Quaternion

class HPS::Quaternion

Public Functions

inline bool Equals(Quaternion const &q, int in_tolerance = HPS::Float::default_tolerance) const

inline Quaternion Exp() const

inline Quaternion Lerp(Quaternion const &in_right, float in_fraction) const

inline Quaternion Log() const

inline float Norm() const

inline Quaternion const &Normalize()

inline bool operator!=(Quaternion const &q) const

inline Quaternion operator*(float in_right) const

inline Quaternion operator*(Quaternion const &in_right) const

inline Quaternion operator+(Quaternion const &in_right) const

inline Quaternion operator-(Quaternion const &in_right) const

inline Quaternion operator/(float in_right) const

inline bool operator==(Quaternion const &q) const

inline Quaternion()

inline Quaternion(float in_w, float in_x, float in_y, float in_z)

inline Quaternion(Quaternion const &that)

inline Quaternion Slerp(Quaternion const &in_right, float in_fraction, bool in_shortest_path_only = true) const

inline Quaternion Spline(Quaternion const &in_previous, Quaternion const &in_next) const

Calculate a control point to be used in spline interpolation

Parameters

• in_previous – The control point before this

• in_next – The control point after this

Returns

Resultant spline control point

inline Quaternion Squad(Quaternion const &in_right, Quaternion const &in_control1, Quaternion const &in_control2, float in_fraction) const

Spherical cubic interpolation between two Quaternions

Parameters

• in_right – The Quaternion for interpolation.

• in_control1 – The first control point.

• in_control2 – The second control point.

• in_fraction – Interpolation distance (0 - 1).

Returns

Result of interpolation.

Public Members

float w

float x

float y

float z

Public Static Functions

static inline Quaternion ComputeRotation(float in_degrees, HPS::Vector const &in_axis)

Computes a quaternion from a rotation about an axis.

Parameters

• in_degrees – The angle in degrees to rotate.

• in_axis – The axis to rotate about.

Returns

The resulting Quaternion object.

static inline Quaternion ComputeRotation(float in_x, float in_y, float in_z)

Computes a quaternion from a rotation around the primary axes.

Parameters

• in_x – The number of degrees to rotate around the x-axis.

• in_y – The number of degrees to rotate around the y-axis.

• in_z – The number of degrees to rotate around the z-axis.

Returns

The resulting Quaternion object.

Friends

inline friend Quaternion operator*(float in_left, Quaternion const &in_right)