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List:       vtkusers
Subject:    Re: [vtkusers] intersection between the polydata and volume
From:       Bill Lorensen <bill.lorensen () gmail ! com>
Date:       2012-03-29 20:03:05
Message-ID: CADZJ4hN6MVs9L0c1fYOf3-ScMsorVij2b9ujSTbT3OEKM7KFgQ () mail ! gmail ! com
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You could create a volume of signed distances to your polydata using
vtkImplicitPolyDataDistance and vtkSampleFunction. Make sure the
sample function's ModelBounds and dimensions are the same for your
original volume and the sampled volume.
Then, using vtkImplicitVolume with SetVolume set to the output of the
SampleFunction, you can call EvaluateFunction with a coordinate. If
the result is negative the point is inside, if positive it is outside.

I don't think there is a single filter that will do what you want.

On Wed, Mar 28, 2012 at 11:43 PM, qwcbeyond <340181048@qq.com> wrote:
> Hi，everyone.Is it possible to calculate the intersection between the polydata
> and volume ? The final result is I want to get which voxels are inside the
> polydata   and get the voxel position (x,y,z).
> Thanks.
> 
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