fp_math.c File Reference

Functions
void	fastNormVec (q24_8 *xp, q24_8 *yp)
	Quickly normalize a q24_8 vector, in-place.
vec_q24_8	fpvNorm (vec_q24_8 vec)
	Normalize and return a vector.
q24_8	fpvDot (vec_q24_8 a, vec_q24_8 b)
	Compute the dot product of two vectors.
q24_8	fpvSqMag (vec_q24_8 a)
	Compute the squared magnitude of a vector.
vec_q24_8	fpvAdd (vec_q24_8 a, vec_q24_8 b)
	Add two vectors.
vec_q24_8	fpvSub (vec_q24_8 a, vec_q24_8 b)
	Subtract two vectors.
vec_q24_8	fpvMulSc (vec_q24_8 vec, q24_8 scalar)
	Multiply a vector by a scalar.
vec_q24_8	fpvDivSc (vec_q24_8 vec, q24_8 scalar)
	Divide a vector by a scalar.
float	fixToFloat (q24_8 fx)
	Convert a q24_8 to floating point.

Function Documentation

fastNormVec()

void fastNormVec	(	q24_8 *	xp,
		q24_8 *	yp )

Quickly normalize a q24_8 vector, in-place.

Parameters

xp	The X component of the vector, normalized in-place
yp	The Y component of the vector, normalized in-place

fpvNorm()

vec_q24_8 fpvNorm

(

vec_q24_8

vec

)

Normalize and return a vector.

Parameters

vec	The vector to normalize

Returns

The normalized vector

fpvDot()

q24_8 fpvDot	(	vec_q24_8	a,
		vec_q24_8	b )

Compute the dot product of two vectors.

Parameters

a	A vector to dot
b	The other vector to dot

Returns

The dot product of the two vectors

fpvSqMag()

q24_8 fpvSqMag

(

vec_q24_8

a

)

Compute the squared magnitude of a vector.

Parameters

a	The vector to compute the squared magnitude of

Returns

The squared magnitude of the vector

fpvAdd()

vec_q24_8 fpvAdd	(	vec_q24_8	a,
		vec_q24_8	b )

Add two vectors.

Parameters

a	A vector to add
b	The other vector to add

Returns

The sum of the two input vectors

fpvSub()

vec_q24_8 fpvSub	(	vec_q24_8	a,
		vec_q24_8	b )

Subtract two vectors.

Parameters

a	A vector to subtract from
b	The other vector to subtract

Returns

The difference between the two input vectors

fpvMulSc()

vec_q24_8 fpvMulSc	(	vec_q24_8	vec,
		q24_8	scalar )

Multiply a vector by a scalar.

Parameters

vec	A vector multiply
scalar	A scalar to multiply the vector by

Returns

The scaled vector

fpvDivSc()

vec_q24_8 fpvDivSc	(	vec_q24_8	vec,
		q24_8	scalar )

Divide a vector by a scalar.

Parameters

vec	A vector divide
scalar	A scalar to divide the vector by

Returns

The scaled vector

fixToFloat()

float fixToFloat

(

q24_8

fx

)

Convert a q24_8 to floating point.

Parameters

fx	Fixed point input

Returns

Floating point output