Java3d，求助关于画面未填满，且不在中心的原因

weixin_43626964 2019-01-17 04:04:10

3D对象不在画布Canvas3D的中心，实际位置偏左下，且距离上边框和右边框都有一定的空白，
谁知道是为什么？不吝赐教，谢谢

另外，程序128-132行，MouseTranslate，鼠标右键平移无法实现，左中右三键点击拖拽都是旋转，
不知道为什么？



package sjw.java3d.chapter10;



import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.GraphicsConfiguration;

import java.awt.TextArea;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;



import javax.imageio.ImageIO;

import javax.media.j3d.AmbientLight;

import javax.media.j3d.Appearance;

import javax.media.j3d.Background;

import javax.media.j3d.BoundingSphere;

import javax.media.j3d.BranchGroup;

import javax.media.j3d.Canvas3D;

import javax.media.j3d.ImageComponent2D;

import javax.media.j3d.Material;

import javax.media.j3d.PointLight;

import javax.media.j3d.Texture;

import javax.media.j3d.Texture2D;

import javax.media.j3d.Transform3D;

import javax.media.j3d.TransformGroup;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.vecmath.Color3f;

import javax.vecmath.Point3f;

import javax.vecmath.Vector3d;



import com.sun.j3d.utils.behaviors.mouse.MouseRotate;

import com.sun.j3d.utils.behaviors.mouse.MouseTranslate;

import com.sun.j3d.utils.behaviors.mouse.MouseWheelZoom;

import com.sun.j3d.utils.behaviors.mouse.MouseZoom;

import com.sun.j3d.utils.geometry.Primitive;

import com.sun.j3d.utils.geometry.Sphere;

import com.sun.j3d.utils.image.TextureLoader;

import com.sun.j3d.utils.universe.SimpleUniverse;



import sjw.java3d.chapter07.Axes;



/**

 * 鼠标行为：MouseBehavior

 * 		1、触发动作

 * 		2、目标对象TransformGroup

 * 		3、处理方法

 * 

 * MouseBehavior

 * 		|- MouseRotate

 * 		|- MouseTranslate

 * 		|- MouseZoom

 * 

 * @author aaron

 *

 */

public class MoveGlobe extends JFrame {



	public static void main(String[] args) {

		JFrame frame = new MoveGlobe();

		frame.setTitle("Java 3D");

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		frame.setSize(480, 480);

//		frame.pack();

		frame.setVisible(true);



	}

	

	public MoveGlobe() {



		// Canvas3D

		GraphicsConfiguration gc = SimpleUniverse.getPreferredConfiguration();

		Canvas3D cv = new Canvas3D(gc);

		setLayout(new BorderLayout());

		add(cv, BorderLayout.CENTER);

		

		TextArea ta = new TextArea("", 3, 30, TextArea.SCROLLBARS_NONE);

		ta.setText("Rotation: Drag with left button\n");

		ta.append("Translation: Drag with right button\n");

		ta.append("Zoom: Hold Alt key and drag with left button");

		add(ta, BorderLayout.SOUTH);

		

		// SimpleUniverse

		SimpleUniverse su = new SimpleUniverse(cv);

		

		// BranchGroup, 图形root

		su.getViewingPlatform().setNominalViewingTransform();

		

		// BranchGroup, 视图root

		BranchGroup bg = createSceneGraph();

		bg.compile();

		su.addBranchGraph(bg);

		

	}



	private BranchGroup createSceneGraph() {

		

		BranchGroup root = new BranchGroup();

		

		// 坐标轴

		Transform3D tr = new Transform3D();

		tr.setScale(0.5);

		tr.setTranslation(new Vector3d(-0.8, -0.7, -0.5));

		TransformGroup tg = new TransformGroup(tr);

		root.addChild(tg);

		Axes axes = new Axes();

		tg.addChild(axes);

		

		// spin -> tg -> Shape3D

		TransformGroup spin = new TransformGroup();

		spin.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);

		spin.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

		root.addChild(spin);

		Appearance ap = createAppearance();

		spin.addChild(new Sphere(0.7f, Primitive.GENERATE_TEXTURE_COORDS, 50, ap));

		

		// bounds

		BoundingSphere bounds = new BoundingSphere();

		

		// Behavior: 鼠标左键拖动

		MouseRotate rotator = new MouseRotate();	// 传入TransformGroup

		rotator.setTransformGroup(spin);

		rotator.setSchedulingBounds(bounds);

		root.addChild(rotator);

		

		// Behavior: 鼠标右键平移

		MouseTranslate translator = new MouseTranslate();

		translator.setTransformGroup(spin);

		translator.setSchedulingBounds(bounds);

		root.addChild(translator);



//		MouseTranslate translator = new MouseTranslate();

//		translator.setTransformGroup(spin);

//		spin.addChild(translator);

//		translator.setSchedulingBounds(bounds);

		

		// Behavior: 鼠标	second mouse button

		MouseZoom zoom = new MouseZoom();

		zoom.setTransformGroup(spin);

		zoom.setSchedulingBounds(bounds);

		root.addChild(zoom);

		

		// Behavior: wheel

		MouseWheelZoom wheel = new MouseWheelZoom();

		wheel.setTransformGroup(spin);

		wheel.setSchedulingBounds(bounds);

		root.addChild(wheel);

		

		// Lights

		AmbientLight light = new AmbientLight(true, new Color3f(Color.BLUE));

		light.setInfluencingBounds(bounds);

		root.addChild(light);

		

		PointLight ptlight = new PointLight(new Color3f(Color.WHITE),

								new Point3f(0f, 0f, 2f),

								new Point3f(1f, 0.3f, 0f));

		ptlight.setInfluencingBounds(bounds);

		root.addChild(ptlight);

		

		// Background

		Background background = new Background(0.7f, 0.7f, 0.7f);

		background.setApplicationBounds(bounds);

		root.addChild(background);

		

		return root;

	}



	private Appearance createAppearance() {

		Appearance appear = new Appearance();

		

		BufferedImage bi = null;

		try {

			bi = ImageIO.read(new File("C:\\Users\\aaron\\Pictures\\FLAMING MOUNTAIN.JPG"));

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		

		TextureLoader loader = new TextureLoader(bi, this);	// 纹理载入

		ImageComponent2D image = loader.getImage();

		Texture2D texture = new Texture2D(Texture.BASE_LEVEL, Texture.RGBA,

				image.getWidth(), image.getHeight());

		texture.setImage(0, image);

		texture.setEnable(true);

		texture.setMagFilter(texture.BASE_LEVEL_LINEAR);

		texture.setMinFilter(Texture.BASE_LEVEL_LINEAR);

		appear.setTexture(texture);

		

		

		return appear;

	}



}