Trigonometry

Fixed-point trigonometry helpers. More...

Macros
#define	TRIG_PI   0x8000
	Angle value that corresponds to 180 degrees or PI radians.
#define	TRIG_FP   16
	Number of fractional bits of the fixed-point ratio used by atan2_lookup().

Functions
uint32_t	normalize_angle (int32_t angle)
	Normalize an angle to the range [0, TRIG_MAX_ANGLE].

Detailed Description

Fixed-point trigonometry helpers.

Angles are scaled so that TRIG_MAX_ANGLE is a full turn. Entities shared with the app SDK are documented in the SDK's Math group.

Macro Definition Documentation

TRIG_FP

#define TRIG_FP   16

Number of fractional bits of the fixed-point ratio used by atan2_lookup().

TRIG_PI

#define TRIG_PI   0x8000

Angle value that corresponds to 180 degrees or PI radians.

See also

sin_lookup

cos_lookup

Function Documentation

normalize_angle()

uint32_t normalize_angle

(

int32_t

angle

)

Normalize an angle to the range [0, TRIG_MAX_ANGLE].

Parameters

angle

Angle, scaled so that TRIG_MAX_ANGLE is a full turn; may be negative.

Returns

Equivalent angle; TRIG_MAX_ANGLE only for negative multiples of a full turn.