File size: 2,043 Bytes
5b89cb9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | #include <igl/readOBJ.h>
#include <igl/opengl/glfw/Viewer.h>
#include <igl/exact_geodesic.h>
#include <igl/unproject_onto_mesh.h>
#include <igl/parula.h>
#include <igl/isolines_map.h>
#include <igl/PI.h>
#include <iostream>
int main(int argc, char *argv[])
{
using namespace Eigen;
using namespace std;
Eigen::MatrixXd V;
Eigen::MatrixXi F;
igl::opengl::glfw::Viewer viewer;
// Load a mesh in OFF format
igl::readOBJ(TUTORIAL_SHARED_PATH "/armadillo.obj", V, F);
const auto update_distance = [&](const int vid)
{
Eigen::VectorXi VS,FS,VT,FT;
// The selected vertex is the source
VS.resize(1);
VS << vid;
// All vertices are the targets
VT.setLinSpaced(V.rows(),0,V.rows()-1);
Eigen::VectorXd d;
std::cout<<"Computing geodesic distance to vertex "<<vid<<"..."<<std::endl;
igl::exact_geodesic(V,F,VS,FS,VT,FT,d);
// Plot the mesh
Eigen::MatrixXd CM;
igl::parula(Eigen::VectorXd::LinSpaced(21,0,1).eval(),false,CM);
igl::isolines_map(Eigen::MatrixXd(CM),CM);
viewer.data().set_colormap(CM);
viewer.data().set_data(d);
};
// Plot a distance when a vertex is picked
viewer.callback_mouse_down =
[&](igl::opengl::glfw::Viewer& viewer, int, int)->bool
{
int fid;
Eigen::Vector3f bc;
// Cast a ray in the view direction starting from the mouse position
double x = viewer.current_mouse_x;
double y = viewer.core().viewport(3) - viewer.current_mouse_y;
if(igl::unproject_onto_mesh(
Eigen::Vector2f(x,y),
viewer.core().view,
viewer.core().proj,
viewer.core().viewport,
V,
F,
fid,
bc))
{
int max;
bc.maxCoeff(&max);
int vid = F(fid,max);
update_distance(vid);
return true;
}
return false;
};
viewer.data().set_mesh(V,F);
viewer.data().show_lines = false;
cout << "Click on mesh to define new source.\n" << std::endl;
update_distance(0);
return viewer.launch();
}
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