0.33333 },
+ { 0.8165, 0.4714, 0.33333 }, { -0.8165, -0.4714, -0.33333 },
+ { 0, -0.9428, 0.33333 }, { 0, 0.9428, -0.33333 },
+ { -1.2247, -0.7071, 1 }, { 1.2247, 0.7071, -1 },
+ { 0, 1.4142, 1 }, { 0, -1.4142, -1 }, { -1.2247, 0.7071, -1 },
+ { 1.2247, -0.7071, 1 }, { 0.61237, 1.06066, 0 },
+ { -0.61237, -1.06066, 0 }, { 1.2247, 0, 0 },
+ { 0.61237, -1.06066, 0 }, { -0.61237, 1.06066, 0 },
+ { -1.2247, 0, 0 } }
+ };
+ private static final int[][][] faces = {
+ // Solid cube
+ { { 1, 1 }, { 1, 2 }, { 1, 3 }, { 1, 4 }, { 1, 0 }, { 1, 5 } },
+ // Polygonal faces cube
+ { { 1, 0 }, { 1, 1 }, { 3, 2, 3, 4 }, { 3, 5, 6, 7 }, { 2, 8, 9 }, { 2,
+ 10, 11 } },
+ // Octahedron
+ { { 1, 2 }, { 1, 3 }, { 2, 4, 5 }, { 2, 6, 7 }, { 2, 8, 9 },
+ { 2, 10, 11 }, { 2, 12, 13 }, { 2, 14, 15 } }, };
+
+ public Rotator3D() {
+ setBackground(Color.white);
+ }
+
+ @Override
+ public void reset(int w, int h) {
+ objs[0] = new Objects3D(polygons[0], points[0], faces[0], w, h);
+ objs[1] = new Objects3D(polygons[1], points[0], faces[1], w, h);
+ objs[2] = new Objects3D(polygons[2], points[1], faces[2], w, h);
+ }
+
+ @Override
+ public void step(int w, int h) {
+ for (Objects3D obj : objs) {
+ if (obj != null) {
+ obj.step(w, h);
+ }
+ }
+ }
+
+ @Override
+ public void render(int w, int h, Graphics2D g2) {
+ for (Objects3D obj : objs) {
+ if (obj != null) {
+ obj.render(g2);
+ }
+ }
+ }
+
+ public static void main(String argv[]) {
+ createDemoFrame(new Rotator3D());
+ }
+
+
+ /**
+ * 3D Objects : Solid Cube, Cube & Octahedron with polygonal faces.
+ */
+ public class Objects3D {
+
+ private final int UP = 0;
+ private final int DOWN = 1;
+ private int[][] polygons;
+ private double[][] points;
+ private int npoint;
+ private int[][] faces;
+ private int nface;
+ private int ncolour = 10;
+ private Color[][] colours = new Color[ncolour][7];
+ private double[] lightvec = { 0, 1, 1 };
+ private double Zeye = 10;
+ private double angle;
+ private Matrix3D orient, tmp, tmp2, tmp3;
+ private int scaleDirection;
+ private double scale, scaleAmt;
+ private double ix = 3.0, iy = 3.0;
+ private double[][] rotPts;
+ private int[][] scrPts;
+ private int xx[] = new int[20];
+ private int yy[] = new int[20];
+ private double x, y;
+ private int p, j;
+ private int colour;
+ private double bounce, persp;
+
+ public Objects3D(int[][] polygons,
+ double[][] points,
+ int[][] faces,
+ int w,
+ int h) {
+
+ this.polygons = polygons;
+ this.points = points;
+ this.faces = faces;
+ npoint = points.length;
+ nface = faces.length;
+
+ x = w * random();
+ y = h * random();
+
+ ix = random() > 0.5 ? ix : -ix;
+ iy = random() > 0.5 ? iy : -iy;
+
+ rotPts = new double[npoint][3];
+ scrPts = new int[npoint][2];
+
+ for (int i = 0; i < ncolour; i++) {
+ int val = 255 - (ncolour - i - 1) * 100 / ncolour;
+ Color[] c = {
+ new Color(val, val, val), // white
+ new Color(val, 0, 0), // red
+ new Color(0, val, 0), // green
+ new Color(0, 0, val), // blue
+ new Color(val, val, 0), // yellow
+ new Color(0, val, val), // cyan
+ new Color(val, 0, val) // magenta
+ };
+ colours[i] = c;
+ }
+
+ double len = sqrt(lightvec[0] * lightvec[0] + lightvec[1]
+ * lightvec[1] + lightvec[2] * lightvec[2]);
+ lightvec[0] = lightvec[0] / len;
+ lightvec[1] = lightvec[1] / len;
+ lightvec[2] = lightvec[2] / len;
+
+ double max = 0;
+ for (int i = 0; i < npoint; i++) {
+ len = sqrt(points[i][0] * points[i][0] + points[i][1]
+ * points[i][1] + points[i][2] * points[i][2]);
+ if (len > max) {
+ max = len;
+ }
+ }
+
+ for (int i = 0; i < nface; i++) {
+ len = sqrt(points[i][0] * points[i][0] + points[i][1]
+ * points[i][1] + points[i][2] * points[i][2]);
+ points[i][0] = points[i][0] / len;
+ points[i][1] = points[i][1] / len;
+ points[i][2] = points[i][2] / len;
+ }
