Importing STL files...

Hi,

at the moment I'm trying to import STL files via RWStl::ReadFile().

But I've got some problems (see my code fragment below).

1) if I import ASCII files I get 0 for NbTriangles() and NbVertices()

2) my program always crashes when building some edges

Any help or hints would be nice....

Regards, Patrik Müller

OSD_Path aFile(aFileName);

Handle(StlMesh_Mesh) aSTLMesh = RWStl::ReadFile(aFile);

int NumberDomains = aSTLMesh->NbDomains();

int NumberTriangles = aSTLMesh->NbTriangles();

int NumberVertices = aSTLMesh->NbVertices();

int iND,iNT;

TColgp_SequenceOfXYZ aSeqOfXYZ;

StlMesh_SequenceOfMeshTriangle aSeqOfTriangle;

Standard_Integer v1,v2,v3;

gp_Pnt p1, p2, p3;

TopoDS_Edge e1, e2, e3;

TopoDS_Vertex Vertex1, Vertex2, Vertex3;

TopoDS_Shell AktShell;

TopoDS_Face AktFace;

TopoDS_Wire AktWire;

BRep_Builder B;

B.MakeShell(AktShell);

for (iND = 1; iND

{

aSeqOfTriangle.Assign(aSTLMesh->Triangles(iND));

aSeqOfXYZ.Assign(aSTLMesh->Vertices(iND));

for (iNT = 1; iNT NbTriangles(iND); iNT++)

{

const Handle(StlMesh_MeshTriangle) aTrian = aSeqOfTriangle.Value(iNT);

aTrian->GetVertex(v1,v2,v3);

p1.SetXYZ(aSeqOfXYZ.Value(v1));

p2.SetXYZ(aSeqOfXYZ.Value(v2));

p3.SetXYZ(aSeqOfXYZ.Value(v3));

Vertex1 = BRepBuilderAPI_MakeVertex(p1);

Vertex2 = BRepBuilderAPI_MakeVertex(p2);

Vertex3 = BRepBuilderAPI_MakeVertex(p3);

e1 = BRepBuilderAPI_MakeEdge(Vertex1,Vertex2);

e2 = BRepBuilderAPI_MakeEdge(Vertex2,Vertex3);

e3 = BRepBuilderAPI_MakeEdge(Vertex1,Vertex3);

AktWire = BRepBuilderAPI_MakeWire( e1, e2, e3);

AktFace = BRepBuilderAPI_MakeFace( AktWire);

B.Add(AktShell,AktFace);

}

}

aShape = BRepBuilderAPI_MakeSolid(AktShell);

return aShape;