jcanvas3dnavigation.java

JavaSE 3D ,关于3D场景中如何导航的源码

        locale = new Locale(vu);        
        //
        // BranchGraphs
        //		
        sceneBranch = new BranchGroup();
        viewBranch = new BranchGroup();
        enviBranch = new BranchGroup();
        
        // ViewBranch
        
        TransformGroup viewTG = new TransformGroup();
        viewTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
                       
        ViewPlatform vp = new ViewPlatform();
        view.attachViewPlatform(vp);
        
        orbitBehInterim = new OrbitBehaviorInterim(jCanvas3D, viewTG, OrbitBehaviorInterim.REVERSE_ALL);
        orbitBehInterim.setSchedulingBounds(globalBounds);
        
        Transform3D homeTransform = new Transform3D();
        homeTransform.setTranslation(new Vector3f(0.0f, 0.5f, 15.0f));
        orbitBehInterim.setHomeTransform(homeTransform);        
        orbitBehInterim.setHomeRotationCenter(new Point3d(0.0, 0.0, 2.0));
        
        DirectionalLight headLight = new DirectionalLight();
        headLight.setInfluencingBounds(globalBounds);

        viewTG.addChild(vp);
        viewTG.addChild(orbitBehInterim);
        viewTG.addChild(headLight);
        
        viewBranch.addChild(viewTG);
        
        // EnviBranch
        
        Background bg = new Background();
        bg.setApplicationBounds(globalBounds);
        bg.setColor(new Color3f(bgColor));
        
        enviBranch.addChild(bg);

        // SceneBranch
        
        scaleTG = new TransformGroup();
        scaleTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        
        sceneBranch.addChild(scaleTG);
        
        characterTG = new TransformGroup();        
        // Center of character 
        Transform3D charTransform = new Transform3D();
        // Scale to a depth of 2.0f (0.2f * 10.0)
        charTransform.setScale(new Vector3d(1.0f, 1.0f, 10.0f));
        // Rotate around X
        charTransform.setRotation(new AxisAngle4f(1.0f, 0.0f, 0.0f, -0.35f));
        // Center text
        charTransform.setTranslation(new Vector3f(-4.2f, -0.36f, 0.0f));
        characterTG.setTransform(charTransform);

        scaleTG.addChild(characterTG);        
    }
    
	private void showJCanvas3D() {
		
		Toolkit toolkit = Toolkit.getDefaultToolkit();
        Dimension screenDim = toolkit.getScreenSize();
	    	
        Dimension dim = new Dimension(screenDim.width - 20, screenDim.width / 3);
        jCanvas3D.setPreferredSize(dim);
        jCanvas3D.setSize(dim);
        
        JPanel jPanel = new JPanel(new BorderLayout());
		jPanel.add(jCanvas3D, BorderLayout.CENTER);
		
		// Off-screen Canvas3D of this lightweight JCanvas3D
        offCanvas3D = jCanvas3D.getOffscreenCanvas3D();
        if (offCanvas3D != null) {
        	// View renders into the off-screen Canvas3D
        	view.addCanvas3D(offCanvas3D);
        	
        	// PickCanvas operates on the not visible off-screen Canvas3D
    	    pickCanvas = new PickCanvas(offCanvas3D, sceneBranch);
    	    pickCanvas.setMode(PickInfo.PICK_GEOMETRY); 
    	    pickCanvas.setFlags(PickInfo.NODE | PickInfo.CLOSEST_INTERSECTION_POINT); 
    	    pickCanvas.setTolerance(4.0f);
        }
        else {
            System.out.println("JCanvas3DNavigation: OffscreenCanvas3D = null !!");
            System.exit(0);
        }

        // GUI / User actions
        
        int fontSize = 14; 
    	if (screenDim.height < 1024)
    		fontSize = 11;
    	else if (screenDim.height < 1200)
        	fontSize = 12;
       
        Font font = new Font("SansSerif", Font.BOLD, fontSize);
        
	    JPanel jPanelLine = new JPanel(new BorderLayout());
	    jPanelLine.setBackground(new Color(0.05f, 0.05f, 0.8f));	    
	    jPanelLine.setBorder(BorderFactory.createEmptyBorder(3, 0, 0, 0));


