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97 lines
2.2 KiB
97 lines
2.2 KiB
1 year ago
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#include <igl/read_triangle_mesh.h>
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#include <igl/AABB.h>
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#include <igl/unique.h>
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#include <igl/opengl/glfw/Viewer.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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//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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Eigen::MatrixXi IF,EE;
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Eigen::MatrixXd EV;
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Eigen::VectorXi EI;
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igl::fast_find_intersections(tree, V1,F1, V2_,F2,false,false,IF,EV,EE,EI);
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// Plot the edges of the intersects
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viewer.data().set_edges( EV,EE, Eigen::RowVector3d(1,0,0));
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// show faces which are intersected
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Eigen::VectorXi I;
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igl::unique(IF,I);
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Eigen::VectorXd D = Eigen::MatrixXd::Zero(F1.rows(),1);
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D(I).setConstant(1.0);
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viewer.data().set_data(D,0,1,igl::COLOR_MAP_TYPE_PARULA);
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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::read_triangle_mesh(
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argc<=1?TUTORIAL_SHARED_PATH "/cow.off" :argv[1],V1,F1);
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igl::read_triangle_mesh(
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argc<=2?TUTORIAL_SHARED_PATH "/planexy.off":argv[2],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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viewer.data().set_face_based(true);
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update_visualization(viewer);
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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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