Created
March 28, 2015 20:33
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functional points
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type vector = { x : float ; y : float } | |
let add_pair a b = | |
{ x = a.x +. b.y ; y = a.x +. b.y } | |
module Point = struct | |
class t ~pos ~vel = object (self) | |
val pos = pos | |
val vel = vel | |
method pos = pos | |
method vel = vel | |
method move = {< pos = add_pair pos vel >} | |
method push accel = {< vel = add_pair vel accel >} | |
end | |
let make ~pos ~vel = new t ~pos ~vel | |
let move (obj : #t) = obj#move | |
let push (obj : #t) = obj#push | |
end | |
module Box = struct | |
class t ~pos ~vel ~size = object | |
inherit Point.t ~pos ~vel | |
method size : vector = size | |
end | |
let from_point ~point ~size = | |
new t ~pos:point#pos ~vel:point#vel ~size | |
end | |
module Ball = struct | |
class t ~pos ~vel ~radius = object | |
inherit Point.t ~pos ~vel | |
method radius : float = radius | |
end | |
let from_point ~point ~radius = | |
new t ~pos:point#pos ~vel:point#vel ~radius | |
end |
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type vector = { x : float ; y : float } | |
module Point : sig | |
class t : | |
pos:vector -> | |
vel:vector -> | |
object ('a) | |
method pos : vector | |
method vel : vector | |
method move : 'a | |
method push : vector -> 'a | |
end | |
val make : pos:vector -> vel:vector -> t | |
val move : (#t as 'a) -> 'a | |
val push : (#t as 'a) -> vector -> 'a | |
end | |
module Box : sig | |
class t : | |
pos:vector -> | |
vel:vector -> | |
size:vector -> | |
object ('a) | |
inherit Point.t | |
method size : vector | |
end | |
val from_point : point:#Point.t -> size:vector -> t | |
end | |
module Ball : sig | |
class t : | |
pos:vector -> | |
vel:vector -> | |
radius:float -> | |
object ('a) | |
inherit Point.t | |
method radius : float | |
end | |
val from_point : point:#Point.t -> radius:float -> t | |
end |
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