Just getting started now but is ugly to look at.

Please supply me with physical dimensions X x Y x Z (in quants) of your
two models and the width X height of bluspark.bmp.

Thay way I dont need to fiddle scale_xyz.

Thanks

[edit] Im going to do a trimmed down one first as this is very hard
trying to keep your struct implementations intact.
I'll give the same behaviours but using a single frame-by-frame
hunk of code in main, rather than lots of OOP functions, as I promised.