<div dir="ltr">I would suggest a different approach (much faster than the one you use now).<br><br>Use vtkPolydataToImageStencil to create a ImageStencil of your vtkPolydata ,then set it's output to vtkImageStencil. In vtkImageStencil ReverseStencilOff/On depending on what you want (inside of polydat or outside) then Setbackground to 0. Now you have a binarized volume. Now using pointers you could rapidly find out whether a given point/ voxel is inside or outside. (bool values different for in or out on ReverseStencilOff/ON).<br>
<br>Jothy<br><br><div class="gmail_quote">On Thu, Apr 5, 2012 at 10:13 AM, qwcbeyond <span dir="ltr"><<a href="mailto:340181048@qq.com">340181048@qq.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,Bill. Thanks for your response. I tried your method to determine whether<br>
the voxels in the polydata, but the only problem is it's too slow. I use<br>
the volume data(512*512*2) to test this method, it takes several minutes.<br>
If I use the 512*512*365 volume data,it will take me a long time.<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr">Jothy<br></div><br>
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