I just saw what I wrote...in second and fourth paragraph, I mean *perspective*, not parallel projection...
Milos On Fri, Sep 24, 2010 at 11:47 AM, Milos Ilak <i...@mech.kth.se> wrote: > Hi, > > I would like to be able to zoom during an animation using perspective > projection. I am doing everything via a Python script. For parallel > projection, the transformation is simple and one zooms just by changing a > constant factor, i.e., setting the CameraParallelScale variable, and the > camera doesn't 'move'. > > In parallel projection, however, one needs to change the actual camera > position and the transformation is not that simple. Looking at the Python > trace after zooming with the middle button, ParaView just reports the new > camera position, but not how it was calculated. > > Looking at vtk documentation, there is a class called vtkCamera, which can > be zoomed simply, just using vtkCamera.Zoom(float), which supposedly zooms > properly both in parallel and perspective projections, at least according to > the documentation. What I can't figure out is how to call a renderer using > the vtk module and create the vtkCamera for that renderer, i.e., there would > be a RenderView object V of some sort, and we would just set > > V.vtkCamera.Zoom(float) > > However, there is no vtkRenderView or vtkView within the vtk Python classes > provided by the module that comes with ParaView. Would someone be able to > tell me what GetRenderView() in paraview acually calls? Or if I am headed in > the wrong direction, how should this be done properly? I hope I don't have > to code up all the transformations by hand to obtain the new camera position > for parallel projection...Thanks, > > Milos > > > -- > Miloš Ilak > Linné Flow Centre > KTH Mechanics, Stockholm > +46(0) 8 790-7152 > www2.mech.kth.se/~ilak <http://www2.mech.kth.se/%7Eilak/> > > > -- Miloš Ilak Linné Flow Centre KTH Mechanics, Stockholm +46(0) 8 790-7152 www2.mech.kth.se/~ilak <http://www2.mech.kth.se/%7Eilak/>
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
