Wayback in the 1990s, Vaughn Cato and I were corresponding, and somehow some topics came up about rendering a 3-D maze on the CoCo.

Vaughn wrote a demo which was called toast for reasons I no longer remember. It parsed a text file representing the maze, and would let you “walk” through it using the arrow keys. The code was written in C (though there may be some assembly helper routines in there, I haven’t checked) for the Radio Shack Color Computer 3 under the OS-9 operating system.

Here is a quick demo of what toast looked like:

Here is the maze data file:

18 16
#  ##########
#           #
#           #
########### #
          # #
          # #
          # #
          # #
          # #
          # #
      ##### ######
      #          #
      #          #
      #          #
      #          #
      ############

The readme included with this version had the following notes:

Here is the latest version of the maze program.  I think that it now
always displays the walls correctly, but let me know if you find a problem.

I have also included a demo of the bitmap scaling routine.  Just run
mapgraph to try it out.

  Until Later,
  Vaughn Cato ([deleted]@st6000.sct.edu)

I will share what mapgraph does in a future post ;-)

I plan to reach out to Vaughn and ask if he would be okay with sharing the source code for this.

Until then…