1 // Copyright (C) 2007-2019 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License, or (at your option) any later version.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 #include "DriverSTL_R_SMDS_Mesh.h"
25 #include <Basics_Utils.hxx>
28 #include <NCollection_DataMap.hxx>
29 #include <Standard_NoMoreObject.hxx>
31 #include "SMDS_Mesh.hxx"
32 #include "SMDS_MeshElement.hxx"
33 #include "SMDS_MeshNode.hxx"
34 #include "SMESH_File.hxx"
40 //=======================================================================
43 //=======================================================================
44 inline static Standard_Integer HashCode
45 (const gp_Pnt& point, Standard_Integer Upper)
50 Standard_Integer I[6];
53 point.Coord( U.R[0], U.R[1], U.R[2] );
55 return ::HashCode(U.I[0]/23+U.I[1]/19+U.I[2]/17+U.I[3]/13+U.I[4]/11+U.I[5]/7,Upper);
57 //=======================================================================
60 //=======================================================================
61 inline static Standard_Boolean IsEqual
62 (const gp_Pnt& point1, const gp_Pnt& point2)
64 static Standard_Real tab1[3], tab2[3];
65 point1.Coord(tab1[0],tab1[1],tab1[2]);
66 point2.Coord(tab2[0],tab2[1],tab2[2]);
67 return (memcmp(tab1,tab2,sizeof(tab1)) == 0);
70 typedef NCollection_DataMap<gp_Pnt,SMDS_MeshNode*,Hasher> TDataMapOfPntNodePtr;
72 const int HEADER_SIZE = 84; // 80 chars + int
73 const int SIZEOF_STL_FACET = 50;
74 const int ASCII_LINES_PER_FACET = 7;
75 const int SIZE_OF_FLOAT = 4;
76 // const int STL_MIN_FILE_SIZE = 284;
79 //=======================================================================
80 //function : DriverSTL_R_SMDS_Mesh
82 //=======================================================================
84 DriverSTL_R_SMDS_Mesh::DriverSTL_R_SMDS_Mesh()
86 myIsCreateFaces = true;
87 myIsAscii = Standard_True;
90 //=======================================================================
91 //function : SetIsCreateFaces
93 //=======================================================================
95 void DriverSTL_R_SMDS_Mesh::SetIsCreateFaces( const bool theIsCreate )
96 { myIsCreateFaces = theIsCreate; }
98 //=======================================================================
101 //=======================================================================
103 Driver_Mesh::Status DriverSTL_R_SMDS_Mesh::Perform()
105 Kernel_Utils::Localizer loc;
107 Status aResult = DRS_OK;
109 if ( myFile.empty() ) {
110 fprintf(stderr, ">> ERREOR : invalid file name \n");
114 SMESH_File file( myFile, /*open=*/false );
115 if ( !file.open() ) {
116 fprintf(stderr, ">> ERROR : cannot open file %s \n", myFile.c_str());
117 if ( file.error().empty() )
118 fprintf(stderr, ">> ERROR : %s \n", file.error().c_str());
122 // we skip the header which is in Ascii for both modes
123 const char* data = file;
126 // we check 128 characters to detect if we have a non-ascii char
127 myIsAscii = Standard_True;
128 for (int i = 0; i < 128; ++i, ++data) {
129 if ( !isascii( *data ) && data < file.end() ) {
130 myIsAscii = Standard_False;
136 fprintf(stderr, ">> ERREOR : cannot create mesh \n");
141 aResult = readAscii( file );
143 aResult = readBinary( file );
146 myMesh->CompactMesh();
153 static Standard_Real readFloat(SMESH_File& theFile)
160 const char* c = theFile;
163 u.i |= (c[1] & 0xFF) << 0x08;
164 u.i |= (c[2] & 0xFF) << 0x10;
165 u.i |= (c[3] & 0xFF) << 0x18;
166 theFile += SIZE_OF_FLOAT;
171 static SMDS_MeshNode* addNode(const gp_Pnt& P,
172 TDataMapOfPntNodePtr& uniqnodes,
175 SMDS_MeshNode* node = 0;
176 if ( uniqnodes.IsBound(P) ) {
177 node = uniqnodes.Find(P);
179 node = theMesh->AddNode(P.X(), P.Y(), P.Z() );
180 uniqnodes.Bind(P,node);
186 static SMDS_MeshNode* readNode(FILE* file,
187 TDataMapOfPntNodePtr& uniqnodes,
190 Standard_ShortReal coord[3];
192 fscanf(file,"%*s %f %f %f\n",&coord[0],&coord[1],&coord[2]);
