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