draw.aacircle()

[mzivic7]

Pygame-ce has only gfxdraw.aacircle function for drawing antialiased circles, but it has several problems:

• It's arguments are different from draw.circle
• It does not accept float as input
• It can't draw circle quadrants
• There is no line thickness option Related issue: #2463
• Draws incorrect lines when radius is larger than about 1000 Related issue: #2450

and it is intended to be deprecated/removed in future.

All these problems are fixed in draw.aacircle, that is implemented in this commit.

Changes:

• Added draw.aacircle function that has same inputs and outputs as draw.circle
• Added algorithms for drawing thin and thick antialiased circles, adapted from: https://cgg.mff.cuni.cz/~pepca/ref/WU.pdf
• Added to documentation
• Added to code_examples
• Added to tests