myshare.java

关于java3D学习的示例程序

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.event.*;
import java.awt.GraphicsConfiguration;
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 com.sun.j3d.utils.behaviors.mouse.*;
public class MyShare extends Applet{
	public BranchGroup createSceneGraph(){
		BranchGroup objRoot=new BranchGroup();
		BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
		Color3f bgColor=new Color3f(0.6f,0.5f,1.0f);
		Background bg=new Background(bgColor);
		bg.setApplicationBounds(bounds);
		objRoot.addChild(bg);
		TransformGroup trans=new TransformGroup();
		trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
		objRoot.addChild(trans);
		trans.addChild(total());
		MouseRotate behavior=new MouseRotate();
		behavior.setTransformGroup(trans);
		objRoot.addChild(behavior);
		behavior.setSchedulingBounds(bounds);
		MouseZoom behavior2=new MouseZoom();
		behavior2.setTransformGroup(trans);
		objRoot.addChild(behavior2);
		behavior2.setSchedulingBounds(bounds);
		MouseTranslate behavior3=new MouseTranslate();
		behavior3.setTransformGroup(trans);
		objRoot.addChild(behavior3);
		behavior3.setSchedulingBounds(bounds);
		objRoot.compile();
		return objRoot;
	}
	public Group total(){
		Group gro=new Group();
		Point3f point1[]=new Point3f[3];
		point1[0]=new Point3f(0.0f,0.5f,0.0f);
		point1[1]=new Point3f(-0.4f,-0.5f,0.0f);
		point1[2]=new Point3f(0.4f,-0.5f,0.0f);
		Point3f point2[]=new Point3f[3];
		point2[0]=new Point3f(-0.2f,0.0f,0.0f);
		point2[1]=new Point3f(0.0f,-0.5f,0.0f);
		point2[2]=new Point3f(0.2f,0.0f,0.0f);
		Color3f color1[]=new Color3f[3];
		for(int i=0;i<3;i++)color1[i]=new Color3f(0.3f,0.7f,0.2f);
		Color3f color2[]=new Color3f[3];
		for(int i=0;i<3;i++)color2[i]=new Color3f(1.0f,1.0f,0.5f);
		TriangleArray plane1=new TriangleArray(3,TriangleArray.COORDINATES|TriangleArray.COLOR_3);
		plane1.setCoordinates(0,point1);
		plane1.setColors(0,color1);
		TriangleArray plane2=new TriangleArray(3,TriangleArray.COORDINATES|TriangleArray.COLOR_3);
		plane2.setCoordinates(0,point2);
		plane2.setColors(0,color2);
		Shape3D planeShape1=new Shape3D();
		Shape3D planeShape2=new Shape3D();
		planeShape1.setGeometry(plane1);
		planeShape2.setGeometry(plane2);
		DecalGroup obj=new DecalGroup();
		obj.addChild(planeShape1);
		obj.addChild(planeShape2);
		SharedGroup shared=new SharedGroup();
		shared.addChild(obj);
		Transform3D t1=new Transform3D();
		t1.setTranslation(new Vector3f(-0.1f,0.0f,0.0f));
		TransformGroup g1=new TransformGroup(t1);
		g1.addChild(new Link(shared));
		Transform3D t2=new Transform3D();
		t2.setTranslation(new Vector3f(-0.2f,0.0f,-0.1f));
		TransformGroup g2=new TransformGroup(t2);
		g2.addChild(new Link(shared));
		Transform3D t3=new Transform3D();
		t3.setTranslation(new Vector3f(0.0f,0.0f,0.1f));
		TransformGroup g3=new TransformGroup(t3);
		g3.addChild(new Link(shared));
		gro.addChild(g1);
		gro.addChild(g2);
		gro.addChild(g3);
		return gro;
	}
	public MyShare(){
		setLayout(new BorderLayout());
		Canvas3D c=new Canvas3D(null);
		add("Center",c);
		BranchGroup scene=createSceneGraph();
		SimpleUniverse u=new SimpleUniverse(c);
		u.getViewingPlatform().setNominalViewingTransform();
		u.addBranchGraph(scene);
	}
	public static void main(String[] args){
		new MainFrame(new MyShare(),400,300);
	}
}