图形学作业（Java源码）

package com.odon.graphicsjob;




import java.awt.Color;


import java.awt.Dimension;


import java.awt.Font;


import java.awt.Graphics;


import java.awt.Graphics2D;


import java.awt.font.FontRenderContext;


import java.awt.geom.Rectangle2D;




import javax.swing.JPanel;






class BlankCanvas extends JPanel...{


Font font = new Font("SansSerif", Font.BOLD, 14);


FontRenderContext context = null;


private UIFrame uf = null;


String info = "Author : oDon";




public BlankCanvas(UIFrame _uf)...{


uf = _uf;


setPreferredSize(new Dimension(CANVAS_WIDTH, CANVAS_HEIGHT));


}








public void paintComponent(Graphics g)




...{


super.paintComponent(g);


Graphics2D g2 = (Graphics2D)g;


context = g2.getFontRenderContext();


Rectangle2D bounds = font.getStringBounds(info, context);


g2.setColor(Color.ORANGE);


g2.setFont(font);


g2.drawString(info, BLANK, CANVAS_HEIGHT - (int) bounds.getHeight());


}




private static final int CANVAS_WIDTH = 1024;




private static final int CANVAS_HEIGHT = 40;




private static final int BLANK = 20;


}



最近甚是忙啊，大四临近毕业 各种事情缠身啊。作业还是要做的，图形学是个很有意思的科目。老师布置的图形学作业，要按时完成。

想到还有几次图形学作业要交，所以写了一个框架。

下面公布下源码，框架已经写好了，采用状态机编写，Main.java包含了控制Layout的Frame, GraphicsCanvas是画板，JobSwitch是作业内容的切换，JobController是作业内容的控制，InfoPanel是作业内容的教学资料，BlankCanvas提供了一点信息，GraphicsUtil是作业实现的函数。

此代码将会不定期update,如果你有兴趣可以随便更改，每次更新GraphicsUtil里的几个函数添加响应的JButton就可以了，如果添加了新的图形学内容请发一份给我 yuanonline@hotmail.com


package com.odon.graphicsjob;




/** *//**


* @author oDon


* @version 0.1


* @description Homework of <Basic of Computer Graphics>,include :


* <p>Bresenham Line</p>


* <p>Bresenham Line</p>


* etc.


* The source code will update following the homework


* ---------------------------------------------------------------------


* | BlankCanvas(NORTH) |


* |


* |JobSwitch(WEST) GraphicsCanvas(CENTER) JobController(EAST) |


* | |


* | InfoPanel(SOUTH) |


* ----------------------------------------------------------------------


* */






import java.awt.BorderLayout;


import java.awt.Color;


import java.awt.Dimension;


import java.awt.Font;


import java.awt.Graphics;


import java.awt.Graphics2D;


import java.awt.Toolkit;


import java.awt.event.ActionEvent;


import java.awt.event.ActionListener;


import java.awt.font.FontRenderContext;


import java.awt.geom.Rectangle2D;




import javax.swing.JButton;


import javax.swing.JFrame;


import javax.swing.JMenu;


import javax.swing.JMenuBar;


import javax.swing.JMenuItem;


import javax.swing.JPanel;








public class Main ...{






/** *//**


* @param args


*/




public static void main(String[] args) ...{


UIFrame frame = new UIFrame();


frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


frame.setVisible(true);


}




}






class UIFrame extends JFrame...{




private String title = "<Basic of Computer Graphics>";




private BlankCanvas bc = new BlankCanvas(this);




private GraphicsCanvas gc = new GraphicsCanvas(this);




private JobSwitch js = new JobSwitch(this);




private JobController jc = new JobController(this);




private InfoPanel infoPanel = new InfoPanel(this);




private JMenu sys;




private JMenu menu;




private JMenu about;




private JMenuBar jmb;




private JMenuItem[] oper;




private JMenuItem exit;




private JMenuItem aboutBMS;




private Thread infoThread = null;




private Thread canvasThread = null;




private int len = 6;




private short preState = 0;




private short curState = 0;






public UIFrame()...{


setTitle(title);


Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();


setSize(screenSize);


initMenu();


setJMenuBar(jmb);


add(bc, BorderLayout.NORTH);


add(gc, BorderLayout.CENTER);


add(js, BorderLayout.WEST);


add(jc, BorderLayout.EAST);


add(infoPanel, BorderLayout.SOUTH);




infoThread = new Thread(infoPanel);


infoThread.start();




canvasThread = new Thread(gc);


canvasThread.start();


