graphene:quad-init (q p0 p1 p2 p3)

q -- a graphene:quad-t instance
p0 -- a graphene:point-t instance with the first point of the quadrilateral
p1 -- a graphene:point-t instance with the second point of the quadrilateral
p2 -- a graphene:point-t instance with the third point of the quadrilateral
p3 -- a graphene:point-t instance with the fourth point of the quadrilateral

The initialized graphene:quad-t instance.

Initializes a quadrilateral with the given points.