I see people all around using right and center mousebuttons alot.. How do you suppose mac-people will interact with center and right mousebutton?
For those of you that don't know, mac users only have one mousebutton.

to get around this problem, you only have to use a keycheck instead. i.e:
Code:

void mousePressed(){
 if(keyPressed){
  if(keyCode == SHIFT){
   // clear screen or something
  }else if(keyCode == CONTROL){
   // reset objects or something
  }
 }
}
 

also look into this, if you want to check multiple keypresses at once.
http://www.processinghacks.com/hacks/multiplekeys

-seltar