<font><font face="verdana,sans-serif">First of all, doing 3 transformations on a polydata like that is inefficient. Try this:</font></font><div><font face="verdana, sans-serif"><br></font></div><div><div style>vtkSmartPointer<vtkTransform> ntrans = vtkSmartPointer<vtkTransform>::New();</div>
<div style>ntrans->Translate(np);</div><div><span style>ntrans->RotateZ(rot_</span><span style>angle);</span></div><div><font><span style>ntrans->Translate(pp);</span></font></div><div><font><font color="#222222" face="arial, sans-serif">//perhaps do this in reverse order (or turn on postMultiply</font><span style>)</span></font></div>
<div><font><font color="#222222" face="arial, sans-serif">//also take a look at matrix returned by ntrans->GetMatrix(), it is helpful for debugging<br></font></font><br><div style>vtkSmartPointer<vtkTransformPolyDataFilter> nTranslateFilter = </div>
<div style> vtkSmartPointer<vtkTransformPolyDataFilter>::New();</div><div style>nTranslateFilter->SetInput( polyData ); // polyData is an object of type vtkPolyData</div><div style>nTranslateFilter->SetTransform(ntrans);</div>
<div style>nTranslateFilter->Update();</div><div><br></div><div><div style>vtkSmartPointer<vtkPolyDataMapper> pdmapper = vtkSmartPointer<vtkPolyDataMapper>::New();</div><div style>pdmapper->SetInputConnection(nTranslateFilter->GetOutputPort() );</div>
<div style>pdmapper->ScalarVisibilityOff();</div><div style><br></div><div style>vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();</div><div style>actor->SetMapper(pdmapper);</div></div>
<br><div class="gmail_quote">On Thu, Mar 15, 2012 at 04:31, rakesh patil <span dir="ltr"><<a href="mailto:prakeshofficial@gmail.com">prakeshofficial@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello,<div><br></div><div>I am using this particular code to perform the following set of transformations</div><div><br></div><div>Translate -> Rotate -> Translate</div><div><br></div><div>vtkSmartPointer<vtkTransform> ntrans = vtkSmartPointer<vtkTransform>::New();</div>
<div>ntrans->Translate(np);</div><div><br></div><div>vtkSmartPointer<vtkTransform> ptrans = vtkSmartPointer<vtkTransform>::New();</div><div>ptrans->Translate(pp);</div><div><br></div><div><div>vtkSmartPointer<vtkTransform> rotateTrans = vtkSmartPointer<vtkTransform>::New();</div>
<div>rotateTrans->RotateZ(rot_angle);</div><br></div><div>vtkSmartPointer<vtkTransformPolyDataFilter> nTranslateFilter = </div><div> vtkSmartPointer<vtkTransformPolyDataFilter>::New();</div>
<div>nTranslateFilter->SetInput( polyData ); // polyData is an object of type vtkPolyData</div><div>nTranslateFilter->SetTransform(ntrans);</div><div>nTranslateFilter->Update();</div><div><br></div><div><div>vtkSmartPointer<vtkTransformPolyDataFilter> rotateFilter = </div>
<div> vtkSmartPointer<vtkTransformPolyDataFilter>::New();</div><div>rotateFilter->SetInputConnection( nTranslateFilter->GetOutputPort() );</div><div>rotateFilter->SetTransform(rotateTrans);</div><div>
rotateFilter->Update();</div></div><div><br></div><div><div>vtkSmartPointer<vtkTransformPolyDataFilter> pTranslateFilter = </div><div> vtkSmartPointer<vtkTransformPolyDataFilter>::New();</div><div>pTranslateFilter->SetInputConnection( rotateFilter->GetOutputPort() );</div>
<div>pTranslateFilter->SetTransform(ptrans);</div><div>pTranslateFilter->Update();</div></div><div><br></div><div>vtkSmartPointer<vtkPolyDataMapper> pdmapper = vtkSmartPointer<vtkPolyDataMapper>::New();</div>
<div>pdmapper->SetInputConnection(pTranslateFilter->GetOutputPort() );</div><div>pdmapper->ScalarVisibilityOff();</div><div><br></div><div>vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();</div>
<div>actor->SetMapper(pdmapper);</div><div><br></div><div><br></div><div>With this code, I can see that the transformation is done only till rotation. Next translation is not shown. Can anyone point out where I am going wrong? </div>
<div><br></div><div>Thanks in advance</div><div><br></div><div>Regards</div><span class="HOEnZb"><font color="#888888"><div>Rakesh Patil</div><div><br></div>
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