As from title I'm trying to export at every frame the vertex point positions of a Vellum mesh, but really messing around with nodes like CSV Output and CSV Exporter where I really didn't understand what I'm doing.
Attached the best example I was able to create, wanted to kindly ask some guidance.
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Houdini Indie and Apprentice » Export Vellum vertex positions to CSV
- davide445
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Technical Discussion » Export tetrahedron nodes coordinates and connectivity
- davide445
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To give an example here [people.sc.fsu.edu] there are some test files (i.e. mesh3d) depicting how the two files need to be formatted.
Wanted to ask if anyone has the Python or Houdini SDK experience to understand how complex can be this activity and define a quotation for a consulting work.
As alternative path can be to map Houdini native .geo format into gmsh .msh [gmsh.info] format.
Wanted to ask if anyone has the Python or Houdini SDK experience to understand how complex can be this activity and define a quotation for a consulting work.
As alternative path can be to map Houdini native .geo format into gmsh .msh [gmsh.info] format.
Technical Discussion » Export tetrahedron nodes coordinates and connectivity
- davide445
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Generated with tet embed a beautiful mesh
Your text to link here... [imgur.com]
I want to export it.
Asking some guidance to generate these two files:
mesh_nodes.txt contains the node coordinates
mesh_elements.txt contains the element node connectivity
Your text to link here... [imgur.com]
I want to export it.
Asking some guidance to generate these two files:
mesh_nodes.txt contains the node coordinates
mesh_elements.txt contains the element node connectivity
Edited by davide445 - March 23, 2022 12:56:49
Houdini Indie and Apprentice » Export tet mesh
- davide445
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jsmackIt's really a pity.
I'm not aware of any formats that support exporting tets, other than some scientific simulation formats. OBJ and STL formats can only describe surfaces made of polygons.
I'm doing the same work on specialized mesher that require messing around btw scarse or huge documentation, forum, testing to achieve something in Houdini needed just a couple of nodes and 1 min work.
A waste of potential, considering also Houdini has his FEM solver.
I.e. gmsh it's an open source mesher with his own .msh format that I suppose can be used for an exporter in Houdini.
I just needed the developer support to understand how to get out a tet mesh using his far from clean UX.
Edited by davide445 - Feb. 16, 2022 17:27:21
Houdini Indie and Apprentice » Export tet mesh
- davide445
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Created a tet mesh from an organic shape using Tet Embed and was super easy, I have a problem about how exporting it preserving the created solid geometry. This [e1.pcloud.link] is the original mesh.
Exporting as STL or OBJ is preserving the triangles but loose the information about the solids, so that if I import the STL in a mesher such as Gmsh (need to convert the result as.msh) told me there are 0 tetrahedron.
Exporting as STL or OBJ is preserving the triangles but loose the information about the solids, so that if I import the STL in a mesher such as Gmsh (need to convert the result as.msh) told me there are 0 tetrahedron.
Edited by davide445 - Feb. 16, 2022 05:57:16
Technical Discussion » Volumetric 3D texturing
- davide445
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Yes I know is possible to convert them in volume.
My topic was if will be possible to 3D texture a volume.
My topic was if will be possible to 3D texture a volume.
Technical Discussion » Volumetric 3D texturing
- davide445
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Just to have an example let's say I want to import Ircadb 1.12 [www.ircad.fr] patient DICOM file, transform in solid one of the kidneys and next my goal will be to fill the volume with a 3D texture containing the tissue details such as in this example
https://histologyguide.com/slideview/MH-143-kidney/16-slide-1.html?x=13531&y=24200&z=75.0 [histologyguide.com]
https://histologyguide.com/slideview/MH-143-kidney/16-slide-1.html?x=13531&y=24200&z=75.0 [histologyguide.com]
Technical Discussion » Volumetric 3D texturing
- davide445
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Getting to work with the help of medical illustration professional to create new anatomic models from DICOM volumes.
Sure you can get them in Houdini, but wanted to ask if will be possible once I converted them in solid, if will be possible to add on the solid interior a volumetric 3d texture (i.e. a tissue), instead of just painting a surface.
In this way if I cut them I will be always able to see the right thing, and not an empty shell.
Sure you can get them in Houdini, but wanted to ask if will be possible once I converted them in solid, if will be possible to add on the solid interior a volumetric 3d texture (i.e. a tissue), instead of just painting a surface.
In this way if I cut them I will be always able to see the right thing, and not an empty shell.
Technical Discussion » Building facade from real data
- davide445
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Drasko IvezicSince the area to map is quite large (many paths in 8 cities) Im working to
If you would use a real street data, first of all, you are talking about some sort of 3D scan? Then photogrammetry is your friend. There are free/commercial solutions which Houdini supports to make a geometry out of photos.
