R help - Nov 2005 - problem with grid animation

I'm trying to do animation with grid. Basically it's a vector field,
like what 'quiver'
in Matlab creates. I need to update it with grid.edit(). It seems grid erases
the
whole thing first, then redraws. Therefore the evident 'flash' between
frames.

Any way to avoid this flash? Thanks.

Hi


Zepu Zhang wrote:
> I'm trying to do animation with grid. Basically it's a vector
field, like what 'quiver'
> in Matlab creates. I need to update it with grid.edit(). It seems grid
erases the
> whole thing first, then redraws. Therefore the evident 'flash'
between frames.

Correct.

> Any way to avoid this flash? Thanks.

There are a couple of ways, but unfortunately they may not be to your 
taste ...

1)  Use windows (where double-buffering has been implemented)
2)  Find some way to convince someone to modify the X11 device (or 
whichever device you are using) to support double-buffering
3)  Provide a patch for the X11 device yourself ...

Paul
-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul at stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/