ATAN2 and HYPOT functions for ints...

[Eychaner, Glenn C.]

Ok, so here's my problem.
I am dividing two 512x512 arrays of unsigned char into 8x8 boxes, summing over
the boxes, and then shoving the results from the two arrays through atan2() 
and hypot().  The problem is: these function are awfully slow, as I have to
convert int (the result of the summing) to float, and then convert the result
back to int (unsigned char, actually).  Anyone got a faster way to do this?
No, LUTs, BTW, the "summing" has some added complications I won't mention which
increases the range of the numbers involved...
In other words, anyone got a hypot() or atan2() function which take and return
int?  (Note: atan2 should return a number in degrees if it returns int...)
                                                      Just wondering...
                                                      Glenn
Glenn Eychaner   |Eychaner at SunCub.Caltech.edu |Remember: It is easier to ride a
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