(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2005-2008 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

 *)

{$INCLUDE "options.inc"}

unit uAIAmmoTests;

interface

uses SDLh, uGears, uConsts, uFloat;

const amtest_OnTurn = $00000001;

type TAttackParams = record

            Time: Longword;

            Angle, Power: LongInt;

            ExplX, ExplY, ExplR: LongInt;

            AttackPutX, AttackPutY: LongInt;

            end;

function TestBazooka(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestGrenade(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestMolotov(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestClusterBomb(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestWatermelon(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestMortar(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestShotgun(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestDesertEagle(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestBaseballBat(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestFirePunch(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

function TestAirAttack(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

type TAmmoTestProc = function (Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

    TAmmoTest = record

            proc: TAmmoTestProc;

            flags: Longword;

            end;

const AmmoTests: array[TAmmoType] of TAmmoTest =

            (

            (proc: nil;              flags: 0), // amNothing

            (proc: @TestGrenade;     flags: 0), // amGrenade

            (proc: @TestClusterBomb; flags: 0), // amClusterBomb

            (proc: @TestBazooka;     flags: 0), // amBazooka

            (proc: nil;              flags: 0), // amUFO

            (proc: @TestShotgun;     flags: 0), // amShotgun

            (proc: nil;              flags: 0), // amPickHammer

            (proc: nil;              flags: 0), // amSkip

            (proc: nil;              flags: 0), // amRope

            (proc: nil;              flags: 0), // amMine

            (proc: @TestDesertEagle; flags: 0), // amDEagle

            (proc: nil;              flags: 0), // amDynamite

            (proc: @TestFirePunch;   flags: 0), // amFirePunch

            (proc: @TestFirePunch;   flags: 0), // amWhip

            (proc: @TestBaseballBat; flags: 0), // amBaseballBat

            (proc: nil;              flags: 0), // amParachute

            (proc: @TestAirAttack;   flags: amtest_OnTurn), // amAirAttack

            (proc: nil;              flags: 0), // amMineStrike

            (proc: nil;              flags: 0), // amBlowTorch

            (proc: nil;              flags: 0), // amGirder

            (proc: nil;              flags: amtest_OnTurn), // amTeleport

            (proc: nil;              flags: 0), // amSwitch

            (proc: @TestMortar;      flags: 0), // amMortar

            (proc: nil;              flags: 0), // amKamikaze

            (proc: nil;              flags: 0), // amCake

            (proc: nil;              flags: 0), // amSeduction

            (proc: @TestWatermelon;  flags: 0), // amWatermelon

            (proc: nil;              flags: 0), // amHellishBomb

            (proc: nil;              flags: 0), // amNapalm

            (proc: nil;              flags: 0), // amDrill

            (proc: nil;              flags: 0), // amBallgun

            (proc: nil;              flags: 0), // amRCPlane

            (proc: nil;              flags: 0), // amLowGravity

            (proc: nil;              flags: 0), // amExtraDamage

            (proc: nil;              flags: 0), // amInvulnerable

            (proc: nil;              flags: 0), // amExtraTime

            (proc: nil;              flags: 0), // amLaserSight

            (proc: nil;              flags: 0), // amVampiric

            (proc: nil;              flags: 0), // amSniperRifle

            (proc: nil;              flags: 0),  // amJetpack

            (proc: @TestMolotov;     flags: 0) // amMolotov

            );

const BadTurn = Low(LongInt) div 4;

implementation

uses uMisc, uAIMisc, uLand;

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

begin

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

end;

function TestBazooka(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

var Vx, Vy, r: hwFloat;

    rTime: LongInt;

    Score, EX, EY: LongInt;

    valueResult: LongInt;

    function CheckTrace: LongInt;

    var x, y, dX, dY: hwFloat;

        t: LongInt;

        value: LongInt;

    begin

    x:= Me^.X;

    y:= Me^.Y;

    dX:= Vx;

    dY:= -Vy;

    t:= rTime;

    repeat

      x:= x + dX;

      y:= y + dY;

      dX:= dX + cWindSpeed;

      dY:= dY + cGravity;

      dec(t)

    until TestCollExcludingMe(Me, hwRound(x), hwRound(y), 5) or (t <= 0);

