approximations.h File Reference

Math approximations file. More...

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Functions
float	fasin_deg (float x)
float	facos_deg (float x)
float	fatan_deg (float x)
float	fatan2_deg (float y, float x)
float	fatan_15deg (float x)

Detailed Description

Math approximations file.

Significant efficiencies were found by creating a set of trig functions which trade off precision for improved power/CPU performance. Full details are included in Application Note AN5015: Trigonometry Approximations

Definition in file approximations.h.

Function Documentation

facos_deg()

float facos_deg

(

float

x

)

Definition at line 43 of file approximations.c.

References fatan_deg().

Referenced by fAndroidAnglesDegFromRotationMatrix(), fNEDAnglesDegFromRotationMatrix(), and fWin8AnglesDegFromRotationMatrix().

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fasin_deg()

float fasin_deg

(

float

x

)

Definition at line 28 of file approximations.c.

References fatan_deg().

Referenced by fAndroidAnglesDegFromRotationMatrix(), feCompassAndroid(), feCompassNED(), feCompassWin8(), fNEDAnglesDegFromRotationMatrix(), and fWin8AnglesDegFromRotationMatrix().

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fatan2_deg()

float fatan2_deg	(	float	y,
		float	x
	)

Definition at line 109 of file approximations.c.

References fatan_deg().

Referenced by fAndroidAnglesDegFromRotationMatrix(), fNEDAnglesDegFromRotationMatrix(), and fWin8AnglesDegFromRotationMatrix().

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fatan_15deg()

float fatan_15deg

(

float

x

)

Definition at line 139 of file approximations.c.

References PADE_A, PADE_B, and PADE_C.

Referenced by fatan_deg().

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fatan_deg()

float fatan_deg

(

float

x

)

Definition at line 59 of file approximations.c.

References fatan_15deg(), TAN15DEG, and TAN30DEG.

Referenced by facos_deg(), fasin_deg(), fatan2_deg(), and fWin8AnglesDegFromRotationMatrix().

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