[vtkusers] problem about vtkFeatureEdges...

[lab_zj]

When apply vtkFeatureEdges to a dataset that has been processed by vtkPolyDataNormals or others, then the
result seems not expected:

vtkPolyData *pointset=myFunctionCreatePointSet();

vtkDelaunay2D *del=vtkDelaunay2D::New();
del->SetInput(pointset);

vtkPolyDataNormals *nrms=vtkPolyDataNormals::New();
nrms->SetInputConnect(del->GetOutputPort());

vtkSmoothPolyDataFilter *sf=vtkSmoothPolyDataFilter::New();
sf->SetInputConnect(nrms->GetOutputPort());

/* Here, only input connected to del when results is correct.
    because when display tb, many edges it not "BoundaryEdges".
    that is vtkPolyDataNormals or vtkSmoothPolyDataFilter has changed
    the topology of Delaunay mesh. So how to avoid this problem?
    I only want to get BoundaryEdges, just using del as input?
*/
vtkFeatureEdges *fe=vtkFeatureEdges::New();
fe->SetInputConnect(sf->GetOutputPort());
fe->BoundaryEdgesOn();
fe->FeatureEdgesOff();
fe->ManifoldEdgesOff();
fe->NonManifoldEdgesOff();
fe->ColoringOff();

vtkTubeFilter *tb=vtkTubeFilter::New();
tb->SetInputConnect(fe->GetOutputPort());
tb->SetRadius(0.5);
tb->SetNumberOfSides(6);

// mapper tb and display...
... ...





lab_zj
2009-01-15
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20090115/c90d2897/attachment.htm>