[GRASS5] New NVIZ fly navigation

[Helena Mitasova]

Massimo Cuomo wrote:
> 
> Hello everybody.
> 
> A new "immersive" navigation for NVIZ has been added by Markus to the
> CVS repository.

I just tried it out - it is great! Thank you very much for the
contribution.
I had only one problem - when I tried to read g3d file to see whether it
will work with the volume data I got an error message
id in get_drawmode is invalid.
I will try at home on a different machine, but maybe be somebody who has 
the slovakia3d data set installed could test it for volume data too.

Helena
> 
> This "fly" navigation allows to move the 3D point of view with mouse
> buttons and movements. With the new basic 3D graphic cards that are now
> usual even on laptops, it can be useful to fly not only over, but
> "inside" the DTM 3D models at high resolution. The flythrough addition
> to NVIZ allows to do so in 3 different ways that are explained directly
> on the user interface. Furthermore, navigation can be quickly switched
> between "coarse" and "fine".
> 
> For developers: a callback mechanism has been added that allows to
> register external functions and calls them at the "appropriate" moments
> in the drawing loop, after everything else has been drawn.
> 
> We at ACS (an Italian software company) are using GRASS/NVIZ for a
> research project about the desertification named RIADE (www.riade.net)
> and have developed several functions: the flythrough is the most general
> purpose of them.
> 
> I have to thank my colleagues and especially the project manager that
> trusted and allowed us to use free software for this project.
> 
> Massimo Cuomo
> 
> _______________________________________________
> grass5 mailing list
> grass5 at grass.itc.it
> http://grass.itc.it/mailman/listinfo/grass5