NURBS Editing Support in BRL-CAD

[drossberg]

Outline

Implement the prerequisites for NURBS editing in BRL-CAD's GUIs

Details

BRL-CAD has support for raytracing of NURBS surfaces implemented, but they are handed over as BLOBs to the openNURBS library. Beyond basic operations such as rotation and translation, the BRL-CAD core has no ability to edit them. This project would implement support for editing NURBS curves and surfaces in the BRL-CAD core, thus creating the prerequisites to handle them with higher level (i.e. GUI) tools.

See this task's description in former GSoCs for some more information: https://brlcad.org/wiki/NURBS_Editing_Support

The key-feature would be to have ged command(s) that lets you build NURBS objects from scratch. This could be done by having a declarative ASCII description of these entities and/or wrapping the openNURBS library by a scripting language.

Describe in your proposal which approach you want to use and why. You may let inspire you by solutions in other programs:

• NURBS-Python: https://github.com/orbingol/NURBS-Python
• Blender: https://blender.stackexchange.com/questions/7020/create-nurbs-surface-with-python
• Web3D: https://www.web3d.org/x3d/content/examples/Basic/NURBS/
• 3DSMax/Maya: https://help.autodesk.com/view/3DSMAX/2016/ENU/?guid=__files_GUID_75CD4DE9_8024_4E25_B147_0A0EC8B10031_htm
• Ayam: http://ayam.sourceforge.net/docsdraft/ayam-6.html

Expected Outcome

Implementing the necessary logic for NURBS handling in librt, libbrep, and libged

Future Possibilities

Implementing a visual NURBS editor in a BRL-CAD GUI (mged, Archer, Arbalest)

Project Properties

Skills

• C/C++

Difficulty

medium

Size

long (350h)

Additional Information

• Potential mentor(s): Daniel Rossberg, Sean Morrison
• Organization website: https://brlcad.org
• Communication channels: https://brlcad.zulipchat.com

[ayushgupta9906]

I want to work on this issue. Please Assign this to me. Thanks