VERC: .MAP to .DXF Conversion Last edited 2 years ago2022-09-25 03:31:17 UTC

struct DXFEXPINFO
{
    structint nObject;
    BOOL bVisOnly;
    CMapWorld *pWorld;
    FILE *fp;
};

void CMapDoc::OnFileExporttodxf(void)
{
    static CString str;

    if (str.IsEmpty())
    {
        int nDot;

        // Replace the extension with DXF.
        str = GetPathName();
        if ((nDot = str.ReverseFind('.')) != -1)
        {
            str = str.Left(nDot);
        }
        str += ".dxf";
    }

    CExportDlg dlg(str, "dxf", "DXF files (*.dxf)|*.dxf||");
    if(dlg.DoModal() == IDCANCEL)
        return;

    str = dlg.GetPathName();
    if(str.ReverseFind('.') == -1)
        str += ".dxf";

    FILE *fp = fopen(str, "wb");

    pWorld->CalcBounds(TRUE);
    BoundBox box;
    box.UpdateBounds(pWorld);

    fprintf(fp,"9\n$ACADVER\n1\nAC1008\n");
    fprintf(fp,"9\n$UCSORG\n10\n0.0\n20\n0.0\n30\n0.0\n");
    fprintf(fp,"9\n$UCSXDIR\n10\n1.0\n20\n0.0\n30\n0.0\n");
    fprintf(fp,"9\n$TILEMODE\n70\n1\n");
    fprintf(fp,"9\n$UCSYDIR\n10\n0.0\n20\n1.0\n30\n0.0\n");
    fprintf(fp,"9\n$EXTMIN\n10\n%f\n20\n%f\n30\n%f\n",
        box.bmins[0], box.bmins[1], box.bmins[2]);
    fprintf(fp,"9\n$EXTMAX\n10\n%f\n20\n%f\n30\n%f\n",
        box.bmaxs[0], box.bmaxs[1], box.bmaxs[2]);
    fprintf(fp,"0\nENDSEC\n");

    /* Tables section */
    fprintf(fp,"0\nSECTION\n2\nTABLES\n");
    /* Continuous line type */
    fprintf(fp,"0\nTABLE\n2\nLTYPE\n70\n1\n0\nLTYPE\n2\nCONTINUOUS"
        "\n70\n64\n3\nSolid line\n72\n65\n73\n0\n40\n0.0\n");
    fprintf(fp,"0\nENDTAB\n");

    /* Object names for layers */
    fprintf(fp,"0\nTABLE\n2\nLAYER\n70\n%d\n",1);
    fprintf(fp,"0\nLAYER\n2\n0\n70\n0\n62\n7\n6\nCONTINUOUS\n");
    fprintf(fp,"0\nENDTAB\n");
    fprintf(fp,"0\nTABLE\n2\nSTYLE\n70\n1\n0\nSTYLE\n2\nSTANDARD\n70\n0\n"
        "40\n0.0\n41\n1.0\n50\n0.0\n71\n0\n42\n0.2\n3\ntxt\n4\n\n0\n"
        "ENDTAB\n");

    /* Default View? */

    /* UCS */
    fprintf(fp,"0\nTABLE\n2\nUCS\n70\n0\n0\nENDTAB\n");
    fprintf(fp,"0\nENDSEC\n");

    /* Entities section */
    fprintf(fp,"0\nSECTION\n2\nENTITIES\n");

    // export solids
    BeginWaitCursor();

    DXFEXPINFO info;
    info.bVisOnly = dlg.bVisibles;
    info.nObject = 0;
    info.pWorld = pWorld;
    info.fp = fp;

    // Enumerate all the solids in the world, calling the callback.
    pWorld->EnumChildren(ENUMMAPCHILDRENPROC(SaveDXF),
        DWORD(&info;), MAPCLASS_TYPE(CMapSolid));

    EndWaitCursor();

    fprintf(fp,"0\nENDSEC\n0\nEOF\n");
    fclose(fp);
}


static BOOL SaveDXF(CMapSolid *pSolid, DXFEXPINFO *pInfo)
{
    if(pInfo->bVisOnly)
    {
        if(!pSolid->IsVisible(pInfo->pWorld, pInfo->pWorld->dwFilterFlags))
            return TRUE;
    }

