WriteBodyToOccBinaryObject.cpp File Reference

Functions
int	GetTesselationStatus ()
void	WriteBody (Dtk_NodePtr inNode)
void	WriteDtk_Mesh (const Dtk_MeshPtr &inMeshToWrite)

Variables
Dtk_transfo	CurrentMatrix

Function Documentation

GetTesselationStatus()

int GetTesselationStatus

(

)

{
     return TessStatus;
}

WriteBody()

void WriteBody

(

Dtk_NodePtr

inNode

)

{
    // Get if the node represent infinite geometry
    // 1 = Infinite, 0 = Finite
    int NodeInfiniteGeometry = inNode->GetInfos()->GetInfiniteGeometryFlag();
    if (NodeInfiniteGeometry == 0)
    {
        //Calling both methods GetDtk_MeshPtr() and GetDtk_BodyPtr() on BodyNode will give you the same result
        //Choose the one you need in order to avoid duplicated data
        const Dtk_BodyPtr TmpBody = inNode->GetDtk_BodyPtr();
        if (TmpBody.IsNotNULL())
        {
            // Used to write an XML File 
            if (IsXmlDumpActivated())
            {
                XmlWriteBody(TmpBody);
            }
 
            //  TEST  OCC
            //  For each body , write a BREP file (OCC format)
            DKOC_Body2OCCBRep B2OC;
            TopoDS_Shape res;
            B2OC.SetConfigShapeFix(DTK_TRUE);
            B2OC.SetConfigKeepPcurves(DTK_TRUE);
            Dtk_ErrorStatus stat = B2OC.ConvertBody(TmpBody);
            res = B2OC.GetMainShape();
            if (res.IsNull()) 
            {
                std::cout << "WriteBodyOcc Error : " << dtkTypeError(stat).c_str() << std::endl;
                return;
            }
 
            // Name of BREP file : with a number
            static int numbrep = 0;
            numbrep++;
 
            Dtk_InfoPtr bodyinfo = TmpBody->get_info();
            Dtk_string bodyname;
            if (bodyinfo.IsNotNULL()) bodyname = bodyinfo->GetName();
            if (bodyname.len() == 0) 
            {
                bodyinfo = inNode->GetInfos();
                if (bodyinfo.IsNotNULL()) bodyname = bodyinfo->GetName();
                if (bodyname.len() == 0) bodyname = "???";
            }
 
            std::cout << "Writing ToOpenCascade Body " << numbrep << " name: " << bodyname.c_str() << std::endl;
 
            Dtk_string filebrep = bodyname;
            filebrep += "_";
            filebrep.add_int(numbrep);
            filebrep += ".brep";
 
            // Write the brep file
            BRepTools::Write(res, filebrep.c_str());
 
            // How to get a TopoDS_Shape corresponding to a Dtk_Entity from its ID ( get_info()->GetId() )
            // Useful to resolve Dtk_Connector
            // This code gets the ID of the first face and then getting the corresponding TopoDS_Shape
            Dtk_LumpPtr Lump;
            Dtk_VolumePtr Vol;
            Dtk_ShellPtr Shell;
            Dtk_FacePtr Face;
            Dtk_bool orient;
            TopoDS_Shape facewithid;
            TmpBody->GetLump(0, Lump);
            if (Lump.IsNotNULL())
            {
                Lump->GetVolume(0, Vol);
                if (Vol.IsNotNULL())
                {
                    Vol->GetShell(0, Shell);
                    if (Shell.IsNotNULL())
                    {
                        Shell->GetFace(0, Face, orient);
                        if (Face.IsNotNULL())
                        {
                            Dtk_ID faceid = Face->get_info()->GetId();
                            Dtk_string SampleBrepFileForFace = "facewithid";
                            SampleBrepFileForFace.add_int(faceid);
                            SampleBrepFileForFace += ".brep";
                            facewithid = B2OC.ShapeFromDtkID(faceid);
                            BRepTools::Write(facewithid, SampleBrepFileForFace.c_str());
                        }
                    }
                }
            }
 
            // How to get the Dtk_Entity corresponding to a TopoDS_Shape
            // This code show how to retrieve Dtk_Entity form a TopoDS_Shape
            if (!facewithid.IsNull())
            {
                Dtk_ID DatakitFaceID = B2OC.GetDtkID(B2OC.GetShapeID(facewithid));
                Dtk_EntityPtr CorrespondingFace = TmpBody->GetEntity(DatakitFaceID);
            }
 
