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/*****************************************************************************
* $CAMITK_LICENCE_BEGIN$
*
* CamiTK - Computer Assisted Medical Intervention ToolKit
* (c) 2001-2025 Univ. Grenoble Alpes, CNRS, Grenoble INP - UGA, TIMC, 38000 Grenoble, France
*
* Visit http://camitk.imag.fr for more information
*
* This file is part of CamiTK.
*
* CamiTK is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* CamiTK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with CamiTK. If not, see <http://www.gnu.org/licenses/>.
*
* $CAMITK_LICENCE_END$
****************************************************************************/
#include "OffComponent.h"
#include <sstream>
#include <QFileInfo>
#include <QVector3D>
// disable warning generated by clang about the surrounded headers
#include <CamiTKDisableWarnings>
#include <vtkOBJReader.h>
#include <vtkProperty.h>
#include <CamiTKReEnableWarnings>
#include <vtkUnstructuredGrid.h>
#include <vtkTetra.h>
#include <vtkHexahedron.h>
#include <vtkWedge.h>
#include <vtkPyramid.h>
#include <vtkCellArray.h>
using namespace camitk;
// -------------------- default constructor --------------------
OffComponent::OffComponent(const QString& file) : MeshComponent(file, QFileInfo(file).baseName()) {
vtkPolyData* offMesh = vtkPolyData::New();
vtkPoints* points = vtkPoints::New();
vtkCellArray* polys = vtkCellArray::New();
std::ifstream inputFile(file.toStdString().c_str(), std::ios::in);
std::string line;
// pass the comments and the first line
while (!std::getline(inputFile, line).eof() && line.at(0) == '#' && line.compare("OFF") != 0) {
}
//read the numbers of vertices and of cells
long nbVertex = 0;
long nbPolygon = 0;
vtkIdType countVertex = 0;
double pt[3];
std::getline(inputFile, line);
std::istringstream stream(line, std::istringstream::in);
stream >> nbVertex;
stream >> nbPolygon;
long nbCells = nbPolygon;
long nbPoints = nbVertex;
while (std::getline(inputFile, line) && countVertex < nbPoints) {
std::istringstream stream(line, std::istringstream::in);
if (line.compare("#") != 0) {
for (int i = 0; i < 3; i++) {
stream >> pt[i];
}
points->InsertPoint(countVertex, pt[0], pt[1], pt[2]); // insert point
++countVertex;
}
}
offMesh->SetPoints(points);
//read connectivity
vtkIdType eltType = 0;
vtkIdType pts[3];
int elemCount = 0;
do {
std::istringstream stream(line, std::istringstream::in);
if (line.compare("#") != 0) {
stream >> eltType; // the first character is the number of points of the element
for (int i = 0; i < eltType; i++) {
stream >> pts[i]; // points coordinates
}
polys->InsertNextCell(eltType, pts); // add the element to the vtkCellArray
++elemCount;
}
}
while (std::getline(inputFile, line) && elemCount < nbCells);
offMesh->SetPolys(polys);
// instantiate the Geometry
initRepresentation(offMesh);
// add the represention in the 3D viewer
setVisibility("3D Viewer", true);
}
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