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219 | -------------------------------------------------------------------------------
-- --
-- Eagle Lander --
-- --
-- Copyright (C) 2015 Fabien Chouteau (chouteau@adacore.com) --
-- --
-- Eagle Lander is free software: you can redistribute it and/or modify --
-- it under the terms of the GNU General Public License as published by --
-- the Free Software Foundation, either version 3 of the License, or --
-- (at your option) any later version. --
-- --
-- Eagle Lander is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --
-- GNU General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with Eagle Lander. If not, see <http://www.gnu.org/licenses/>. --
-- --
-------------------------------------------------------------------------------
with Ada.Numerics.Generic_Elementary_Functions;
with Ada.Text_IO; use Ada.Text_IO;
package body Geom is
package Value_Functions is new
Ada.Numerics.Generic_Elementary_Functions (Gdouble);
use Value_Functions;
package Angle_Functions is new
Ada.Numerics.Generic_Elementary_Functions (Angle);
use Angle_Functions;
-----------------
-- To_Vector2D --
-----------------
function To_Vector2D (V1, V2 : Gdouble) return Vector2D is
begin
return (X => V1, Y => V2);
end To_Vector2D;
-----------------
-- To_Vector2D --
-----------------
function To_Vector2D (V1, V2 : Vector2D) return Vector2D is
begin
return (X => V2.X - V1.X, Y => V2.Y - V2.Y);
end To_Vector2D;
---------------
-- Magnitude --
---------------
function Magnitude (Vect : Vector2D) return Gdouble is
begin
return Sqrt (Vect.X**2 + Vect.Y**2);
end Magnitude;
---------------
-- Normalize --
---------------
function Normalize (Vect : Vector2D) return Vector2D is
Mag : constant Gdouble := Magnitude (Vect);
begin
if Mag = 0.0 then
return (X => 0.0, Y => 0.0);
else
return (X => Vect.X / Mag, Y => Vect.Y / Mag);
end if;
end Normalize;
------------
-- Rotate --
------------
function Rotate (Vect : Vector2D; Angle_Rad : Angle) return Vector2D is
begin
return (X => Vect.X * Gdouble (Cos (Angle_Rad)) -
Vect.Y * Gdouble (Sin (Angle_Rad)),
Y => Vect.X * Gdouble (Sin (Angle_Rad)) +
Vect.Y * Gdouble (Cos (Angle_Rad)));
end Rotate;
-------------------
-- Angle_Of_Vect --
-------------------
function Angle_Of_Vect (Vect : Vector2D) return Gdouble is
begin
return Arctan (Vect.Y, Vect.X);
exception
when others =>
Put_Line ("ArcTan Exception");
return 0.0;
end Angle_Of_Vect;
-------------------
-- Angle_Of_Vect --
-------------------
function Angle_Of_Vect (Vect : Vector2D) return Angle is
Ret : constant Gdouble := Angle_Of_Vect (Vect);
begin
return Angle (Ret);
end Angle_Of_Vect;
---------
-- "+" --
---------
function "+" (A : Vector2D; B : Vector2D) return Vector2D is
begin
return (X => A.X + B.X, Y => A.Y + B.Y);
end "+";
---------
-- "+" --
---------
function "+" (A : Vector2D; B : Gdouble) return Vector2D is
begin
return (X => A.X + B, Y => A.Y + B);
end "+";
---------
-- "-" --
---------
function "-" (A : Vector2D; B : Vector2D) return Vector2D is
begin
return (X => A.X - B.X, Y => A.Y - B.Y);
end "-";
---------
-- "-" --
---------
function "-" (A : Vector2D) return Vector2D is
begin
return (X => -A.X, Y => -A.Y);
end "-";
---------
-- "-" --
---------
function "-" (A : Vector2D; B : Gdouble) return Vector2D is
begin
return (X => A.X - B, Y => A.Y - B);
end "-";
---------
-- "*" --
---------
function "*" (A : Vector2D; B : Gdouble) return Vector2D is
begin
return (X => A.X * B, Y => A.Y * B);
end "*";
---------
-- "*" --
---------
function "*" (A : Gdouble; B : Vector2D) return Vector2D is
begin
return (X => B.X * A, Y => B.Y * A);
end "*";
---------
-- "/" --
---------
function "/" (A : Vector2D; B : Gdouble) return Vector2D is
begin
return (X => A.X / B, Y => A.Y / B);
end "/";
------------------
-- Print_Vector --
------------------
procedure Print_Vector (Vector : Vector2D; Prefix : String) is
begin
Put_Line (Prefix & "(X => " & Vector.X'Img
& ", Y =>" & Vector.Y'Img & ")");
end Print_Vector;
---------------------
-- Angle_Normalize --
---------------------
function Angle_Normalize (A : Angle) return Angle is
Ret : Angle := A;
begin
while Ret > Ada.Numerics.Pi loop
Ret := Ret - Ada.Numerics.Pi * 2.0;
end loop;
while Ret < -Ada.Numerics.Pi loop
Ret := Ret + Ada.Numerics.Pi * 2.0;
end loop;
return Ret;
end Angle_Normalize;
----------------
-- Angle_Diff --
----------------
function Angle_Diff (A, B : Angle) return Angle is
begin
return Angle_Normalize (A - B);
end Angle_Diff;
end Geom;
|