geometrybyreferenceniobuffer.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: GeometryByReferenceNIOBuffer.java,v $
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
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 * This software is provided "AS IS," without a warranty of any
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 * $Revision: 1.1 $
 * $Date: 2006/02/01 01:32:35 $
 * $State: Exp $
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package org.jdesktop.j3d.examples.geometry_by_ref;

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import com.sun.j3d.utils.behaviors.vp.*;
import java.nio.*;

public class GeometryByReferenceNIOBuffer extends JApplet implements ActionListener,
GeometryUpdater {

    RenderingAttributes ra;
    ColoringAttributes ca;
    Material mat;			   
    Appearance app;			   
    JComboBox geomType;
    JComboBox vertexType;
    JComboBox colorType;
    JCheckBox transparency;
    JComboBox updates;
    Shape3D shape;			   
    TransparencyAttributes transp;
    int updateIndex = 0;
    int colorCount = 0, vertexCount = 0;
    int vertexIndex = 0, colorIndex = 0;
    
    GeometryArray tetraRegular, tetraStrip, tetraIndexed, tetraIndexedStrip;
    GeometryArray[] geoArrays = new GeometryArray[4];		   

    private static final float sqrt3 = (float) Math.sqrt(3.0);
    private static final float sqrt3_3 = sqrt3 / 3.0f;
    private static final float sqrt24_3 = (float) Math.sqrt(24.0) / 3.0f;

    private static final float ycenter = 0.5f * sqrt24_3;
    private static final float zcenter = -sqrt3_3;

    private static final Point3f p1 = 
	new Point3f(-1.0f, -ycenter, -zcenter);
    private static final Point3f p2 = 
	new Point3f(1.0f, -ycenter, -zcenter);
    private static final Point3f p3 =
	new Point3f(0.0f, -ycenter, -sqrt3 - zcenter);
    private static final Point3f p4 =
	new Point3f(0.0f, sqrt24_3 - ycenter, 0.0f);

    private static final float[] floatVerts = {
	p1.x, p1.y, p1.z, // front face
	p2.x, p2.y, p2.z,
	p4.x, p4.y, p4.z,
	
	p1.x, p1.y, p1.z,// left, back face
	p4.x, p4.y, p4.z,
	p3.x, p3.y, p3.z,
	
	p2.x, p2.y, p2.z,// right, back face
	p3.x, p3.y, p3.z,
	p4.x, p4.y, p4.z,
	
	p1.x, p1.y, p1.z,// bottom face
	p3.x, p3.y, p3.z,
	p2.x, p2.y, p2.z,
    };
    
    private static final Color3f c1 = new Color3f(0.6f, 0.0f, 0.0f);
    private static final Color3f c2 = new Color3f(0.0f, 0.6f, 0.0f);
    private static final Color3f c3 = new Color3f(0.0f, 0.6f, 0.6f);
    private static final Color3f c4 = new Color3f(0.6f, 0.6f, 0.0f);


    
    private static final float[] floatClrs = {
	c1.x, c1.y, c1.z, // front face
	c2.x, c2.y, c2.z,
	c4.x, c4.y, c4.z,
	
	c1.x, c1.y, c1.z,// left, back face
	c4.x, c4.y, c4.z,
	c3.x, c3.y, c3.z,
	
	c2.x, c2.y, c2.z,// right, back face
	c3.x, c3.y, c3.z,
	c4.x, c4.y, c4.z,
	
	c1.x, c1.y, c1.z,// bottom face
	c3.x, c3.y, c3.z,
	c2.x, c2.y, c2.z,
    };	

    private static final float[] indexedFloatVerts = {
	p1.x,p1.y,p1.z,
	p2.x,p2.y,p2.z,
	p3.x,p3.y,p3.z,
	p4.x,p4.y,p4.z,

