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Geometry Modeling

1. R by ReD_CoDE on 11 Feb 2020, edited 16 Jun 2020 #

   Hi all,

   I opened this topic to discuss about geometry and geometry related topics

   Topics like Solid and Surface modeling, and also hybrid modeling which supports solid and surface paradigms together (common on the PLM industry)

   File formats to choose the best schema that supports geometries well, like JT = STEP AP 242 (ISO 10303-242), like USD, like IFC, ...

   And modeling methods, Top-Down and Bottom-UP

2. M by magicalcloud_75 on 17 Feb 2020 #

   Good subject

   Geometry is KING

   Naming parts is less impromant than the structure provided.

   Conversions KILL stucture

   Therefore the whole oncept of BIM is still veru weak.

3. R by ReD_CoDE on 17 Feb 2020 #

   @magicalcloud_75 Hi Hans, happy see you hear.

   Yes, "Geometry is KING" and hope soon we all start a discussion about all paradigms and each one is good for which use case or use cases?

4. R by ReD_CoDE on 24 Mar 2020 #

   @Moult Dion, I think there's a need to write an article about geometric modeling which would be accurate as well as coherent

   I think these articles are good to start:

   Types of Geometric ModelingGeometric ModelingFaceted Modeling and NURBSThree-Dimensional (3D) CAD Formats

5. R by ReD_CoDE on 30 Mar 2020 #

   I add the question I asked here too:

   Is there any advanced mathematical geometric modeling paradigm like NURBS that is suitable for many environments, manifolds and many purposes like modeling, visualization, emulation, simulation, analysis, etc and transformable to other paradigms and vise versa? 

6. R by ReD_CoDE on 2 Apr 2020 #

   Known workflow: Brep (NURBS) --> Mesh ((sometimes optimized) triangular or quads)

   Mesh --> Brep is an opened issue

7. J by Jesusbill on 2 Apr 2020 #

   In what context do you see useful to go from Mesh to Geometry?

8. R by ReD_CoDE on 2 Apr 2020 # +1 votes

   Good question, I think there are some technologies/methodologies that just are suitable to generate mesh and just produce mesh, like AI/ML/DL related areas like Laser Scanning, like Photogrammetry, etc

9. R by ReD_CoDE on 2 Apr 2020 #

   I think I added one more just here "and just produce mesh" the correct

10. R by ReD_CoDE on 2 Apr 2020 # +1 votes

    @Moult Please open edit, you said you will open it, but it seems that you didn't, also, sometimes it has issues in saving and loading content

    I think I added one more just here "and just produce mesh" the correct is: and produce mesh

11. R by ReD_CoDE on 2 Apr 2020 #

    Also, for instance Blender, which is mainly Polygonal Modeling tool, so for Blender Mesh to Brep is an opened issue if someone thinks about generate for instance stair modeled on Blender directly into Brep (NURBS) or CSG (https://community.osarch.org/discussion/13/building-a-custom-designed-stair-with-blender)

12. R by ReD_CoDE on 2 Apr 2020 #

    I know about implicit modeling ;)

13. J by Jesusbill on 2 Apr 2020 #

    <p><a class="atMention" data-username="Moult" data-userid="2" href="https://community.osarch.org/profile/Moult">@Moult</a> Please open edit, you said you will open it, but it seems that you didn&#039;t, also, sometimes it has issues in saving and loading content</p><p>I think I added one more just here &quot;and just produce mesh&quot; the correct is: and produce mesh</p>Don't worry man, understood ?

14. J by Jesusbill on 2 Apr 2020 #

    For point cloud / laser scanning it makes sense.

    For Blender example if you want to end up in having a geometry I don't see why use polygonal modelling in the first place.

    Just some thoughts

15. J by Jesusbill on 2 Apr 2020 #
16. R by ReD_CoDE on 3 Apr 2020 # +1 votes

    It's hard for me to understand this:

    "For Blender example if you want to end up in having a geometry I don't see why use polygonal modelling in the first place."

    However, I think there're some solutions/techniques to end up geometry/topology obstacles

    I'm working to gather all geometric modeling paradigms and categorize them based on their use cases and purposes, etc to finally come with two vitally important news that proves the way I follow on MaterialPass, ProductPass, and FacilityPass projects, and also "decoupling geometry and semantics"

17. J by Jesusbill on 3 Apr 2020 # +1 votes

    It is also hard for me to understand what I meant :D :D

    Let's forget about it, probably did not make sense

18. J by Jesusbill on 15 Apr 2020 # +1 votes

    @ReD_CoDE I saw this repo today and I thought of this thread. Not sure it is related but it looks like

    https://github.com/pmneila/PyMCubes

19. R by ReD_CoDE on 15 Apr 2020 #

    Thank you @Jesusbill, it's valuable, I know that isosurfaces are really important, especially in simulations

20. R by ReD_CoDE on 18 Apr 2020 # +1 votes

    Implicit Modeling

    Implicit modelling for complex geometry

21. R by ReD_CoDE on 19 Apr 2020 #

    @yorik @Moult 2016, FreeCAD froum: https://forum.freecadweb.org/viewtopic.php?f=10&t=15885

22. R by ReD_CoDE on 25 Apr 2020 # +1 votes

    Hyperfun (SIGGRAPH 1999), (http://hyperfun.org)

    Kokopelli (2012), (https://github.com/mkeeter/kokopelli)

    ImplicitCAD (2012), (http://www.implicitcad.org)

    Antimony (2013), (https://github.com/mkeeter/antimony)

    Animation Nodes (2014), (https://animation-nodes.com)

    Ao (2016), (https://github.com/mkeeter/ao-guile-repl)

    libfive + Studio (2018), (http://libfive.com)

23. R by ReD_CoDE on 26 Apr 2020 #

    mods (https://github.com/fabfoundation/mods)

    Antimony and mods have some similarities with what I follow in IfcXtreme

24. R by ReD_CoDE on 8 May 2020 #

    • Geometric Modeling

    • Non-complete Modeling

    • Complete Modeling

    • Geometry Representation

25. B by bitacovir on 9 May 2020 # +1 votes

    https://graphscad.blogspot.com/ Nodal editor for OpensCAD

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