How to add/remove a shape with a key press in Processing?

blindislands

I want to add/remove an ellipse using a press of a button in Processing. I use void keyPressed() and void keyReleased() for the keys. But how can I use if statements to add/remove an ellipse? Please give me some hints. Thank you.

PhiLho

Moved to How To category, seems fitting given your subject line...

Have a global variable, a boolean. Set it to true in keyPressed, to false in keyReleased, for example (or make it to toggle in keyPressed).

Draw the ellipse in draw(), depending on this variable:

if (mustHide) // The global boolean
{
  ellipse( ... ); // Your call here
}

Chrisir

solved?