// —§•û‘̂̉ñ“](ƒ}ƒEƒX‚ʼnñ“])�y“§Ž‹“Š‰e�z [Gr3d1b.java]
 import java.awt.*;
 public class Gr3d1b extends Gr3d1m {         // Gr3d1m‚ðŒp�³
  //===== ‘½ŠpŒ`‚ð•`‚­�y“§Ž‹“Š‰e�zxp:x‚̈ʒu, yp:y‚̈ʒu =====
  public void drawPG(Graphics g,double []x,double []y,
                     double []z,int xp,int yp,Color co) {
     double x1,y1,z0,z1;   //(*)  “§Ž‹“Š‰e
     double s=400,d=500;   //(*a) “§Ž‹“Š‰e
     int len=x.length;     // ”z—ñ‚Ì‘å‚«‚³
     int [] xx=new int [len];
     int [] yy=new int [len];
  //!final double RAD=Math.PI/180.0;           // ƒ‰ƒWƒAƒ“‚É•ÏŠ·
     double RAD=Math.PI/180.0;                 //!ƒ‰ƒWƒAƒ“‚É•ÏŠ·
     double a=angX*RAD;                        // xŽ²‚̉ñ“]Šp
     double b=angY*RAD;                        // yŽ²‚̉ñ“]Šp
     double sinA=Math.sin(a),sinB=Math.sin(b); // ŠÖ�”‚ÌŒvŽZ
     double cosA=Math.cos(a),cosB=Math.cos(b); // ŠÖ�”‚ÌŒvŽZ
     for (int i=0; i<len; i++) {
        x1= x[i]*cosB+z[i]*sinB;  // x1‚̈ʒu
        z0=-x[i]*sinB+z[i]*cosB;
        y1= y[i]*cosA-  z0*sinA;  // y1‚̈ʒu
        z1= y[i]*sinA+  z0*cosA;  //(*b) z1‚̈ʒu
        x1=s/(d-z1)*x1;           //(*c) “§Ž‹“Š‰e
        y1=s/(d-z1)*y1;           //(*c) “§Ž‹“Š‰e
        xx[i]=xp+(int)Math.rint(x1);
        yy[i]=yp-(int)Math.rint(y1);
     }
     g.setColor(co);              // �F‚Ì�Ý’è
     g.drawPolygon(xx,yy,len);    // ‘½ŠpŒ` ƒ�ƒCƒ„ƒtƒŒ�[ƒ€
  } //end drawPG
} //end Gr3d1b