Hi all,
I'm having a rather tough time trying to get a volume to displace.
I have attached a hip file with an example of the thing I'm trying to do. I have a volume shape that is quite detailed and there is an animation on the mountain SOP amplitude that I wish the volume to stick to and displace.
I have the feeling this should be easy, but I'm having no luck finding the answer.
Anyone have an idea how to do this?
Displace volume?
5171 2 2
-
- Anti-Distinctlyminty
- Member
- 271 posts
- Joined: March 2012
- Offline
-
- Anti-Distinctlyminty
- Member
- 271 posts
- Joined: March 2012
- Offline
I found a solution and I thought other newbies such as myself would like to know:
I have a noise to create the volume texture, and basically you cache the original positions on a point cloud, then get those to displace along with the geometry by (in this case) using a wire deformer. Then use a point cloud lookup to get the position to feed into the volume noise.
I have a noise to create the volume texture, and basically you cache the original positions on a point cloud, then get those to displace along with the geometry by (in this case) using a wire deformer. Then use a point cloud lookup to get the position to feed into the volume noise.
-
- jbudsberg
- Member
- 94 posts
- Joined: Aug. 2010
- Offline
since Houdini doesnt allow you to author new volume topology in a vop, I prefer to think about the problem as a reverse lookup.
1) create points that match your volume
2) store points' rest position, then perform the deformation
3) make a volume scratch space that you want to write to
4) iterate over the scratch space, use deformed points' rest position to look up the values in your original volume
1) create points that match your volume
2) store points' rest position, then perform the deformation
3) make a volume scratch space that you want to write to
4) iterate over the scratch space, use deformed points' rest position to look up the values in your original volume
-
- Quick Links