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/*
#
# File : vtk.h
# ( C++ header file - CImg plug-in )
#
# Description : CImg plugin that implements a way to save 3d scene as TK legacy file format.
# This file is a part of the CImg Library project.
# ( http://cimg.eu )
#
# Copyright : Haz-Edine Assemlal
# ( http://www.cim.mcgill.ca/~assemlal/ )
#
# License : CeCILL v2.0
# ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
#
# This software is governed by the CeCILL license under French law and
# abiding by the rules of distribution of free software. You can use,
# modify and/ or redistribute the software under the terms of the CeCILL
# license as circulated by CEA, CNRS and INRIA at the following URL
# "http://www.cecill.info".
#
# As a counterpart to the access to the source code and rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty and the software's author, the holder of the
# economic rights, and the successive licensors have only limited
# liability.
#
# In this respect, the user's attention is drawn to the risks associated
# with loading, using, modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
# that may mean that it is complicated to manipulate, and that also
# therefore means that it is reserved for developers and experienced
# professionals having in-depth computer knowledge. Users are therefore
# encouraged to load and test the software's suitability as regards their
# requirements in conditions enabling the security of their systems and/or
# data to be ensured and, more generally, to use and operate it in the
# same conditions as regards security.
#
# The fact that you are presently reading this means that you have had
# knowledge of the CeCILL license and that you accept its terms.
#
*/
#ifndef cimg_plugin_vtk
#define cimg_plugin_vtk
// Save 3D scene in legacy VTK format
/* *this: CImgList of points
* faces: CImgList of faces
* colors: CImgList of colors,
* opacities: CImgList of opacities
*/
template<typename tf, typename tc, typename to>
CImgList<T>& save_vtk(const char* const filename,
const CImgList<tf>& faces,
const CImgList<tc>& colors,
const CImgList<to<& opacities) {
// Open file
std::FILE *const nfile = cimg::fopen(filename,"w");
// Header
std::fprintf(nfile,"# vtk DataFile Version 3.0\n");
std::fprintf(nfile,"%s\n",filename);
std::fprintf(nfile,"ASCII\n");
std::fprintf(nfile,"DATASET UNSTRUCTURED_GRID\n");
// Points
std::fprintf(nfile,"POINTS %u float\n",points.size());
cimglist_for(points,p)
std::fprintf(nfile,"%f %f %f\n",points[p](0),points[p](1),points[p](2));
std::fprintf(nfile,"\n");
// Faces (valid only for triangles - type 5)
if (faces) {
std::fprintf(nfile,"CELLS %u %u\n",faces.size(),faces.size()*4);
cimglist_for(faces,f)
std::fprintf(nfile,"%d %u %u %u\n",3,faces[f](0),faces[f](1),faces[f](2));
std::fprintf(nfile,"CELL_TYPES %u\n",faces.size());
cimglist_for(faces,f)
std::fprintf(nfile,"%d\n",5);
std::fprintf(nfile,"\n");
}
// Colors and Opacities
std::fprintf(nfile,"CELL_DATA %d\n",colors.size());
std::fprintf(nfile,"COLOR_SCALARS colors 4\n");
const tc tcmax = cimg::type<tc>::max();
cimglist_for(colors,t)
std::fprintf(nfile,"%f %f %f %f\n",
(float)colors[t](0)/tcmax,
(float)colors[t](1)/tcmax,
(float)colors[t](2)/tcmax,
opacities[t](0));
std::fprintf(nfile,"\n");
// Close file
cimg::fclose(nfile);
return *this;
}
#endif /* cimg_plugin_vtk */
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