But if you think there would be an algorithm to extract that data and magically recreate that modules based on your 360 image, technology is not there yet. We would need to train a lot of ML nodes for that to work, but I am sure there must be a paper somewhere or someone is working on it already and it will become available soon. Until then, the solutions are, hire professional 3D scanning crew and bring them in your neighborhood and then hire few more modelers to clean your geometry in a way that they remodel all the modules and texture them for the game use, for example. And this is probably too much for some indie artist pocket.
Just a note, if you plan to scan your neighborhood you better ask around if you need to acquire some permit from the local government, it is basically the same as you would shoot for the movie. So be aware of possible legal constrains as well.
- if needed scanning searching just for facades pictures extraction. This will possibly be done with simple geolocation systems, but of course need time and assets. Already in contact with local privacy regulators, seems there is no real problem. Avoiding full 3D reconstruction due to needing more manual work
- if possible avoid scanning but just generate facades with the correct style. In this case looking at AI style transfer solution that can look at Street View and extract his local facade style. In this way avoiding going on the road and applicable to potentially any area where street view is available
Edited by davide445 - Dec. 16, 2020 01:41:48
Technical Discussion » Building facade from real data
- davide445
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Looking to use Building Generator, but using real "street view" kind of data as souce.
Defining manually different buildings style is time consuming and also will never replicate all the real buildings on a street.
Using Google Street View data is not allowed for offline usage.
As middle ground I was thinking if it's possible to extract from self-produced recorded 360 videos basic info about the buildings (prevalent color, position of the windows, number of floors) and next use these abstract data to generate the buildings.
Want to ask if someone ever faced this kind of problem.
Defining manually different buildings style is time consuming and also will never replicate all the real buildings on a street.
Using Google Street View data is not allowed for offline usage.
As middle ground I was thinking if it's possible to extract from self-produced recorded 360 videos basic info about the buildings (prevalent color, position of the windows, number of floors) and next use these abstract data to generate the buildings.
Want to ask if someone ever faced this kind of problem.
Houdini Indie and Apprentice » Mapbox cache and data smoothing
- davide445
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Just resuming my Mapbox on Steroids HDA to capture some data.
The download worked just fine but
- if I try to flag the use cache option seems to cook something but nothing is displayed. Using as a test Mask by Feature to calc the min and max height, retuned totally wrong 1.79e+308 and -1.79e-308 so I suppose nothing is loaded
- the data are not smooth, I need to improve the resolution to be used on a realtime system otherwise will be terrased in this way
The download worked just fine but
- if I try to flag the use cache option seems to cook something but nothing is displayed. Using as a test Mask by Feature to calc the min and max height, retuned totally wrong 1.79e+308 and -1.79e-308 so I suppose nothing is loaded
- the data are not smooth, I need to improve the resolution to be used on a realtime system otherwise will be terrased in this way
Technical Discussion » PC RAM and storage upgrade options
- davide445
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goatUsing Houdini with the final goal to replace 3dsmax (Windows only), I was testing it also on my KDE Neon secondary boot.
In all seriousness, Linux has great capabilities when dealing with memory issues -from ssh-ing in to kill processes, to launching tty terminals when the gui stops. It also uses jemalloc for memory management, which is best in class, even if it allows facebook to run
Unfortunately I'm needing to use Mapbox on steroids node (https://gumroad.com/l/IMnXK)
to gather high res terrain data, and is not working correctly on Linux (at least not for me).
So I'm stuck on Windows and didn't know if Linux might be working in this workflow.
Btw I find Houdini great for terrains, but really cumbersome to work with CAD files, so I doubt will be able to replace 3dsmax soon.
Edited by davide445 - Nov. 10, 2019 13:18:02
Technical Discussion » PC RAM and storage upgrade options
- davide445
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Maybe I needed to specify I'm working on Windows. I didn't find an option to allocate a specific number of thread/cores, or there is one.
Technical Discussion » PC RAM and storage upgrade options
- davide445
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Was asking if the PC was freezing, as in my case.
In my case the cpu became stuck at 100%,ram at 100% and next the system freeze attempting to work on VM.
In my case the cpu became stuck at 100%,ram at 100% and next the system freeze attempting to work on VM.
Technical Discussion » PC RAM and storage upgrade options
- davide445
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That's REALLY interesting, really thanks for testing.
Didn't know about your CPU, but your PC freezes both swapping on SATA and NVMe?
Btw I was looking to purchase exactly the 970 Evo Plus NVMe drive.
Didn't know about your CPU, but your PC freezes both swapping on SATA and NVMe?
Btw I was looking to purchase exactly the 970 Evo Plus NVMe drive.
Technical Discussion » PC RAM and storage upgrade options
- davide445
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Thanks for this answer.
If 64GB will be not enough will anyway use VM, using a NVMe drive will make any difference vs a SATA one for paging file?
I can also upgrade to 64GB RAM and purchase a 1TB SATA SSD so to switch there also Houdini (currently installed on the HDD due to lack of space on the OS SSD).
