cohensutherlandclipping.java

基于java的3d开发库。对坐java3d的朋友有很大的帮助。

    }
    
    /** Called to indicate the drawing surface has been moved and/or resized */
    public void reshape (GLAutoDrawable drawable,
                         int x,
                         int y,
                         int width,
                         int height) {
        GL gl = drawable.getGL();
        gl.glViewport(0, 0, width, height); 

        camera1.updateViewportResize(width, height);
    }   

    public void mouseEntered(MouseEvent e) {
        canvas.requestFocusInWindow();
    }

    public void mouseExited(MouseEvent e) {
        //System.out.println("Mouse exited");
    }

    public void mousePressed(MouseEvent e) {
        if ( cameraController.processMousePressedEventAwt(e) ) {
            canvas.repaint();
        }
    }

    public void mouseReleased(MouseEvent e) {
        if ( cameraController.processMouseReleasedEventAwt(e) ) {
            canvas.repaint();
        }
    }

    public void mouseClicked(MouseEvent e) {
        if ( cameraController.processMouseClickedEventAwt(e) ) {
            canvas.repaint();
        }
    }

    public void mouseMoved(MouseEvent e) {
        if ( cameraController.processMouseMovedEventAwt(e) ) {
            canvas.repaint();
        }
    }

    public void mouseDragged(MouseEvent e) {
        if ( cameraController.processMouseDraggedEventAwt(e) ) {
            canvas.repaint();
        }
    }

    /**
       WARNING: It is not working... check pending
    */
    public void mouseWheelMoved(MouseWheelEvent e) {
        System.out.println(".");
        if ( cameraController.processMouseWheelEventAwt(e) ) {
            canvas.repaint();
        }
    }

    public void keyPressed(KeyEvent e) {
        if ( e.getKeyCode() == KeyEvent.VK_ESCAPE ) {
            System.exit(0);
        }

        if ( cameraController.processKeyPressedEventAwt(e) ) {
            canvas.repaint();
        }
    }

    public void keyReleased(KeyEvent e) {
        if ( cameraController.processKeyReleasedEventAwt(e) ) {
            canvas.repaint();
        }
    }

    /**
       Do NOT call your controller from the `keyTyped` method, or the controller
       will be invoked twice for each key. Call it only from the `keyPressed` and
       `keyReleased` method
    */
    public void keyTyped(KeyEvent e) {
        ;
    }

    public JMenuBar buildMenu()
    {
        //------------------------------------------------------------
        JMenuBar menubar;
        JMenu popup;
        JMenuItem option;

        menubar = new JMenuBar();

        //------------------------------------------------------------
        popup = new JMenu("File");
        menubar.add(popup);
        option = popup.add(new JMenuItem("Exit"));
        option.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    System.exit(0);
                }});
        popup.getPopupMenu().setLightWeightPopupEnabled(false);

        //------------------------------------------------------------
        popup = new JMenu("Help");
        menubar.add(popup);
        option = popup.add(new JMenuItem("About"));
        MyActionListener mostrador_ayuda = new MyActionListener(menubar);
        option.addActionListener(mostrador_ayuda);
        popup.getPopupMenu().setLightWeightPopupEnabled(false);

        //------------------------------------------------------------

        return menubar;
    }

}

class MyActionListener implements ActionListener {
    private Component parent;

    MyActionListener(Component parent)
        {
            this.parent = parent;
        }

    public void actionPerformed(ActionEvent e) {
        JOptionPane.showMessageDialog(parent, 
                                      "This program is a test for the Cohen-Sutherland 3D line clipping algorithm " +
                                      "implemented in the Camera class of the VSDK. Move each line edge with the " +
                                      "sliders and observe the line behavior respect the second camera view volume."
                                      );
    }
}

class ControlPanel extends JPanel implements AdjustmentListener, ActionListener
{
    private CohenSutherlandClipping parent;

    public ControlPanel(CohenSutherlandClipping parent) {
        //-----------------------------------------------------------------
        JScrollBar sb;
        JLabel jl;
        JPanel frame = null;
        JPanel innerframe = null;
        String names[] = new String[6];

        this.parent = parent;

        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));

