fixed point vs fixed decimal
hancock at anansispaceworks.com
Wed Jan 8 02:41:35 CET 2003
John Roth wrote:
> You're right! I'd forgotten about the applications in graphics and
> motor control where floats are too expensive.
They are also a convenient natural representation for angles -- if you
allow a fixed size, unsigned integer to overflow without error, and map the
range of the integer to a full circle, then its behavior is exactly correct
for the task and does not require special edge-case handling.
I saw this trick in a graphics programming book years ago.
They can also be handy in graphics acceleration tasks (but in C, obviously).
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