
<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Thanks for the reply Cory.<div class=""><br class=""></div><div class="">Found a simpler solution by using vtkCylinderSource and vtkCubeSource which can then be subtracted using vtkIntersectionPolyDataFilter.</div><div class=""><br class=""></div><div class="">Regards,</div><div class="">Richard</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 01 Apr 2015, at 16:01, Cory Quammen <<a href="mailto:cory.quammen@kitware.com" class="">cory.quammen@kitware.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><span style="font-size:12.8000001907349px" class="">There is no filter in VTK that I know of that will do this. The complaint that a vtkImageData is required is because that filter expects vtkImageData as input, and you gave it vtkPolyData - in other words, it won't work.</span><div style="font-size:12.8000001907349px" class=""><br class=""></div><div style="font-size:12.8000001907349px" class="">You might try this contribution on the VTK journal: <a href="http://www.vtkjournal.org/browse/publication/949" target="_blank" class="">http://www.vtkjournal.org/browse/publication/949</a></div><div style="font-size:12.8000001907349px" class=""><br class=""></div><div style="font-size:12.8000001907349px" class="">HTH,</div><div style="font-size:12.8000001907349px" class="">Cory</div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Wed, Apr 1, 2015 at 5:24 AM, mbcx9rb9 <span dir="ltr" class=""><<a href="mailto:richard.j.brown@live.co.uk" target="_blank" class="">richard.j.brown@live.co.uk</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br class="">

<br class="">

A very simple question I think. I'd like to produce a polygon representing<br class="">

the overlap between two overlaps (in this case a circle and a rectangle). I<br class="">

have tried vtkImageDifference and vtkIntersectionPolyDataFilter to no avail.<br class="">

<br class="">

I generated the circle using vtkRegularPolygonSource and the square with<br class="">

vtkPoints with vtkPolyon to create a vtkCellArray to create vtkPolyData.<br class="">

<br class="">

My problem, however, is when using SetInputConnection for vtkImageDifference<br class="">

or vtkIntersectionPolyDataFilter, I get the error "Input for connection<br class="">

index 0 on input port index 1 for algorithm<br class="">

vtkImageDifference(0x7ff2ea844400) is of type vtkPolyData, but a<br class="">

vtkImageData is required."<br class="">

<br class="">

Can anyone give me any pointers? It seems like such a simple task but I'm<br class="">

stumped.<br class="">

<br class="">

Regards<br class="">

<br class="">

<br class="">

<br class="">

--<br class="">

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</blockquote></div><br class=""><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div class="gmail_signature">Cory Quammen<br class="">R&D Engineer<br class="">Kitware, Inc.</div>

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