Alec Jacobson
1fe4eb190f
This reverts commit65aa93e9ef[formerly47634615ce]. Former-commit-id:fd8d66156c
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
#include <igl/opengl/glfw/Viewer.h>
|
|
#include <igl/copyleft/tetgen/tetrahedralize.h>
|
|
#include <igl/readOBJ.h>
|
|
#include <igl/marching_tets.h>
|
|
#include <Eigen/Core>
|
|
|
|
#include "tutorial_shared_path.h"
|
|
|
|
|
|
int main(int argc, char * argv[])
|
|
{
|
|
|
|
// Load a surface mesh which is a cube
|
|
Eigen::MatrixXd surfaceV;
|
|
Eigen::MatrixXi surfaceF;
|
|
igl::readOBJ(TUTORIAL_SHARED_PATH "/cube.obj", surfaceV, surfaceF);
|
|
|
|
// Find the centroid of the loaded mesh
|
|
Eigen::RowVector3d surfaceCenter = surfaceV.colwise().sum() / surfaceV.rows();
|
|
|
|
// Center the mesh about the origin
|
|
surfaceV.rowwise() -= surfaceCenter;
|
|
|
|
// Tetrahedralize the surface mesh
|
|
Eigen::MatrixXd TV; // Tet mesh vertices
|
|
Eigen::MatrixXi TF; // Tet mesh boundary face indices
|
|
Eigen::MatrixXi TT; // Tet mesh tetrahedron indices
|
|
igl::copyleft::tetgen::tetrahedralize(surfaceV, surfaceF, "pq1.414a0.0001", TV, TT, TF);
|
|
|
|
// Compute a scalar at each tet vertex which is the distance from the vertex to the origin
|
|
Eigen::VectorXd S = TV.rowwise().norm();
|
|
|
|
// Compute a mesh (stored in SV, SF) representing the iso-level-set for the isovalue 0.5
|
|
Eigen::MatrixXd SV;
|
|
Eigen::MatrixXi SF;
|
|
igl::marching_tets(TV, TT, S, 0.45, SV, SF);
|
|
|
|
// Draw the mesh stored in (SV, SF)
|
|
igl::opengl::glfw::Viewer viewer;
|
|
viewer.data().set_mesh(SV, SF);
|
|
viewer.callback_key_down =
|
|
[&](igl::opengl::glfw::Viewer & viewer, unsigned char key, int mod)->bool
|
|
{
|
|
viewer.data().set_face_based(true);
|
|
return true;
|
|
};
|
|
viewer.launch();
|
|
}
|