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Functions
graphene_ray_t *  graphene_ray_alloc () 
void  graphene_ray_free () 
graphene_ray_t *  graphene_ray_init () 
graphene_ray_t *  graphene_ray_init_from_ray () 
graphene_ray_t *  graphene_ray_init_from_vec3 () 
void  graphene_ray_get_origin () 
void  graphene_ray_get_direction () 
void  graphene_ray_get_position_at () 
float  graphene_ray_get_distance_to_point () 
float  graphene_ray_get_distance_to_plane () 
void  graphene_ray_get_closest_point_to_point () 
bool  graphene_ray_equal () 
Description
graphene_ray_t is a structure representing a ray emitted by an origin, identified by a point in 3D space, in a given direction, identified by a vector with 3 components.
Functions
graphene_ray_alloc ()
graphene_ray_t *
graphene_ray_alloc (void
);
Allocates a new graphene_ray_t structure.
The contents of the returned structure are undefined.
[constructor]
Returns
the newly allocated graphene_ray_t.
Use graphene_ray_free()
to free the resources allocated by
this function.
[transfer full]
Since: 1.4
graphene_ray_free ()
void
graphene_ray_free (graphene_ray_t *r
);
Frees the resources allocated by graphene_ray_alloc()
.
Since: 1.4
graphene_ray_init ()
graphene_ray_t * graphene_ray_init (graphene_ray_t *r
,const graphene_point3d_t *origin
,const graphene_vec3_t *direction
);
Initializes the given graphene_ray_t using the given origin
and direction
values.
Parameters
r 
the graphene_ray_t to initialize 

origin 
the origin of the ray. 
[nullable] 
direction 
the direction vector. 
[nullable] 
Since: 1.4
graphene_ray_init_from_ray ()
graphene_ray_t * graphene_ray_init_from_ray (graphene_ray_t *r
,const graphene_ray_t *src
);
Initializes the given graphene_ray_t using the origin and direction values of another graphene_ray_t.
Since: 1.4
graphene_ray_init_from_vec3 ()
graphene_ray_t * graphene_ray_init_from_vec3 (graphene_ray_t *r
,const graphene_vec3_t *origin
,const graphene_vec3_t *direction
);
Initializes the given graphene_ray_t using the given vectors.
Since: 1.4
graphene_ray_get_origin ()
void graphene_ray_get_origin (const graphene_ray_t *r
,graphene_point3d_t *origin
);
Retrieves the origin of the given graphene_ray_t.
Since: 1.4
graphene_ray_get_direction ()
void graphene_ray_get_direction (const graphene_ray_t *r
,graphene_vec3_t *direction
);
Retrieves the direction of the given graphene_ray_t.
Since: 1.4
graphene_ray_get_position_at ()
void graphene_ray_get_position_at (const graphene_ray_t *r
,float t
,graphene_point3d_t *position
);
Retrieves the coordinates of a point at the distance t
along the
given graphene_ray_t.
Parameters
r 

t 
the distance along the ray 

position 
return location for the position. 
[out callerallocates] 
Since: 1.4
graphene_ray_get_distance_to_point ()
float graphene_ray_get_distance_to_point (const graphene_ray_t *r
,const graphene_point3d_t *p
);
Computes the distance from the origin of the given ray to the given point.
Since: 1.4
graphene_ray_get_distance_to_plane ()
float graphene_ray_get_distance_to_plane (const graphene_ray_t *r
,const graphene_plane_t *p
);
Computes the distance of the origin of the given graphene_ray_t from the given plane.
If the ray does not intersect the plane, this function returns INFINITY
.
Since: 1.4
graphene_ray_get_closest_point_to_point ()
void graphene_ray_get_closest_point_to_point (const graphene_ray_t *r
,const graphene_point3d_t *p
,graphene_point3d_t *res
);
Computes the point on the given graphene_ray_t that is closest to the
given point p
.
Since: 1.4
graphene_ray_equal ()
bool graphene_ray_equal (const graphene_ray_t *a
,const graphene_ray_t *b
);
Checks whether the two given graphene_ray_t are equal.
Since: 1.4
Types and Values
graphene_ray_t
typedef struct { } graphene_ray_t;
A ray emitted from an origin in a given direction.
The contents of the graphene_ray_t
structure are private, and should not
be modified directly.
Since: 1.4