	    JPanel jPanelActionX = new JPanel();
	    BoxLayout boxLayoutX = new BoxLayout(jPanelActionX, BoxLayout.X_AXIS);
	    jPanelActionX.setLayout(boxLayoutX);
	    jPanelActionX.setBackground(bgColor);	    
	    jPanelActionX.setBorder(BorderFactory.createEmptyBorder(10, 0, 10, 0));
	    
	    jPanelLine.add(jPanelActionX, BorderLayout.CENTER);
	    
	    JPanel jPanelActionXX = new JPanel();
	    BoxLayout boxLayoutXX = new BoxLayout(jPanelActionXX, BoxLayout.X_AXIS);
	    jPanelActionXX.setLayout(boxLayoutXX);
	    jPanelActionXX.setBackground(bgColor);
	    jPanelActionXX.setBorder(BorderFactory.createCompoundBorder(
	    				BorderFactory.createLoweredBevelBorder(), 
	    				BorderFactory.createEmptyBorder(10, 10, 10, 10)));
	    	    	   
	    jPanelActionX.add(Box.createHorizontalGlue());
	    jPanelActionX.add(jPanelActionXX);

	    // Home Transform
	    JPanel jPanelActionHome = new JPanel();
	    BoxLayout boxLayoutHome = new BoxLayout(jPanelActionHome, BoxLayout.Y_AXIS);
	    jPanelActionHome.setLayout(boxLayoutHome);

	    TitledBorder tBorderHome = BorderFactory.createTitledBorder(" Home Transform ");
	    tBorderHome.setTitleFont(font);
	    tBorderHome.setTitleColor(bgColor);
	    tBorderHome.setBorder(BorderFactory.createLineBorder(bgColor));
	    
	    jPanelActionHome.setBorder(BorderFactory.createCompoundBorder(
		    				BorderFactory.createRaisedBevelBorder(), tBorderHome));
	    
	    JButton jButtonHomeTransform = new JButton("Go Home");
	    jButtonHomeTransform.setFont(font);
	    jButtonHomeTransform.setForeground(bgColor);
	    jButtonHomeTransform.setAlignmentX(Component.CENTER_ALIGNMENT);
	    
	    jButtonHomeTransform.addActionListener(new ActionListener() {
	    	public void actionPerformed(ActionEvent event) {
	    		
	    		orbitBehInterim.goHome(isHomeRotCenter);
	    		
	    	}
	    });
	    
	    JCheckBox jChecHomeRotCenter = new JCheckBox("Home Rotation Center");
	    jChecHomeRotCenter.setFont(font);
	    jChecHomeRotCenter.setForeground(bgColor);
	    jChecHomeRotCenter.setAlignmentX(Component.CENTER_ALIGNMENT);
	    
	    jChecHomeRotCenter.addActionListener(new ActionListener() {
	    	public void actionPerformed(ActionEvent event) {
	    		
	    		isHomeRotCenter = ((JCheckBox)event.getSource()).isSelected();
	    		
	    	}
	    });
	    
	    jPanelActionHome.add(jButtonHomeTransform);
	    jPanelActionHome.add(jChecHomeRotCenter);
	    
	    jPanelActionXX.add(jPanelActionHome);	    
	    jPanelActionXX.add(Box.createHorizontalStrut(10));	
	    
	    // Center picking
	    JPanel jPanelActionCenter = new JPanel();
	    BoxLayout boxLayoutCenter = new BoxLayout(jPanelActionCenter, BoxLayout.Y_AXIS);
	    jPanelActionCenter.setLayout(boxLayoutCenter);

	    TitledBorder tBorderCenter = BorderFactory.createTitledBorder(" Rotation Center Picking ");
	    tBorderCenter.setTitleFont(font);
	    tBorderCenter.setTitleColor(bgColor);
	    tBorderCenter.setBorder(BorderFactory.createLineBorder(bgColor));
	    
	    jPanelActionCenter.setBorder(BorderFactory.createCompoundBorder(
		    				BorderFactory.createRaisedBevelBorder(), tBorderCenter));
	    
	    JPanel jPanelPickMode = new JPanel();
	    BoxLayout boxLayoutPickMode = new BoxLayout(jPanelPickMode, BoxLayout.X_AXIS);
	    jPanelPickMode.setLayout(boxLayoutPickMode);
	    jPanelPickMode.setAlignmentX(Component.CENTER_ALIGNMENT);

	    final JRadioButton jRadioPickVertex = new JRadioButton("Pick Vertex");
	    final JRadioButton jRadioPickShape = new JRadioButton("Pick Shape");
	    
	    jRadioPickVertex.setFont(font);
	    jRadioPickShape.setFont(font);
	    
	    jRadioPickVertex.setForeground(bgColor);
	    jRadioPickShape.setForeground(bgColor);
	    
