Even though the Amiga chipsets have no real hardware support for rotating BOBs, you can trick the Blitter's line function into doing exactly that:
- calculate the start and end coordinates for the BOBs first scanline
- set the BOB's graphic data as line pattern(!) and draw a line from start to end coordinate
- repeat with 2nd line, and so on
- coordinate offsets can be precalculated for various rotation angles
Probably not very fast on a fast system (wastes lots of chipset bandwidth), but a better-than-software solution on basic 68000 systems.
:-)
