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141 lines
5.9 KiB
C++
141 lines
5.9 KiB
C++
/*
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#
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# File : image_surface3d.cpp
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# ( C++ source file )
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#
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# Description : This tool allows to show an image as a 3D surface.
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# This file is a part of the CImg Library project.
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# ( http://cimg.eu )
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#
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# Copyright : David Tschumperlé
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# ( http://tschumperle.users.greyc.fr/ )
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#
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# License : CeCILL v2.0
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# ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
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#
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# This software is governed by the CeCILL license under French law and
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# abiding by the rules of distribution of free software. You can use,
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# modify and/ or redistribute the software under the terms of the CeCILL
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# license as circulated by CEA, CNRS and INRIA at the following URL
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# "http://www.cecill.info".
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#
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# As a counterpart to the access to the source code and rights to copy,
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# modify and redistribute granted by the license, users are provided only
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# with a limited warranty and the software's author, the holder of the
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# economic rights, and the successive licensors have only limited
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# liability.
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#
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# In this respect, the user's attention is drawn to the risks associated
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# with loading, using, modifying and/or developing or reproducing the
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# software by the user in light of its specific status of free software,
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# that may mean that it is complicated to manipulate, and that also
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# therefore means that it is reserved for developers and experienced
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# professionals having in-depth computer knowledge. Users are therefore
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# encouraged to load and test the software's suitability as regards their
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# requirements in conditions enabling the security of their systems and/or
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# data to be ensured and, more generally, to use and operate it in the
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# same conditions as regards security.
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#
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# The fact that you are presently reading this means that you have had
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# knowledge of the CeCILL license and that you accept its terms.
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#
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*/
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#include "CImg.h"
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using namespace cimg_library;
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#ifndef cimg_imagepath
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#define cimg_imagepath "img/"
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#endif
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// Main procedure
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//----------------
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int main(int argc,char **argv) {
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// Read command line arguments.
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cimg_usage("Render an image as a surface");
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const char *file_i = cimg_option("-i",cimg_imagepath "logo.bmp","Input image");
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const char *file_o = cimg_option("-o",(char*)0,"Output 3D object");
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const float sigma = cimg_option("-smooth",1.0f,"Amount of image smoothing");
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const float ratioz = cimg_option("-z",0.25f,"Aspect ratio along z-axis");
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const unsigned int di = cimg_option("-di",10,"Step for isophote skipping");
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// Load 2D image file.
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std::fprintf(stderr,"\n- Load file '%s'",cimg::basename(file_i)); std::fflush(stderr);
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const CImg<unsigned char>
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img = CImg<>(file_i).blur(sigma).resize(-100,-100,1,3),
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norm = img.get_norm().normalize(0,255);
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// Compute surface with triangles.
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std::fprintf(stderr,"\n- Create image surface"); std::fflush(stderr);
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CImgList<unsigned int> primitives;
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CImgList<unsigned char> colors;
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const CImg<> points = img.get_elevation3d(primitives,colors,norm*-ratioz);
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// Compute image isophotes.
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std::fprintf(stderr,"\n- Compute image isophotes"); std::fflush(stderr);
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CImgList<unsigned int> isoprimitives;
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CImgList<unsigned char> isocolors;
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CImg<> isopoints;
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for (unsigned int i = 0; i<255; i+=di) {
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CImgList<> prims;
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const CImg<> pts = norm.get_isoline3d(prims,(float)i);
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isopoints.append_object3d(isoprimitives,pts,prims);
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}
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cimglist_for(isoprimitives,l) {
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const unsigned int i0 = isoprimitives(l,0);
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const float x0 = isopoints(i0,0), y0 = isopoints(i0,1);
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const unsigned char
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r = (unsigned char)img.linear_atXY(x0,y0,0),
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g = (unsigned char)img.linear_atXY(x0,y0,1),
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b = (unsigned char)img.linear_atXY(x0,y0,2);
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isocolors.insert(CImg<unsigned char>::vector(r,g,b));
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}
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cimg_forX(isopoints,ll) isopoints(ll,2) = -ratioz*norm.linear_atXY(isopoints(ll,0),isopoints(ll,1));
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// Save object if necessary
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if (file_o) {
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std::fprintf(stderr,"\n- Save 3d object as '%s'",cimg::basename(file_o)); std::fflush(stderr);
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points.save_off(primitives,colors,file_o);
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}
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// Enter event loop
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std::fprintf(stderr,
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"\n- Enter interactive loop.\n\n"
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"Reminder : \n"
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" + Use mouse to rotate and zoom object\n"
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" + key 'F' : Toggle fullscreen\n"
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" + key 'Q' or 'ESC' : Quit\n"
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" + Any other key : Change rendering type\n\n"); std::fflush(stderr);
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const char *const title = "Image viewed as a surface";
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CImgDisplay disp(800,600,title,0);
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unsigned int rtype = 2;
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CImg<float> pose = CImg<float>::identity_matrix(4);
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while (!disp.is_closed()) {
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const unsigned char white[3]={ 255, 255, 255 };
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CImg<unsigned char> visu(disp.width(),disp.height(),1,3,0);
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visu.draw_text(10,10,"%s",white,0,1,24,
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rtype==0?"Points":(rtype==1?"Lines":(rtype==2?"Faces":(rtype==3?"Flat-shaded faces":
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(rtype==4?"Gouraud-shaded faces":(rtype==5?"Phong-shaded faces":"Isophotes"))))));
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static bool first_time = true;
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if (rtype==6) visu.display_object3d(disp,isopoints,isoprimitives,isocolors,first_time,1,-1,true,
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500.0f,0.0f,0.0f,-5000.0f,0.0f,0.0f,true,pose.data());
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else visu.display_object3d(disp,points,primitives,colors,first_time,rtype,-1,true,
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500.0f,0.0f,0.0f,-5000.0f,0.0f,0.0f,true,pose.data());
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first_time = false;
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switch (disp.key()) {
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case 0: break;
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case cimg::keyBACKSPACE: rtype = (7 + rtype - 1)%7; break;
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case cimg::keyQ:
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case cimg::keyESC: disp.close(); break;
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case cimg::keyF:
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if (disp.is_fullscreen()) disp.resize(800,600); else disp.resize(disp.screen_width(),disp.screen_height());
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disp.toggle_fullscreen();
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break;
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default: rtype = (rtype + 1)%7; break;
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}
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}
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return 0;
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}
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