mydecal.java

java 3d 系列源码

//MyDecal.java
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.*;
import java.awt.GraphicsConfiguration;
  
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,-.5f,0.0f);
    	point1[2]=new Point3f(0.4f,-.5f,0.0f);
    
    	Point3f point2[]=new Point3f[3];
    	point2[0]=new Point3f(-0.2f,0.0f,0.0f);
    	point2[1]=new Point3f(0.0f,-.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);
    	Transform3D y = new Transform3D();
    	y.rotY(Math.PI/8);
    	trans.setTransform(y);
    
  //  	TransformGroup obj1=new TransformGroup();
 		DecalGroup obj1=new DecalGroup();
    	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());
    	GraphicsConfiguration config = 
               SimpleUniverse.getPreferredConfiguration();
    	Canvas3D c=new Canvas3D(config);
    	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);
  	}
}//end of MyDecal.java