If 64GB will be not enough will anyway use VM, using a NVMe drive will make any difference vs a SATA one for paging file?
I can also upgrade to 64GB RAM and purchase a 1TB SATA SSD so to switch there also Houdini (currently installed on the HDD due to lack of space on the OS SSD).
Edited by davide445 - Nov. 6, 2019 03:41:13
Technical Discussion » PC RAM and storage upgrade options
- davide445
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Yesterday after downloading 16k terrain data from Mapbox I discovered I'm unable to work on them since the node filled my 32GB Ram and started swapping in the virtual memory, blocking the system till I need to reboot it.
Currently using an HDD as virtual memory target due to the other SSD being too full, I was thinking what can be the most effective way to proceed so to being able to work
- upgrade to 64GB Ram, max allowed from my system. Still im not sure will be enough (in another freeze I was looking at 110GB VM allocated) so using again slow VM drive probably will reach the same blocking situation
- without RAM upgrade, upgrade to a 1TB NVMe drive, shared for OS and programs, using it also for VM
- also no more RAM but to 1TB SATA SSD + 256GB NVMe, using the bigger for OS and programs and the smaller for swap, cache and VM.I was reading this article where seems NVMe vs Sata didn't change much, but being my case not simulation with caching not sure is appicable.
https://www.mediaworkstations.net/2019/08/30/houdini-software-system-requirements-and-benchmarks-cache-disk-and-ram-part-ii-of-iii/ [www.mediaworkstations.net]
- upgrade to 64GB Ram and a new 256GB NVMe drive for VM and cache.
- was reading also the possibility to use some PDG node to optimize memory usage, but being I already stuck on the Mapbox node I think this will be only a later stage solution
Someone more expert than me can share his ideas.
Currently using an HDD as virtual memory target due to the other SSD being too full, I was thinking what can be the most effective way to proceed so to being able to work
- upgrade to 64GB Ram, max allowed from my system. Still im not sure will be enough (in another freeze I was looking at 110GB VM allocated) so using again slow VM drive probably will reach the same blocking situation
- without RAM upgrade, upgrade to a 1TB NVMe drive, shared for OS and programs, using it also for VM
- also no more RAM but to 1TB SATA SSD + 256GB NVMe, using the bigger for OS and programs and the smaller for swap, cache and VM.I was reading this article where seems NVMe vs Sata didn't change much, but being my case not simulation with caching not sure is appicable.
https://www.mediaworkstations.net/2019/08/30/houdini-software-system-requirements-and-benchmarks-cache-disk-and-ram-part-ii-of-iii/ [www.mediaworkstations.net]
- upgrade to 64GB Ram and a new 256GB NVMe drive for VM and cache.
- was reading also the possibility to use some PDG node to optimize memory usage, but being I already stuck on the Mapbox node I think this will be only a later stage solution
Someone more expert than me can share his ideas.
Edited by davide445 - Nov. 6, 2019 02:24:03
Houdini for Realtime » Bake grid geometry in texture
- davide445
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Having this steps made as self sustaining gratings.
It's for sure not a problem to recreate the geometry, wondering if it's possible to next bake it in a texture that can be used in a realtime engine.
It's for sure not a problem to recreate the geometry, wondering if it's possible to next bake it in a texture that can be used in a realtime engine.
Edited by davide445 - Oct. 22, 2019 13:38:48
Houdini Indie and Apprentice » Select and highlight + group in tree view
- davide445
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Imported an architectural model with 4500 nodes grouped in different groups
didn't make so sense to show them in node view.
I supposed selecting a node in the viewport will highlight it in tree view, but this didn't happen.
Also I suppose there is a way to select multiple nodes in tree view and next group them, also seems not possible.
I know there is a subnet option, but without being able to multiple select it's not useful. And I can't find what selecting without a feedback in the tree view when I select an object in the viewport.
Asking for advice
didn't make so sense to show them in node view.
I supposed selecting a node in the viewport will highlight it in tree view, but this didn't happen.
Also I suppose there is a way to select multiple nodes in tree view and next group them, also seems not possible.
I know there is a subnet option, but without being able to multiple select it's not useful. And I can't find what selecting without a feedback in the tree view when I select an object in the viewport.
Asking for advice
Edited by davide445 - Oct. 21, 2019 09:44:41
Houdini Lounge » Will Polyexpand2d and some NURBS SOP be compilable in Houdini 18?
- davide445
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zengchen01I've seen this tutorial but seems really complex for a beginner like me.
The road I generate by Polyexpand2d SOP is quite simple.
I think this road tutorial is more useful.Dokai Tutorial [vimeo.com]
Simple roads are fine if also the setup is simple :-).
Can you point me out in the right direction.
Edited by davide445 - Oct. 12, 2019 06:22:13
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