#include <igl/readOFF.h> #include <igl/viewer/Viewer.h> #include <iostream> Eigen::MatrixXd V1,V2; Eigen::MatrixXi F1,F2; // This function is called every time a keyboard button is pressed bool key_down(igl::viewer::Viewer& viewer, unsigned char key, int modifier) { std::cout<<"Key: "<<key<<" "<<(unsigned int)key<<std::endl; if (key == '1') { // Clear should be called before drawing the mesh viewer.data.clear(); // Draw_mesh creates or updates the vertices and faces of the displayed mesh. // If a mesh is already displayed, draw_mesh returns an error if the given V and // F have size different than the current ones viewer.data.set_mesh(V1, F1); viewer.core.align_camera_center(V1,F1); } else if (key == '2') { viewer.data.clear(); viewer.data.set_mesh(V2, F2); viewer.core.align_camera_center(V2,F2); } return false; } int main(int argc, char *argv[]) { // Load two meshes igl::readOFF("../shared/bumpy.off", V1, F1); igl::readOFF("../shared/fertility.off", V2, F2); std::cout<<R"( 1 Switch to bump mesh 2 Switch to fertility mesh )"; igl::viewer::Viewer viewer; // Register a keyboard callback that allows to switch between // the two loaded meshes viewer.callback_key_down = &key_down; viewer.data.set_mesh(V1, F1); viewer.launch(); }