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Index › Programming Questions & Help › Syntax Questions › Erasing PGraphics
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Erasing PGraphics (Read 540 times)
Christian S
Erasing PGraphics
Mar 10th, 2010, 11:57pm  
How do you erase a PGraphics object?

I draw some stuff on a PGraphics object and display the PGraphics with image(pg, 0, 0) on an animated background. Some frames later the PGraphics needs to be updated. I’d like to start again with an empty (all transparent!) PGraphics. How do you make a PGraphics all-transparent again?

Re-initalizing the object with pg = new PGraphics(...) doesn’t seem to work.

Any ideas?
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subpixel
Re: Erasing PGraphics
Reply #1 - Mar 11th, 2010, 12:51am  
I don't expect you used "new" to create the PGraphics object in the first place (you are not supposed to!); you can use createGraphics() again, or reuse the existing PGraphics object:

Code:
  pg.beginDraw();
  pg.background(0, 0); // grey level (black), alpha (transparent)
  // .. draw new content
  pg.endDraw();


-spxl
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Christian S
Re: Erasing PGraphics
Reply #2 - Mar 11th, 2010, 1:33am  
Everything working now!
Thanks!
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