mirror of
https://github.com/RetroDECK/ES-DE.git
synced 2024-11-23 14:45:38 +00:00
114 lines
5 KiB
C++
114 lines
5 KiB
C++
/*
|
|
#
|
|
# 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 Tschumperlé
|
|
# ( 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;
|
|
}
|