graphene_quaternion_alloc ()

graphene_quaternion_t *
graphene_quaternion_alloc (void);

Allocates a new graphene_quaternion_t.

The contents of the returned value are undefined.

[constructor]

Since: 1.0

graphene_quaternion_free ()

void
graphene_quaternion_free (graphene_quaternion_t *q);

Releases the resources allocated by graphene_quaternion_alloc().

Since: 1.0

graphene_quaternion_init ()

graphene_quaternion_t *
graphene_quaternion_init (graphene_quaternion_t *q,
                          float x,
                          float y,
                          float z,
                          float w);

Initializes a graphene_quaternion_t using the given four values.

Since: 1.0

graphene_quaternion_init_identity ()

graphene_quaternion_t *
graphene_quaternion_init_identity (graphene_quaternion_t *q);

Initializes a graphene_quaternion_t using the identity transformation.

Since: 1.0

graphene_quaternion_init_from_quaternion ()

graphene_quaternion_t *
graphene_quaternion_init_from_quaternion
                               (graphene_quaternion_t *q,
                                const graphene_quaternion_t *src);

Initializes a graphene_quaternion_t with the values from src .

Since: 1.0

graphene_quaternion_init_from_vec4 ()

graphene_quaternion_t *
graphene_quaternion_init_from_vec4 (graphene_quaternion_t *q,
                                    const graphene_vec4_t *src);

Initializes a graphene_quaternion_t with the values from src .

Since: 1.0

graphene_quaternion_init_from_matrix ()

graphene_quaternion_t *
graphene_quaternion_init_from_matrix (graphene_quaternion_t *q,
                                      const graphene_matrix_t *m);

Initializes a graphene_quaternion_t using the rotation components of a transformation matrix.

Since: 1.0

graphene_quaternion_init_from_angles ()

graphene_quaternion_t *
graphene_quaternion_init_from_angles (graphene_quaternion_t *q,
                                      float deg_x,
                                      float deg_y,
                                      float deg_z);

Initializes a graphene_quaternion_t using the values of the Euler angles on each axis.

See also: graphene_quaternion_init_from_euler()

Since: 1.0

graphene_quaternion_init_from_radians ()

graphene_quaternion_t *
graphene_quaternion_init_from_radians (graphene_quaternion_t *q,
                                       float rad_x,
                                       float rad_y,
                                       float rad_z);

Initializes a graphene_quaternion_t using the values of the Euler angles on each axis.

See also: graphene_quaternion_init_from_euler()

Since: 1.0

graphene_quaternion_init_from_angle_vec3 ()

graphene_quaternion_t *
graphene_quaternion_init_from_angle_vec3
                               (graphene_quaternion_t *q,
                                float angle,
                                const graphene_vec3_t *axis);

Initializes a graphene_quaternion_t using an angle on a specific axis .

Since: 1.0

graphene_quaternion_init_from_euler ()

graphene_quaternion_t *
graphene_quaternion_init_from_euler (graphene_quaternion_t *q,
                                     const graphene_euler_t *e);

Initializes a graphene_quaternion_t using the given graphene_euler_t.

Since: 1.2

graphene_quaternion_to_vec4 ()

void
graphene_quaternion_to_vec4 (const graphene_quaternion_t *q,
                             graphene_vec4_t *res);

Copies the components of a graphene_quaternion_t into a graphene_vec4_t.

Since: 1.0

graphene_quaternion_to_matrix ()

void
graphene_quaternion_to_matrix (const graphene_quaternion_t *q,
                               graphene_matrix_t *m);

Converts a quaternion into a transformation matrix expressing the rotation defined by the graphene_quaternion_t.

Since: 1.0

graphene_quaternion_to_angles ()

void
graphene_quaternion_to_angles (const graphene_quaternion_t *q,
                               float *deg_x,
                               float *deg_y,
                               float *deg_z);

Converts a graphene_quaternion_t to its corresponding rotations on the Euler angles on each axis.

Since: 1.2

graphene_quaternion_to_radians ()

void
graphene_quaternion_to_radians (const graphene_quaternion_t *q,
                                float *rad_x,
                                float *rad_y,
                                float *rad_z);

Converts a graphene_quaternion_t to its corresponding rotations on the Euler angles on each axis.

Since: 1.2

graphene_quaternion_to_angle_vec3 ()

void
graphene_quaternion_to_angle_vec3 (const graphene_quaternion_t *q,
                                   float *angle,
                                   graphene_vec3_t *axis);

Converts a quaternion into an angle , axis pair.

Since: 1.0

graphene_quaternion_equal ()

bool
graphene_quaternion_equal (const graphene_quaternion_t *a,
                           const graphene_quaternion_t *b);

Checks whether the given quaternions are equal.

Since: 1.0

graphene_quaternion_dot ()

float
graphene_quaternion_dot (const graphene_quaternion_t *a,
                         const graphene_quaternion_t *b);

Computes the dot product of two graphene_quaternion_t.

Since: 1.0

graphene_quaternion_invert ()

void
graphene_quaternion_invert (const graphene_quaternion_t *q,
                            graphene_quaternion_t *res);

Inverts a graphene_quaternion_t, and returns the conjugate quaternion of q .

Since: 1.0

graphene_quaternion_normalize ()

void
graphene_quaternion_normalize (const graphene_quaternion_t *q,
                               graphene_quaternion_t *res);

Normalizes a graphene_quaternion_t.

Since: 1.0

graphene_quaternion_add ()

void
graphene_quaternion_add (const graphene_quaternion_t *a,
                         const graphene_quaternion_t *b,
                         graphene_quaternion_t *res);

Adds two graphene_quaternion_t a and b .

Since: 1.10

graphene_quaternion_multiply ()

void
graphene_quaternion_multiply (const graphene_quaternion_t *a,
                              const graphene_quaternion_t *b,
                              graphene_quaternion_t *res);

Multiplies two graphene_quaternion_t a and b .

Since: 1.10

graphene_quaternion_scale ()

void
graphene_quaternion_scale (const graphene_quaternion_t *q,
                           float factor,
                           graphene_quaternion_t *res);

Scales all the elements of a graphene_quaternion_t q using the given scalar factor.

Since: 1.10

graphene_quaternion_slerp ()

void
graphene_quaternion_slerp (const graphene_quaternion_t *a,
                           const graphene_quaternion_t *b,
                           float factor,
                           graphene_quaternion_t *res);

Interpolates between the two given quaternions using a spherical linear interpolation, or SLERP, using the given interpolation factor .

Since: 1.0

graphene_quaternion_t

typedef struct {
} graphene_quaternion_t;

A quaternion.

The contents of the graphene_quaternion_t structure are private and should never be accessed directly.

Since: 1.0