[JAVA100ày]031?￠èy??á￠·?ì?
ê±??:2011-01-09
import java.awt.*;
import javax.swing.*;
public class Gr3d4a extends Gr3d1m {
/**
*<br>·?·¨?μ?÷￡o?÷·?·¨
*<br>ê?è?2?êy￡o
*<br>·μ??ààDí￡o
*/
??public static void main(String[] args){
???? Gr3d4a G3 = new Gr3d4a();
??}
/**
*<br>·?·¨?μ?÷￡o11?ì?÷
*<br>ê?è?2?êy￡o
*<br>·μ??ààDí￡o
*/
??public??Gr3d4a() {
????setTitle("3D cube box");
???? setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
???? addMouseListener(this);
???? addMouseMotionListener(this);
???? setBackground(new Color(128,128,255));
???? setSize(350,350);
???? show();
??}
/**
*<br>·?·¨?μ?÷￡o?????y·?ì?oD×ó￡?1y??Gr3d1m?Dμ?·?·¨
*<br>ê?è?2?êy￡o
*<br>·μ??ààDí￡o
*/
??public void drawPG(Graphics g,double []x,double []y,
???????????????????? double []z,int xp,int yp,Color co) {
???? double x1,y1,z0;
???? int len=x.length;
???? double [] xw=new double[len];
???? double [] yw=new double[len];
???? int????[] xx=new int?? [len];
???? int????[] yy=new int?? [len];
???? final double RAD=Math.PI/180.0;
???? double a=angX*RAD;
???? double b=angY*RAD;
???? double sinA=Math.sin(a),sinB=Math.sin(b);
???? double cosA=Math.cos(a),cosB=Math.cos(b);
???? for (int i=0; i<len; i++) {
????????x1= x[i]*cosB+z[i]*sinB;
????????z0=-x[i]*sinB+z[i]*cosB;
????????y1= y[i]*cosA-??z0*sinA;
????????xx[i]=xp+(int)Math.rint(x1);
????????yy[i]=yp-(int)Math.rint(y1);
????????xw[i]=x1; yw[i]=y1;
???? }
???? if (Hvec(xw,yw) > 0) {
????????g.setColor(co);
????????g.fillPolygon(xx,yy,len);//ì?3?μ??à±?D?
???? }
??}
/**
*<br>·?·¨?μ?÷￡o??ó°′|àí￡?è?1?????±??ú±???2?±?????
*<br>ê?è?2?êy￡o
*<br>·μ??ààDí￡o
*/
??double Hvec(double []x,double []y) {
????return(x[0]*(y[1]-y[2])+x[1]*(y[2]-y[0])+x[2]*(y[0]-y[1]));
??}
}
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