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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.
A common use of graphene_ray_t is raycasting to find which objects in a 3D scene are under the coordinates of the pointer.
graphene_ray_t *
graphene_ray_alloc (void
);
Allocates a new graphene_ray_t structure.
The contents of the returned structure are undefined.
[constructor]
the newly allocated graphene_ray_t.
Use graphene_ray_free()
to free the resources allocated by
this function.
[transfer full]
Since: 1.4
void
graphene_ray_free (graphene_ray_t *r
);
Frees the resources allocated by graphene_ray_alloc()
.
Since: 1.4
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.
r 
the graphene_ray_t to initialize 

origin 
the origin of the ray. 
[nullable] 
direction 
the direction vector. 
[nullable] 
Since: 1.4
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_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
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
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
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.
r 

t 
the distance along the ray 

position 
return location for the position. 
[out callerallocates] 
Since: 1.4
float graphene_ray_get_distance_to_point (const graphene_ray_t *r
,const graphene_point3d_t *p
);
Computes the distance of the closest approach between the
given graphene_ray_t r
and the point p
.
The closest approach to a ray from a point is the distance between the point and the projection of the point on the ray itself.
Since: 1.4
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
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
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
graphene_ray_intersection_kind_t graphene_ray_intersect_sphere (const graphene_ray_t *r
,const graphene_sphere_t *s
,float *t_out
);
Intersects the given graphene_ray_t r
with the given
graphene_sphere_t s
.
Since: 1.10
bool graphene_ray_intersects_sphere (const graphene_ray_t *r
,const graphene_sphere_t *s
);
Checks if the given graphene_ray_t r
intersects the
given graphene_sphere_t s
.
See also: graphene_ray_intersect_sphere()
Since: 1.10
graphene_ray_intersection_kind_t graphene_ray_intersect_box (const graphene_ray_t *r
,const graphene_box_t *b
,float *t_out
);
Intersects the given graphene_ray_t r
with the given
graphene_box_t b
.
Since: 1.10
bool graphene_ray_intersects_box (const graphene_ray_t *r
,const graphene_box_t *b
);
Checks whether the given graphene_ray_t r
intersects the
given graphene_box_t b
.
See also: graphene_ray_intersect_box()
Since: 1.10
graphene_ray_intersection_kind_t graphene_ray_intersect_triangle (const graphene_ray_t *r
,const graphene_triangle_t *t
,float *t_out
);
Intersects the given graphene_ray_t r
with the given
graphene_triangle_t t
.
Since: 1.10
bool graphene_ray_intersects_triangle (const graphene_ray_t *r
,const graphene_triangle_t *t
);
Checks whether the given graphene_ray_t r
intersects the
given graphene_triangle_t b
.
See also: graphene_ray_intersect_triangle()
Since: 1.10
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