[vtkusers] Re: Dataset Animation in VTK

[Craig N. Scott]

I wanted to do something similar a little while ago in Tcl. My approach
was a bit different to your suggestion. A simplified version of the
pipeline looks something like this:

vtkPolyDataReader
  |
  v
vtkPolyDataMapper
  |
  v
vtkActor

I achieved animation by creating a vtkPolyDataReader for each file and
then changing which one the vtkPolyDataMapper used for a source (ie
calls to vtkPolyDataMapper::SetInput).

This had the advantage that each file only needed to be read in once,
then if I wanted to reshow the animation it would be much faster because
the data was retained in memory. Of course, if your models are large or
you have a lot of frames, you'd probably want to get Vtk to discard the
data not being shown.


On Fri, 2003-02-07 at 05:19, vtkusers-request at public.kitware.com wrote:
> Date: Thu, 06 Feb 2003 14:41:53 -0200
> From: Lucas Peetz Dulley <dulley at lsi.usp.br>
> To: vtkusers at public.kitware.com
> Subject: [vtkusers] Dataset Animation in VTK
> 
> Hi everyone!
> 
> I have some meteorological datasets (GRIB files) and the data ( like 
> temperature, humidity, pressure etc ) is collected in a daily/hourly basis.
> 
> I've been able to display the data as Volumes, Isosurfaces, vectorfields 
> and Slices.
> 
> But then someone asked me: "How about animating these datasets through 
> time?" ... I said : "what the hell, lets do it! :)"
> 
> The only way I could think of is doing several AddProp / RemoveProp in 
> sequence, swapping one dataset (at time T) by the other one (at time 2T).
> 
> Does anyone have any other suggestions/solutions for this matter? I 
> really would appreciate it :)
> 
> Thanks in advance,
> 
> Lucas
> 
> -- 
> Lucas Peetz Dulley   <dulley at lsi.usp.br>
> Virtual Reality Center - CAVERNA Digital
> LSI - POLI - USP   Tel: +55-11-3091-5374
> Av. Prof. Luciano Gualberto, 158 trav. 3
> CEP: 05508-900 - Sao Paulo - SP - Brazil 

-- 
Dr Craig Scott, CSIRO (CMIS)
Melbourne, Australia