            //  END OCC conversion
        }
 
        // Some CAD formats store also faceted data besides B-Rep. 
        // So you can get faceted data corresponding to the body using the following method
        const Dtk_MeshPtr TmpFacetedBody = inNode->GetDtk_MeshPtr();
        if (TmpFacetedBody.IsNotNULL())
        {
            TmpFacetedBody->Transform(CurrentMatrix);
            WriteDtk_Mesh(TmpFacetedBody);
        }
 
 
        // If there is no mesh data associated to the current body, you can tessellate (and if init of tessellation engine is successful)
        if (TmpFacetedBody.IsNULL() && TmpBody.IsNotNULL() && GetTesselationStatus() == dtkNoError)
        {
            Dtk_tab<Dtk_MeshPtr> meshes;
            Dtk_tab<Dtk_Int32> isclosed;
            int err_tess = tess_BodyToMeshes(TmpBody, meshes, isclosed);
               if( inNode->Name().len() > 0 )
                    std::cout << "NodeName = " << inNode->Name().c_str() << ";";
            std::cout << "err_tess = " << dtkTypeError( err_tess ).c_str() << std::endl ;
            if (err_tess == 0)
            {
                Dtk_Size_t i, nbmeshes = meshes.size();
                for (i = 0; i < nbmeshes; i++)
                {
                    meshes[i]->Transform(CurrentMatrix);
                    WriteDtk_Mesh(meshes[i]);
                }
            }
 
            if (IsPdfDumpActivated() && TmpBody->HasWire())
            {// handling wire / points
                    PdfWriteEntity( Dtk_EntityPtr::DtkDynamicCast( TmpBody ));
            }
        }
    }
}

WriteDtk_Mesh()

void WriteDtk_Mesh

(

const Dtk_MeshPtr &

inMeshToWrite

)

{
    // convert triangles-strip, fans, polygons into simple triangles
    inMeshToWrite->explode();
 
    // Used to write a PDF File 
    if (IsPdfDumpActivated())
    {
           PdfWriteEntity(Dtk_EntityPtr::DtkDynamicCast(inMeshToWrite));
    }
 
     // Used to write an XML File 
     if (IsXmlDumpActivated())
     {
          XmlWriteMesh(inMeshToWrite);
     }
 
    Dtk_RGB rgb = inMeshToWrite->get_mesh_color();   // mesh global color.
 
    // vertices :
    Dtk_Size_t nbvertices = inMeshToWrite->get_nb_vertices();
    Dtk_Size_t i, j;
    for (i = 0; i < nbvertices; i++)
    {
        Dtk_pnt pnt;
        Dtk_dir dir;
        Dtk_RGB color;
        float u, v;
        u = v = 0.0;
        inMeshToWrite->get_vertex(i, &pnt);  //  coordinates of the vertices
        if (inMeshToWrite->has_normals())
            inMeshToWrite->get_normal(i, &dir);  // vertex normal (if enabled)
        if (inMeshToWrite->has_colors())
            inMeshToWrite->get_color(i, &color);  // vertex color (if enabled)
        if (inMeshToWrite->has_texcoords())
        {
            u = inMeshToWrite->GetUTexture(i);  // vertex u,v texture coordinate (if enabled)
            v = inMeshToWrite->GetVTexture(i);
        }
    }
    // mesh_faces
    Dtk_Size_t k, m, nbmeshfaces = inMeshToWrite->get_nb_mesh_face();
    for (i = 0; i < nbmeshfaces; i++)
    {
        Dtk_mesh_face* mf = inMeshToWrite->get_mesh_face(i);
        Dtk_Size_t nbtriangles = mf->get_nbtriangles();
        Dtk_Int32 trianglesindices[3];
        for (j = 0; j < nbtriangles; j++)
        {
            const Dtk_UInt32* tri = mf->get_triangle_indices(j);
            trianglesindices[0] = tri[0];
            trianglesindices[1] = tri[1];
            trianglesindices[2] = tri[2];
            // id of vertex in vertices table you read in the first step of this function
        }
 
        //face boundaries
        Dtk_Size_t nbpolyline = mf->get_nbpolylines();
        for (j = 0; j < nbpolyline; j++)
        {
            const Dtk_tab<Dtk_UInt32> *pnt;
            pnt = mf->get_polyline_indices(j);
            Dtk_Size_t nbvertex = pnt->size();
            for (k = 0; k < nbvertex; k++)
            {
                m = (*pnt)[k];  // id of vertex in vertices table
                Dtk_pnt pt = inMeshToWrite->get_vertex(m);
            }
        }
    }
}

Variable Documentation

CurrentMatrix

Dtk_transfo CurrentMatrix

extern