194 gp_Pnt P(coord[0],coord[1],coord[2]);
195 return addNode( P, uniqnodes, theMesh );
198 static SMDS_MeshNode* readNode(SMESH_File& theFile,
199 TDataMapOfPntNodePtr& uniqnodes,
203 coord.SetX( readFloat(theFile));
204 coord.SetY( readFloat(theFile));
205 coord.SetZ( readFloat(theFile));
207 return addNode( coord, uniqnodes, theMesh );
210 //=======================================================================
211 //function : readAscii
213 //=======================================================================
215 Driver_Mesh::Status DriverSTL_R_SMDS_Mesh::readAscii(SMESH_File& theFile) const
217 Status aResult = DRS_OK;
220 if ( strncmp( "solid ", theFile, strlen("solid ")) == 0 ) // not empty
222 const char * header = theFile;
223 std::string& name = const_cast<std::string&>( myName );
224 for ( header += strlen("solid "); !iscntrl( *header ); ++header )
225 name.push_back( *header );
227 std::string::iterator i = name.begin();
228 while ( i != name.end() && isspace( *i )) ++i;
229 name.erase( name.begin(), i );
231 size_t n = name.size();
232 while ( n > 0 && isspace( name[ n - 1 ] )) --n;
237 long filesize = theFile.size();
241 #if defined(WIN32) && defined(UNICODE)
242 std::wstring aFile = Kernel_Utils::utf8_decode_s(myFile);
243 FILE* file = _wfopen( aFile.c_str(), L"r");
245 FILE* file = fopen(myFile.c_str(), "r");
248 // count the number of lines
249 Standard_Integer nbLines = 0;
250 for (long ipos = 0; ipos < filesize; ++ipos)
252 if (getc(file) == '\n')
256 // go back to the beginning of the file
259 Standard_Integer nbTri = (nbLines / ASCII_LINES_PER_FACET);
261 TDataMapOfPntNodePtr uniqnodes;
263 while (getc(file) != '\n');
266 for (Standard_Integer iTri = 0; iTri < nbTri; ++iTri)
268 // skipping the facet normal
269 Standard_ShortReal normal[3];
270 fscanf(file,"%*s %*s %f %f %f\n",&normal[0],&normal[1],&normal[2]);
272 // skip the keywords "outer loop"
273 fscanf(file,"%*s %*s");
276 SMDS_MeshNode* node1 = readNode( file, uniqnodes, myMesh );
277 SMDS_MeshNode* node2 = readNode( file, uniqnodes, myMesh );
278 SMDS_MeshNode* node3 = readNode( file, uniqnodes, myMesh );
281 myMesh->AddFace(node1,node2,node3);
283 // skip the keywords "endloop"
286 // skip the keywords "endfacet"
294 //=======================================================================
295 //function : readBinary
297 //=======================================================================
299 Driver_Mesh::Status DriverSTL_R_SMDS_Mesh::readBinary(SMESH_File& file) const
301 Status aResult = DRS_OK;
303 // the size of the file (minus the header size)
304 // must be a multiple of SIZEOF_STL_FACET
306 long filesize = file.size();
308 if ( (filesize - HEADER_SIZE) % SIZEOF_STL_FACET != 0
309 // Commented to allow reading small files (ex: 1 face)
310 /*|| (filesize < STL_MIN_FILE_SIZE)*/) {
311 Standard_NoMoreObject::Raise("DriverSTL_R_SMDS_MESH::readBinary (wrong file size)");
314 // don't trust the number of triangles which is coded in the file
315 // sometimes it is wrong, and with this technique we don't need to swap endians for integer
316 Standard_Integer nbTri = ((filesize - HEADER_SIZE) / SIZEOF_STL_FACET);
319 if ( strncmp( "name: ", file, strlen("name: ")) == 0 ) // name present
321 const char * header = file;
322 std::string& name = const_cast<std::string&>( myName );
323 header += strlen("name: ");
324 name.assign( header, HEADER_SIZE - strlen("name: ") - 4);
326 size_t n = name.size();
327 while ( n > 0 && isspace( name[ n - 1 ] )) --n;
334 TDataMapOfPntNodePtr uniqnodes;
336 for (Standard_Integer iTri = 0; iTri < nbTri; ++iTri) {
339 file += 3 * SIZE_OF_FLOAT;
342 SMDS_MeshNode* node1 = readNode( file, uniqnodes, myMesh );
343 SMDS_MeshNode* node2 = readNode( file, uniqnodes, myMesh );
344 SMDS_MeshNode* node3 = readNode( file, uniqnodes, myMesh );
347 myMesh->AddFace(node1,node2,node3);