zlacker

Have you worked with Open Cascade recently? As someone who works with it every day for developing a CAD application, it would be interesting to know what people see as its limitations. It's the only geometry kernel I've had access to, and it seems like an absolute gift

>>wizzle+(OP)
Can you share what you do with it? What kind of projects or industry is your application targeting?

>>wizzle+(OP)
cadquery wraps OCC (OpenCascades) but used to wrap freeCAD.

Here's a LEGO interlocking block brick in cadquery: https://cadquery.readthedocs.io/en/latest/examples.html#lego... .

awesome-cadquery: https://github.com/CadQuery/awesome-cadquery

cadquery and thus also jupyter-cadquery now have support for build123d.

gumyr/build123d https://github.com/gumyr/build123d :

> Build123d is a python-based, parametric, boundary representation (BREP) modeling framework for 2D and 3D CAD. It's built on the Open Cascade geometric kernel and allows for the creation of complex models using a simple and intuitive python syntax. Build123d can be used to create models for 3D printing, CNC machining, laser cutting, and other manufacturing processes. Models can be exported to a wide variety of popular CAD tools such as FreeCAD and SolidWorks.

> Build123d could be considered as an evolution of CadQuery where the somewhat restrictive Fluent API (method chaining) is replaced with stateful context managers* - e.g. with blocks - thus enabling the full python toolbox: for loops, references to objects, object sorting and filtering, etc.*

"Build123d: A Python CAD programming library" (2023) >>37576296

build123d docs > Tips & Best Practices: https://build123d.readthedocs.io/en/latest/tips.html

BREP: Boundary representation: https://en.wikipedia.org/wiki/Boundary_representation

Manim, Blender, ipyblender, PhysX, o3de, [FEM, CFD, [thermal, fluidic,] engineering]: https://github.com/ManimCommunity/manim/issues/3362

NURBS: Non-Uniform Rational B-Splines: https://en.wikipedia.org/wiki/Non-uniform_rational_B-spline

NURBS for COMPAS: test_curve.py, test_surface.py: https://github.com/gramaziokohler/compas_nurbs :

> This package is inspired by the NURBS-Python package, however uses a NumPy-based backend for better performance.

> Curve, and Surface are non-uniform non-rational B-Spline geometries (NUBS), RationalCurve, and RationalSurface are non-uniform rational B-Spline Geometries (NURBS). They all built upon the class BSpline. Coordinates have to be in 3D space (x, y, z)

https://github.com/compas-dev

compas_rhino, compas_blender,

- [ ] compas_o3de

Blender docs > Modeling Surfaces; NURBs implementation, limits, challenges: https://docs.blender.org/manual/en/latest/modeling/surfaces/...

/? "NURBS" opencascade https://www.google.com/search?q=%22nurbs%22+%22opencascade%2...

OCCT (OCC) Open Cascade Technology: https://en.wikipedia.org/wiki/Open_Cascade_Technology

OCCT > Standard Transient _ MMtg_TShared > Geom_Geometry > Geom_Curve > Geom_BoundedCurve > Geom_BSplineCurve https://dev.opencascade.org/doc/occt-6.9.1/refman/html/class...

OCC > Standard Transient _ MMtg_TShared > Geom_Geometry > Geom_Surface > Geom_BoundedSurface > Geom_BSplineSurface: https://dev.opencascade.org/doc/occt-6.9.1/refman/html/class...

Cadquery.Shape.toSplines(degree: int = 3, tolerance: float = 0.001, nurbs: bool = False)→ T https://cadquery.readthedocs.io/en/latest/classreference.htm...