stool.java

java 3d 系列源码

// 【\source\chapter3\Stool.java】// 演示由基本形体组合生成复杂形体
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.*;
import java.awt.GraphicsConfiguration;

public class Stool 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);
    
    Color3f directionalColor=new Color3f(1.f,1.f,1.f);
    Vector3f vec=new Vector3f(0.f,0.f,-1.0f);
	DirectionalLight directionalLight=
		new DirectionalLight(directionalColor,vec);
    directionalLight.setInfluencingBounds(bounds);
    objRoot.addChild(directionalLight);

    Appearance app=new Appearance();
    Material material=new Material();                       
			// 为物体添加材质
    material.setDiffuseColor(new Color3f(1.0f,1.0f,0.0f));
			// 设置辐射光效果
    app.setMaterial(material);
    
  	TransformGroup xRot=new TransformGroup();
    Transform3D x = new Transform3D();
    xRot.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    xRot.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

    x.rotX(Math.PI/6);
    xRot.setTransform(x);
    objRoot.addChild(xRot);
           
    
    TransformGroup trans=new TransformGroup();
    Transform3D y = new Transform3D();
    y.rotY(Math.PI/4);
    trans.setTransform(y);
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    xRot.addChild(trans);
    
	// 拼装凳子
    TransformGroup g1=new TransformGroup();
    g1.addChild(new Box(0.4f,0.3f,0.05f,app));
    
    Transform3D t=new Transform3D();
    t.setTranslation(new Vector3f(-0.3f,0.2f,-0.3f));
    
    TransformGroup g2=new TransformGroup(t);
    g2.addChild(new Box(0.04f,0.04f,0.3f,app));
    
    t=new Transform3D();
    t.setTranslation(new Vector3f(-0.3f,-0.2f,-0.3f));
    
    TransformGroup g3=new TransformGroup(t);
    g3.addChild(new Box(0.04f,0.04f,0.3f,app));
    
    t=new Transform3D();
    t.setTranslation(new Vector3f(0.3f,0.2f,-0.3f));
    
    TransformGroup g4=new TransformGroup(t);
    g4.addChild(new Box(0.04f,0.04f,0.3f,app));
    
    t=new Transform3D();
    t.setTranslation(new Vector3f(0.3f,-0.2f,-0.3f));
    
    TransformGroup g5=new TransformGroup(t);
    g5.addChild(new Box(0.04f,0.04f,0.3f,app));
    
    t=new Transform3D();
    t.setTranslation(new Vector3f(-0.3f,0.0f,-0.3f));
    
    TransformGroup g6=new TransformGroup(t);
    g6.addChild(new Box(0.03f,0.2f,0.03f,app));
    
    t=new Transform3D();
    t.setTranslation(new Vector3f(0.3f,0.0f,-0.3f));
    
    TransformGroup g7=new TransformGroup(t);
    g7.addChild(new Box(0.03f,0.2f,0.03f,app));
     
    t=new Transform3D();
    t.setTranslation(new Vector3f(0.0f,0.2f,-0.2f));
    
    TransformGroup g8=new TransformGroup(t);
    g8.addChild(new Box(0.3f,0.03f,0.03f,app));

    t=new Transform3D();
    t.setTranslation(new Vector3f(0.0f,-0.2f,-0.2f));
    
    TransformGroup g9=new TransformGroup(t);
    g9.addChild(new Box(0.3f,0.03f,0.03f,app));
  
    trans.addChild(g1);
    trans.addChild(g2);
    trans.addChild(g3);
    trans.addChild(g4);
    trans.addChild(g5);
    trans.addChild(g6);
    trans.addChild(g7);    
    trans.addChild(g8);
    trans.addChild(g9);

    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 Stool() {
    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 Stool(),400,300);
  }
}