[vtkusers] Inside/Outside test in vtkOBBTree

[Carlos Martinez Burgos]

Hi.

Some days ago I asked to you if is there a method to test if a point is
inside a closed polydata. Somebody answered that is there a new method in
the vtkOBBTree class to test it.

I have tried to build the OBB Tree but I can't get good results. It
sometimes works and sometimes not. I first build the OBB Tree and after I
generate its representation. I don't get always a representation.

I have tried to change the OBBTree parameters like max level and tolerance
but no changes. I use this code (in Java):

obbTree=new vtkOBBTree();
obbTree.SetDataSet(polydata);
obbTree.SetMaxLevel(5);
obbTree.SetTolerance(0.0001);
obbTree.BuildLocator();

obb=new vtkPolyData();
obbTree.GenerateRepresentation(2,obb);

obbMapper=new vtkPolyDataMapper();
obbMapper.SetInput(obb);

obbActor=new vtkActor();
obbActor.SetMapper(obbMapper);
obbActor.GetProperty().SetRepresentationToWireframe();
obbActor.GetProperty().SetColor(1,0,0);
obbActor.PickableOff();

I don't know if my mistake is in the code or in the data used. I use
polydatas of few triangles, most times simply tetrahedrons. Could this be
a problem?


Furthermore I want to check if the polydata used is a closed polydata
because I'm not sure. Is there a method or a class in VTK to do this?


Do you think another method to test if a point is inside a closed
polydata?


Thanks and sorry for my language mistakes.

-- 
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Carlos Martínez Burgos      |     Instituto Tecnológico de Informática
Ingeniero Informático       |      Universidad Politécnica de Valencia
Tlf: +34 963877237          |                        Camí de Vera, S/N
cmarbur at iti.upv.es          |                   46071 Valencia - Spain
www.iti.upv.es/~cmarbur     |                           www.iti.upv.es
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