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-rw-r--r--src/demos/tess/Tess.java243
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-/*
- * Portions Copyright (C) 2003 Sun Microsystems, Inc.
- * All rights reserved.
- */
-
-/*
- * Copyright (c) 1993-1999, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED
- * Permission to use, copy, modify, and distribute this software for
- * any purpose and without fee is hereby granted, provided that the above
- * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that
- * the name of Silicon Graphics, Inc. not be used in advertising
- * or publicity pertaining to distribution of the software without specific,
- * written prior permission.
- *
- * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
- * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
- * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
- * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
- * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
- * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
- * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
- * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
- * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
- * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * US Government Users Restricted Rights
- * Use, duplication, or disclosure by the Government is subject to
- * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
- * (c)(1)(ii) of the Rights in Technical Data and Computer Software
- * clause at DFARS 252.227-7013 and/or in similar or successor
- * clauses in the FAR or the DOD or NASA FAR Supplement.
- * Unpublished-- rights reserved under the copyright laws of the
- * United States. Contractor/manufacturer is Silicon Graphics,
- * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
- *
- * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
- */
-
-package demos.tess;
-
-/**
- * tess.java
- * This program demonstrates polygon tessellation.
- * Two tesselated objects are drawn. The first is a
- * rectangle with a triangular hole. The second is a
- * smooth shaded, self-intersecting star.
- *
- * Note the exterior rectangle is drawn with its vertices
- * in counter-clockwise order, but its interior clockwise.
- * Note the combineCallback is needed for the self-intersecting
- * star. Also note that removing the TessProperty for the
- * star will make the interior unshaded (WINDING_ODD).
- *
- * @author Ported by Nathan Parker Burg, July 2003
- */
-
-import javax.media.opengl.*;
-import javax.media.opengl.glu.*;
-import com.sun.opengl.util.*;
-
-import java.awt.*;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-
-public class Tess {
- public static void main(String[] args) {
- try {
- Frame frame = new Frame("Tess Demo");
- frame.setSize(500, 500);
-
- GLCanvas canvas = new GLCanvas();
- frame.add(canvas);
- canvas.addGLEventListener(new TessRenderer());
-
- frame.addWindowListener(new WindowAdapter() {
- public void windowClosing(WindowEvent e) {
- // Run this on another thread than the AWT event queue to
- // avoid deadlocks on shutdown on some platforms
- new Thread(new Runnable() {
- public void run() {
- System.exit(0);
- }
- }).start();
- }
- });
- frame.show();
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
-
- public static class TessRenderer implements GLEventListener {
- private GL gl;
- private GLU glu = new GLU();
- private int startList;
-
- public void init(GLAutoDrawable drawable) {
- drawable.setGL(new DebugGL(drawable.getGL()));
-
- gl = drawable.getGL();
-
- double[][] rect = new double[][]{{50.0, 50.0, 0.0},
- {200.0, 50.0, 0.0},
- {200.0, 200.0, 0.0},
- {50.0, 200.0, 0.0}};
- double[][] tri = new double[][]{{75.0, 75.0, 0.0},
- {125.0, 175.0, 0.0},
- {175.0, 75.0, 0.0}};
- double[][] star = new double[][]{{250.0, 50.0, 0.0, 1.0, 0.0, 1.0},
- {325.0, 200.0, 0.0, 1.0, 1.0, 0.0},
