(*

 * Hedgewars, a worms-like game

 * Copyright (c) 2005, 2006 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 SDLh, uGears, uConsts;

function TestBazooka(Me: PGear; Targ: TPoint; out Time: Longword; out Angle, Power: integer; out ExplX, ExplY, ExplR: integer): integer;

function TestGrenade(Me: PGear; Targ: TPoint; out Time: Longword; out Angle, Power: integer; out ExplX, ExplY, ExplR: integer): integer;

function TestShotgun(Me: PGear; Targ: TPoint; out Time: Longword; out Angle, Power: integer; out ExplX, ExplY, ExplR: integer): integer;

type TAmmoTestProc = function (Me: PGear; Targ: TPoint; out Time: Longword; out Angle, Power: integer; out ExplX, ExplY, ExplR: integer): integer;

const AmmoTests: array[TAmmoType] of TAmmoTestProc =

                 (

{amGrenade}       TestGrenade,

{amBazooka}       TestBazooka,

{amUFO}           nil,

{amShotgun}       TestShotgun,

{amPickHammer}    nil,

{amSkip}          nil,

{amRope}          nil,

{amMine}          nil,

{amDynamite}      nil

                  );

implementation

const BadTurn = Low(integer);

function Metric(x1, y1, x2, y2: integer): integer;

begin

Result:= abs(x1 - x2) + abs(y1 - y2)

end;

function TestBazooka(Me: PGear; Targ: TPoint; out Time: Longword; out Angle, Power: integer; out ExplX, ExplY, ExplR: integer): integer;

var Vx, Vy, r: real;

    rTime: real;

    Score, EX, EY: integer;

    function CheckTrace: integer;

    var x, y, dX, dY: real;

        t: integer;

    begin

    x:= Me.X;

    y:= Me.Y;

    dX:= Vx;

    dY:= -Vy;

    t:= trunc(rTime);

    repeat

      x:= x + dX;

      y:= y + dY;

      dX:= dX + cWindSpeed;

      dY:= dY + cGravity;

      dec(t)

    until TestColl(round(x), round(y), 5) or (t <= 0);

    EX:= round(x);

    EY:= round(y);

    Result:= RateExplosion(Me, round(x), round(y), 101);

    if Result = 0 then Result:= - Metric(Targ.X, Targ.Y, round(x), round(y)) div 64

    end;

begin

Time:= 0;

rTime:= 10;

ExplR:= 0;

Result:= BadTurn;

repeat

  rTime:= rTime + 100 + random*250;

  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

     begin

     Score:= CheckTrace;

     if Result <= Score then

        begin

        r:= sqrt(r);

        Angle:= DxDy2AttackAngle(Vx, Vy);

        Power:= round(r * cMaxPower);

        ExplR:= 100;

        ExplX:= EX;

        ExplY:= EY;

        Result:= Score

        end;

     end

until (rTime >= 5000)

end;

function TestGrenade(Me: PGear; Targ: TPoint; out Time: Longword; out Angle, Power: integer; out ExplX, ExplY, ExplR: integer): integer;

const tDelta = 24;

var Vx, Vy, r: real;

    Score, EX, EY: integer;

    TestTime: Longword;

    function CheckTrace: integer;

    var x, y, dY: real;

        t: integer;

    begin

    x:= Me.X;

    y:= Me.Y;

    dY:= -Vy;

    t:= TestTime;

    repeat

      x:= x + Vx;

      y:= y + dY;

      dY:= dY + cGravity;

      dec(t)

    until TestColl(round(x), round(y), 5) or (t = 0);

    EX:= round(x);

    EY:= round(y);

    if t < 50 then Result:= RateExplosion(Me, round(x), round(y), 101)

              else Result:= Low(integer)

    end;

begin

Result:= BadTurn;

TestTime:= 0;

ExplR:= 0;

repeat

  inc(TestTime, 1000);

  Vx:= (Targ.X - Me.X) / (TestTime + tDelta);

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

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

  if r <= 1 then

     begin

     Score:= CheckTrace;

     if Result < Score then

        begin

        r:= sqrt(r);

        Angle:= DxDy2AttackAngle(Vx, Vy);

        Power:= round(r * cMaxPower);

        Time:= TestTime;

        ExplR:= 100;

        ExplX:= EX;

        ExplY:= EY;

        Result:= Score

        end;

     end

until (TestTime = 5000)

end;

function TestShotgun(Me: PGear; Targ: TPoint; out Time: Longword; out Angle, Power: integer; out ExplX, ExplY, ExplR: integer): integer;

var Vx, Vy, x, y: real;

begin

if Metric(round(Me.X), round(Me.Y), Targ.X, Targ.Y) < 80 then

   begin

   Result:= BadTurn;

   exit

   end;

Time:= 0;

Power:= 1;

ExplR:= 0;

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

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

x:= Me.X;

y:= Me.Y;

Angle:= DxDy2AttackAngle(Vx, -Vy);

repeat

  x:= x + vX;

  y:= y + vY;

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

     begin

     Result:= RateExplosion(Me, round(x), round(y), 25) * 2;

     if Result = 0 then Result:= - Metric(Targ.X, Targ.Y, round(x), round(y)) div 64;

     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:= BadTurn

end;

end.