example6_15.java.bak

书中的例题

/* 3D文字 */
import com.sun.j3d.loaders.objectfile.*;
import java.awt.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.behaviors.vp.*;
import com.sun.j3d.utils.behaviors.keyboard.*;

class Text3d  
{
 private String fontName = "default";
 private String textString = null;
 private double tessellation = 0.0;
 private SimpleUniverse u;
 private OrbitBehavior orbit;
 public BranchGroup createSceneGraph()
 {
	float sl = textString.length();

	BranchGroup objRoot = new BranchGroup();
    TransformGroup objScale = new TransformGroup();
    Transform3D t3d = new Transform3D();
     // 设置字体大小
	t3d.setScale(1.5/sl);
    objScale.setTransform(t3d);
    objRoot.addChild(objScale);

	TransformGroup objTrans = new TransformGroup();
	objScale.addChild(objTrans);

	//建立3D字 
	Font3D f3d = new Font3D(new Font(fontName, Font.PLAIN, 2),
			     new FontExtrusion());
	Text3D txt = new Text3D(f3d, textString, 
	             new Point3f( -sl/2.0f, -1.f, -1.f));
	Shape3D sh = new Shape3D();
	Appearance app = new Appearance();
	Material mm = new Material();
	mm.setLightingEnable(true);
	app.setMaterial(mm);
	sh.setGeometry(txt);
	sh.setAppearance(app);
	objTrans.addChild(sh);

    //设置场景的范围
	BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
    //使物体旋转
   if (false)
	{
	  Transform3D yAxis = new Transform3D();
	  Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
					            0, 0, 4000, 0, 0, 0, 0, 0);
	  RotationInterpolator rotator =
	      new RotationInterpolator(rotationAlpha, objTrans, yAxis,
				                0.0f, (float) Math.PI*2.0f);
	  rotator.setSchedulingBounds(bounds);
	  objTrans.addChild(rotator);
	}

    // 设置背景
    Color3f bgColor = new Color3f(0.15f, 0.15f, 0.5f);
    Background bgNode = new Background(bgColor);
    bgNode.setApplicationBounds(bounds);
    objRoot.addChild(bgNode);

	// 设置环境光源
	Color3f ambientColor = new Color3f(0.9f, 0.9f, 0.9f);
	AmbientLight ambientLightNode = new AmbientLight(ambientColor);
	ambientLightNode.setInfluencingBounds(bounds);
	objRoot.addChild(ambientLightNode);
	
	// 设置光源方向
	Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
	Vector3f light1Direction  = new Vector3f(1.0f, 1.0f, 1.0f);
	Color3f light2Color = new Color3f(1.0f, 1.0f, 0.9f);
	Vector3f light2Direction  = new Vector3f(-1.0f, -1.0f, -1.0f);
	
	DirectionalLight light1
	    = new DirectionalLight(light1Color, light1Direction);
	light1.setInfluencingBounds(bounds);
	objRoot.addChild(light1);
	
	DirectionalLight light2
	    = new DirectionalLight(light2Color, light2Direction);
	light2.setInfluencingBounds(bounds);
	objRoot.addChild(light2);

	return objRoot;
    }

    public Text3d()
	{
      textString = "我喜欢Java";
	  BranchGroup scene = createSceneGraph();
	  u = new SimpleUniverse();
	  //在虚拟空间中添加鼠标行为
	  ViewingPlatform viewingPlatform = u.getViewingPlatform();
 	  viewingPlatform.setNominalViewingTransform();

	  //设置鼠标控制
	  orbit = new OrbitBehavior();
	  BoundingSphere bounds =
	            new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
	  orbit.setSchedulingBounds(bounds);
	  viewingPlatform.setViewPlatformBehavior(orbit);
	  
	  u.addBranchGraph(scene);
  }
}
 
public class Example6_15
{
	public static void main(String[] args)
       { new Text3d();  }
}