Hi,

I started the following sketch: within a certain area ellipses are added in succession and move away instantly after they appear. The problem is, that EITHER they move away and the next ellipse isn´t drawn before the first one leaves the display window. OR every loop draws a new ellipse, the last one disappeares. The intention is to add new ellipses while the others move away undisturbed. Presumably the x-coordinate (or the ellipse-array?) has to be variable, so it won´t be extinguished by the next loop. But how could I do this?

Thanks for help!


int num = 10;
MyEllipse[] e = new MyEllipse[num];
int a = 30;
int b = 30;
int s;

void setup()
{
 size(400,400);
 
 e[1] = new MyEllipse(random(50,100),random(50,350),a,b);
 framerate (30);
 }
 
  void draw()
 {
   background (255);
   noStroke();
   fill(0,0,255,100);
   rect(50,50,100,300);
 
   int i=1; //EITHER
  //for(int i=0; i<10; i++){//OR
  //e[i] = new MyEllipse(random(50,100),random(50,350),a,b);//OR
   e[i].drawElli();
   e[i].x++;
   
   if (e[i].x-a > width)
   {
     e[i] = new MyEllipse(random(50,100),random(50,350),a,b);
    }
   // }//OR
   }
   
   void mousePressed()
   {
     if(mousePressed)
     {
       e[1] = new MyEllipse(random(50,100),random(50,350),a,b);
       }
     }
   
   class MyEllipse
   {
     float x, y, a, b;
     
     MyEllipse(float x, float y, float a, float b)
     {
       this.x = x;
       this.y = y;
       this.a = a;
       this.b = b;
       }
       
      MyEllipse(MyEllipse e)
       {
         if (e!=null)
         {
           x = e.x;
           y = e.y;
           }
         }
         
 void drawElli()
 {
   smooth();
   noStroke();
   fill(255,0,0);
   ellipse(e[1].x,e[1].y,a,b);
   }

     }

yippee!