Quaternions.h File Reference

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Classes
struct	Quaternion

Typedefs
typedef struct Quaternion	Quaternion

Functions
Quaternion	construct_quaternion (float x, float y, float z, float degs)
void	construct_modelview_matrix (Quaternion quaternion, float *mat)
Quaternion	multiply_quaternions (Quaternion a, Quaternion b)

Typedef Documentation

typedef struct Quaternion Quaternion

Structure describing a single quaternion instance.

Function Documentation

void construct_modelview_matrix	(	Quaternion	quaternion,
		float *	mat
	)

Constructs a modelview matrix based on a given quaternion.

Parameters

quaternion	Quaternion describing rotation angle and vector to be used for matrix creation.
mat	Array to store a modelview matrix. Cannot be NULL.

Definition at line 43 of file Quaternions.cpp.

Quaternion construct_quaternion	(	float	x,
		float	y,
		float	z,
		float	degs
	)

Function that returns a new quaternion. It inserts the angle in the real part and the vector in the vector part, yielding a quaternion that represents a rotation around the axis.

Parameters

x	X coordinate of a vector defining a rotation axis.
y	Y coordinate of a vector defining a rotation axis.
z	Z coordinate of a vector defining a rotation axis.
degs	Rotation in degrees.

Returns

Result quaternion.

Definition at line 27 of file Quaternions.cpp.

Quaternion multiply_quaternions	(	Quaternion	a,
		Quaternion	b
	)

Multiplies quaternion a by b and returns the product. NOTE: quaternion multiplication is not commutative.

Parameters

a	Quaternion a.
b	Quaternion b.

Returns

Product a*b.

Definition at line 71 of file Quaternions.cpp.