On 05/09/2017 01:51 AM, omniverse wrote:
> Simple example of sphere_sweep cubic spline problem I told of earlier, if
> rendered using beta 6. Does not show same in official 3.7 or previous beta 5.
>
> /* begin */
...
> /* end */
>
>
>
Thanks for the test scene. I've added it to a small collection of 
problem sphere_sweeps I have going. Also helpful to see you trying such 
a large value for tolerance and getting a better result. I'd always 
followed the documentation with respect to magnitude suggestions and had 
never seen tolerance affect much.

Christoph backed out a fix in beta 6 which caused other problems but 
made sphere_sweep artifacts like yours better. I thrashed around in this 
code yesterday without much luck. Starting to think completely fixing 
things here may require changes in the core solver - that sphere_sweep 
issues might be tangled somewhat in the tiny discontinuities we see in 
other objects at times due scale and ray/surface/coordinate inflections.

The great news is Christoph fixed ALL the sphere_sweep auto-bounding 
issues I have in hand in beta 6! The auto-bounding issue has dogged 
sphere_sweeps from day one with this object.

Bill P.

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