ぽぃ - プログラム倉庫

import java.awt.*;
import java.awt.event.*;
import java.awt.Graphics;
class pro extends Frame {

   public static void main(String [] args) { 
       Frame f=[[new]] pro(); 
       f.setTitle("pro"); 
       f.setSize(700,700); 
       f.setBackground(Color.yellow); 
       f.setVisible(true); 
   } 

pro(){addWindowListener(new stopwin());}
class stopwin extends WindowAdapter{

   public void windowClosing(WindowEvent we){System.exit(0);} 
   } 

public void paint(Graphics g){

int x1,y1,z1;
int px,py;
int x[]=new int[3];
int y[]=new int[3];

x1=0;
y1=0;
z1=500;
px=pointx(x1,y1,z1);
py=pointy(x1,y1,z1);
g.drawLine(100,600,100+px,600-py);

x1=500;
y1=0;
z1=0;
px=pointx(x1,y1,z1);
py=pointy(x1,y1,z1);
g.drawLine(100,600,100+px,600-py);

x1=0;
y1=500;
z1=0;
px=pointx(x1,y1,z1);
py=pointy(x1,y1,z1);
g.drawLine(100,600,100+px,600-py);

g.setColor(Color.red);
x[0]=600;
x[1]=500;
x[2]=300;
y[0]=100;
y[1]=200;
y[2]=300;
g.fillPolygon(x,y,3);

}

public static int pointy(double x,double y,double z){
int p2;
double theta,phi;
theta=-0.222222*Math.PI;
phi=0.333333*Math.PI;
p2=(int)(-Math.cos(theta)*Math.cos(phi)*x-Math.sin(theta)*Math.cos(phi)*y+Math.sin(phi)*z);
return p2;
}

public static int pointx(double x,double y,double z){
int p1;
double theta;
theta=-0.222222*Math.PI;
p1=(int)(-Math.sin(theta)*x+Math.cos(theta)*y);
return p1;
}

}