+
+ orient = new Matrix3D();
+ tmp = new Matrix3D();
+ tmp2 = new Matrix3D();
+ tmp3 = new Matrix3D();
+ tmp.Rotation(2, 0, PI / 50);
+ CalcScrPts((double) w / 3, (double) h / 3, 0);
+
+ scale = min(w / 3 / max / 1.2, h / 3 / max / 1.2);
+ scaleAmt = scale;
+ scale *= random() * 1.5;
+ scaleDirection = scaleAmt < scale ? DOWN : UP;
+ }
+
+ private Color getColour(int f, int index) {
+ colour = (int) ((rotPts[f][0] * lightvec[0] + rotPts[f][1]
+ * lightvec[1] + rotPts[f][2] * lightvec[2]) * ncolour);
+ if (colour < 0) {
+ colour = 0;
+ }
+ if (colour > ncolour - 1) {
+ colour = ncolour - 1;
+ }
+ return colours[colour][polygons[faces[f][index]][1]];
+ }
+
+ private void CalcScrPts(double x, double y, double z) {
+ for (p = 0; p < npoint; p++) {
+
+ rotPts[p][2] = points[p][0] * orient.M[2][0]
+ + points[p][1] * orient.M[2][1]
+ + points[p][2] * orient.M[2][2];
+
+ rotPts[p][0] = points[p][0] * orient.M[0][0]
+ + points[p][1] * orient.M[0][1]
+ + points[p][2] * orient.M[0][2];
+
+ rotPts[p][1] = -points[p][0] * orient.M[1][0]
+ - points[p][1] * orient.M[1][1]
+ - points[p][2] * orient.M[1][2];
+ }
+ for (p = nface; p < npoint; p++) {
+ rotPts[p][2] += z;
+ persp = (Zeye - rotPts[p][2]) / (scale * Zeye);
+ scrPts[p][0] = (int) (rotPts[p][0] / persp + x);
+ scrPts[p][1] = (int) (rotPts[p][1] / persp + y);
+ }
+ }
+
+ private boolean faceUp(int f) {
+ return (rotPts[f][0] * rotPts[nface + f][0] + rotPts[f][1] * rotPts[nface
+ + f][1] + rotPts[f][2] * (rotPts[nface + f][2] - Zeye) < 0);
+ }
+
+ public void step(int w, int h) {
+ x += ix;
+ y += iy;
+ if (x > w - scale) {
+ x = w - scale - 1;
+ ix = -w / 100 - 1;
+ }
+ if (x - scale < 0) {
+ x = 2 + scale;
+ ix = w / 100 + random() * 3;
+ }
+ if (y > h - scale) {
+ y = h - scale - 2;
+ iy = -h / 100 - 1;
+ }
+ if (y - scale < 0) {
+ y = 2 + scale;
+ iy = h / 100 + random() * 3;
+ }
+
+ angle += random() * 0.15;
+ tmp3.Rotation(1, 2, angle);
+ tmp2.Rotation(1, 0, angle * sqrt(2) / 2);
+ tmp.Rotation(0, 2, angle * PI / 4);
+ orient.M = tmp3.Times(tmp2.Times(tmp.M));
+ bounce = abs(cos(0.5 * (angle))) * 2 - 1;
+
+ if (scale > scaleAmt * 1.4) {
+ scaleDirection = DOWN;
+ }
+ if (scale < scaleAmt * 0.4) {
+ scaleDirection = UP;
+ }
+ if (scaleDirection == UP) {
+ scale += random();
+ }
+ if (scaleDirection == DOWN) {
+ scale -= random();
+ }
+
+ CalcScrPts(x, y, bounce);
+ }
+
+ public void render(Graphics2D g2) {
+ for (int f = 0; f < nface; f++) {
+ if (faceUp(f)) {
+ for (j = 1; j < faces[f][0] + 1; j++) {
+ DrawPoly(g2, faces[f][j], getColour(f, j));
+ }
+ }
+ }
+ }
+
+ private void DrawPoly(Graphics2D g2, int poly, Color colour) {
+ for (int point = 2; point < polygons[poly][0] + 2; point++) {
+ xx[point - 2] = scrPts[polygons[poly][point]][0];
+ yy[point - 2] = scrPts[polygons[poly][point]][1];
+ }
+ g2.setColor(colour);
+ g2.fillPolygon(xx, yy, polygons[poly][0]);
+ g2.setColor(Color.black);
+ g2.drawPolygon(xx, yy, polygons[poly][0]);
+ }
+
+
+ /**
+ * A 3D matrix object.
+ */
+ public class Matrix3D {
+
+ public double[][] M = { { 1, 0, 0 },
+ { 0, 1, 0 },
+ { 0, 0, 1 } };
+ private double[][] tmp = new double[3][3];
+ private int row, col, k;
+
+ public void Rotation(int i, int j, double angle) {
+ for (row = 0; row < 3; row++) {
+ for (col = 0; col < 3; col++) {
+ if (row != col) {
+ M[row][col] = 0.0;
+ } else {
+ M[row][col] = 1.0;
+ }
+ }
+ }
+ M[i][i] = cos(angle);
+ M[j][j] = cos(angle);
+ M[i][j] = sin(angle);
+ M[j][i] = -sin(angle);
+ }
+
+ public double[][] Times(double[][] N) {
+ for (row = 0; row < 3; row++) {
+ for (col = 0; col < 3; col++) {
+ tmp[row][col] = 0.0;
+ for (k = 0; k < 3; k++) {
+ tmp[row][col] += M[row][k] * N[k][col];
+ }
+ }
+ }
+ return tmp;
+ }
+ } // End Matrix3D
+ } // End Objects3D
+} // End Rotator3D
+