[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,
Eddie


Rob Pieké wrote:


>For clarification:
>* 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 
problem 
>you're seeing and hoping to avoid, shifting the pollen further along 
the 
>normal will not necessarily alleviate the issue.
>
>Cheers!
>
>
>> 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 
>> normal.
>> 
>> thanks,
>> Eddie
>> 
>> 
>> 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 
>> be 
>>> offset (with the Z axis matching the bee's normal).
>>>
>>> Cheers!
>>>
>>>
>>>> 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 
>> from 
>>>> the body in the exact direction of the normals (hairs).
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>> 
>> 
>> 
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