[Sidefx-houdini-list] copy along normals
Edmond Earl Smith
ees041000 at utdallas.edu
Tue Apr 10 13:56:17 EDT 2007
You're right. I was shaving the length of the hairs with a bounding
box and I wasn't adjusting the pollen's position when copy stamping.
Was right in front of me.
Thanks a lot,
Rob Pieké wrote:
>* what exactly do you mean by "some areas that are slanted"?
>* how are you generating the hairs?
>You should be able to copy-stamp a Z translation which matches the hair
>length. Where you will run into trouble is in concave areas with high
>curvature, where the hairs will interpenetrate and the tips of some
>hairs will be inside the "volume" of other hairs. If this is the
>you're seeing and hoping to avoid, shifting the pollen further along
>normal will not necessarily alleviate the issue.
>> I had been messing with that before, and it does work for some of the
>> bee's anatomy. However, in some areas that are slanted the pollen
>> teeters so that you can't adjust it where some of the pollen isn't
>> dipping into the hairs and moving out too far to not be touching the
>> ends of the hairs. I thought that the answer might be copy stamping
>> the pollen but I can't figure how to move them out exactly along the
>> Rob Pieké wrote:
>>> Try moving your pollen sphere along the Z axis before copying them to
>>> the bee. That way the origin will be on the bee, and the spheres will
>>> offset (with the Z axis matching the bee's normal).
>>>> I have a model of a bee that has hairs copied to it. The hairs stand
>>>> out alog the normals. I also copied small pollen spheres to the bee.
>>>> I want to move each pollen outward along the normals so that they will
>>>> be at the ends of the hairs. I've tried several approaches but the
>>>> pollen doesn't move outward in the direction of the hairs they just
>>>> shift in each demension. Any ideas on how to get them to move out
>>>> the body in the exact direction of the normals (hairs).
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