Hi, Christian:
The first question is ( ironically ) easiest. Here's an example:
def readSTLShape(fileName):
ts = TopoDS.TopoDS();
logging.info("Reading STL:'" + fileName + "'...");
#read stl file
shape = TopoDS.TopoDS_Shape()
stl_reader = StlAPI.StlAPI_Reader()
stl_reader.Read(shape,fileName)
logging.info("Fixing holes and degenerated Meshes...");
sf = ShapeFix.ShapeFix_Shape(shape);
sf.Perform();
fixedShape = sf.Shape();
logging.info("Making Solid from the Shell...");
#bb = BRepBuilderAPI.BRepBuilderAPI_MakeSolid(ts.Shell(fixedShape));
#bb.Build();
bb = ShapeFix.ShapeFix_Solid();
return bb.SolidFromShell(ts.Shell(fixedShape));
logging.info("Done.");
return bb.Solid();
This code includes reading the stl file as well as fixing problems with it
using Shapefix. It works well for me.
Now, on the second part, I'm not sure I understand completely. I think what
you would want to do is something like this:
(1) create a line ( gp_Lin ) going in the z direction at the coordinate you
specify.
Then, find the intersections with the surfaces of all the solids. I think
there are some tools that are designed to help find intersections.
gp_Lin ( a line : in the gp package )
Check out IntCurvesFace.IntCurvesFace_ShapeIntersector or similar, it has
some tools that might help.
Pythonocc is definitely up to the task though-- I don't think you'll find a
more capable product for the price ;)
One other helpful tip, dealing with the API: I use the following approach:
(1) go to www.opencascade.org, and search the forum. If you can find a clue
there for what you want to do, then you can convert those samples fairly
quickly to the pythonOCC docs for more details. Also, make sure to check
out the svn trunk of pythonOCC so you can see the tools and samples-- there
is a lot of good code there.
I hope this helps!
Dave
-----Original Message-----
From: pythonocc-users-boun...@gna.org
[mailto:pythonocc-users-boun...@gna.org] On Behalf Of Christian Siefkes
Sent: Tuesday, February 16, 2010 1:49 PM
To: PythonOCC users
Subject: [Pythonocc-users] Newbie question: getting coordinates of objects
Hi all,
I'm new to PythonOCC and I bit overwhelmed by the API. What I would like to
do is this:
(1) Read a STL file.
(2) Determine for a specific x,y coordinate where on the z axis are object
borders for that specific coordinate (which points on the z axis are
"inside" and which are "outside" objects for that coordinate).
Samples for (2):
>>> checkCoordinate(1,2)
[(500,1000),(1250,1600)]
# there are two objects at the specified coordinate, one extending from #
z=500 to =z1000, the other from z=1250 to z=1600
>>> checkCoordinate(500,-25)
[]
# No objects at this coordinate
Can anybody give me some hints whether PythonOCC is the right tool for the
job (I would presume so) and what I have to do?
Thanks
Christian
--
|------- Dr. Christian Siefkes ------- christ...@siefkes.net -------
| Homepage: http://www.siefkes.net/ | Blog: http://www.keimform.de/
| Peer Production Everywhere: http://peerconomy.org/wiki/
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being able to make decisions that affect others more than you. If we confuse
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