Grid traversal by an inflated ray/swept circle.

Amanatides and Wu’s “A Fast Voxel Traversal..” http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.42.3443&rep=rep1&type=pdf​ is great for stepping through a grid along a ray, however it only works for infinitely thin rays – I’m trying to sweep a circle through a grid, and I can’t find any similar algorithm for swept-circles.

AFA

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