OpenCascade/occt
1
0
Fork 0
mirror of https://git.dev.opencascade.org/repos/occt.git synced 2025-04-03 17:56:21 +03:00
Code Packages Releases Activity

0030389: Data Exchange - StlAPI_Writer does not check if the face has triangulation

Browse Source 
When merging triangulation of the faces skip those having no triangulation.
Test case for the issue.
This commit is contained in:
emv 2018-11-29 10:20:23 +03:00 committed by apn
parent 7e19e96ae9
commit 44d5a096a3
2 changed files with 51 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
src/StlAPI/StlAPI_Writer.cxx
View File

@ -15,6 +15,8 @@
#include <Bnd_Box.hxx>
#include <BRepBndLib.hxx>
#include <Message.hxx>
#include <Message_Messenger.hxx>
#include <OSD_Path.hxx>
#include <OSD_OpenFile.hxx>
#include <RWStl.hxx>
@ -56,16 +58,29 @@ Standard_Boolean StlAPI_Writer::Write (const TopoDS_Shape& theShape,
}
}
if (aNbTriangles == 0)
{
// No triangulation on the shape
return Standard_False;
}
// create temporary triangulation
Handle(Poly_Triangulation) aMesh = new Poly_Triangulation (aNbNodes, aNbTriangles, Standard_False);
// count faces missing triangulation
Standard_Integer aNbFacesNoTri = 0;
// fill temporary triangulation
Standard_Integer aNodeOffset = 0;
Standard_Integer aTriangleOffet = 0;
for (TopExp_Explorer anExpSF (theShape, TopAbs_FACE); anExpSF.More(); anExpSF.Next())
{
const TopoDS_Shape& aFace = anExpSF.Current();
TopLoc_Location aLoc;
Handle(Poly_Triangulation) aTriangulation = BRep_Tool::Triangulation (TopoDS::Face (anExpSF.Current()), aLoc);
Handle(Poly_Triangulation) aTriangulation = BRep_Tool::Triangulation (TopoDS::Face (aFace), aLoc);
if (aTriangulation.IsNull())
{
++aNbFacesNoTri;
continue;
}
const TColgp_Array1OfPnt& aNodes = aTriangulation->Nodes();
const Poly_Array1OfTriangle& aTriangles = aTriangulation->Triangles();
@ -109,7 +124,20 @@ Standard_Boolean StlAPI_Writer::Write (const TopoDS_Shape& theShape,
}
OSD_Path aPath (theFileName);
return myASCIIMode
Standard_Boolean isDone = (myASCIIMode
? RWStl::WriteAscii (aMesh, aPath)
: RWStl::WriteBinary (aMesh, aPath);
: RWStl::WriteBinary (aMesh, aPath));
if (isDone && (aNbFacesNoTri > 0))
{
// Print warning with number of faces missing triangulation
TCollection_AsciiString aWarningMsg =
TCollection_AsciiString ("Warning: ") +
TCollection_AsciiString (aNbFacesNoTri) +
TCollection_AsciiString ((aNbFacesNoTri == 1) ? " face has" : " faces have") +
TCollection_AsciiString (" been skipped due to null triangulation");
Message::DefaultMessenger()->Send (aWarningMsg, Message_Warning);
}
return isDone;
}

19
tests/bugs/stlvrml/bug30389 Normal file
View File

@ -0,0 +1,19 @@
puts "========"
puts "0030389: Data Exchange - StlAPI_Writer does not check if the face has triangulation"
puts "========"
puts ""
box b 1 1 1
# mesh only 5 faces of the box
eval compound [lrange [explode b f] 0 4] cf
incmesh cf 0.1
# save box into stl
writestl b $imagedir/${casename}.stl
# read stl
readstl result $imagedir/${casename}.stl -brep
# check that it contains only 10 triangles
checknbshapes result -face 10