    };

    
    private static final float[] indexedFloatClrs = {
	c1.x,c1.y,c1.z,
	c2.x,c2.y,c2.z,
	c3.x,c3.y,c3.z,
	c4.x,c4.y,c4.z,
    };
    
    private static final int[] indices = {0,1,3,0,3,2,1,2,3,0,2,1};
    private int[] stripVertexCounts = {3,3,3,3};

    private SimpleUniverse u;

    private J3DBuffer floatBufferCoord;
    private J3DBuffer floatBufferColor;
    private J3DBuffer indexedFloatBufferCoord;
    private J3DBuffer indexedFloatBufferColor;

    void createJ3DBuffers() {
	int i;
	ByteOrder order =  ByteOrder.nativeOrder();
	
	FloatBuffer coord = ByteBuffer.allocateDirect(36 * 4).order(order).asFloatBuffer();
	coord.put(floatVerts, 0, 36);
	floatBufferCoord = new J3DBuffer(coord);

	FloatBuffer color = ByteBuffer.allocateDirect(36 * 4).order(order).asFloatBuffer();
	color.put(floatClrs, 0, 36);
	floatBufferColor = new J3DBuffer(color);

	FloatBuffer indexedCoord = ByteBuffer.allocateDirect(12 * 4).order(order).asFloatBuffer();
	indexedCoord.put(indexedFloatVerts, 0, 12);
	indexedFloatBufferCoord = new J3DBuffer(indexedCoord);

	FloatBuffer indexedColor = ByteBuffer.allocateDirect(12 * 4).order(order).asFloatBuffer();
	indexedColor.put(indexedFloatClrs, 0, 12); 
	indexedFloatBufferColor = new J3DBuffer(indexedColor);
    }
    
    BranchGroup createSceneGraph() {
	BranchGroup objRoot = new BranchGroup();

	// Set up attributes to render lines
        app = new Appearance();

	transp = new TransparencyAttributes();
	transp.setTransparency(0.5f);
	transp.setCapability(TransparencyAttributes.ALLOW_MODE_WRITE);
	transp.setTransparencyMode(TransparencyAttributes.NONE);
	app.setTransparencyAttributes(transp);

	//create the direct nio buffer
	createJ3DBuffers();

	tetraRegular = createGeometry(1);
	tetraStrip =createGeometry(2);
	tetraIndexed = createGeometry(3);
	tetraIndexedStrip = createGeometry(4);

	geoArrays[0] = tetraRegular;
	geoArrays[1] = tetraStrip;
	geoArrays[2] = tetraIndexed;
	geoArrays[3] = tetraIndexedStrip;
	
	shape = new Shape3D(tetraRegular, app);
	shape.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE);
	shape.setCapability(Shape3D.ALLOW_GEOMETRY_READ);

	Transform3D t = new Transform3D();
	// move the object upwards
	t.set(new Vector3f(0.0f, 0.3f, 0.0f));

	// rotate the shape
	Transform3D temp = new Transform3D();
        temp.rotX(Math.PI/4.0d);
	t.mul(temp);
        temp.rotY(Math.PI/4.0d);
        t.mul(temp);
	
	// Shrink the object 
	t.setScale(0.6);

	TransformGroup trans = new TransformGroup(t);
	trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
	trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

	objRoot.addChild(trans);
	trans.addChild(shape);

	BoundingSphere bounds =
	    new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

	// Set up the global lights
	Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
	Vector3f lDir1  = new Vector3f(-1.0f, -1.0f, -1.0f);
	Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);

	AmbientLight aLgt = new AmbientLight(alColor);
	aLgt.setInfluencingBounds(bounds);
	DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
	lgt1.setInfluencingBounds(bounds);
	objRoot.addChild(aLgt);
	objRoot.addChild(lgt1);
	
	// Let Java 3D perform optimizations on this scene graph.
        objRoot.compile();

	return objRoot;
    }

    JPanel createGeometryByReferencePanel() {
	JPanel panel = new JPanel();