java applet drawstar

畫星星函式

public void cad_drawstar(Graphics g,int x,int y,int r,int angle)
  {
        Graphics2D graph = (Graphics2D)g;
        double deg,temp1,temp2,temp3,temp4;
        deg=3.14159/180.0;
        double pt_x[] = new double[7]; //java 宣告陣列 格式
        double pt_y[] = new double[7];
        double ptt_x[] = new double[7];
        double ptt_y[] = new double[7];
        int i,j;
        for (i=0;i<7;i++){
          pt_x[i]=x+r*Math.sin(72.*deg*i+angle*deg); //sin cos 三角函數 使用格式 Math.
          pt_y[i]=y-r*Math.cos(72.*deg*i+angle*deg);
          temp1=Math.cos(54.*deg-72.*deg*i-angle*deg);
          temp2=Math.sin(54.*deg-72.*deg*i-angle*deg);
          temp3=Math.sin(18.*deg);
          temp4=Math.cos(36.*deg);
          ptt_x[i]=x+r*temp3*temp1/temp4;
          ptt_y[i]=y-r*temp3*temp2/temp4;
        }
        for (i=0;i<5;i++){
          graph.drawLine((int)pt_x[i],(int)pt_y[i],(int)ptt_x[i],(int)ptt_y[i]); 
          //graph.drawLine 內的點必須是 int 因此把double 等變數強制轉換
          j=i+1;
          graph.drawLine((int)ptt_x[i],(int)ptt_y[i],(int)pt_x[j],(int)pt_y[j]);
        }
    }

php call java in cmsimple

<?php
 function HelloWorldApp(){
  $output="<applet codebase=\"plugins/test\" code=\"HelloWorldApp\" height=\"500\" width=\"500\"></applet>";
  return $output;
 }
?>