-w Enable writing to script files
-z Use site category as Z value (height) when displaying
sites
Parameters
elev
Raster file for Elevation
color
Raster file(s) for Color (1 or 3 files). If three files
are given, the first will be used for the red com-
ponent, the second for the green component and the
third for the blue component. When using three files,
each file must contain values in the range 0 - 255.
vector
Vector overlay file
sites
Sites overlay file
3dview
3d viewing parameters file
script
Automatically run script file
If the user simply types SG3d without specifying parameter values on the command line, the program will prompt the user to enter these.
Before starting the program, check the resolution and dimen- sions of the current GRASS region. The current resolution will determine the best resolution available in SG3d. For speed, the entire raster file is loaded into memory, along with vertex color and other surface information needed for lighting calculations. Thus, large dimensions such as 1000 rows x 1000 columns may cause memory problems. SG3d uses 12 bytes of memory for each vertex, therefore a 1000 x 1000 image would require 12 megabytes for data alone.
The GRASS text window is used by SG3d to issue prompts and warnings and to input filenames. Therefore, after starting the program, place the GRASS text window where it can be seen and typed into.
Any sliders and dials used in the control panels have a FINE ADJUSTMENT: Hold down the Ctrl key while manipulating the dial or slider for fine control.
Full documentation detailing the action associated with each control is available in the tutorial.
Last changed: $Date: 2002/01/25 05:45:32 $