Trying to export STL file in python demos  #912

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1. joergbrech commented on Jul 18, 2022

   

   joergbrech

   on Jul 18, 2022

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   Thanks for opening an issue here! I will move this issue to the discussion board if you don't mind.

   I think this demo could help you along: https://github.com/rainman110/tigl-workshop/blob/master/Exercises/solutions/Exercise1_Basics_Solution.ipynb.

   Basically, you would use pythonocc to create a TopoDS_Face from your Geom_BSplineSurface. Then you can pass this face to a CNamedShape. The latter is a tigl class that can be added to an exporter:

   from tigl3 import curve_factories as cf
   from tigl3 import surface_factories as sf
   from tigl3.exports import create_exporter
   
   from tigl3.geometry import CNamedShape
   from OCC.BRepBuilderAPI import BRepBuilderAPI_MakeFace
   
   # list of points on NACA2412 profile
   px = [1.000084, 0.975825, 0.905287, 0.795069, 0.655665, 0.500588, 0.34468, 0.203313, 0.091996, 0.022051, 0.0, 0.026892, 0.098987, 0.208902, 0.346303, 0.499412, 0.653352, 0.792716, 0.90373, 0.975232, 0.999916]
   py = [0.001257, 0.006231, 0.019752, 0.03826, 0.057302, 0.072381, 0.079198, 0.072947, 0.054325, 0.028152, 0.0, -0.023408, -0.037507, -0.042346, -0.039941, -0.033493, -0.0245, -0.015499, -0.008033, -0.003035, -0.001257]
   
   # lists of coordinates for 2 curves
   points1 = []
   points2 = []
   for x, y in zip(px, py):
       points1.append([x*100, y*100, 0])
       points2.append([x*100, y*100, 500])
   
   curve1 = cf.interpolate_points(points1)
   curve2 = cf.interpolate_points(points2)
   surface = sf.interpolate_curves([curve1, curve2])
   
   face = BRepBuilderAPI_MakeFace(surface, 1e-6).Face()
   named_face = CNamedShape(face, "myface")
   
   stl_exporter = create_exporter("stl")
   stl_exporter.add_shape(named_face)
   stl_exporter.write("test.stl")
2. DLR-SC

   locked and limited conversation to collaborators on Jul 18, 2022
3. joergbrech

   converted this issue into a discussion #913 on Jul 18, 2022