Squashed 'third_party/cimg/' content from commit 4b66369
Change-Id: I7454d9107a08dba899fd4659731733049165ae0a
git-subtree-dir: third_party/cimg
git-subtree-split: 4b66369ab4e34a46119d6c43e9adce061bb40f4b
diff --git a/examples/image_surface3d.cpp b/examples/image_surface3d.cpp
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+/*
+ #
+ # File : image_surface3d.cpp
+ # ( C++ source file )
+ #
+ # Description : This tool allows to show an image as a 3D surface.
+ # This file is a part of the CImg Library project.
+ # ( http://cimg.eu )
+ #
+ # Copyright : David Tschumperle
+ # ( http://tschumperle.users.greyc.fr/ )
+ #
+ # 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.
+ #
+*/
+
+#include "CImg.h"
+using namespace cimg_library;
+#ifndef cimg_imagepath
+#define cimg_imagepath "img/"
+#endif
+
+// Main procedure
+//----------------
+int main(int argc,char **argv) {
+
+ // Read command line arguments.
+ cimg_usage("Render an image as a surface");
+ const char *file_i = cimg_option("-i",cimg_imagepath "logo.bmp","Input image");
+ const char *file_o = cimg_option("-o",(char*)0,"Output 3D object");
+ const float sigma = cimg_option("-smooth",1.0f,"Amount of image smoothing");
+ const float ratioz = cimg_option("-z",0.25f,"Aspect ratio along z-axis");
+ const unsigned int di = cimg_option("-di",10,"Step for isophote skipping");
+
+ // Load 2D image file.
+ std::fprintf(stderr,"\n- Load file '%s'",cimg::basename(file_i)); std::fflush(stderr);
+ const CImg<unsigned char>
+ img = CImg<>(file_i).blur(sigma).resize(-100,-100,1,3),
+ norm = img.get_norm().normalize(0,255);
+
+ // Compute surface with triangles.
+ std::fprintf(stderr,"\n- Create image surface"); std::fflush(stderr);
+ CImgList<unsigned int> primitives;
+ CImgList<unsigned char> colors;
+ const CImg<> points = img.get_elevation3d(primitives,colors,norm*-ratioz);
+
+ // Compute image isophotes.
+ std::fprintf(stderr,"\n- Compute image isophotes"); std::fflush(stderr);
+ CImgList<unsigned int> isoprimitives;
+ CImgList<unsigned char> isocolors;
+ CImg<> isopoints;
+ for (unsigned int i = 0; i<255; i+=di) {
+ CImgList<> prims;
+ const CImg<> pts = norm.get_isoline3d(prims,(float)i);
+ isopoints.append_object3d(isoprimitives,pts,prims);
+ }
+ cimglist_for(isoprimitives,l) {
+ const unsigned int i0 = isoprimitives(l,0);
+ const float x0 = isopoints(i0,0), y0 = isopoints(i0,1);
+ const unsigned char
+ r = (unsigned char)img.linear_atXY(x0,y0,0),
+ g = (unsigned char)img.linear_atXY(x0,y0,1),
+ b = (unsigned char)img.linear_atXY(x0,y0,2);
+ isocolors.insert(CImg<unsigned char>::vector(r,g,b));
+ }
+ cimg_forX(isopoints,ll) isopoints(ll,2) = -ratioz*norm.linear_atXY(isopoints(ll,0),isopoints(ll,1));
+
+ // Save object if necessary
+ if (file_o) {
+ std::fprintf(stderr,"\n- Save 3d object as '%s'",cimg::basename(file_o)); std::fflush(stderr);
+ points.save_off(primitives,colors,file_o);
+ }
+
+ // Enter event loop
+ std::fprintf(stderr,
+ "\n- Enter interactive loop.\n\n"
+ "Reminder : \n"
+ " + Use mouse to rotate and zoom object\n"
+ " + key 'F' : Toggle fullscreen\n"
+ " + key 'Q' or 'ESC' : Quit\n"
+ " + Any other key : Change rendering type\n\n"); std::fflush(stderr);
+ const char *const title = "Image viewed as a surface";
+ CImgDisplay disp(800,600,title,0);
+ unsigned int rtype = 2;
+ CImg<float> pose = CImg<float>::identity_matrix(4);
+
+ while (!disp.is_closed()) {
+ const unsigned char white[3]={ 255, 255, 255 };
+ CImg<unsigned char> visu(disp.width(),disp.height(),1,3,0);
+ visu.draw_text(10,10,"%s",white,0,1,24,
+ rtype==0?"Points":(rtype==1?"Lines":(rtype==2?"Faces":(rtype==3?"Flat-shaded faces":
+ (rtype==4?"Gouraud-shaded faces":(rtype==5?"Phong-shaded faces":"Isophotes"))))));
+ static bool first_time = true;
+ if (rtype==6) visu.display_object3d(disp,isopoints,isoprimitives,isocolors,first_time,1,-1,true,
+ 500.0f,0.0f,0.0f,-5000.0f,0.0f,0.0f,true,pose.data());
+ else visu.display_object3d(disp,points,primitives,colors,first_time,rtype,-1,true,
+ 500.0f,0.0f,0.0f,-5000.0f,0.0f,0.0f,true,pose.data());
+ first_time = false;
+ switch (disp.key()) {
+ case 0: break;
+ case cimg::keyBACKSPACE: rtype = (7 + rtype - 1)%7; break;
+ case cimg::keyQ:
+ case cimg::keyESC: disp.close(); break;
+ case cimg::keyF:
+ if (disp.is_fullscreen()) disp.resize(800,600); else disp.resize(disp.screen_width(),disp.screen_height());
+ disp.toggle_fullscreen();
+ break;
+ default: rtype = (rtype + 1)%7; break;
+ }
+ }
+
+ return 0;
+}