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- The openGL gsurf library (ogsf), consisting of approximately 20,000 lines
- of C code, contains some 180 public functions and about twice as many
- internal functions for run-time data storage, manipulation, querying,
- and visualization using OpenGL.
- The library handles all drawing and lighting operations, including use of
- user-defined clipping planes and drawing various style "fences" on clipping
- planes when drawing multiple surfaces, and treats datasets as objects which
- can be used for various attributes of the rendering. It allows data
- sharing (e.g., same data for more than one attribute of same or different
- surfaces), separate masking for each surface, multiple surfaces, vector sets,
- or point sets, and will also allow multiple volumes. The library provides
- all query features such as 3D "point on surface", keyframe animation routines,
- and full state saving functionality. Database-specific routines for
- interfacing with the GRASS GISlib are kept isolated for easier library reuse
- with other databases. The gsurf library is not dependent upon any particular
- interface library, and has been used successfully with both Motif and Tcl/Tk.
- It is used for NVIZ visualization tool.
- moved from src.contrib/GMSL/NVIZ2.2/lobes/ogsf/
- to src/libes/ogsf/
- Updated src.contrib/GMSL/NVIZ2.2/Gmakefile for that.
- 10/1999 Markus Neteler
- 10/99 - changed gsd_img.c to uncompressed IRIS RGB
- 2/26/96 - some minor cleanup (mca)
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