java小应用程序_画图程序.txt

一个JAVA小应用程序

一个图形程序 

import java.awt.*; 
import java.applet.*; 

public class Wuerfel extends Applet { 

// 8 Eckpunkte 1-8 
// mit je 3 Koordinaten 1,2,3 
double p[][] = new double[9][4]; 

int x=1, y=2, z=3; 

public void init() { 
setBackground(new Color(255,255,255)); 


//构造图形 
p[1][x] = -100; p[1][y] = -100; p[1][z] = -100; 
p[2][x] = +100; p[2][y] = -100; p[2][z] = -100; 
p[3][x] = +100; p[3][y] = -100; p[3][z] = +100; 
p[4][x] = -100; p[4][y] = -100; p[4][z] = +100; 
p[5][x] = -100; p[5][y] = +100; p[5][z] = -100; 
p[6][x] = +100; p[6][y] = +100; p[6][z] = -100; 
p[7][x] = +100; p[7][y] = +100; p[7][z] = +100; 
p[8][x] = -100; p[8][y] = +100; p[8][z] = +100; 

// 8 - - - - - 7 
// / | / | 
// 5 - - - - - 6 | 
// | | | | 
// | 4 - - - -|- 3 
// | / | / 
// 1 - - - - - 2 
} 

// Rotationswinkel in rad 
double angle_x = 0.01; 
double angle_y = 0.0075; 
double angle_z = 0.005; 

Image buffer; 
Graphics2D gBuffer; 

public void paint(Graphics g) { 

// Double-Buffering 
if (buffer==null) { 
buffer=createImage(this.getSize().width, this.getSize().height); 
gBuffer=(Graphics2D)buffer.getGraphics(); 
} 
gBuffer.clearRect(0,0,this.getSize().width, this.getSize().height); 

// Antialiasing 
gBuffer.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); 

gBuffer.drawLine((int)(p[1][x])+200,(int)(p[1][y])+200,(int)(p[2][x])+200,(int)(p[2][y])+200); 
gBuffer.drawLine((int)(p[2][x])+200,(int)(p[2][y])+200,(int)(p[3][x])+200,(int)(p[3][y])+200); 
gBuffer.drawLine((int)(p[3][x])+200,(int)(p[3][y])+200,(int)(p[4][x])+200,(int)(p[4][y])+200); 
gBuffer.drawLine((int)(p[4][x])+200,(int)(p[4][y])+200,(int)(p[1][x])+200,(int)(p[1][y])+200); 
gBuffer.drawLine((int)(p[5][x])+200,(int)(p[5][y])+200,(int)(p[6][x])+200,(int)(p[6][y])+200); 
gBuffer.drawLine((int)(p[6][x])+200,(int)(p[6][y])+200,(int)(p[7][x])+200,(int)(p[7][y])+200); 
gBuffer.drawLine((int)(p[7][x])+200,(int)(p[7][y])+200,(int)(p[8][x])+200,(int)(p[8][y])+200); 
gBuffer.drawLine((int)(p[8][x])+200,(int)(p[8][y])+200,(int)(p[5][x])+200,(int)(p[5][y])+200); 
gBuffer.drawLine((int)(p[1][x])+200,(int)(p[1][y])+200,(int)(p[5][x])+200,(int)(p[5][y])+200); 
gBuffer.drawLine((int)(p[2][x])+200,(int)(p[2][y])+200,(int)(p[6][x])+200,(int)(p[6][y])+200); 
gBuffer.drawLine((int)(p[3][x])+200,(int)(p[3][y])+200,(int)(p[7][x])+200,(int)(p[7][y])+200); 
gBuffer.drawLine((int)(p[4][x])+200,(int)(p[4][y])+200,(int)(p[8][x])+200,(int)(p[8][y])+200); 

g.drawImage (buffer, 0, 0, this); 

//线程 
try {Thread.sleep(10);} 
catch (InterruptedException e) {} 

double px, py, pz; 

for (int i=1;i<9;i++) { 

px = p[i][x]; 
py = p[i][y]; 
pz = p[i][z]; 

// Rotation um x-Achse 
p[i][y] = py*Math.cos(angle_x)-pz*Math.sin(angle_x); 
p[i][z] = py*Math.sin(angle_x)+pz*Math.cos(angle_x); 

py = p[i][y]; 
pz = p[i][z]; 

// Rotation um y-Achse 
p[i][x] = px*Math.cos(angle_y)+pz*Math.sin(angle_y); 
p[i][z] =-px*Math.sin(angle_y)+pz*Math.cos(angle_y); 

px = p[i][x]; 

// Rotation um z-Achse 
p[i][x] = px*Math.cos(angle_z)-py*Math.sin(angle_z); 
p[i][y] = py*Math.cos(angle_z)+px*Math.sin(angle_z); 
} 

repaint(); 
} 

public void update(Graphics g) {paint(g);} 
}