int VTKMeshExporter::RequestData(
vtkInformation* vtkNotUsed(request),
vtkInformationVector** inputVector,
vtkInformationVector* outputVector) {
update(); // Run FAST pipeline
Mesh::pointer input = getStaticInputData<Mesh>();
MeshAccess::pointer access = input->getMeshAccess(ACCESS_READ);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkPolyData *output = this->GetOutput();
vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
points->SetNumberOfPoints(input->getNrOfVertices());
for(int i = 0; i < input->getNrOfVertices(); i++) {
MeshVertex v = access->getVertex(i);
VectorXf position = v.getPosition();
if(input->getDimensions() == 2) {
points->SetPoint(i, position.x(), position.y(), 0);
} else {
points->SetPoint(i, position.x(), position.y(), position.z());
}
}
output->SetPoints(points);
vtkSmartPointer<vtkCellArray> polys = vtkSmartPointer<vtkCellArray>::New();
if(input->getDimensions() == 2) {
for(int i = 0; i < input->getNrOfLines(); i++) {
VectorXui line = access->getLine(i);
polys->InsertNextCell(2);
polys->InsertCellPoint(line.x());
polys->InsertCellPoint(line.y());
}
output->SetLines(polys);
} else {
for(int i = 0; i < input->getNrOfTriangles(); i++) {
VectorXui triangle = access->getTriangle(i);
polys->InsertNextCell(3);
polys->InsertCellPoint(triangle.x());
polys->InsertCellPoint(triangle.y());
polys->InsertCellPoint(triangle.z());
}
output->SetPolys(polys);
}
// TODO if 3D, also export normals
return 1;
}
