Hi, For your information, I tried hard to get Mark's contribution working fine but I failed because of the many dependencies on which this smesh version relies. I didn't manage to cut off the dependency upon VTK, and I gave up: I don't want the small smesh addition to pythonocc require 2 or 3 additional dependencies.
Regards, Thomas 2013/4/9 Mark Blome <bl...@zib.de> > > Hi Cavendish, > > the updates to the geom and smesh modules including integration of the > netgen > mesher are not yet integrated in the official pythonocc distribution. > > I created these updates based on the Salome sources for the FE preprocessor > application I am developing (btw: very interesting to hear you are working > on a similar > project! What is the application area you are focusing on ? Are you > planning a GUI-based > Fe preprocessor? If so which application design are thinking of ? ) > > The updated smesh, geom sources (including wrappers) are available in the > pythonocc > git repository in the branch "mb/geom_smesh_updates": > https://github.com/tpaviot/pythonocc/tree/mb/geom_smesh_updates > > It is planned to merge these updates into the main PythonOCC branch and > thereby make > the latest smesh and geom developments from the Salome project available > to pythonocc > (including the netgen mesher). Unfortunately due to time constraints > (there are always too > many things to do ...) this hasn't happen yet. > > You might consider to work with the files in the mb/geom_smesh_updates > branch (I could assist you > in setting it up so you can work on your project). Once > "mb/geom_smesh_updates" is merged with the > main branch you can then switch back to the official pythonocc distro for > your developments. > > Please also note that the module MT ("MeshTools") is my adaption of the > python smesh interface > available in Salome (which will also be integrated into the official > pythonocc distribution). > > Regards, > Mark > > > > Am 09.04.2013 um 03:08 schrieb Cavendish McKay: > > > Hello, > > > > I'm trying to build a preprocessor for a FE calculation, and I'm running > > into a bit of trouble with the mesh generation. Using the smesh module > > in Salome, I could do something like this: > > > > tetra = smesh.Mesh(part, "Sqmesh") > > algo1D = tetra.Segment() > > algo1D.LocalLength(2.0) > > algo2D = tetra.Triangle() > > algo2D.MaxElementArea(5.0) > > algo3d = tetra.Tetrahedron() > > algo3D.MaxElementVolume(25.0) > > ret = tetra.Compute() > > > > From the writeup at > > http://www.pythonocc.org/resources/meshing/pythonocc-and-smesh/, it > > looks like I ought to be able to do essentially the same thing in > > pythonocc, but there seems to be a disconnect between the way the code > > in the writeup access the mesh generator and its algorithms (i.e., > > meshgen = MT.MeshGen(), etc.) and the module hierarchy present in my > > version (0.6-alpha) of pythonocc. In particular, I can't find a module > > called MT, and the SMESH module doesn't have all the same parts. > > > > By looking at the code in the examples directory, I've made a function > > to generate a surface mesh for a compound object: > > > > def mesh_compound(comp): > > meshgen = SMESH_Gen() > > themesh = meshgen.CreateMesh(0,True) > > an1DHypothesis = StdMeshers_Arithmetic1D(0,0,meshgen) > > an1DHypothesis.SetLength(0.01, False) > > an1DHypothesis.SetLength(1., True) > > an1dAlgo = StdMeshers_Regular_1D(1,0,meshgen) > > > > a2dHypothesis = StdMeshers_QuadranglePreference(2,0,meshgen) > > a2dAlgo = StdMeshers_Quadrangle_2D(3,0,meshgen) > > > > themesh.ShapeToMesh(comp) > > # assign hypotheses > > themesh.AddHypothesis(comp,0) > > themesh.AddHypothesis(comp,1) > > themesh.AddHypothesis(comp,2) > > themesh.AddHypothesis(comp,3) > > #compute > > meshgen.Compute(themesh, themesh.GetShapeToMesh()) > > return themesh > > > > My questions are these: > > 1. Where is the Netgen mesher located? I can't find it in > > OCC.StdMeshers or OCC.SMESH (or anywhere else I've looked, for that > matter). > > 2. There doesn't seem to be a StdMeshers_Triangle_2D. Is that correct? > > 3. Am I missing something? I'd prefer to be able to use the > > Salome-style syntax, as it is clearer to me, but I can't figure out how > > to do so. > > > > Again, I'm using OCE version 0.12, pythonocc version 0.6dev, python > > 2.7.2 on os X 10.8 > > > > Thanks, > > Cavendish > > > > _______________________________________________ > > Pythonocc-users mailing list > > Pythonocc-users@gna.org > > https://mail.gna.org/listinfo/pythonocc-users > > > _______________________________________________ > Pythonocc-users mailing list > Pythonocc-users@gna.org > https://mail.gna.org/listinfo/pythonocc-users >
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