Pixel-perfect Sprite Collisions

In addition to the animation support last post, I have just added limited pixel-perfect collision detection between arbitrary pyglet sprites. You can see the results in the video, right after the break.

The collision detection only handles un-scaled, un-rotated sprites for the moment, but does handle animation. It first performs a rectangle-rectangle check to ensure fast rejection of non-overlapping sprites, and then takes the intersection of the bounding rectangles to minimise pixels tested.

So far it seems to be reasonably fast, despite being implemented entirely in un-optimised python. The example shown below performs several collision checks per frame, and still runs at a handy 60 fps.


  1. That’s awesome, I’ve just begun to look into coding in pyglet and was wondering if someone had written any modules for pixel perfect collision. Sick demo.

  2. Pingback: Sprite collision revisited « swiftcoding

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