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56 lines
907 B
OCaml
56 lines
907 B
OCaml
type t = float array
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let zero =
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[| 0. ; 0. ; 0. |]
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let of_float_triplet (x,y,z) =
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[|x;y;z|]
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let of_3_floats x y z =
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[|x;y;z|]
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let to_string x =
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(string_of_float x.(0))^" "^(string_of_float x.(1))^" "^(string_of_float x.(2))
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let x a = a.(0)
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let y a = a.(1)
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let z a = a.(2)
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let coord a = function
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| 0 -> a.(0)
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| 1 -> a.(1)
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| 2 -> a.(2)
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| _ -> raise (Invalid_argument "Coordinate")
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let to_float_array a = a
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(** Linear algebra *)
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let (|-) a b =
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match a,b with
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| [|x;y;z|], [|x';y';z'|] -> [| x-.x'; y-.y'; z-.z' |]
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| _ -> assert false
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let (|+) a b =
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match a,b with
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| [|x;y;z|], [|x';y';z'|] -> [| x+.x'; y+.y'; z+.z' |]
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| _ -> assert false
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let (|.) s a =
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match a with
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| [|x;y;z|] -> [| s*.x; s*.y; s*.z |]
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| _ -> assert false
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let dot a b =
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match a,b with
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| [|x;y;z|], [|x';y';z'|] -> x*.x' +. y*.y' +. z*.z'
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| _ -> assert false
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let norm u =
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sqrt @@ dot u u
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