Ah, that makes sense. I figured that it would be something like that since
the code was not hand-generated.
That's _awesome_ that you're working on a visualization layer!
My code is a bit in flux, i'm kind of changing it around as i can to work
towards the classes that are wrapped. I only get an hour or so a day to
work on this so i keep the code working. That means that it does not call
any of the classes that are not wrapped.
Many of the methods I need next are to:
(a) be able to replace in the script below STL import vs STEP input and
still get a cross-section ( STL*)
(b) use BndLib to get the upper and lower bounds so that I can run the
cutting slice in a loop through the whole part
(c) convert the compound edges I get from the intersection into a wire, so
that I can travers the loops
(d) offset the section edges to make loops inset from the edges that are
toolpaths
(d) fill the resulting section with cross-hatching or something like that
I'm glad to hear you like the feedback! I was afraid I was bothering you.
Keep up the good work! I'd much rather do my coding in python than in C++.
Last night, I got basically the same code working in C++ so I could link in
the OpenCascade libs directly, but its much more and ugly code-- i would not
like to do the rest of the project that way ...
Here is the source:
from OCC import *
import os
import sys
def toInches(val):
return val / 25.4;
def countEdges(shape):
te = TopExp_Explorer();
te.Init(shape,TopAbs_EDGE);
edges = {}
while te.More():
edge = te.Current();
edges[edge.HashCode(111333331)] = edge;
te.Next();
return len(edges);
"""
Dump an edge as a sequcence of points
"""
def dumpEdge(edge):
q = GCPnts_QuasiUniformDeflection();
"""
Print the details of an object from the top down
"""
def dumpTopology(shape,level=0):
brt = BRep_Tool();
s = shape.ShapeType();
ts = TopoDS();
print
print "." * level,shapeTypeString(shape),
if s == TopAbs_VERTEX:
#print type(shape )
#if this is a vertext, print coords
#pnt = shape.TShape().Pnt();
pnt = brt.Pnt(ts.Vertex(shape))
print "(",pnt.X()/25.4," ",pnt.Y()/25.4," ",pnt.Z()/25.4,")",
return;
it = TopoDS_Iterator(shape);
while it.More():
it.Next();
shp = it.Value();
dumpTopology(it.Value(),level + 1 );
def shapeTypeString(shape):
st = shape.ShapeType();
s = "?";
if st == TopAbs_VERTEX:
s = "Vertex";
if st == TopAbs_SOLID:
s = "Solid";
if st == TopAbs_EDGE:
s = "Edge";
if st == TopAbs_FACE:
s = "Face";
if st == TopAbs_SHELL:
s = "Shell";
if st == TopAbs_WIRE:
s = "Wire";
if st == TopAbs_COMPOUND:
s = "Compound."
if st == TopAbs_COMPSOLID:
s = "Compsolid."
return s + ":" + str(shape.HashCode(23232232));
#read step file
stepReader = STEPControl_Reader();
stepReader.ReadFile('Test.STEP')
numItems = stepReader.NbRootsForTransfer();
numTranslated = stepReader.TransferRoots();
print numTranslated," Items Loaded."
shape = stepReader.OneShape();
#print shape;
print "Shape Topology:"
dumpTopology(shape);
print "Part has ",countEdges(shape), " Edges";
#make a cutting plane
p = gp_Pnt ( 1,1,-6 );
csys = gp_Ax3(p,gp().DZ())
#cuttingPlane = gp_Pln(p,gp().DZ());
cuttingPlane = gp_Pln(csys);
BRepTools().Write(shape,'test.out');
print "Made cutting plane."
b = BRepAlgo_Section(shape,cuttingPlane,True);
#b.Build();
intersection = b.Shape();
print "Made the section"
dumpTopology(intersection);
print "Intersection:",intersection.IsNull(),intersection.ShapeType()
print "Intersection has",countEdges(intersection)," edges."
_____
From: Paviot Thomas [mailto:[EMAIL PROTECTED]
Sent: Friday, October 10, 2008 12:25 AM
To: Dave Cowden; minerva-pythonocc@gna.org
Subject: RE : [Minerva-pythonocc] pythonOCC 0.96 and STEP import bug
Hello,
STLReader surely inherits its Read() method from a parent class that is not
wrapped.
BTW, feel free to send me the scripts you use to check pythonocc. Any
contribution is welcome!
Thomas
-------- Message d'origine--------
De: [EMAIL PROTECTED] de la part de Dave Cowden
Date: jeu. 09/10/2008 03:08
À: minerva-pythonocc@gna.org
Objet : Re: [Minerva-pythonocc] pythonOCC 0.96 and STEP import bug
Several issues related to dealing with STL:
* STLReader and StlApi are missing the Read(..) methods
* STLMesh* is missing. ( STLMesh.Merge() would be useful to import multiple
files, StlMesh_Explorer for reading a mesh )
Thanks, Thomas for the continued work! this will be great, python is an
excellent language binding as it supports so many other libraries!
On Wed, Oct 8, 2008 at 8:10 PM, Dave Cowden <[EMAIL PROTECTED]> wrote:
> Greetings, List:
>
> I continue to work on my mission, which is to use pythonOCC to "slice" a
> solid model into layers for use in RepRap, an open source rapid
prototyper.
>
> Thanks, Thomas for version 0.97, I needed BRepBndLib!
>
> In my last post I was looking for TopAbs_SHAPE-- i found them-- they are
> module variables of OCC that that works fantastically!
>
> I have come across a few other modules that have missing pieces. There is
> not much method to the list, other than i'm listing them as i come across
> them.
>
> * BRep_Tool is present, but is missing many methods for some reason--
for
> example it has methods "Pnt" and "Surface", but is missing
> "Curve","CurveOnSurface", etc.
>
> * There are a few classes for tesselation that are present but have
missing
> init methods.
> All of these classes:
>
> - GCPnts_QuasiUniformAbscissa
> - GCPnts_QuasiUniformDeflection
> - GCPnts_TangentialDeflection
> - GCPnts_UniformAbscissa
> - GCPnts_UniformDeflection
>
> seem to be missing the constructors and initialize methods that allow them
> to operate.
>
> * BRepOffset_MakeLoops -- similar to above, class definition is there but
> no methods are bound.
>
> * BRepOffset_Tool -- missing most of the methods
>
> * BRepTools -- Read, (very handy opposite Write), UVBounds methods missing
>
> I'm guessing that these were omitted due to some class/signiture that
could
> not be resolved or something....
>
>
>
>
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