Hi, did you delete vtkSphereSource before that code or the sphere ? <div>Concerning fast approach, vtkPolyDataTransformFilter is not definitely good choice for fast solution of moving object - it deforms input, recompute every point manually, that normals. I do not know what 'movement' of sphere do you expect , but as it is written, you want MOVE one (same) sphere. Therefore I would combine approach that presentation emphasize - move actor ( apply continuously changed transformation but via graphic (for example OpenGl) pipeline ) and how to do this is shown on the last slide of presentation. </div>
<div><br></div><div>Jana<br><div><br></div><div><br><div class="gmail_quote">On 5 June 2012 10:30, fearhope <span dir="ltr"><<a href="mailto:fearhope@gmail.com" target="_blank">fearhope@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Thanks Jochen, Neollie and David !<br>
<br>
I deeply appreciate your help.<br>
<br>
Neollie,<br>
thanks for your correction. I was trying to find that information.<br>
<br>
Regarding method 3,<br>
Jochen, thanks for your kind explanation.<br>
however, actually I don't want to save SphereSource. I would like to keep<br>
actor only.<br>
that's the problem. it's not possible ?<br>
actor's SetPosition is really really fast. I need such speed.<br>
<br>
therefore, according to David's recommendation, I have changed the code like<br>
as follows.<br>
<div class="im"><br>
vtkSmartPointer<vtkTransformPolyDataFilter> transformFilter =<br>
vtkSmartPointer<vtkTransformPolyDataFilter>::New();<br>
<br>
</div>transformFilter->SetInputConnection(*actor->GetMapper()->GetInput()->GetProducerPort()*);<br>
transformFilter->SetTransform(transformation);<br>
transformFilter->Update();<br>
<br>
but It doesn't change anything. only I got the following error message.<br>
<br>
ERROR: In<br>
C:\Projets\PCL\installers_x86\vtk\VTK\Filtering\vtkDemandDrivenPipeline.cxx,<br>
line 802<br>
vtkStreamingDemandDrivenPipeline (290494C0): Input for connection index 0 on<br>
input port index 0 for algorithm vtkTransformPolyDataFilter(2904D4F0) is<br>
NULL, but a vtkPolyData is required.<br>
<br>
does anybody know why ?<br>
<br>
<br>
--<br>
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