[vtkusers] points inside closed mesh

[Bryn Lloyd]

Hi,

try this:


   vtkOBBTree *obb = vtkOBBTree::New();
   obb->SetDataSet( pdmesh );
   obb->CacheCellBoundsOn();
   obb->SetTolerance(0.0);
   obb->BuildLocator();

   double p0[3] = {x, y, z}; // point used in query
   double p1[3] = {1e20,0.0,0.0};
   int code = obb->IntersectWithLine(p0,p1,0,0);
   // or : bool isInside = obb->InsideOrOutside(p0)<0;
   bool isInside = (code==-1);


Good luck,

Bryn





On Aug 23, 2008, at 12:24 PM, lucas Grijander wrote:

> Hi all,
>
> I have a closed 3D mesh and a cloud of 3D points. For my application  
> I have to find which points are inside the closed mesh and which are  
> outside. The shape of the mesh is random, we cannot apply convex  
> methods, etc... I would like to know if there is any method  
> implemented in vtk to solve this problem?
>
> best regards
>
> Lucas.
>
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