图形学 实验报告格式2009(单次实验报告首页)_1.doc

实 验 报 告课程名称 计算机图形学 实验名称 二维绘图 姓 名 李欣 学 号 200707040226 专业班级 软件0702 实验日期 2010 年 11 月 5 日 成绩 指导教师 一、 实验目的1. 实现用Besenham或DDA 方法绘制直线、圆或椭圆及绘制Bezier曲线和B样条曲线。掌握基本图形的绘制算法2. 实现多义线、手绘线、矩形、多边形的绘制3. 实现区域填充及取消填充4. 了解图形的选择、旋转、平移、缩放的原理与方法。二、 实验环境Windows XP 系统 JCreaetor pro 三、 实验内容与步骤(可提供屏幕抓图)1.【文件】-【新建】-【File】 建立一个Java.class文件，如图2.类名命名为huitu 选择存放路径，点击确实出现代码编辑区，如图：3.在代码编辑区输入以后代码：部分代码如下：调用glTrantlatef() 实现图形的平移调用glRotatef（）实现图形的旋转import javax.swing.*;import javax.swing.filechooser.FileNameExtensionFilter;import java.awt.*;import java.awt.event.*;import java.awt.image.BufferedImage;import javax.imageio.ImageIO;/这个类实现图像的打开和保存public class Huatu extends JPanel implements MouseListener,MouseMotionListener, ActionListener private JFrame f2, f1;private int xBegin = 0, yBegin = 0, xEnd = 0, yEnd = 0;/ 开始和结束点坐标private JButton btReLine, btRect, btOval, btPen, btEraser;/ 线，方，圆private JToolBar tb;private int i = 0;/ 0,直线;1方;2,圆;3/ 最后的图形要保存下来，使用缓冲图像private BufferedImage bImage;private Graphics gg;/ 图像专用画笔private JFileChooser jfc;private JButton btSave, btOpen, btAbout;private JButton btColor;/ 选择颜色private Color myColor;private Label label1;public Huatu() / BufferedImage.TYPE_INT_RGB 图像类型 标准的三基色bImage = new BufferedImage(800, 600, BufferedImage.TYPE_INT_RGB);f2 = new JFrame(简单画图板);btReLine = new JButton(直线);btRect = new JButton(矩形);btOval = new JButton(圆);btAbout = new JButton(关于作者);btSave = new JButton(Save(保存);btOpen = new JButton(Open(打开);tb = new JToolBar();jfc = new JFileChooser();FileNameExtensionFilter filter = new FileNameExtensionFilter(JPG,jpg);jfc.setFileFilter(filter);btColor = new JButton(选择颜色);myColor = Color.BLACK;/ 默认颜色黑色btColor.setBackground(Color.RED);/ 因为缓冲图像是刚创建的，所以默认颜色是黑色/ 得到图像专用画笔gg = bImage.getGraphics();gg.setColor(Color.white);/ 将画笔调整为白色gg.fillRect(0, 0, 800, 600);/ 将图像涂白gg.setColor(Color.BLACK);/ 将画笔从新调成黑色tb.add(btReLine);tb.add(btRect);tb.add(btOval);tb.add(btOpen);tb.add(btSave);tb.add(btColor);tb.add(btAbout);btReLine.addActionListener(this);btRect.addActionListener(this);btOval.addActionListener(this);btAbout.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e) About_me(););btOpen.addActionListener(this);btSave.addActionListener(this);btColor.addActionListener(this);this.setLayout(new BorderLayout();this.add(tb, BorderLayout.NORTH);this.addMouseListener(this);this.addMouseMotionListener(this);f2.add(this);f2.setBounds(200, 200, 800, 600);f2.setVisible(true);f1 = new JFrame(关于作者);setLayout(new FlowLayout(FlowLayout.CENTER, 20, 20);f1.add(new Label( 此程序由软件0702-王凯 编写);f1.setLayout(new GridLayout(1, 1);f1.setFont(new Font(宋体, 15, 15);f1.pack();f1.setBounds(400, 400, 400, 100);f1.setResizable(false);f1.show();f1.setVisible(false);f1.addWindowListener(new java.awt.event.WindowAdapter() public void windowClosing(java.awt.event.WindowEvent e)f1.setVisible(false););public void About_me() f1.setVisible(true);public void paintComponent(Graphics g) / 设置画笔颜色g.setColor(myColor);/ 手工强制清空面板super.paintComponent(g);/ 为了能够看到最终效果，所以将缓冲图像也画到面板上g.drawImage(bImage, 0, 0, null);if (i = 0)/ lineg.drawLine(xBegin, yBegin, xEnd, yEnd);else / 其他图形需要判断起始点和宽高int x, y, width, height;if (xBegin xEnd)x = xEnd;elsex = xBegin;if (yBegin yEnd)y = yEnd;elsey = yBegin;width = Math.abs(xBegin - xEnd);/ abs取绝对值height = Math.abs(yBegin - yEnd);if (i = 1)/ rectg.drawRect(x, y, width, height);else if (i = 2)/ ovalg.drawOval(x, y, width, height);public static void main(String args) new Huatu();public void mouseClicked(MouseEvent e) public void mousePressed(MouseEvent e) / 按下鼠标的时候，记录开始点的坐标this.xBegin = e.getX();this.yBegin = e.getY();public void mouseReleased(MouseEvent e) / 松开鼠标，确认最终的图形需要保存在缓冲图像上if (i = 0)gg.drawLine(xBegin, yBegin, xEnd, yEnd);else / 其他图形需要判断起始点和宽高int x, y, width, height;if (xBegin xEnd)x = xEnd;elsex = xBegin;if (yBegin yEnd)y = yEnd;elsey = yBegin;width = Math.abs(xBegin - xEnd);/ abs取绝对值height = Math.abs(yBegin - yEnd);if (i = 1)/ rectgg.drawRect(x, y, width, height);else if (i = 2)/ ovalgg.drawOval(x, y, width, height);public void mouseDragged(MouseEvent e) / 记录拖动的时候的结束点this.xEnd = e.getX();this.yEnd = e.getY();/ 每次拖动，都需要重绘面板，显示最的图形this.repaint();public void mouseEntered(MouseEvent e) public void mouseExited(MouseEvent e) public void mouseMoved(MouseEvent e) public void actionPerformed(ActionEvent e) if (e.getSource() = this.btReLine)/ 线i = 0; else if (e.getSource() = this.btRect)/ 方i = 1; else if (e.getSource() = this.btOval)/ 圆i = 2;else if (e.getSource() = this.btOpen)/ 打开int i = jfc.showOpenDialog(this.f2);if (i = JFileChooser.APPROVE_OPTION) try / 将文件图像加载到内存中bImage = ImageIO.read(jfc.getSelectedFile();/ 更换图像以后，画笔也必须更换为新的画笔gg = bImage.getGraphics();/ 画笔默认白色gg.setColor(myColor);/ 为了防止打开图片以后，出现一个乱图，处理一下this.xBegin = 100;this.yBegin = 0;this.xEnd = 0;this.yEnd = 0;this.repaint(); catch (Exception ex) ex.printStackTrace(); else if (e.getSource() = this.btSave)/ 保存int i = jfc.showSaveDialog(this.f2);if (i = JFileChooser.APPROVE_OPTION) t