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<body class='hmmessage'><div dir='ltr'>Dear Cory,<div><br></div><div>Thanks for the help. Now it is working! The only thing is that the origin needs to be transformed as well.</div><div><br></div><div>Cheers,</div><div><br></div><div>Qiang<br><br><div><hr id="stopSpelling">Date: Tue, 5 Jan 2016 10:28:33 -0500<br>Subject: Re: [vtkusers] Transform a clipping plane<br>From: cory.quammen@kitware.com<br>To: wangq1979@outlook.com<br>CC: vtkusers@vtk.org<br><br><div dir="ltr">Chiang,<div><br></div><div>The transform is applied to points at which the plane function is evaluated, but it is not considered when setting up clipping planes in the mapper.</div><div><br></div><div>You should be able to get the same effect from your rotations by applying the transform to a point representing the tip of the plane normal.</div><div><br></div><div>double normal[] = {0, 1, 0};</div><div>double rotatedNormal[3];</div><div>transPlane->TransformPoint(normal, rotatedNormal);</div><div>plane->SetNormal(rotatedNormal);</div><div><br></div><div>HTH,</div><div>Cory</div><div><br></div></div><div class="ecxgmail_extra"><br><div class="ecxgmail_quote">On Tue, Jan 5, 2016 at 7:32 AM, WangQ <span dir="ltr"><<a href="mailto:wangq1979@outlook.com" target="_blank">wangq1979@outlook.com</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;">
<div><div dir="ltr">Hello vtkusers,<div><br></div><div>I used vtkplane to clip a volume. Everything is find until the volume is transformed. The plane is still at the original position. I then applied vtkTransform to the plane, but the plane is still the same place. The code snippet is as below:</div><div><br></div><div><div> vtkSmartPointer<vtkPlane> plane =</div><div> vtkSmartPointer<vtkPlane>::New();</div><div> plane->SetOrigin(0, tomo2DDims / 2, 0);</div><div> plane->SetNormal(0, 1, 0);</div><div> vtkSmartPointer<vtkTransform> transPlane = vtkSmartPointer<vtkTransform>::New();</div><div> transPlane->RotateY(90);</div><div> transPlane->RotateZ(90);</div><div> transPlane->RotateX(55);</div><div> transPlane->RotateY(3);</div><div> plane->SetTransform(transPlane);</div><div><br></div><div> cutVolumeMapper->AddClippingPlane(plane);</div></div><div><br></div><div><br></div><div>Appreciate your help in advance!</div><div><br></div><div>cheers,</div><div><br></div><div>Chiang</div> </div></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="ecxgmail_signature">Cory Quammen<br>R&D Engineer<br>Kitware, Inc.</div>
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