	    ButtonGroup bGroup = new ButtonGroup();
	    bGroup.add(jRadioPickVertex);
	    bGroup.add(jRadioPickShape);
	    
	    jRadioPickVertex.setSelected(true);
	    
	    ItemListener pickModeListener = new ItemListener() {
	    	public void itemStateChanged(ItemEvent event) {
	    		
	    		isPickVertex = jRadioPickVertex.isSelected();
	    		
	    	}
	    };
	    jRadioPickVertex.addItemListener(pickModeListener);
	    jRadioPickShape.addItemListener(pickModeListener);
	    
	    jPanelPickMode.add(jRadioPickVertex);
	    jPanelPickMode.add(Box.createHorizontalStrut(5));
	    jPanelPickMode.add(jRadioPickShape);
	    
	    JCheckBox jCheckLookAtCenter = new JCheckBox("Look at Center");
	    jCheckLookAtCenter.setFont(font);
	    jCheckLookAtCenter.setForeground(bgColor);
	    jCheckLookAtCenter.setAlignmentX(Component.CENTER_ALIGNMENT);
	    
	    jCheckLookAtCenter.addActionListener(new ActionListener() {
	    	public void actionPerformed(ActionEvent event) {
	    		
	    		isLookAtRotCenter = ((JCheckBox)event.getSource()).isSelected();
	    		
	    	}
	    });
	    
	    jPanelActionCenter.add(jPanelPickMode);
	    jPanelActionCenter.add(jCheckLookAtCenter);
	    
	    jPanelActionXX.add(jPanelActionCenter);	   
	    jPanelActionXX.add(Box.createHorizontalStrut(10));
	    
	    // Look At Current Center
	    JPanel jPanelActionLookAt = new JPanel();
	    BoxLayout boxLayoutLookAt = new BoxLayout(jPanelActionLookAt, BoxLayout.Y_AXIS);
	    jPanelActionLookAt.setLayout(boxLayoutLookAt);

	    TitledBorder tBorderLookAt = BorderFactory.createTitledBorder(" Center Transform ");
	    tBorderLookAt.setTitleFont(font);
	    tBorderLookAt.setTitleColor(bgColor);
	    tBorderLookAt.setBorder(BorderFactory.createCompoundBorder(
					    		BorderFactory.createLineBorder(bgColor),
					    		BorderFactory.createEmptyBorder(0, 4, 0, 4)));
	    
	    jPanelActionLookAt.setBorder(BorderFactory.createCompoundBorder(
		    				BorderFactory.createRaisedBevelBorder(), tBorderLookAt));
	    
	    JButton jButtonLookAt = new JButton("Look at Center");
	    jButtonLookAt.setFont(font);
	    jButtonLookAt.setForeground(bgColor);
	    jButtonLookAt.setAlignmentX(Component.CENTER_ALIGNMENT);
	    
	    jButtonLookAt.addActionListener(new ActionListener() {
	    	public void actionPerformed(ActionEvent event) {
	    		
	    		orbitBehInterim.lookAtRotationCenter();
	    		
	    	}
	    });
	    
	    JPanel spacePanel = new JPanel();
	    spacePanel.setMaximumSize(jButtonLookAt.getPreferredSize());
	    spacePanel.setAlignmentX(Component.CENTER_ALIGNMENT);
	    
	    jPanelActionLookAt.add(jButtonLookAt);
	    jPanelActionLookAt.add(spacePanel);
	    
	    jPanelActionXX.add(jPanelActionLookAt);	    
	    
	    jPanelActionX.add(Box.createHorizontalGlue());

	    jPanel.add(jPanelLine, BorderLayout.SOUTH);
	    
	    // JFrame
	    
		JFrame jFrame = new JFrame();
		jFrame.setTitle("InteractiveMesh : JCanvas3D Navigation");
		jFrame.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
		jFrame.add(jPanel);
		jFrame.pack();
		
        Dimension jframeDim = jFrame.getSize();
        jFrame.setLocation((screenDim.width - jframeDim.width)/2, (screenDim.height - jframeDim.height)/2);

		jFrame.setVisible(true);
	}	
}