    EX:= hwRound(x);

    EY:= hwRound(y);

    value:= RateExplosion(Me, EX, EY, 101);

    if value = 0 then value:= - Metric(Targ.X, Targ.Y, EX, EY) div 64;

    CheckTrace:= value;

    end;

begin

ap.Time:= 0;

rTime:= 350;

ap.ExplR:= 0;

valueResult:= BadTurn;

repeat

  rTime:= rTime + 300 + Level * 50 + random(300);

  Vx:= - cWindSpeed * rTime * _0_5 + (int2hwFloat(Targ.X + AIrndSign(2)) - Me^.X) / int2hwFloat(rTime);

  Vy:= cGravity * rTime * _0_5 - (int2hwFloat(Targ.Y) - Me^.Y) / int2hwFloat(rTime);

  r:= Distance(Vx, Vy);

  if not (r > _1) then

     begin

     Score:= CheckTrace;

     if valueResult <= Score then

        begin

        ap.Angle:= DxDy2AttackAngle(Vx, Vy) + AIrndSign(random((Level - 1) * 9));

        ap.Power:= hwRound(r * cMaxPower) - random((Level - 1) * 17 + 1);

        ap.ExplR:= 100;

        ap.ExplX:= EX;

        ap.ExplY:= EY;

        valueResult:= Score

        end;

     end

until (rTime > 4250);

TestBazooka:= valueResult

end;

function TestMolotov(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

var Vx, Vy, r: hwFloat;

    Score, EX, EY, valueResult: LongInt;

    TestTime: Longword;

    function CheckTrace: LongInt;

    var x, y, dY: hwFloat;

        t: LongInt;

    begin

    x:= Me^.X;

    y:= Me^.Y;

    dY:= -Vy;

    t:= TestTime;

    repeat

      x:= x + Vx;

      y:= y + dY;

      dY:= dY + cGravity;

      dec(t)

    until TestCollExcludingMe(Me, hwRound(x), hwRound(y), 7) or (t = 0);

    EX:= hwRound(x);

    EY:= hwRound(y);

    if t < 50 then CheckTrace:= RateExplosion(Me, EX, EY, 97)  // average of 17 attempts, most good, but some failing spectacularly

              else CheckTrace:= BadTurn

    end;

begin

valueResult:= BadTurn;

TestTime:= 0;

ap.ExplR:= 0;

repeat

  r:= Distance(Vx, Vy);

  if not (r > _1) then

     begin

     Score:= CheckTrace;

     if valueResult < Score then

        begin

        ap.Angle:= DxDy2AttackAngle(Vx, Vy) + AIrndSign(random(Level));

        ap.Power:= hwRound(r * cMaxPower) + AIrndSign(random(Level) * 15);

        ap.Time:= TestTime;

        ap.ExplR:= 100;

        ap.ExplX:= EX;

        ap.ExplY:= EY;

        valueResult:= Score

        end;

     end

TestMolotov:= valueResult

end;

function TestGrenade(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

const tDelta = 24;

var Vx, Vy, r: hwFloat;

    Score, EX, EY, valueResult: LongInt;

    TestTime: Longword;

    function CheckTrace: LongInt;

    var x, y, dY: hwFloat;

        t: LongInt;

    begin

    x:= Me^.X;

    y:= Me^.Y;

    dY:= -Vy;

    t:= TestTime;

    repeat

      x:= x + Vx;

      y:= y + dY;

      dY:= dY + cGravity;

      dec(t)

    until TestCollExcludingMe(Me, hwRound(x), hwRound(y), 5) or (t = 0);

    EX:= hwRound(x);

    EY:= hwRound(y);

    if t < 50 then CheckTrace:= RateExplosion(Me, EX, EY, 101)

              else CheckTrace:= BadTurn

    end;

begin

valueResult:= BadTurn;

TestTime:= 0;

ap.ExplR:= 0;

repeat

  inc(TestTime, 1000);

  Vx:= (int2hwFloat(Targ.X) - Me^.X) / int2hwFloat(TestTime + tDelta);

