(*

 * Hedgewars, a worms-like game

 * Copyright (c) 2005 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * Distributed under the terms of the BSD-modified licence:

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * with the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO

 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *)

unit uAIAmmoTests;

interface

uses uConsts, SDLh;

{$INCLUDE options.inc}

const ctfNotFull = $00000001;

      ctfBreach  = $00000002;

function TestGrenade(Me, Targ: TPoint; Flags: Longword; out Time: Longword; out Angle, Power: integer): boolean;

function TestBazooka(Me, Targ: TPoint; Flags: Longword; out Time: Longword; out Angle, Power: integer): boolean;

function TestShotgun(Me, Targ: TPoint; Flags: Longword; out Time: Longword; out Angle, Power: integer): boolean;

type TAmmoTestProc = function (Me, Targ: TPoint; Flags: Longword; out Time: Longword; out Angle, Power: integer): boolean;

const AmmoTests: array[TAmmoType] of

                    record

                    Test: TAmmoTestProc;

                    Flags: Longword;

                    end = (

                    ( Test: TestGrenade;

                      Flags: ctfNotFull;

                    ),

                    ( Test: TestBazooka;

                      Flags: ctfNotFull or ctfBreach;

                    ),

                    ( Test: nil;

                      Flags: 0;

                    ),

                    ( Test: TestShotgun;

                      Flags: ctfBreach;

                    ),

                    ( Test: nil;

                      Flags: 0;

                    ),

                    ( Test: nil;

                      Flags: 0;

                    ),

                    ( Test: nil;

                      Flags: 0;

                    ),

                    ( Test: nil;

                      Flags: 0;

                    ),

                    ( Test: nil;

                      Flags: 0;

                    )

                    );

implementation

uses uMisc, uAIMisc;

function TestGrenade(Me, Targ: TPoint; Flags: Longword; out Time: Longword; out Angle, Power: integer): boolean;

var Vx, Vy, r: real;

    flHasTrace: boolean;

    function CheckTrace: boolean;

    var x, y, dY: real;

        t: integer;

    begin

    x:= Me.X;

    y:= Me.Y;

    dY:= -Vy;

    Result:= false;

    if (Flags and ctfNotFull) = 0 then t:= Time

                                  else t:= Time - 100;

    repeat

      x:= x + Vx;

      y:= y + dY;

      dY:= dY + cGravity;

      if TestColl(round(x), round(y), 5) then exit;

      dec(t);

    until t <= 0;

    Result:= true

    end;

begin

Result:= false;

Time:= 0;

flHasTrace:= false;

repeat

  inc(Time, 1000);

  Vx:= (Targ.X - Me.X) / Time;

  Vy:= cGravity*(Time div 2) - (Targ.Y - Me.Y) / Time;

  r:= sqr(Vx) + sqr(Vy);

  if r <= 1 then flHasTrace:= CheckTrace

            else exit

until flHasTrace or (Time = 5000);

if not flHasTrace then exit;

r:= sqrt(r);

Angle:= DxDy2Angle(Vx, Vy);

Power:= round(r * cMaxPower);

Result:= true

end;

function TestBazooka(Me, Targ: TPoint; Flags: Longword; out Time: Longword; out Angle, Power: integer): boolean;

var Vx, Vy, r: real;

    rTime: real;

    flHasTrace: boolean;

    function CheckTrace: boolean;

    var x, y, dX, dY: real;

        t: integer;

    begin

    x:= Me.X + Vx*20;

    y:= Me.Y + Vy*20;

    dX:= Vx;

    dY:= -Vy;

    Result:= false;

    if (Flags and ctfNotFull) = 0 then t:= trunc(rTime)

                                  else t:= trunc(rTime) - 100;

    repeat

      x:= x + dX;

      y:= y + dY;

      dX:= dX + cWindSpeed;

      dY:= dY + cGravity;

      if TestColl(round(x), round(y), 5) then

         begin

         if (Flags and ctfBreach) <> 0 then

            Result:= NoMyHHNear(round(x), round(y), 110);

         exit

         end;

      dec(t)

    until t <= 0;

    Result:= true

    end;

begin

Time:= 0;

Result:= false;

rTime:= 10;

flHasTrace:= false;

repeat

  rTime:= rTime + 100 + random*300;

  Vx:= - cWindSpeed * rTime / 2 + (Targ.X - Me.X) / rTime;

  Vy:= cGravity * rTime / 2 - (Targ.Y - Me.Y) / rTime;

  r:= sqr(Vx) + sqr(Vy);

  if r <= 1 then flHasTrace:= CheckTrace

until flHasTrace or (rTime >= 5000);

if not flHasTrace then exit;

r:= sqrt(r);

Angle:= DxDy2Angle(Vx, Vy);

Power:= round(r * cMaxPower);

Result:= true

end;

function TestShotgun(Me, Targ: TPoint; Flags: Longword; out Time: Longword; out Angle, Power: integer): boolean;

var Vx, Vy, x, y: real;

begin

Time:= 0;

Power:= 1;

Vx:= (Targ.X - Me.X)/1024;

Vy:= (Targ.Y - Me.Y)/1024;

x:= Me.X;

y:= Me.Y;

Angle:= DxDy2Angle(Vx, -Vy);

repeat

  x:= x + vX;

  y:= y + vY;

  if TestColl(round(x), round(y), 2) then

     begin

     if (Flags and ctfBreach) <> 0 then

        Result:= NoMyHHNear(round(x), round(y), 27)

        else Result:= false;

     exit

     end

until (abs(Targ.X - x) + abs(Targ.Y - y) < 4) or (x < 0) or (y < 0) or (x > 2048) or (y > 1024);

Result:= true

end;

end.