fast sphere-grid intersection

Posted by Mat on Stack Overflow See other posts from Stack Overflow or by Mat
Published on 2010-02-22T08:01:48Z Indexed on 2010/03/15 5:39 UTC
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algorithm

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intersection

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sphere

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grid

hi!

given a 3D grid, a 3d point as sphere center and a radius, i'd like to quickly calculate all cells contained or intersected by the sphere.

Currently i take the the (gridaligned) boundingbox of the sphere and calculate the two cells for the min anx max point of this boundingbox. then, for each cell between those two cells, i do a box-sphere intersection test.

would be great if there was something more efficient

thanks!

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