How can I make the background of my Processing sketch completely transparent?

javamacc

I am trying to make some sprites for a Python game I am creating. At first, I tried to use the alpha channel in Gimp 2, but I cannot even begin to understand how to use a drawing software. A computer language is much easier (go figure). Is there any way I can make the background of my sketch completely transparent so it will be a good sprite?

GoToLoop

http://py.Processing.org/reference/PGraphics.html
http://py.Processing.org/reference/clear.html

javamacc

How does the PGraphics work? Does it make the entire background transparent or just a selected area? I am confused with the syntax.

GoToLoop

• The main canvas is also a PGraphics. We can access it via this.getGraphics().
• However, the main canvas is always 100% opaque.
• But our own PGraphics objects start out as 100% transparent black.
• Function clear() erase the whole PGraphics w/ 100% transparent black again.

GoToLoop

How does the PGraphics work?

That is a fundamental Processing class. You should look up for it throughout the forum.
Some example: https://Processing.org/examples/creategraphics.html