    CSSolid *pStrucSolid = new CSSolid;
    pStrucSolid->Attach(pSolid);
    pStrucSolid->Convert();
    pStrucSolid->SerializeDXF(pInfo->fp, pInfo->nObject++);
    delete pStrucSolid;

    return TRUE;
}


void CSSolid::SerializeDXF(FILE *stream, int nObject)
{
    char szName[128];
    sprintf(szName, "OBJECT%03d", nObject);

    // count number of triangulated faces
    int nTriFaces = 0;
    for(int i = 0; i < m_nFaces; i++)
    {
        CSSFace &face; = m_Faces[i];
        nTriFaces += face.nEdges-2;
    }

    fprintf(stream,"0\nPOLYLINE\n8\n%s\n66\n1\n70\n64\n71\n%u\n72\n%u\n",
                            szName, m_nVertices, nTriFaces);

    fprintf(stream,"62\n50\n");

    for(i = 0; i < m_nVertices; i++)
    {
        float *pos = m_Vertices[i].pos;
        fprintf(stream,    "0\nVERTEX\n8\n%s\n10\n%.6f\n20\n%.6f\n30\n%.6f\n70\n192\n",
                szName, pos[0], pos[1], pos[2]);
    }

    // triangulate each face and write
    for(i = 0; i < m_nFaces; i++)
    {
        CSSFace &face; = m_Faces[i];
        PINT pVerts = CreatePointIndexList(face);

        for(int v = 0; v < face.nEdges; v++)
            pVerts[v]++;

        for(v = 0; v < face.nEdges-2; v++)
        {
            fprintf(stream, "0\nVERTEX\n8\n%s\n10\n0\n20\n0\n30\n"
                "0\n70\n128\n71\n%d\n72\n%d\n73\n%d\n", szName,
                v == 0 ? pVerts[0] : -pVerts[0],
                pVerts[v+1],
                v == (face.nEdges-3) ? pVerts[v+2] : -pVerts[v+2]
                );
        }
    }

    fprintf(stream, "0\nSEQEND\n8\n%s\n", szName);
}

User Questions

// triangulate each face and write
for(i = 0; i < m_nFaces; i++)
{
    CSSFace &face; = m_Faces[i];
    PINT pVerts = CreatePointIndexList(face);

    for(int v = 0; v < face.nEdges; v++)
        pVerts[v]++;

    for(v = 0; v < face.nEdges-2; v++)
    {
        fprintf(stream, "0\nVERTEX\n8\n%s\n10\n0\n20\n0\n30\n"
            "0\n70\n128\n71\n%d\n72\n%d\n73\n%d\n", szName,
            v == 0 ? pVerts[0] : -pVerts[0],
            pVerts[v+1],
            v == (face.nEdges-3) ? pVerts[v+2] : -pVerts[v+2]
            );
    }
}

//
// Create point list, but return indices instead of vertices.
//
PINT CSSolid::CreatePointIndexList(CSSFace &face;, PINT piPoints)
{
    PINT pts;
    int nPts = 0;

    if (piPoints)
        pts = piPoints;
    else
        pts = new int[face.nEdges];

    SSHANDLEINFO hi;

    for (int i = 0; i < face.nEdges; i++)
    {
        // calc next edge so we can see which is the next clockwise
        point
            int iNextEdge = i+1;
        if (iNextEdge == face.nEdges)
            iNextEdge = 0;

        CSSEdge *edgeCur = (CSSEdge*) GetHandleData(face.Edges[i]);
        CSSEdge *edgeNext = (CSSEdge*)
            GetHandleData(face.Edges[iNextEdge]);

        SSHANDLE hVertex = GetConnectionVertex(edgeCur, edgeNext);
        ASSERT(hVertex);

        GetHandleInfo(&hi;, hVertex);
        pts[i] = hi.iIndex;
    }

    return pts;
}