Adam M.
AdamuKv
About Me
EXPERTISE
VFX Artist
INDUSTRY
Film/TV
Connect
LOCATION
Serbia
WEBSITE
Houdini Skills
Availability
Not Specified
Recent Forum Posts
Creating static points on deforming and splitting geo Nov. 27, 2019, 11:24 a.m.
Nobody? 
Creating static points on deforming and splitting geo Nov. 21, 2019, 9:04 a.m.
Ok, please help. I cannot find a way to select scattered points on a changing geo without getting completely new ones in the group after the geo deforms/splits.
To give you reference, I have a sphere (cell) which will split into two halves (2 separate geos), close the seams (adding new prims/points) and themselves becoming 2 different spheres. After that, again splitting into 4 spheres and so on.
I've added random points on mother sphere and I want them to remain the same after splitting. I've tried many - as I thought - good ideas, such as:
- enumerate SOP to have id attribute for each point and group expression node to select 20% of them - but as soon as splitting occurs, IDs of the right half of mother sphere change and I get another set of points
- point generate + VEX to center points to primitives and using them - but the same thing occurs as above
- time-shifting rest mother sphere, copying points to wires from ends SOP and using att interpolate together with sourceprimuv - no luck, the scattered points immediately jump to closed seam side of the left sphere.
- uv texture each sphere (I have separate ids for each geo generated) and scattering using texture space - it basically works, but several crucial points jitter and mirror disappear/appear during sphere moving and splitting.
It is probably a noob problem, since I am not a Houdini/VEX expert, but there is surely an easy way to achieve this and I'm too tired
To give you reference, I have a sphere (cell) which will split into two halves (2 separate geos), close the seams (adding new prims/points) and themselves becoming 2 different spheres. After that, again splitting into 4 spheres and so on.
I've added random points on mother sphere and I want them to remain the same after splitting. I've tried many - as I thought - good ideas, such as:
- enumerate SOP to have id attribute for each point and group expression node to select 20% of them - but as soon as splitting occurs, IDs of the right half of mother sphere change and I get another set of points
- point generate + VEX to center points to primitives and using them - but the same thing occurs as above
- time-shifting rest mother sphere, copying points to wires from ends SOP and using att interpolate together with sourceprimuv - no luck, the scattered points immediately jump to closed seam side of the left sphere.
- uv texture each sphere (I have separate ids for each geo generated) and scattering using texture space - it basically works, but several crucial points jitter and mirror disappear/appear during sphere moving and splitting.
It is probably a noob problem, since I am not a Houdini/VEX expert, but there is surely an easy way to achieve this and I'm too tired
Houdini won't load .OBJ files Feb. 9, 2018, 6:45 p.m.
Ok, opened a shell window via Houdini (cmd) and tried gwavefront to convert to and from .obj/.bgeo - it works without issues… So I'm guessing main program has some issues calling external apps.
Houdini won't load .obj derived this way (source .obj -> .bgeo -> .obj), but I can load the .bgeo, which will suffice for now.
It's still not fixed and I would like to know at least why it isn't working.
This is the converted .obj, which now looks ok:
Thanks again ndickson for your time!
Houdini won't load .obj derived this way (source .obj -> .bgeo -> .obj), but I can load the .bgeo, which will suffice for now.
It's still not fixed and I would like to know at least why it isn't working.
This is the converted .obj, which now looks ok:
# File exported by Houdini 16.5.323 (www.sidefx.com) # 8911 points # 30066 vertices # 10022 primitives # Bounds: [-165.950775, -15.8894215, -177.267975] to [150.687927, 326.117096, 124.150085] g v -8.09147644 -6.00000021e-06 -1.60949504 v -8.33779907 -9.99999975e-06 -2.52924299 ...
Thanks again ndickson for your time!