Java 窗口 繪製圖形 #1

寫在前面：

　　editplus換成eclipse了

　　Sketchpad要錢，買不起

　　本身搞(rua)

by emeralddarkness

　　創建了一個平面直角座標系

　　兩個變元x，y，參數i

　　實現瞭如下功能：

　　　　調節窗口大小

　　　　放縮單位長度

　　　　改變原點位置

　　　　改變參數方程

　　離超過Sketchpad還有十萬八千里路要走呃呃呃

 

　　運行效果：

1     static double ponyX(double i){ 2         return 4*Math.sin(i); 3  } 4     static double ponyY(double i){ 5         return 6*Math.cos(i); 6     }

 

1     static double ponyX(double i){ 2         return 4/Math.cos(i); 3  } 4     static double ponyY(double i){ 5         return 6*Math.tan(i); 6     }

 

1     static double ponyX(double i){ 2         return i; 3  } 4     static double ponyY(double i){ 5         return i*i-i*4+2; 6     }

 

1     static double ponyX(double i){ 2         return i; 3  } 4     static double ponyY(double i){ 5         return i*4+5; 6     }

 

1     static double ponyX(double i){ 2         return 4*Math.sin(i)+2; 3  } 4     static double ponyY(double i){ 5         return 4*Math.cos(i)+3; 6     }

 

　　還能畫出來各類奇奇怪怪的圖形，好比說鬍子

 

代碼以下：

 1 import java.awt.*;  2 import java.awt.event.*;  3 import java.awt.Graphics;  4 import java.io.*;  5 import java.util.*;  6 import javax.swing.ImageIcon;  7 import javax.swing.JFrame;  8 import javax.swing.JPanel;  9 
10 public class PonysAlgorithm extends JFrame 11 { 12     static int winX=800,winY=600; 13     static int ponyIE=30; 14     static int zeroX=winX/2,zeroY=winY/2; 15     static int ponyPrecision=100; 16     
17     static double ponyX(double i){ 18         return 4*Math.sin(i)+2; 19  } 20     static double ponyY(double i){ 21         return 4*Math.cos(i)+3; 22  } 23     
24     public static void main(String[] args) throws Exception 25  { 26         JFrame ponyFrame=new JFrame("Pony's Algorithm"); 27         ponyFrame.setLayout(null); 28         JPanel ponyJPanel=new JPanel(){ 29             public void paint(Graphics g){ 30                 super.paint(g); 31                 
32  g.setColor(Color.GRAY); 33                 /*Coordinate Axis*/
34                 g.drawLine(zeroX, 0, zeroX, winY); 35                 g.drawLine(0, zeroY, winX, zeroY); 36                 
37                 for(int i=zeroX+ponyIE;i<=winX;i+=ponyIE) 38                     g.drawLine(i, zeroY-5, i, zeroY+5); 39                 for(int i=zeroX-ponyIE;i>0;i-=ponyIE) 40                     g.drawLine(i, zeroY-5, i, zeroY+5); 41                 for(int i=winY+ponyIE;i<=winY;i+=ponyIE) 42                     g.drawLine(zeroX-5, i, zeroX+5, i); 43                 for(int i=winY-ponyIE;i>0;i-=ponyIE) 44                     g.drawLine(zeroX-5, i, zeroX+5, i); 45                 
46                 for(int i=1;zeroX+i*ponyIE<winX;++i) 47                     g.drawString(""+i, zeroX+i*ponyIE-4, zeroY+20); 48                 for(int i=-1;zeroX+i*ponyIE>0;--i) 49                     g.drawString(""+i, zeroX+i*ponyIE-4, zeroY+20); 50                 for(int i=1;zeroY+i*ponyIE<winY;++i) 51                     g.drawString(""+(-i), zeroX-25, zeroY+i*ponyIE+4); 52                 for(int i=-1;zeroY+i*ponyIE>0;--i) 53                     g.drawString(""+(-i), zeroX-25, zeroY+i*ponyIE+4); 54                 
55  g.setColor(Color.BLACK); 56                 /*CORE*/
57                 int tmpa,tmpb; 58                 for(int i=-10000;i<=10000;++i) 59  { 60                     tmpa=(int)(ponyX(i/(double)ponyPrecision)*ponyIE)+zeroX; 61                     tmpb=(int)(-ponyY(i/(double)ponyPrecision)*ponyIE)+zeroY; 62  g.drawLine(tmpa, tmpb, tmpa, tmpb); 63  } 64  } 65  }; 66         
67         /*Whole*/
68  ponyFrame.setSize(winX,winY); 69         ponyFrame.setResizable(false); 70         ponyFrame.setLocationRelativeTo(null); 71         ponyFrame.addWindowListener(new PonyWinAdapter()); 72         
73         /*ICON*/
74         File directory = new File(""); 75         ponyFrame.setIconImage(Toolkit.getDefaultToolkit().getImage(directory.getCanonicalPath()+"\\icons\\32.png")); 76         
77         /*DRAW*/
78         ponyJPanel.setBounds(2, 2, winX-10, winY-10); 79  ponyFrame.add(ponyJPanel); 80         
81         
82         ponyFrame.setVisible(true); 83         return; 84  } 85 } 86 
87 class PonyWinAdapter extends WindowAdapter 88 { 89     public void windowClosing(WindowEvent windowEvent){ 90         System.exit(0); 91         return; 92  } 93 }

 

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