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#include <gmsh.h>
#include <set>
#include <cstdlib> // for rand()
int main(int argc, char **argv)
{
// number of points to tetrahedralize
std::size_t N = 100;
gmsh::initialize();
gmsh::option::setNumber("Mesh.Algorithm3D", 10); // new Delaunay algo
std::vector<double> points(3 * N), steiner;
std::vector<std::size_t> tags(N);
for(auto i = 0; i < N; ++i) {
tags[i] = i + 1;
points[3 * i] = (double)std::rand() / (double)RAND_MAX;
points[3 * i + 1] = (double)std::rand() / (double)RAND_MAX;
points[3 * i + 2] = (double)std::rand() / (double)RAND_MAX;
}
std::vector<std::size_t> tets;
gmsh::algorithm::tetrahedralize(points, tets, steiner);
std::set<std::string> args(argv, argv + argc);
if(!args.count("-nopopup")) {
int vol = gmsh::model::addDiscreteEntity(3);
gmsh::model::mesh::addNodes(3, vol, tags, points);
gmsh::model::mesh::addElementsByType(vol, 4, {}, tets);
gmsh::fltk::run();
}
gmsh::finalize();
return 0;
}
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