}




private void initMenu()




...{


sys = new JMenu();


menu = new JMenu();


about = new JMenu();


jmb = new JMenuBar();


oper = new JMenuItem[len];


sys.setText("System");


menu.setText("Operation");


about.setText("About");


exit = new JMenuItem();


aboutBMS = new JMenuItem();


for(int i = 0; i < len; i++)




...{


oper[i] = new JMenuItem();


}


oper[0].setText("draw Bresenham Line");


oper[1].setText("");


oper[2].setText("");


oper[3].setText("");


oper[4].setText("");


oper[5].setText("");


exit.setText("Quit");


aboutBMS.setText("About GT");


for(int i = 0; i < len; i++)




...{


menu.add(oper[i]);


}


sys.add(exit);


about.add(aboutBMS);


jmb.add(sys);


jmb.add(menu);


jmb.add(about);


}






public boolean stateChanged()




...{


curState = getCurrentState();


if(curState != preState)




...{


preState = curState;


return true;


}


return false;


}






protected synchronized void setCurrentState(short currentState) ...{


curState = currentState;


}






protected synchronized short getCurrentState() ...{


return curState;




}




}




package com.odon.graphicsjob;






import java.awt.Color;


import java.awt.Dimension;


import java.awt.Font;


import java.awt.Graphics;


import java.awt.Point;


import java.awt.event.MouseEvent;


import java.awt.event.MouseListener;


import java.awt.event.MouseMotionListener;




import javax.swing.JPanel;






class GraphicsCanvas extends JPanel implements Runnable, MouseMotionListener,




MouseListener ...{




private UIFrame uf = null;




private GraphicsUtil gu = new GraphicsUtil();




Font font = new Font("SansSerif", Font.BOLD, 32);




private Point p = new Point();




private boolean clicked = false;




private int level = 20;




private int x = 0;




private int y = 0;




private int[] pointX = null;




private int[] pointY = null;




private int clickCount = 0;




private boolean drawBresen = false;






public GraphicsCanvas(UIFrame _uf)...{


uf = _uf;


pointX = new int[2];


pointY = new int[2];


setPreferredSize(new Dimension(CANVAS_WIDTH, CANVAS_HEIGHT));


this.addMouseListener(this);


this.addMouseMotionListener(this);


}




public void paintComponent(Graphics g)




...{


super.paintComponent(g);


g.setColor(Color.ORANGE);


g.drawRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);


g.setColor(Color.DARK_GRAY);


for(int i = level; i < CANVAS_WIDTH; i+= level)


g.drawLine(i, 0, i, CANVAS_HEIGHT);


for(int i = level; i < CANVAS_HEIGHT; i+= level)


g.drawLine(0, i, CANVAS_WIDTH, i);


g.setColor(Color.MAGENTA);


g.setFont(font);


g.drawString("X:" + x / level + " Y:" + y / level, 0, 25);


switch(uf.getCurrentState())




...{


case States.BRESENHAM:


g.drawString("Bresenham Line", CANVAS_WIDTH >> 1, 25);


if(drawBresen)




...{


g.setColor(Color.ORANGE);


gu.drawBresenhamLine(g, pointX[0], pointY[0], pointX[1], pointY[1]);


g.drawString("(" + pointX[0] + "," + pointY[0] + ")", pointX[0],


pointY[0]);


g.drawString("(" + pointX[1] + "," + pointY[1]+ ")", pointX[1],


pointY[1]);




}


break;


}


clicked = false;


}






private static final int CANVAS_WIDTH = 800;




private static final int CANVAS_HEIGHT = 540;




@Override




public void run() ...{


while(true)




...{


repaint();


try




...{


Thread.sleep(100);


}


catch (InterruptedException e)




...{


e.printStackTrace();


}


}


}




@Override




public void mouseClicked(MouseEvent e) ...{


switch(uf.getCurrentState())




...{


case States.BRESENHAM:




...{


pointX[clickCount%2] = x;


pointY[clickCount%2] = y;


clickCount++;


if((clickCount != 0) && (clickCount == 2))




...{


drawBresen = true;


clickCount = 0;


}


else


drawBresen = false;


}


break;


