DOS VGA 3D Code

Hastily put together, rudimentary sample code for 3D drawing, VGA 320x200, 256 color mode 13h. No clipping or occlusion implemented. All rendered with Bresenham lines. 16-bit Real Mode x86, 186 instruction set required as-is, utilizing Fixed-Point math. Admittedly, this code might be quite a kludge to decipher, and includes some questionable coding choices.

Includes 1 C source file, a BAT with compiler settings set thru the 16-bit Watcom Compiler-Linker, and the compiled OBJ and EXE file.

Program Controls (as is when downloaded):

• W - Forward
• S - Back
• A - Left
• D - Right
• ESC - Quit Program

To be compiled in OpenWatcom C 1.9. Feel free to use this code as you see fit, but use at your own risk.

References Used:

• HelpPC
• David Brackeen's VGA Tutorial
• Tricks of the Game Programming Gurus (Book)
• Bresenham's line algorithm
• The OpenWatcom C 1.9 documentation (Included with the OW1.9 install.)