One of the possibilities I've been mulling over is converting the general
case to a specific one at parse time. You could, for example, make a voxel
version of it.
There would naturally be a dramatic loss in precision but the specific case
would only be used for quickly calculating further distances. When a point
in question is found to be close to a surface the code would switch to the
slower general case, but at least with the advantage of knowing in which
general direction the near surface can be found.
- Jeff
jef### [at] mmlive com
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