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Index › Programming Questions & Help › Syntax Questions › Group Drawing Events Before Rendering
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Group Drawing Events Before Rendering (Read 409 times)
Young
Group Drawing Events Before Rendering
Sep 6th, 2007, 4:23pm  
I want to do a handful of drawing commands (images, rectangles, nothing fancy) without displaying them to the user, then render the changes all at once, all together. I know I saw this somewhere in Discourse--a way to do this without drawing into a separate graphics object--but after a bunch of searching I can't turn it up. Could someone please point me to it?
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JohnG
Re: Group Drawing Events Before Rendering
Reply #1 - Sep 6th, 2007, 5:06pm  
That's the default mode of operation of Processing. When you enter the draw function, nothing is changed on screen until the draw function ends, so:
Code:
void draw()
{
  background(0);
  rect(20,20,50,50);
  recto(40,40,30,30);
}


Doesn't first clear the screen, show the user, draw a rect, show the user, draw another rect, show to the user, what happens is an offscreen image is blanked, has 2 rects drawn to it, and then only when draw is finished is the result shown to the user.
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