        //-----------------------------------------------------------------
        JRadioButton rb;
        ButtonGroup bg = new ButtonGroup();

        frame = new JPanel();
        frame.setLayout(new BoxLayout(frame, BoxLayout.X_AXIS));
        add(frame);
        frame.add(new JLabel("CAMERAS CONTROL -> "));

        innerframe = new JPanel();
        innerframe.setBorder(
            BorderFactory.createEtchedBorder(EtchedBorder.LOWERED));
        innerframe.setLayout(new BoxLayout(innerframe, BoxLayout.X_AXIS));
        rb = new JRadioButton("Primary camera selected for control");
        rb.setSelected(true);
        rb.setActionCommand("ActivateCamera1");
        rb.addActionListener(this);
        bg.add(rb);
        innerframe.add(rb);
        rb = new JRadioButton("Secondary camera selected for control");
        rb.setSelected(false);
        rb.setActionCommand("ActivateCamera2");
        rb.addActionListener(this);
        bg.add(rb);
        innerframe.add(rb);
        frame.add(innerframe);

        //-----------------------------------------------------------------
        JPanel frame2;

        frame2 = new JPanel();
        JButton b;

        b = new JButton("Top view");
        b.addActionListener(this);
        frame2.add(b);

        b = new JButton("Front view");
        b.addActionListener(this);
        frame2.add(b);

        b = new JButton("Left view");
        b.addActionListener(this);
        frame2.add(b);

        b = new JButton("Perspective view");
        b.addActionListener(this);
        frame2.add(b);

        add(frame2);
        //-----------------------------------------------------------------
        names[0] = "x1";
        names[1] = "y1";
        names[2] = "z1";
        names[3] = "x2";
        names[4] = "y2";
        names[5] = "z2";
        for ( int i = 0; i < 6; i++ ) {
            if ( i == 0 || i == 3 ) {
                frame = new JPanel();
                frame.setLayout(new BoxLayout(frame, BoxLayout.X_AXIS));
                add(frame);
                if ( i == 0 ) frame.add(new JLabel("     FIRST POINT -> "));
                else frame.add(new JLabel(" SECOND POINT -> "));

                innerframe = new JPanel();
                innerframe.setBorder(
                    BorderFactory.createEtchedBorder(EtchedBorder.LOWERED));
                innerframe.setLayout(new BoxLayout(innerframe, BoxLayout.X_AXIS));
                frame.add(innerframe);
            }
            jl = new JLabel(names[i] + ": ");
            innerframe.add(jl);
            sb = new JScrollBar(JScrollBar.HORIZONTAL);
            sb.setName(names[i]);
            sb.addAdjustmentListener(this);
            sb.setMinimum(0);
            sb.setMaximum(100);
            //sb.setValue(50);
            innerframe.add(sb);
        }
        //-----------------------------------------------------------------
    }

    public void adjustmentValueChanged(AdjustmentEvent ev) {
        double val = (((double)ev.getValue()) - 50.0) / 10.0;

        if ( ((JScrollBar)ev.getAdjustable()).getName().equals("x1") ) {
            parent.point0.x = val;
        }
        else if ( ((JScrollBar)ev.getAdjustable()).getName().equals("y1") ) {
            parent.point0.y = val;
        }
        else if ( ((JScrollBar)ev.getAdjustable()).getName().equals("z1") ) {
            parent.point0.z = val;
        }
        else if ( ((JScrollBar)ev.getAdjustable()).getName().equals("x2") ) {
            parent.point1.x = val;
        }
        else if ( ((JScrollBar)ev.getAdjustable()).getName().equals("y2") ) {
            parent.point1.y = val;
        }
        else if ( ((JScrollBar)ev.getAdjustable()).getName().equals("z2") ) {
            parent.point1.z = val;
        }
        parent.canvas.repaint();
    }

    public void actionPerformed(ActionEvent e)
        {
            if ( ((String)e.getActionCommand()).equals("ActivateCamera1") ) {
                parent.cameraController = 
                    new CameraControllerAquynza(parent.camera1);
            }
            else if ( ((String)e.getActionCommand()).equals("Top view") ) {
                parent.setTopView();
            }
            else if ( ((String)e.getActionCommand()).equals("Front view") ) {
                parent.setFrontView();
            }
            else if ( ((String)e.getActionCommand()).equals("Left view") ) {
                parent.setLeftView();
            }
            else if ( ((String)e.getActionCommand()).equals("Perspective view") ) {
                parent.setPerspectiveView();
            }
            else {
                parent.cameraController = 
                    new CameraControllerAquynza(parent.camera2);
            }

            parent.canvas.repaint();
        }
}

//===========================================================================
//= EOF                                                                     =
//===========================================================================