Control scattered points with texture

   7236   4   1
User Avatar
Member
379 posts
Joined: 12月 2006
Offline
Is it possible to control, to delete for example, scattered points with texture?
Like here, where points are where texture is white and deleted where there are not. http://screencast.com/t/ea4IAWaXmkdk [screencast.com]

I did try PointMap but it mess transforms of emitter geometry.
Also tried with tex expression and Point SOP but than I need really dense geometry.
User Avatar
Member
299 posts
Joined: 1月 2010
Offline
You can use an attribute as scatter density on the scatter node. You can create that attribute with a texture lookup in a VOPSOP.
Drive, monkey, drive!
User Avatar
Member
379 posts
Joined: 12月 2006
Offline
Unfortunately that is bit over my present Houdini knowledge.

I manage to get decent results with Point SOP and tex expression, but texture that controls scatter and diffuse one do not match.
User Avatar
Member
299 posts
Joined: 1月 2010
Offline
Here is an example i whipped together with some Grants.

Attachments:
densityattributescatter.hipnc (61.5 KB)

Drive, monkey, drive!
User Avatar
Member
379 posts
Joined: 12月 2006
Offline
Thanks a lot for help, I will check that!.

I manage to fix issue with textures, I just had to use $MAPU and $MAPV variables instead default ones for tex parameters. And it works great.
  • Quick Links