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79 lines
2.0 KiB
79 lines
2.0 KiB
1 year ago
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#include <igl/avg_edge_length.h>
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#include <igl/per_vertex_normals.h>
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#include <igl/readOFF.h>
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#include <igl/embree/ambient_occlusion.h>
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#include <igl/opengl/glfw/Viewer.h>
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#include <iostream>
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// Mesh
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Eigen::MatrixXd V;
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Eigen::MatrixXi F;
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Eigen::VectorXd AO;
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// It allows to change the degree of the field when a number 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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using namespace Eigen;
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using namespace std;
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const RowVector3d color(0.9,0.85,0.9);
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switch(key)
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{
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case '1':
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// Show the mesh without the ambient occlusion factor
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viewer.data().set_colors(color);
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break;
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case '2':
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{
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// Show the mesh with the ambient occlusion factor
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MatrixXd C = color.replicate(V.rows(),1);
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for (unsigned i=0; i<C.rows();++i)
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C.row(i) *= AO(i);//std::min<double>(AO(i)+0.2,1);
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viewer.data().set_colors(C);
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break;
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}
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case '.':
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viewer.core().lighting_factor += 0.1;
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break;
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case ',':
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viewer.core().lighting_factor -= 0.1;
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break;
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default: break;
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}
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viewer.core().lighting_factor =
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std::min(std::max(viewer.core().lighting_factor,0.f),1.f);
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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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using namespace std;
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using namespace Eigen;
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cout<<
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"Press 1 to turn off Ambient Occlusion"<<endl<<
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"Press 2 to turn on Ambient Occlusion"<<endl<<
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"Press . to turn up lighting"<<endl<<
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"Press , to turn down lighting"<<endl;
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// Load a mesh in OFF format
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igl::readOFF(TUTORIAL_SHARED_PATH "/fertility.off", V, F);
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MatrixXd N;
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igl::per_vertex_normals(V,F,N);
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// Compute ambient occlusion factor using embree
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igl::embree::ambient_occlusion(V,F,V,N,500,AO);
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AO = 1.0 - AO.array();
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// Show mesh
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igl::opengl::glfw::Viewer viewer;
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viewer.data().set_mesh(V, F);
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viewer.callback_key_down = &key_down;
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key_down(viewer,'2',0);
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viewer.data().show_lines = false;
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viewer.core().lighting_factor = 0.0f;
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viewer.launch();
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}
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