How to reset a PGraphics ?

Core Library Questions

fouchtre

in Core Library Questions • 10 months ago

Hello !

I would like to animate something inside a PGraphics (with a transparent background) but I don't find any way to reset totally a PGraphics instance. I would like to apply a transparentBackground that erase all the content I have inside the PGraphics.

The only way I found is to create a new PGraphics for each frame, but it take immediatly too much memory and crashes.

Do you think it's possible to add the "reset-feature" in the next release ? It could be very helpful.

Thanks !

Replies(4)

amnon.owed

Re: How to reset a PGraphics ?

10 months ago

This can already be done, both in Processing 1.5.1. and 2.0b7 with the line:

pg.background(0, 0); // where pg is the PGraphics instance

fouchtre

Re: How to reset a PGraphics ?

10 months ago

Oh my God ! It works !

Thanks a lot !

I 'm so happy !

Youhou !!!

fouchtre

Re: How to reset a PGraphics ?

10 months ago

Actually it works as expected when there is something already drawn inside the PGraphics, but it send me an error message when I apply a 'background(0,0)' directly after creating the PGraphics.

It's not really a big problem , but it's a good thing to know

(My poor solution is to add a beginDraw-beginShape-endShape-endDraw directly after the creation of the PGraphics instance, just to be certain that there is something to erase ; and it works perfectly)

PhiLho

Re: How to reset a PGraphics ?

10 months ago

No need for begin/endShape, only begin/endDraw are necessary to draw on a PGraphics.

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