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https://github.com/QuantumPackage/qp2.git
synced 2024-11-18 19:32:20 +01:00
219 lines
4.7 KiB
OCaml
219 lines
4.7 KiB
OCaml
open Qptypes
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open Qputils
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open Sexplib.Std
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exception MultiplicityError of string
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exception XYZError
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type t = {
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nuclei : Atom.t list ;
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elec_alpha : Elec_alpha_number.t ;
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elec_beta : Elec_beta_number.t ;
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} [@@deriving sexp]
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let get_charge { nuclei ; elec_alpha ; elec_beta } =
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let result =
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(Elec_alpha_number.to_int elec_alpha) +
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(Elec_beta_number.to_int elec_beta)
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in
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let rec nucl_charge = function
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| a::rest -> (Charge.to_float a.Atom.charge) +. nucl_charge rest
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| [] -> 0.
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in
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Charge.of_float (nucl_charge nuclei -. (float_of_int result))
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let get_multiplicity m =
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let elec_alpha =
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m.elec_alpha
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in
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Multiplicity.of_alpha_beta elec_alpha m.elec_beta
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let get_nucl_num m =
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let nmax =
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List.length m.nuclei
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in
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Nucl_number.of_int nmax ~max:nmax
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let name m =
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let cm =
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get_charge m
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|> Charge.to_int
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in
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let c =
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match cm with
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| 0 -> ""
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| 1 -> " (+)"
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| (-1) -> " (-)"
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| i when i>1 -> Printf.sprintf " (%d+)" i
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| i -> Printf.sprintf " (%d-)" (-i)
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in
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let mult =
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get_multiplicity m
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|> Multiplicity.to_string
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in
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let { nuclei ; elec_alpha ; elec_beta } = m
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in
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let rec build_list accu = function
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| a::rest ->
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begin
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let e = a.Atom.element in
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try
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let i = List.assoc e accu in
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build_list ( (e,i+1)::(List.remove_assoc e accu) ) rest
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with Not_found -> build_list ( (e,1)::accu ) rest
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end
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| [] -> accu
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in
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let rec build_name accu = function
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| (a, n)::rest ->
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let a =
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Element.to_string a
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in
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begin
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match n with
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| 1 -> build_name (a::accu) rest
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| i when i>1 ->
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let tmp = Printf.sprintf "%s%d" a i
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in build_name (tmp::accu) rest
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| _ -> assert false
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end
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| [] -> accu
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in
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let result =
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build_list [] nuclei |> build_name [c ; ", " ; mult]
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in
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String.concat "" result
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let to_string_general ~f m =
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let { nuclei ; elec_alpha ; elec_beta } = m
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in
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let n =
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List.length nuclei
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in
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let title =
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name m
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in
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[ string_of_int n ; title ] @ (list_map f nuclei)
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|> String.concat "\n"
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let to_string =
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to_string_general ~f:(fun x -> Atom.to_string ~units:Units.Angstrom x)
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let to_xyz =
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to_string_general ~f:Atom.to_xyz
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let of_xyz_string
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?(charge=(Charge.of_int 0)) ?(multiplicity=(Multiplicity.of_int 1))
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?(units=Units.Angstrom)
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s =
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let l = String_ext.split s ~on:'\n'
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|> List.filter (fun x -> x <> "")
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|> list_map (fun x -> Atom.of_string ~units x)
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in
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let ne = ( get_charge {
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nuclei=l ;
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elec_alpha=(Elec_alpha_number.of_int 1) ;
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elec_beta=(Elec_beta_number.of_int 0) }
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|> Charge.to_int
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) + 1 - (Charge.to_int charge)
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|> Elec_number.of_int
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in
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let (na,nb) =
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Multiplicity.to_alpha_beta ne multiplicity
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in
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let result =
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{ nuclei = l ;
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elec_alpha = na ;
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elec_beta = nb }
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in
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if ((get_multiplicity result) <> multiplicity) then
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let msg = Printf.sprintf
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"With %d electrons multiplicity %d is impossible"
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(Elec_number.to_int ne)
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(Multiplicity.to_int multiplicity)
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in
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raise (MultiplicityError msg);
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else () ;
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result
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let of_xyz_file
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?(charge=(Charge.of_int 0)) ?(multiplicity=(Multiplicity.of_int 1))
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?(units=Units.Angstrom)
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filename =
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let lines =
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match Io_ext.input_lines filename with
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| natoms :: title :: rest ->
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let natoms =
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try
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int_of_string @@ String_ext.strip natoms
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with
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| _ -> raise XYZError
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in
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if natoms <= 0 then
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raise XYZError;
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let a = Array.of_list rest in
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Array.sub a 0 natoms
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|> Array.to_list
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|> String.concat "\n"
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| _ -> raise XYZError
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in
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of_xyz_string ~charge:charge ~multiplicity:multiplicity
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~units:units lines
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let of_zmt_file
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?(charge=(Charge.of_int 0)) ?(multiplicity=(Multiplicity.of_int 1))
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?(units=Units.Angstrom)
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filename =
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Io_ext.read_all filename
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|> Zmatrix.of_string
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|> Zmatrix.to_xyz_string
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|> of_xyz_string ~charge ~multiplicity ~units
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let of_file
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?(charge=(Charge.of_int 0)) ?(multiplicity=(Multiplicity.of_int 1))
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?(units=Units.Angstrom)
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filename =
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try
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of_xyz_file ~charge ~multiplicity ~units filename
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with XYZError ->
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of_zmt_file ~charge ~multiplicity ~units filename
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let distance_matrix molecule =
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let coord =
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molecule.nuclei
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|> list_map (fun x -> x.Atom.coord)
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|> Array.of_list
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in
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let n =
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Array.length coord
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in
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let result =
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Array.make_matrix n n 0.
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in
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for i = 0 to (n-1)
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do
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for j = 0 to (n-1)
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do
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result.(i).(j) <- Point3d.distance coord.(i) coord.(j)
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done;
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done;
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result
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include To_md5
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let to_md5 = to_md5 sexp_of_t
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