pyramid2cube.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: Pyramid2Cube.java,v $
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
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 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
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 * $Revision: 1.2 $
 * $Date: 2006/03/03 03:23:40 $
 * $State: Exp $
 */

package org.jdesktop.j3d.examples.morphing;

import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.GraphicsConfiguration;

public class Pyramid2Cube extends javax.swing.JFrame {

    private SimpleUniverse univ = null;
    private BranchGroup scene = null;

    private BranchGroup createSceneGraph() {
	// Create the root of the branch graph
	BranchGroup objRoot = new BranchGroup();

	// Create a Transformgroup to scale all objects so they
	// appear in the scene.
	TransformGroup objScale = new TransformGroup();
	Transform3D t3d = new Transform3D();
	t3d.setScale(0.4);
	objScale.setTransform(t3d);
	objRoot.addChild(objScale);


 	// Create a bounds for the background and behavior
 	BoundingSphere bounds =
	    new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

 	// Set up the background
 	Color3f bgColor = new Color3f(0.05f, 0.05f, 0.2f);
 	Background bg = new Background(bgColor);
 	bg.setApplicationBounds(bounds);
 	objScale.addChild(bg);

	//
	// Create the transform group nodes for the 3 original objects
	// and the morphed object.  Add them to the root of the
	// branch graph.
	//
	TransformGroup objTrans[] = new TransformGroup[4];

	for(int i=0; i<4; i++) {
	    objTrans[i] = new TransformGroup();
	    objScale.addChild(objTrans[i]);
	}

	Transform3D tr = new Transform3D();
	Transform3D rotY15 = new Transform3D();
	rotY15.rotY(15.0 * Math.PI / 180.0);

	objTrans[0].getTransform(tr);
	tr.setTranslation(new Vector3d(-3.0, 1.5, -6.5));
	tr.mul(rotY15);
	objTrans[0].setTransform(tr);

	objTrans[1].getTransform(tr);
	tr.setTranslation(new Vector3d(0.0, 1.5, -6.5));
	tr.mul(rotY15);
	objTrans[1].setTransform(tr);

	objTrans[2].getTransform(tr);
	tr.setTranslation(new Vector3d(3.0, 1.5, -6.5));
	tr.mul(rotY15);
	objTrans[2].setTransform(tr);

	objTrans[3].getTransform(tr);
	tr.setTranslation(new Vector3d(0.0, -2.0, -5.0));
	tr.mul(rotY15);
	objTrans[3].setTransform(tr);

	// Now create simple geometries.

	QuadArray g[] = new QuadArray[3];
	Shape3D shape[] = new Shape3D[3];
	for(int i=0; i<3; i++) {
	    g[i] = null;
	    shape[i] = null;
	}

	g[0] = new ColorPyramidUp();
	g[1] = new ColorCube();
	g[2] = new ColorPyramidDown();

	Appearance a = new Appearance();

	for(int i=0; i<3;i++) {
	    shape[i] = new Shape3D(g[i],a); 
	    objTrans[i].addChild(shape[i]);
	}

	//
	// Create a Morph node, and set the appearance and input geometry
	// arrays.  Set the Morph node's capability bits to allow the weights
	// to be modified at runtime.
	//
 	Morph morph = new Morph((GeometryArray[]) g, a);
	morph.setCapability(Morph.ALLOW_WEIGHTS_READ);
	morph.setCapability(Morph.ALLOW_WEIGHTS_WRITE);

	objTrans[3].addChild(morph);

	// Now create the Alpha object that controls the speed of the
	// morphing operation.
	Alpha morphAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE |
				     Alpha.DECREASING_ENABLE,
				     0, 0,
				     4000, 1000, 500,
				     4000, 1000, 500);

	// Finally, create the morphing behavior
	MorphingBehavior mBeh = new MorphingBehavior(morphAlpha, morph);
	mBeh.setSchedulingBounds(bounds);
	objScale.addChild(mBeh);

	return objRoot;
    }
    
    private Canvas3D createUniverse() {
	// Get the preferred graphics configuration for the default screen
	GraphicsConfiguration config =
	    SimpleUniverse.getPreferredConfiguration();

	// Create a Canvas3D using the preferred configuration
	Canvas3D c = new Canvas3D(config);

	// Create simple universe with view branch
	univ = new SimpleUniverse(c);

	// This will move the ViewPlatform back a bit so the
	// objects in the scene can be viewed.
	univ.getViewingPlatform().setNominalViewingTransform();

	// Ensure at least 5 msec per frame (i.e., < 200Hz)
	univ.getViewer().getView().setMinimumFrameCycleTime(5);

	return c;
    }

    /**
     * Creates new form Pyramid2Cube
     */
    public Pyramid2Cube() {
	// Initialize the GUI components
	initComponents();

	// Create Canvas3D and SimpleUniverse; add canvas to drawing panel
	Canvas3D c = createUniverse();
	drawingPanel.add(c, java.awt.BorderLayout.CENTER);

	// Create the content branch and add it to the universe
	scene = createSceneGraph();
	univ.addBranchGraph(scene);
    }

    // ----------------------------------------------------------------
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
    private void initComponents() {
        drawingPanel = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Pyramid2Cube");
        drawingPanel.setLayout(new java.awt.BorderLayout());

        drawingPanel.setPreferredSize(new java.awt.Dimension(700, 700));
        getContentPane().add(drawingPanel, java.awt.BorderLayout.CENTER);

        pack();
    }// </editor-fold>//GEN-END:initComponents
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Pyramid2Cube().setVisible(true);
            }
        });
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JPanel drawingPanel;
    // End of variables declaration//GEN-END:variables
    
}