mydecal.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.ColorCube;
import com.sun.j3d.utils.geometry.Primitive;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.behaviors.mouse.*;
public class MyDecal 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(0.0f,0.0f,0.0f);
		Background bg=new Background(bgColor);
		bg.setApplicationBounds(bounds);
		objRoot.addChild(bg);
		Point3f point1[]=new Point3f[3];
		point1[0]=new Point3f(0.0f,.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(1.0f,0.0f,0.0f);
		Color3f color2[]=new Color3f[3];
		for(int i=0;i<3;i++)color2[i]=new Color3f(1.0f,1.0f,0.0f);
		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);
		TransformGroup trans=new TransformGroup();
		trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
		objRoot.addChild(trans);
		DecalGroup obj1=new DecalGroup();
		//TransformGroup obj1=new TransformGroup();
		//Group obj1=new Group();
		trans.addChild(obj1);
		obj1.addChild(planeShape1);
		obj1.addChild(planeShape2);
		
		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 MyDecal(){
		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 MyDecal(),400,300);
	}
}