graphene:point3d-init (p x y z)

p -- a graphene:point3d-t instance
x -- a number coerced to a float with the x coordinate
y -- a number coerced to a float with the y coordinate
z -- a number coerced to a float with the z coordinate

The initialized graphene:point3d-t instance.

Initializes the point to the given x, y, and z coordinates. It is safe to call this function multiple times.