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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal">I’m trying to understand how to create a left-handed coordinate system view with +z axis into the screen,<o:p></o:p></p>
<p class="MsoNormal">+y axis up and + x axis to the right and also have the lighting update appropriately.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">One thing I’ve been wrestling with is accessing the underlying ModelViewMatrix (in OpenGL glMatrixMode(GL_MODELVIEW).<o:p></o:p></p>
<p class="MsoNormal">I thought I could set the ModelViewMatrix directly somehow but couldn’t find what I needed .<o:p></o:p></p>
<p class="MsoNormal">I then saw that vtkCamera has a ModelViewMatrix but I’m am unable to set it properly. Seems that you can set<o:p></o:p></p>
<p class="MsoNormal">parts of the matrix and then the remainder is built assuming “right handedness”, I think.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The closest I’ve gotten is by setting the ModelTransform (note, not ModelViewTransform!) which in I believe<o:p></o:p></p>
<p class="MsoNormal">is simply applying the transform to the data. This however mucks up the lighting and various combinations of<o:p></o:p></p>
<p class="MsoNormal">vtkReverseSense and vtkPolyDataNormal settings didn’t seem to make a difference. Lighting wasn’t correct, ie dark surfaces,<o:p></o:p></p>
<p class="MsoNormal">backside culled etc.<o:p></o:p></p>
<p class="MsoNormal">Any examples out there of how to setup a left handed coordinate system view?<o:p></o:p></p>
<p class="MsoNormal">Thanks for any insight here.<o:p></o:p></p>
<p class="MsoNormal">Gerrick<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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