Beginner's problem with while() loop

Processing Coding Questions
1

I just want to do a simple grid with circles, but it just doesn’t work. The circles don’t complete the grid and stop at a random point. The circles stop at a different point each time I run the program. Pls help.
I’m using 3.5.4 btw.

float x = 0;
float y = 0;
boolean a = true;

void setup()
{
  size(800, 800);
}

void draw()
{
  background(0);
  
  while(a)
  {
    ellipse(x, y, 50, 50);
    
    x= x+100;
    
    if(x > width)
    {
      y = y + 100;
      x = 0;
    }
    
    if(y > height)
    {
       y=0;
    }
    
    
    println("x", x, "y", y);
  }

   
   
}
2

a never gets false

what about

while(y<height) …

And get rid of this

3

Not working :(, the grid appears for a frame and disappears forever. But still thx!

4

That’s right.

Place these lines AFTER the while loop

Hey and welcome to the forum!

Great to have you here!

Warm regards,

Chrisir

Example



float x = 0;
float y = 0;

void setup()
{
  size(800, 800);
}

void draw()
{
  background(0);

  while (y <= height)
  {
    ellipse(x, y, 50, 50);

    x = x+100;

    if (x > width)
    {
      y = y + 100;
      x = 0;
    }

    println("x", x, "y", y);
  }// closing while loop 

  // reset 
  x=0;
  y=0;
}//closing function draw() 
//
1 Like
5

Thx for the help!!!

1 Like
6

You are welcome!

Chrisir