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@maz-1
Created January 27, 2021 06:37
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const float resize_ratio = 2.0;
actorDroneMesh = vtkSmartPointer<vtkLODActor>::New ();
auto sharedData = SharedData::getSharedData(this->window());
OpenMesh::PolyMesh_ArrayKernelT< > mesh_out;
OpenMesh::IO::Options OptionRead(OpenMesh::IO::Options::Binary);
QFile file_model(":/models/drone.stl");
file_model.open(QIODevice::ReadOnly);
QStdIStream drone_model_data(&file_model);
OpenMesh::IO::read_mesh(mesh_out, drone_model_data, "stl", OptionRead);
vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New ();
vtkIdType nr_points = mesh_out.n_vertices();
points->SetNumberOfPoints (nr_points);
float *data = static_cast<vtkFloatArray*> (points->GetData ())->GetPointer (0);
vtkIdType ptr = 0;
BOOST_FOREACH(auto v, mesh_out.vertices()) {
auto point = mesh_out.point(v);
//std::copy (&(point[0]), &(point[0]) + 3, &data[ptr]);
data[ptr] = point[0] * resize_ratio;
data[ptr + 1] = point[1] * resize_ratio;
data[ptr + 2] = point[2] * resize_ratio;
ptr += 3;
}
vtkSmartPointer<vtkCellArray> cell_array = vtkSmartPointer<vtkCellArray>::New ();
vtkIdType *cell = cell_array->WritePointer (mesh_out.n_faces(), mesh_out.n_faces() * 4);
int idx = 0;
BOOST_FOREACH(auto f, mesh_out.faces()) {
*cell++ = 3;
for (auto fv_it = mesh_out.fv_iter(f); fv_it.is_valid(); ++fv_it, ++idx) {
*cell++ = (*fv_it).idx();
}
++idx;
}
vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New ();
cell_array->GetData ()->SetNumberOfValues (idx);
cell_array->Squeeze ();
polydata->SetPolys (cell_array);
polydata->SetPoints (points);
vtkSmartPointer<vtkDataSetMapper> mapper = vtkSmartPointer<vtkDataSetMapper>::New ();
mapper->SetInputData (polydata);
actorDroneMesh->SetNumberOfCloudPoints (int (std::max<vtkIdType> (1, polydata->GetNumberOfPoints () / 10)));
actorDroneMesh->GetProperty ()->SetInterpolationToFlat ();
actorDroneMesh->SetMapper (mapper);
actorDroneMesh->GetProperty ()->SetRepresentationToSurface ();
// Backface culling renders the visualization slower, but guarantees that we see all triangles
actorDroneMesh->GetProperty ()->BackfaceCullingOff ();
actorDroneMesh->GetProperty ()->SetInterpolationToFlat ();
actorDroneMesh->GetProperty ()->EdgeVisibilityOff ();
actorDroneMesh->GetProperty ()->ShadingOff ();
//renderer->AddActor(actorDroneMesh);
file_model.close();
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