Ben Katz / Hobbyking_Cheetah_general

auto-measurements

Dependencies:   FastPWM3 mbed-dev

Fork of Hobbyking_Cheetah_Compact by Ben Katz

FastMath/FastMath.cpp@0:4e1c4df6aabd, 2016-02-05 (annotated)

Committer:
benkatz
Date:
Fri Feb 05 00:52:53 2016 +0000
Revision:
0:4e1c4df6aabd
Child:
20:bf9ea5125d52
It works!

Who changed what in which revision?

UserRevisionLine numberNew contents of line
benkatz 0:4e1c4df6aabd 1 #include "FastMath.h"
benkatz 0:4e1c4df6aabd 2 #include "LUT.h"
benkatz 0:4e1c4df6aabd 3
benkatz 0:4e1c4df6aabd 4 const float Multiplier = 81.4873308631f;
benkatz 0:4e1c4df6aabd 5
benkatz 0:4e1c4df6aabd 6 float FastMath::FastSin(float theta){
benkatz 0:4e1c4df6aabd 7 if (theta < 0.0f) theta += 6.28318530718f;
benkatz 0:4e1c4df6aabd 8 if (theta >= 6.28318530718f) theta -= 6.28318530718f;
benkatz 0:4e1c4df6aabd 9 return SinTable[(int) (Multiplier*theta)] ;
benkatz 0:4e1c4df6aabd 10 }
benkatz 0:4e1c4df6aabd 11
benkatz 0:4e1c4df6aabd 12 float FastMath::FastCos(float theta){
benkatz 0:4e1c4df6aabd 13 return FastSin(1.57079632679f - theta);
benkatz 0:4e1c4df6aabd 14 }