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112 lines
2.7 KiB
112 lines
2.7 KiB
#include "isolines_colormap.h"
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#include "update.h"
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#include <igl/read_triangle_mesh.h>
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#include <igl/heat_geodesics.h>
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#include <igl/avg_edge_length.h>
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#include <igl/opengl/glfw/Viewer.h>
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#include <iostream>
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int main(int argc, char *argv[])
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{
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Eigen::MatrixXi F;
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Eigen::MatrixXd V;
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igl::read_triangle_mesh( argc>1?argv[1]: TUTORIAL_SHARED_PATH "/beetle.off",V,F);
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double t = std::pow(igl::avg_edge_length(V,F),2);
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// Precomputation
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igl::HeatGeodesicsData<double> data;
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const auto precompute = [&]()
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{
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if(!igl::heat_geodesics_precompute(V,F,t,data))
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{
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std::cerr<<"Error: heat_geodesics_precompute failed."<<std::endl;
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exit(EXIT_FAILURE);
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};
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};
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precompute();
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igl::opengl::glfw::Viewer viewer;
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bool down_on_mesh = false;
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const auto update = [&]()->bool
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{
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const double x = viewer.current_mouse_x;
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const double y = viewer.core().viewport(3) - viewer.current_mouse_y;
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Eigen::VectorXd D;
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if(::update(
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V,F,t,x,y,
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viewer.core().view,viewer.core().proj,viewer.core().viewport,
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data,
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D))
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{
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viewer.data().set_data(D);
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return true;
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}
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return false;
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};
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viewer.callback_mouse_down =
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[&](igl::opengl::glfw::Viewer& viewer, int, int)->bool
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{
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if(update())
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{
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down_on_mesh = true;
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return true;
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}
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return false;
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};
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viewer.callback_mouse_move =
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[&](igl::opengl::glfw::Viewer& viewer, int, int)->bool
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{
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if(down_on_mesh)
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{
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update();
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return true;
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}
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return false;
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};
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viewer.callback_mouse_up =
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[&down_on_mesh](igl::opengl::glfw::Viewer& viewer, int, int)->bool
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{
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down_on_mesh = false;
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return false;
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};
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std::cout<<R"(Usage:
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[click] Click on shape to pick new geodesic distance source
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,/. Decrease/increase t by factor of 10.0
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D,d Toggle using intrinsic Delaunay discrete differential operators
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)";
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viewer.callback_key_pressed =
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[&](igl::opengl::glfw::Viewer& /*viewer*/, unsigned int key, int mod)->bool
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{
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switch(key)
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{
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default:
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return false;
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case 'D':
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case 'd':
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data.use_intrinsic_delaunay = !data.use_intrinsic_delaunay;
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std::cout<<(data.use_intrinsic_delaunay?"":"not ")<<
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"using intrinsic delaunay..."<<std::endl;
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precompute();
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update();
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break;
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case '.':
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case ',':
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t *= (key=='.'?10.0:0.1);
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precompute();
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update();
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std::cout<<"t: "<<t<<std::endl;
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break;
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}
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return true;
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};
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// Show mesh
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viewer.data().set_mesh(V, F);
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viewer.data().set_data(Eigen::VectorXd::Zero(V.rows()));
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viewer.data().set_colormap(isolines_colormap());
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viewer.data().show_lines = false;
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viewer.launch();
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}
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