(*

 * Hedgewars, a worms-like game

 * Copyright (c) 2005, 2006 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program 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; version 2 of the License

 *

 * This program 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 this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

unit uAIAmmoTests;

interface

uses SDLh, uGears, uConsts;

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

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

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

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

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

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

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

const AmmoTests: array[TAmmoType] of TAmmoTestProc =

                 (

{amGrenade}       TestGrenade,

{amClusterBomb}   nil,

{amBazooka}       TestBazooka,

{amUFO}           nil,

{amShotgun}       TestShotgun,

{amPickHammer}    nil,

{amSkip}          nil,

{amRope}          nil,

{amMine}          nil,

{amDEagle}        TestDesertEagle,

{amDynamite}      nil,

{amFirePunch}     TestFirePunch,

{amBaseballBat}   TestBaseballBat,

{amParachute}     nil

                  );

const BadTurn = Low(integer);

implementation

uses uMisc, uAIMisc, uLand;

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

begin

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

end;

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

var Vx, Vy, r: Double;

    rTime: Double;

    Score, EX, EY: integer;

    function CheckTrace: integer;

    var x, y, dX, dY: Double;

        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:= 50;

ExplR:= 0;

Result:= BadTurn;

repeat

  rTime:= rTime + 300 + Level * 50 + random * 200;

  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) + rndSign(random((Level - 1) * 8));

        Power:= round(r * cMaxPower) - random((Level - 1) * 15 + 1);

        ExplR:= 100;

        ExplX:= EX;

        ExplY:= EY;

        Result:= Score

        end;

     end

until (rTime >= 4500)

end;

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

const tDelta = 24;

var Vx, Vy, r: Double;

    Score, EX, EY: integer;

    TestTime: Longword;

    function CheckTrace: integer;

    var x, y, dY: Double;

        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) + rndSign(random(Level));

        Power:= round(r * cMaxPower) + rndSign(random(Level) * 12);

        Time:= TestTime;

        ExplR:= 100;

        ExplX:= EX;

        ExplY:= EY;

        Result:= Score

        end;

     end

until (TestTime = 5000)

end;

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

var Vx, Vy, x, y: Double;

begin       

ExplR:= 0;

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

   begin

   Result:= BadTurn;

   exit

   end;

Time:= 0;

Power:= 1;

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

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

                   else dec(Result, Level * 4000);

     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;

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

var Vx, Vy, x, y, t: Double;

    d: Longword;

begin

ExplR:= 0;

if abs(Me.X - Targ.X) + abs(Me.Y - Targ.Y) < 80 then

   begin

   Result:= BadTurn;

   exit

   end;

Time:= 0;

Power:= 1;

t:= sqrt(sqr(Targ.X - Me.X) + sqr(Targ.Y - Me.Y)) * 2;

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

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

x:= Me.X;

y:= Me.Y;

Angle:= DxDy2AttackAngle(Vx, -Vy);

d:= 0;

repeat

  x:= x + vX;

  y:= y + vY;

  if ((round(x) and $FFFFF800) = 0)and((round(y) and $FFFFFC00) = 0)

     and (Land[round(y), round(x)] <> 0) then inc(d);

until (abs(Targ.X - x) + abs(Targ.Y - y) < 2) or (x < 0) or (y < 0) or (x > 2048) or (y > 1024) or (d > 200);

if abs(Targ.X - x) + abs(Targ.Y - y) < 2 then Result:= max(0, (4 - d div 50) * 7 * 1024)

                                         else Result:= Low(integer)

end;

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

begin

ExplR:= 0;

if (Level > 2) and (abs(Me.X - Targ.X) + abs(Me.Y - Targ.Y) >= 25) then

   begin

   Result:= BadTurn;

   exit

   end;

Time:= 0;

Power:= 1;

Angle:= DxDy2AttackAngle(hwSign(Targ.X - Me.X), 1);

Result:= RateShove(Me, round(Me.X) + 10 * hwSign(Targ.X - Me.X), round(Me.Y), 15, 30);

if Result <= 0 then Result:= BadTurn

end;

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

var i: integer;

begin

ExplR:= 0;

if (abs(Me.X - Targ.X) > 25) or (abs(Me.Y - 50 - Targ.Y) > 50) then

   begin

   Result:= BadTurn;

   exit

   end;

Time:= 0;

Power:= 1;

Angle:= DxDy2AttackAngle(hwSign(Targ.X - Me.X), 1);

Result:= 0;

for i:= 0 to 4 do

    Result:= Result + RateShove(Me, round(Me.X) + 10 * hwSign(Targ.X - Me.X), round(Me.Y) - 20 * i - 5, 10, 30);

if Result <= 0 then Result:= BadTurn

end;

end.