}




}




@Override




public void mouseEntered(MouseEvent e) ...{




}




@Override




public void mouseExited(MouseEvent e) ...{




}




@Override




public void mousePressed(MouseEvent e) ...{




}




@Override




public void mouseReleased(MouseEvent e) ...{




}




@Override




public void mouseDragged(MouseEvent e) ...{




}




@Override




public void mouseMoved(MouseEvent e) ...{


x = e.getPoint().x;


y = e.getPoint().y;




}


}








package com.odon.graphicsjob;




import java.awt.Graphics;






public class GraphicsUtil ...{


public void drawPoint(Graphics g, int x, int y)




...{


g.drawLine(x, y, x, y);


}




public void drawBresenhamLine(Graphics g, int stX, int stY, int edX, int edY)




...{


int x = 0;


int y = 0;


int d = 0;


int dx =0;


int dy = 0;


int upIncre = 0;


int downIncre = 0;


if(stX > edX)




...{


stX = stX ^ edX;


edX = stX ^ edX;


stX = edX ^ stX;




stY = stY ^ edY;


edY = stY ^ edY;


stY = edY ^ stY;


}


x = stX;


y = stY;


dx = edX - stX;


dy = edY - stY;


d = dx - (dy << 1);


upIncre = (dx - dy) << 1;


downIncre= -(dy << 1);


while(x < edX)




...{


drawPoint(g, x, y);


x++;


if(d < 0)




...{


y++;


d += upIncre;


}


else


d += downIncre;


}


}


}




package com.odon.graphicsjob;




import java.awt.Color;


import java.awt.Dimension;


import java.awt.Font;


import java.awt.Graphics;




import javax.swing.JPanel;






class InfoPanel extends JPanel implements Runnable




...{


private UIFrame uf = null;


private int width = 0;


private int width2 = 0;


private int height = 0;


private int len = 280;


private boolean draw1 = true;


public InfoPanel(UIFrame _uf)




...{


uf = _uf;


this.setPreferredSize(new Dimension(1024, 100));


this.setBackground(Color.LIGHT_GRAY);


}




public void paintComponent(Graphics g)




...{


super.paintComponent(g);


g.setFont(new Font("宋体", 1, 24));


g.setColor(new Color(0x3f7fff));


if(draw1)




...{


g.drawString("添加讲解功能(未完善)", width, getHeight() >> 1);


}


width += 20;


if(width >= this.getWidth())




...{


width = -len;


}


}




@Override




public void run() ...{


while(true)




...{




try ...{


Thread.sleep(500);




} catch (InterruptedException e) ...{


e.printStackTrace();


}


this.repaint();


}


}


}


package com.odon.graphicsjob;




import java.awt.Color;


import java.awt.Dimension;


import java.awt.Graphics;




import javax.swing.JButton;


import javax.swing.JPanel;






class JobController extends JPanel...{




private JButton refresh = new JButton("Refresh");




private UIFrame uf = null;






public JobController(UIFrame _uf)...{


uf = _uf;


setPreferredSize(new Dimension(WIDTH, HEIGHT));


setBackground(Color.LIGHT_GRAY);


add(refresh);


}




public void paintComponent(Graphics g)




...{


super.paintComponent(g);


g.drawRect(0, 0, WIDTH, HEIGHT);


}




private static final int WIDTH = 110;




private static final int HEIGHT = 600;


}


package com.odon.graphicsjob;




import java.awt.Color;


import java.awt.Dimension;


import java.awt.Graphics;


import java.awt.event.ActionEvent;


import java.awt.event.ActionListener;




import javax.swing.JButton;


import javax.swing.JPanel;








class JobSwitch extends JPanel implements ActionListener...{




private JButton bresen = new JButton("Bresenham");




private UIFrame uf = null;






public JobSwitch(UIFrame _uf)...{


uf = _uf;


setPreferredSize(new Dimension(WIDTH, HEIGHT));


setBackground(Color.LIGHT_GRAY);


add(bresen);


bresen.addActionListener(this);


}




public void paintComponent(Graphics g)




...{


super.paintComponent(g);


g.drawRect(0, 0, WIDTH, HEIGHT);


}






private static final int WIDTH = 110;




private static final int HEIGHT = 600;




@Override




public void actionPerformed(ActionEvent e) ...{


Object source = e.getSource();




if(source == bresen)...{


uf.setCurrentState(States.BRESENHAM);


}


}


}




package com.odon.graphicsjob;






public class States ...{


public static final short INIT = 0;




public static final short BRESENHAM = 1;


}