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84 lines
2.0 KiB
84 lines
2.0 KiB
1 year ago
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#include <igl/readOFF.h>
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#include <igl/opengl/glfw/Viewer.h>
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#include <igl/opengl/glfw/imgui/ImGuiPlugin.h>
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#include <igl/opengl/glfw/imgui/ImGuiMenu.h>
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#include <sstream>
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Eigen::MatrixXd V;
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Eigen::MatrixXi F;
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int main(int argc, char *argv[])
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{
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// Load a mesh in OFF format
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igl::readOFF(TUTORIAL_SHARED_PATH "/bunny.off", V, F);
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// Find the bounding box
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Eigen::Vector3d m = V.colwise().minCoeff();
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Eigen::Vector3d M = V.colwise().maxCoeff();
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// Corners of the bounding box
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Eigen::MatrixXd V_box(8,3);
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V_box <<
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m(0), m(1), m(2),
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M(0), m(1), m(2),
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M(0), M(1), m(2),
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m(0), M(1), m(2),
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m(0), m(1), M(2),
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M(0), m(1), M(2),
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M(0), M(1), M(2),
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m(0), M(1), M(2);
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// Edges of the bounding box
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Eigen::MatrixXi E_box(12,2);
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E_box <<
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0, 1,
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1, 2,
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2, 3,
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3, 0,
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4, 5,
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5, 6,
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6, 7,
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7, 4,
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0, 4,
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1, 5,
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2, 6,
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7 ,3;
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// Plot the mesh
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igl::opengl::glfw::Viewer viewer;
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viewer.data().set_mesh(V, F);
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// Plot the corners of the bounding box as points
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viewer.data().add_points(V_box,Eigen::RowVector3d(1,0,0));
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// Plot the edges of the bounding box
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for (unsigned i=0;i<E_box.rows(); ++i)
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viewer.data().add_edges
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(
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V_box.row(E_box(i,0)),
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V_box.row(E_box(i,1)),
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Eigen::RowVector3d(1,0,0)
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);
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// Plot labels with the coordinates of bounding box vertices
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std::stringstream l1;
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l1 << m(0) << ", " << m(1) << ", " << m(2);
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viewer.data().add_label(m+Eigen::Vector3d(-0.007, 0, 0),l1.str());
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std::stringstream l2;
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l2 << M(0) << ", " << M(1) << ", " << M(2);
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viewer.data().add_label(M+Eigen::Vector3d(0.007, 0, 0),l2.str());
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// activate label rendering
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viewer.data().show_custom_labels = true;
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// Rendering of text labels is handled by ImGui, so we need to enable the ImGui
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// plugin to show text labels.
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igl::opengl::glfw::imgui::ImGuiPlugin plugin;
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viewer.plugins.push_back(&plugin);
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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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// Launch the viewer
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viewer.launch();
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}
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