  Vy:= cGravity * ((TestTime + tDelta) div 2) - (int2hwFloat(Targ.Y) - Me^.Y) / int2hwFloat(TestTime + tDelta);

  r:= Distance(Vx, Vy);

  if not (r > _1) then

     begin

     Score:= CheckTrace;

     if valueResult < Score then

        begin

        ap.Angle:= DxDy2AttackAngle(Vx, Vy) + AIrndSign(random(Level));

        ap.Power:= hwRound(r * cMaxPower) + AIrndSign(random(Level) * 15);

        ap.Time:= TestTime;

        ap.ExplR:= 100;

        ap.ExplX:= EX;

        ap.ExplY:= EY;

        valueResult:= Score

        end;

     end

until (TestTime = 4000);

TestGrenade:= valueResult

end;

function TestClusterBomb(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

const tDelta = 24;

var Vx, Vy, r: hwFloat;

    Score, EX, EY, valueResult: LongInt;

    TestTime: Longword;

    function CheckTrace: LongInt;

    var x, y, dY: hwFloat;

        t: LongInt;

    begin

    x:= Me^.X;

    y:= Me^.Y;

    dY:= -Vy;

    t:= TestTime;

    repeat

      x:= x + Vx;

      y:= y + dY;

      dY:= dY + cGravity;

      dec(t)

    until TestCollExcludingMe(Me, hwRound(x), hwRound(y), 5) or (t = 0);

    EX:= hwRound(x);

    EY:= hwRound(y);

    if t < 50 then CheckTrace:= RateExplosion(Me, EX, EY, 81)

              else CheckTrace:= BadTurn

    end;

begin

valueResult:= BadTurn;

TestTime:= 0;

ap.ExplR:= 0;

repeat

  inc(TestTime, 1000);

  // Try to overshoot slightly, seems to pay slightly better dividends in terms of hitting cluster

  if Me^.X<int2hwFloat(Targ.X) then

      Vx:= (int2hwFloat(Targ.X+10) - Me^.X) / int2hwFloat(TestTime + tDelta)

  else

      Vx:= (int2hwFloat(Targ.X-10) - Me^.X) / int2hwFloat(TestTime + tDelta);

  Vy:= cGravity * ((TestTime + tDelta) div 2) - (int2hwFloat(Targ.Y-25) - Me^.Y) / int2hwFloat(TestTime + tDelta);

  r:= Distance(Vx, Vy);

  if not (r > _1) then

     begin

     Score:= CheckTrace;

     if valueResult < Score then

        begin

        ap.Angle:= DxDy2AttackAngle(Vx, Vy) + AIrndSign(random(Level));

        ap.Power:= hwRound(r * cMaxPower) + AIrndSign(random(Level) * 15);

        ap.Time:= TestTime;

        ap.ExplR:= 90;

        ap.ExplX:= EX;

        ap.ExplY:= EY;

        valueResult:= Score

        end;

     end

until (TestTime = 4000);

TestClusterBomb:= valueResult

end;

function TestWatermelon(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

const tDelta = 24;

var Vx, Vy, r: hwFloat;

    Score, EX, EY, valueResult: LongInt;

    TestTime: Longword;

    function CheckTrace: LongInt;

    var x, y, dY: hwFloat;

        t: LongInt;

    begin

    x:= Me^.X;

    y:= Me^.Y;

    dY:= -Vy;

    t:= TestTime;

    repeat

      x:= x + Vx;

      y:= y + dY;

      dY:= dY + cGravity;

      dec(t)

    until TestCollExcludingMe(Me, hwRound(x), hwRound(y), 5) or (t = 0);

    EX:= hwRound(x);

    EY:= hwRound(y);

    if t < 50 then CheckTrace:= RateExplosion(Me, EX, EY, 381)

              else CheckTrace:= BadTurn

    end;

begin

valueResult:= BadTurn;

TestTime:= 0;

ap.ExplR:= 0;

repeat

  inc(TestTime, 1000);

  Vx:= (int2hwFloat(Targ.X) - Me^.X) / int2hwFloat(TestTime + tDelta);

