Thanks Denis and Jelle The python OCC.Utils package looks really useful... but I still seem to be stuck... - I can't cant drill down to the geometry level
looking at http://2.bp.blogspot.com/_ZnQO9nI8DrY/SYn-gi04zCI/AAAAAAAAAG0/ed5c_GHlW5g/s1600-h/abstract-2.png I want to go from the face down to the surface (i assume there must be some kind of BRep surface down there) the Topo class allows me to go from the face to other topology entities, like wires and edges. But I can't see a way of getting to the actual geometry. (Or am I misunderstanding something...) ps >( however a face from 2 vertices… I dont think that works ) yes - just being lazy with my typing :) :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Patrick On 18 May 2010 14:58, jelle feringa <jelleferi...@gmail.com> wrote: > As a beginner, one of the difficulties I am having is navigating the data. > Bottom up it seems ok - start from points, create geometry, then create > topology > > p1 = gp_Pnt(0,0,0) > p2 = gp_Pnt(0,0,10) > handle_geom_trimmed_curve = GC_MakeSegment(p1, p2).Value() > topods_edge = BRepBuilderAPI_MakeEdge(handle_geom_trimmed_curve).Edge() > topods_wire = BRepBuilderAPI_MakeWire(topods_edge).Wire() > topods_face = BRepBuilderAPI_MakeFace(topods_wire ).Face() > > But going the other way seems to be difficult. For example, if I start with > the face, how do I get the wire, the edges and the curves? I don't see any > methods to do this. I see something to do with TShape - but I am not sure > what that is... > > handle_topods_tshape = topods_face.TShape() > topods_tshape = handle_topods_tshape.GetObject() > > Any suggestions? > > > Sure. > from OCC.Utils.Topology import Topo > > topo = Topo(topods_face) > topo.number_of_edges() > wi = topo.wires_from_face(aFace) > edg = topo.edges_from_wire(wi) > verts = topo.vertices_from_edge(edg) > > also, can I advice you to use: > OCC.Utils.Construct > > there are functions such as make_edge, make_face that let you write: > > face = make_face(make_wire(make_edge(p1,p2))) > > ( however a face from 2 vertices… I dont think that works ) > > Have you seen all the examples on the SVN version Patrick? > Their an essential reference, as is the doxygen documentation found on > opencascade.org. > That's a pretty ok documentation of the API. > > Cheers, > > -jelle > > > > _______________________________________________ > Pythonocc-users mailing list > Pythonocc-users@gna.org > https://mail.gna.org/listinfo/pythonocc-users > >
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