62 lines
1.6 KiB
C++
Executable File
62 lines
1.6 KiB
C++
Executable File
#include <igl/readOFF.h>
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#include <igl/opengl/glfw/Viewer.h>
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#include <igl/per_vertex_normals.h>
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#include <igl/per_face_normals.h>
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#include <igl/per_corner_normals.h>
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#include <iostream>
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#include "tutorial_shared_path.h"
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Eigen::MatrixXd V;
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Eigen::MatrixXi F;
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Eigen::MatrixXd N_vertices;
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Eigen::MatrixXd N_faces;
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Eigen::MatrixXd N_corners;
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// This function is called every time a keyboard button is pressed
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bool key_down(igl::opengl::glfw::Viewer& viewer, unsigned char key, int modifier)
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{
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switch(key)
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{
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case '1':
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viewer.data().set_normals(N_faces);
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return true;
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case '2':
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viewer.data().set_normals(N_vertices);
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return true;
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case '3':
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viewer.data().set_normals(N_corners);
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return true;
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default: break;
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}
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return false;
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}
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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 "/fandisk.off", V, F);
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// Compute per-face normals
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igl::per_face_normals(V,F,N_faces);
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// Compute per-vertex normals
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igl::per_vertex_normals(V,F,N_vertices);
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// Compute per-corner normals, |dihedral angle| > 20 degrees --> crease
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igl::per_corner_normals(V,F,20,N_corners);
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// Plot the mesh
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igl::opengl::glfw::Viewer viewer;
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viewer.callback_key_down = &key_down;
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viewer.data().show_lines = false;
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viewer.data().set_mesh(V, F);
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viewer.data().set_normals(N_faces);
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std::cout<<
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"Press '1' for per-face normals."<<std::endl<<
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"Press '2' for per-vertex normals."<<std::endl<<
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"Press '3' for per-corner normals."<<std::endl;
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viewer.launch();
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}
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