[GRASS-dev] Re: [GRASS GIS] #31: NVIZ issues in GRASS6.x

[Michael Barton]

On Dec 31, 2008, at 6:30 AM, GRASS GIS wrote:

> #31: NVIZ  issues in GRASS6.x
> -------------------------- 
> +-------------------------------------------------
>  Reporter:  clerici      |       Owner:  grass-dev at lists.osgeo.org
>      Type:  defect       |      Status:  new
>  Priority:  major        |   Milestone:  6.4.0
> Component:  NVIZ         |     Version:  svn-develbranch6
> Resolution:               |    Keywords:  nviz
>  Platform:  Unspecified  |         Cpu:  Unspecified
> -------------------------- 
> +-------------------------------------------------
> Changes (by marisn):
>
>  * version:  6.2.3 => svn-develbranch6
>
> Comment:
>
> Seems like minor issues are fixed. Left over issues are complex ones  
> and
> may be related to C bugs or improper C/TCL interaction. [[BR]]
> Steps to reproduce 5:
>
>
> nviz elevation=elevation.dem at PERMANENT [[BR]]
> Add new raster surface as constant ("New constant"->enter value 3000),
> uncheck "use as color"[[BR]]
> Click "DRAW CURRENT" -> new gray surface is displayed on top of
> elevation.dem surface (OK)[[BR]]
> Change new constant surface transparency, set it to constant (i.e.
> 30)[[BR]]
> Click "DRAW CURRENT" once -> new surface gets transparent (OK)[[BR]]
> Click "DRAW CURRENT" for second time -> new surface is not transparent
> anymore (BUG)[[BR]]
> Click "CLEAR" and then "DRAW" -> new surface is displayed below
> elevation.dem (BUG)[[BR]]
> Click "CLEAR" and then "DRAW CURRENT" -> only new raster surface is
> displayed. elevation.dem is missing (WTF?)[[BR]]
> Change view and then click "DRAW CURRENT" -> new surface is  
> transparent
> and on top of elevation.dem(OK)
>
> -- 

The DRAW CURRENT button calls "Nsurf_draw_one". I think this is a call  
to the C part of NVIZ. I wish there was some kind of description of  
which commands are actually useable and what their syntax is.

Michael