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/spherical_function3d.cpp b/examples/spherical_function3d.cpp
new file mode 100644
index 0000000..54b6cbc
--- /dev/null
+++ b/examples/spherical_function3d.cpp
@@ -0,0 +1,113 @@
+/*
+ #
+ # File : spherical_function3d.cpp
+ # ( C++ source file )
+ #
+ # Description : An example that shows how to build custom 3D objects in CImg.
+ # 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;
+
+/*---------------------------
+
+ Main procedure
+
+ --------------------------*/
+int main() {
+
+ CImgList<unsigned char> object_colors;
+ CImgList<float> object_opacities;
+
+ // Define a 3D centered box.
+ CImg<float> object_vertices = CImg<float>(3,8,1,1, // Define the 8 vertices of the cube
+ -1,-1,-1, // (x0,y0,z0)
+ 1,-1,-1, // (x1,y1,z1)
+ 1,1,-1, // ...
+ -1,1,-1,
+ -1,-1,1,
+ 1,-1,1,
+ 1,1,1, // (x6,y6,z6)
+ -1,1,1).transpose(); // (x7,y7,z7)
+ CImgList<unsigned int> object_primitives(12,1,2,1,1, // Define the 12 segments of the cube
+ 0,1, 1,2, 2,3, 3,0,
+ 4,5, 5,6, 6,7, 7,4,
+ 0,4, 1,5, 2,6, 3,7);
+ object_colors.insert(object_primitives.size(),CImg<unsigned char>::vector(32,64,255));
+ object_opacities.insert(object_primitives.size(),CImg<float>::vector(0.3f));
+
+ // Define the spherical function's vertices.
+ CImgList<float> spherical_vertices;
+ const float a = 1;
+ const unsigned int na = 132, nb = 132;
+ for (unsigned int v = 0; v<na; ++v)
+ for (unsigned int u = 0; u<nb; ++u) {
+ const float
+ alpha = (float)(u*2*cimg::PI/nb),
+ beta = (float)(-cimg::PI/2 + v*cimg::PI/na),
+ x = (float)((a*std::cos(beta))*std::cos(alpha)),
+ y = (float)((a*std::cos(beta))*std::sin(alpha)),
+ z = (float)(a*std::sin(beta)),
+ altitude = cimg::abs(1 + 0.8f*std::cos(3*alpha)*std::sin(4*beta));
+ spherical_vertices.insert(CImg<float>::vector(altitude*x,altitude*y,altitude*z));
+ }
+
+ // Define the spherical function's mesh.
+ CImgList<unsigned int> spherical_primitives;
+ for (unsigned int vv = 0; vv<na - 1; ++vv)
+ for (unsigned int uu = 0; uu<nb; ++uu) {
+ const int nv = (vv + 1)%na, nu = (uu + 1)%nb;
+ spherical_primitives.insert(CImg<unsigned int>::vector(nb*vv + nu,nb*nv + uu,nb*vv + uu));
+ spherical_primitives.insert(CImg<unsigned int>::vector(nb*vv + nu,nb*nv + nu,nb*nv + uu));
+ object_colors.insert(CImg<>::vector(0,255,255));
+ object_colors.insert(CImg<>::vector(100,200,255));
+ object_opacities.insert(2,CImg<>::vector(1));
+ }
+
+ // Merge 3D objects together.
+ object_vertices.append_object3d(object_primitives,spherical_vertices>'x',spherical_primitives);
+ char title[4096] = { 0 };
+ std::sprintf(title,"3D Spherical Function (%u vertices, %u primitives)",
+ object_vertices.width(),object_primitives.size());
+ CImgDisplay disp(640,480,title,0);
+ CImg<unsigned char>(disp.width(),disp.height(),1,3,220).
+ display_object3d(disp,object_vertices,object_primitives,object_colors,object_opacities,true,4,3,false,
+ 500,0,0,-5000,0.1f,1.5f);
+
+ return 0;
+}