FQuat Class Reference

Public Member Functions
	FQuat (float qx, float qy, float qz, float qw)
	FQuat (const FQuat &q)
	FQuat (const FPoint3 &axis, float angle)
void	Init ()
void	Set (float qx, float qy, float qz, float qw)
void	SetFromMatrix (const FMatrix3 &matrix)
void	SetFromVectors (const FPoint3 &forward, const FPoint3 &up)
void	SetFromVector (const FPoint3 &direction)
void	AxisAngle (const FPoint3 &axis, float angle)
void	GetMatrix (FMatrix3 &matrix) const
void	Slerp (const FQuat &from, const FQuat &to, double f)
float	LengthSquared () const
const FQuat	Inverse () const
void	Invert ()
const FQuat	operator* (const FQuat &q) const
FQuat &	operator*= (const FQuat &q)
const FQuat	operator/ (const FQuat &q) const
FQuat &	operator/= (const FQuat &q)
FQuat &	operator= (const FQuat &q)

Public Attributes
float	x
float	y
float	z
float	w

Detailed Description

Single-precision quaternion class. Quaternions are very useful for efficiently representing an orientations/rotation and operations such as interpolating between orientations.

Member Function Documentation

void FQuat::GetMatrix

(

FMatrix3 &

mat

)

const

Get the equivalent matrix for this quaternion.

void FQuat::SetFromMatrix

(

const FMatrix3 &

mat

)

Set quaternion to be equivalent to specified matrix.

void FQuat::Slerp	(	const FQuat &	from,
		const FQuat &	to,
		double	f
	)

Spherical Linear Interpolation. As f goes from 0 to 1, the quaternion goes from "from" to "to".

Reference: Shoemake at SIGGRAPH 89, See also: http://www.gamasutra.com/features/19980703/quaternions_01.htm