Re: [GRASS-dev] wxNviz volumes

[Anna Kratochvílová]

Hello,

> Martin's fix allowed me to get wxNviz going and try it out. Your summer work has
> make great improvements in getting this to the level of functionality of the old
> tcltk nviz. The view controls work very well and the map updates automatically.
> The data controls work well too and alter the image as indicated. The lighting
> works really well too and I'm glad to see the cutting plane and fringe
> functional. This is all very much appreciated. I have a few observations and
> suggestions from going through and testing. 
> 
> 1. Position controls. Works fine. But this seems to make more sense on the view
> page as it affects the orientation of the map display rather than the color or
> character of the image itself (other things on the data page). 

On data page there are things relating to one chosen map, so that's the reason why position is there.
But I agree it should be improved. I thought about some interactive positioning, I'm not sure how this could be done
but I'll try something.

> 2. Z-exag. Works fine. It would be nice if this could be a float with at least 1
> decimal so that z-exag. of 1.5 or 2.5 could be set. Not a high priority though.

This shouldn't be problem.

> 3. Cutting plane. Most works fine. But the x and y sliders seem to do the same
> thing. Height doesn't seem to have any affect. Tilt make visual cutting planes
> disappear (same thing with TclTk). 

x, y mean the rotation center, you can see it when you use rotation. Height 
has effect only when using tilt. I know about the disappearing of the shading with tilt
but I'm not sure if I can do anything about it.

> 4. Fringe. All works well except the 'elevation from bottom' command. It doesn't
> seem to do anything.

It works for me. Maybe it's another Mac problem.

Thanks for testing, it's welcomed.

Best regards
Anna