- {400.0, 50.0, 0.0, 0.0, 1.0, 1.0},
- {250.0, 150.0, 0.0, 1.0, 0.0, 0.0},
- {400.0, 150.0, 0.0, 0.0, 1.0, 0.0}};
-
- gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
-
- startList = gl.glGenLists(2);
- GLUtessellator tobj = glu.gluNewTess();
-
- TessCallback tessCallback = new TessCallback(gl, glu);
-
- glu.gluTessCallback(tobj, GLU.GLU_TESS_VERTEX, tessCallback);
- glu.gluTessCallback(tobj, GLU.GLU_TESS_BEGIN, tessCallback);
- glu.gluTessCallback(tobj, GLU.GLU_TESS_END, tessCallback);
- glu.gluTessCallback(tobj, GLU.GLU_TESS_ERROR, tessCallback);
-
- gl.glNewList(startList, GL.GL_COMPILE);
- gl.glShadeModel(GL.GL_FLAT);
- glu.gluTessBeginPolygon(tobj, null);
- glu.gluTessBeginContour(tobj);
- glu.gluTessVertex(tobj, rect[0], 0, rect[0]);
- glu.gluTessVertex(tobj, rect[1], 0, rect[1]);
- glu.gluTessVertex(tobj, rect[2], 0, rect[2]);
- glu.gluTessVertex(tobj, rect[3], 0, rect[3]);
- glu.gluTessEndContour(tobj);
- glu.gluTessBeginContour(tobj);
- glu.gluTessVertex(tobj, tri[0], 0, tri[0]);
- glu.gluTessVertex(tobj, tri[1], 0, tri[1]);
- glu.gluTessVertex(tobj, tri[2], 0, tri[2]);
- glu.gluTessEndContour(tobj);
- glu.gluTessEndPolygon(tobj);
- gl.glEndList();
-
- glu.gluTessCallback(tobj, GLU.GLU_TESS_VERTEX, tessCallback);
- glu.gluTessCallback(tobj, GLU.GLU_TESS_BEGIN, tessCallback);
- glu.gluTessCallback(tobj, GLU.GLU_TESS_END, tessCallback);
- glu.gluTessCallback(tobj, GLU.GLU_TESS_ERROR, tessCallback);
- glu.gluTessCallback(tobj, GLU.GLU_TESS_COMBINE, tessCallback);
-
- gl.glNewList(startList + 1, GL.GL_COMPILE);
- gl.glShadeModel(GL.GL_SMOOTH);
- glu.gluTessProperty(tobj, GLU.GLU_TESS_WINDING_RULE, GLU.GLU_TESS_WINDING_POSITIVE);
- glu.gluTessBeginPolygon(tobj, null);
- glu.gluTessBeginContour(tobj);
- glu.gluTessVertex(tobj, star[0], 0, star[0]);
- glu.gluTessVertex(tobj, star[1], 0, star[1]);
- glu.gluTessVertex(tobj, star[2], 0, star[2]);
- glu.gluTessVertex(tobj, star[3], 0, star[3]);
- glu.gluTessVertex(tobj, star[4], 0, star[4]);
- glu.gluTessEndContour(tobj);
- glu.gluTessEndPolygon(tobj);
- gl.glEndList();
- glu.gluDeleteTess(tobj);
- }//end init
-
-
- public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
- gl.glMatrixMode(GL.GL_PROJECTION);
- gl.glLoadIdentity();
- gl.glOrtho( 0, 450, 0, 250, -1, 1 );
- gl.glMatrixMode(GL.GL_MODELVIEW);
- gl.glLoadIdentity();
- }
-
- public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {
- }
-
- public void display(GLAutoDrawable drawable) {
- gl.glClear(GL.GL_COLOR_BUFFER_BIT);
- gl.glColor3d(1.0, 1.0, 1.0);
- gl.glCallList(startList);
- gl.glCallList(startList + 1);
-
- gl.glFlush();
- }
- }//end TessRenderer
-
-
- public static class TessCallback extends javax.media.opengl.glu.GLUtessellatorCallbackAdapter {
- GL gl;
- GLU glu;
-
- public TessCallback(GL gl, GLU glu) {
- this.gl = gl;
- this.glu = glu;
- };
- public void begin(int type) {
- gl.glBegin(type);
- }
-
- public void end() {
- gl.glEnd();
- }
-
- public void vertex(Object data) {
- if (data instanceof double[]) {
- double[] d = (double[]) data;
- if (d.length == 6) {
- gl.glColor3dv(d, 3);
- }
- gl.glVertex3dv(d, 0);
- }
- }
-
- public void error(int errnum) {
- String estring;
- estring = glu.gluErrorString(errnum);
- System.out.println("Tessellation Error: " + estring);
- //System.exit(0);
- throw new RuntimeException();
- }
-
- public void combine(double[] coords, Object[] data,
- float[] weight, Object[] outData) {
- double[] vertex = new double[6];
-
- int i;
- vertex[0] = coords[0];
- vertex[1] = coords[1];
- vertex[2] = coords[2];
- for (i = 3; i < 6; i++)
- vertex[i] = weight[0] * ((double[]) data[0])[i] +
- weight[1] * ((double[]) data[1])[i] +
- weight[2] * ((double[]) data[2])[i] +
- weight[3] * ((double[]) data[3])[i];
- outData[0] = vertex;
- }
- }//End TessCallback
-}//End Tess
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 18:51:55 +0000