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List:       vtk-developers
Subject:    [vtk-developers] Visual Studio CLR makes VTK really slow ...
From:       Frederic DANESI <frederic.danesi () dinccs ! com>
Date:       2011-02-22 18:54:14
Message-ID: AANLkTik+ytPPVg-7jEUAj33-3FDjcOrYvzeNgzHK2E0f () mail ! gmail ! com
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Hi,

We came accross something weird when using Visual Studio CLR.

We have created a very simple VTK pipeline (load a STL file => render =>
move the camera around while taking screen shots).
Those operation are integrated in a vtkPanel, build as a C++ DLL.

When using this DLL in a console application (with the VTK default
RenderWindow), we get a framerate of 100 fps.
When using this DLL in a winform application (Visual Studio 6,MFC, no CLR),
we get the same framerate.

When using this DLL in a .Net Windows Form (Visual Studio 10, CLR) we get a
framerate of 26 fps, which is not acceptable.
(Obvisously, if we use directly the VTK classes inside the CLR project
without building a library, the framerate is even worse : 6 fps).

Does anyone have knowledge about using VTK inside a CLR application without
such a loss of performance ? Are we missing something ?

Thanks,
Fred.

[Attachment #5 (text/html)]

Hi,<div><br></div><div>We came accross something weird when using Visual Studio \
CLR.</div><div><br></div><div>We have created a very simple VTK pipeline (load a STL \
file =&gt; render =&gt; move the camera around while taking screen shots).</div>

<div>Those operation are integrated in a vtkPanel, build as a C++ \
DLL.</div><div><br></div><div>When using this DLL in a console application (with the \
VTK default RenderWindow), we get a framerate of 100 fps.</div><div>When using this \
DLL in a winform application (Visual Studio 6,MFC, no CLR), we get the same \
framerate.</div>

<div><br></div><div>When using this DLL in a .Net Windows Form (Visual Studio 10, \
CLR) we get a framerate of 26 fps, which is not acceptable.</div><div>(Obvisously, if \
we use directly the VTK classes inside the CLR project without building a library, \
the framerate is even worse : 6 fps).</div>

<div><br></div><div><div>Does anyone have knowledge about using VTK inside a CLR \
application without such a loss of performance ? Are we missing something \
?</div><div><br></div><div>Thanks,</div><div>Fred.</div><div><br> </div>
<br>
</div>



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