76 lines
2.1 KiB
C++
Executable File
76 lines
2.1 KiB
C++
Executable File
#include <igl/readOBJ.h>
|
|
#include <igl/opengl/glfw/Viewer.h>
|
|
#include <igl/exact_geodesic.h>
|
|
#include <igl/colormap.h>
|
|
#include <igl/unproject_onto_mesh.h>
|
|
#include <igl/PI.h>
|
|
#include <iostream>
|
|
#include "tutorial_shared_path.h"
|
|
|
|
|
|
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);
|
|
const double strip_size = 0.05;
|
|
// The function should be 1 on each integer coordinate
|
|
d = (d/strip_size*igl::PI).array().sin().abs().eval();
|
|
// Compute per-vertex colors
|
|
Eigen::MatrixXd C;
|
|
igl::colormap(igl::COLOR_MAP_TYPE_INFERNO,d,false,C);
|
|
// Plot the mesh
|
|
viewer.data().set_mesh(V, F);
|
|
viewer.data().set_colors(C);
|
|
};
|
|
|
|
// 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);
|
|
|
|
cout << "Click on mesh to define new source.\n" << std::endl;
|
|
update_distance(0);
|
|
return viewer.launch();
|
|
}
|