99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
#include <igl/readOFF.h>
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#include <igl/combine.h>
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#include <igl/opengl/glfw/Viewer.h>
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#include <igl/opengl/glfw/imgui/ImGuiMenu.h>
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#include <igl/fast_find_intersections.h>
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Eigen::MatrixXd V1,V2;
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Eigen::MatrixXi F1,F2;
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igl::AABB<Eigen::MatrixXd,3> tree;
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double min_z,max_z;
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double slice_z;
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void update_visualization(igl::opengl::glfw::Viewer & viewer)
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{
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Eigen::MatrixXi I;
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Eigen::MatrixXd edges;
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//shifted intersection object
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Eigen::MatrixXd V2_(V2.rows(),V2.cols());
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V2_<< V2.col(0), V2.col(1), V2.col(2).array()+slice_z;
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igl::fast_find_intersections(tree, V1,F1, V2_,F2, I,edges);
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Eigen::MatrixXi edges_link=Eigen::MatrixXi::NullaryExpr(edges.rows()/2,2, [](int i,int j) { return i*2+j;});
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// Plot the edges of the intersects
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viewer.data().set_edges ( edges, edges_link, Eigen::RowVector3d(1,0,0));
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// show faces which are intersected
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Eigen::VectorXd face_data=Eigen::VectorXd::Zero(F1.rows());
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for(int i=0; i<I.rows(); ++i)
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face_data(I(i,0)) = 1.0;
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viewer.data().set_data(face_data);
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}
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bool key_down(igl::opengl::glfw::Viewer& viewer, unsigned char key, int mod)
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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 '.':
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slice_z = std::min(slice_z+0.01,max_z);
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break;
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case ',':
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slice_z = std::max(slice_z-0.01,min_z);
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break;
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}
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update_visualization(viewer);
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return true;
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}
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int main(int argc, char *argv[])
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{
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// Load two meshes
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igl::readOFF(TUTORIAL_SHARED_PATH "/cow.off", V1, F1);
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igl::readOFF(TUTORIAL_SHARED_PATH "/planexy.off", V2, F2);
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// initialize AABB tree with first mesh (it doesn't move)
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tree.init(V1,F1);
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std::cout<<"Usage:"<<std::endl;
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std::cout<<"'.'/',' push back/pull forward slicing plane."<<std::endl;
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std::cout<<std::endl;
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min_z=V1.col(2).minCoeff();
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max_z=V1.col(2).maxCoeff();
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slice_z=(max_z+min_z)/2;
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//center slicing object
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V2.col(2).array() -= V2.col(2).array().mean();
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// Plot the mesh
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igl::opengl::glfw::Viewer viewer;
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viewer.data().set_mesh(V1, F1);
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update_visualization(viewer);
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igl::opengl::glfw::imgui::ImGuiMenu menu;
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//plugin.widgets.push_back(&menu);
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menu.callback_draw_viewer_window = [](){};
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viewer.callback_key_down = &key_down;
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// show the cow closer
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viewer.core().camera_zoom = 2.0;
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// Launch the viewer
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viewer.launch();
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}
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