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- June 4, 1989
-
-
- Charles:
-
-
- Here is some basic documentation for the VS3D.TTP program.
-
-
- VS3D.TTP is a program designed to convert 3D object files between
- the Aegis Videoscape-3D file format and the Antic CAD-3D 2.0 file
- format. The program converts either file format to the other
- format.
-
- The program runs on the Atari ST computers. To use, double click
- on the program's icon from the desktop, and a parameters entry
- screen will appear. Enter the filename of the file(s) you wish
- to convert, including drive and path if the file is in a different
- directory than the current one. Wildcards are valid, but the
- extension MUST be either .GEO or .3D2. For example, to convert all
- of the .GEO files on drive B: to .3D2 format , enter:
- b:\*.GEO
- No wildcards are allowed in the drive or path names.
- The program can also be run from a command-line environment. Start
- the program by typing:
- VS3D <filename>
- where filename is the fully pathed file spec as above.
-
-
- The program uses the extension you supply as the basis for the
- conversion. If you entered .GEO, it converts from videoscape format
- to CAD-3D format. If you enter .3D2, it converts from CAD-3D to
- videoscape format. The converted file is written to the current drive
- and directory.
-
- Some notes and limitations:
-
- There is no limit to the number of objects, vertices, or faces that
- can be in a file to be converted. However, since CAD-3D and
- Videoscape both have object count and complexity limitations, you
- must be sure that your converted object does not exceed that program's
- limits.
-
- The converter will only convert .GEO files from Videoscape that contain
- 3 or 4 vertice polygons - no more complex polygons are supported. This
- can be easily overcome if you have an object with complex polygons by
- using interchange to convert the object to Sculpt-3D or Turbo Silver
- format (which only use triangles), then convert that converted file
- back to videoscape format. This has the additional advantage of
- converting videoscape's "surface details" to polygons for easier
- loading into CAD-3D. Alternatively, the .GEO files can be loaded
- into Modeler-3D to be modified. Simply select all polygons with
- more than 4 vertices, and use the subdivide command to break the
- polygons down into simpler polygons.
-
- Color palette conversion for CAD-3D to Videoscape files is done on
- the assumption that all surfaces will be matte finish. Since this
- limits the colors to 16 (really only 12), some of the colors may not
- match "exactly", as there is not as great a range of color for
- Videoscape objects as in CAD-3D.
-
- Please let me know if you find any bugs or problems with the program,
- or if there are any enhancements you would like done.
-
- Paul LeFevre
-
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