🚀 go-pugleaf

I don't know if Josh mentioned this on his explanation of real-time
perspective mapping [scaling/rotation] but the way to get speed is
to store the image to be scaled in a format where each pixel
is a byte.  An 80x80 pixel bitmap is simply a 6400 byte 2 dimensional
array.  As your scanning algorithm scans the array and stores each pixel
it is stored as another table where you then convert back to interleaved
for screen memory.  I hear that PC VGA stores each pixel as a byte,
anyway, so this might be necessary only on Atari ST or Amiga [advantages
outweigh for the latter two].

I think I posted about texture mapping about a year ago in alt.sys.amiga.demos
or comp.sys.amiga.programmer.

STratoHAK/TPPi