  Vy:= cGravity * ((TestTime + tDelta) div 2) - (int2hwFloat(Targ.Y-125) - Me^.Y) / int2hwFloat(TestTime + tDelta);

  r:= Distance(Vx, Vy);

  if not (r > _1) then

     begin

     Score:= CheckTrace;

     if valueResult < Score then

        begin

        ap.Angle:= DxDy2AttackAngle(Vx, Vy) + AIrndSign(random(Level));

        ap.Power:= hwRound(r * cMaxPower) + AIrndSign(random(Level) * 15);

        ap.Time:= TestTime;

        ap.ExplR:= 300;

        ap.ExplX:= EX;

        ap.ExplY:= EY;

        valueResult:= Score

        end;

     end

until (TestTime = 4000);

TestWatermelon:= valueResult

end;

function TestMortar(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

const tDelta = 24;

var Vx, Vy: hwFloat;

    Score, EX, EY, valueResult: LongInt;

    TestTime: Longword;

    function CheckTrace: LongInt;

    var x, y, dY: hwFloat;

        value: LongInt;

    begin

        x:= Me^.X;

        y:= Me^.Y;

        dY:= -Vy;

        repeat

            x:= x + Vx;

            y:= y + dY;

            dY:= dY + cGravity;

            EX:= hwRound(x);

            EY:= hwRound(y);

        until TestCollExcludingMe(Me, EX, EY, 5) or (EY > 1000);

        if (EY < 1000) and not dY.isNegative then

            begin

            value:= RateExplosion(Me, EX, EY, 91);

            if (value = 0) then

                if (dY > _0_15) then

                    value:= - abs(Targ.Y - EY) div 32

                else

                    value:= BadTurn

            else if (value < 0) then value:= BadTurn

            end

        else

            value:= BadTurn;

        CheckTrace:= value;

    end;

    function Solve: LongWord;

    var A, B, D, T: hwFloat;

        C: LongInt;

    begin

        A:= hwSqr(cGravity) * _0_25;

        B:= - cGravity * (Targ.Y - hwRound(Me^.Y)) - _1;

        C:= sqr(Targ.Y - hwRound(Me^.Y)) + sqr(Targ.X - hwRound(Me^.X));

        D:= hwSqr(B) - (A * C * 4);

        if D.isNegative = false then

            begin

            D:= ( - B + hwSqrt(D)) * _0_5 / A;

            if D.isNegative = false then

                T:= hwSqrt(D)

            else

                T:= _0;

            Solve:= hwRound(T)

            end else Solve:= 0

    end;

begin

valueResult:= BadTurn;

ap.ExplR:= 0;

if (Level > 2) then exit(BadTurn);

TestTime:= Solve;

if TestTime = 0 then exit(BadTurn);

    Vx:= (int2hwFloat(Targ.X) - Me^.X) / int2hwFloat(TestTime);

    Vy:= cGravity * (TestTime div 2) - (int2hwFloat(Targ.Y) - Me^.Y) / int2hwFloat(TestTime);

    Score:= CheckTrace;

    if valueResult < Score then

        begin

        ap.Angle:= DxDy2AttackAngle(Vx, Vy) + AIrndSign(random(Level));

        ap.Power:= 1;

        ap.ExplR:= 100;

        ap.ExplX:= EX;

        ap.ExplY:= EY;

        valueResult:= Score

        end;

TestMortar:= valueResult;

end;

function TestShotgun(Me: PGear; Targ: TPoint; Level: LongInt; var ap: TAttackParams): LongInt;

const

  MIN_RANGE =  80;

  MAX_RANGE = 400;

var Vx, Vy, x, y: hwFloat;

    rx, ry, valueResult: LongInt;

    range: integer;

begin

ap.ExplR:= 0;

ap.Time:= 0;

ap.Power:= 1;

range:= Metric(hwRound(Me^.X), hwRound(Me^.Y), Targ.X, Targ.Y);

if ( range < MIN_RANGE ) or ( range > MAX_RANGE ) then exit(BadTurn);

Vx:= (int2hwFloat(Targ.X) - Me^.X) * _1div1024;

Vy:= (int2hwFloat(Targ.Y) - Me^.Y) * _1div1024;

x:= Me^.X;

y:= Me^.Y;

ap.Angle:= DxDy2AttackAngle(Vx, -Vy);

repeat

  x:= x + vX;

  y:= y + vY;

  rx:= hwRound(x);

  ry:= hwRound(y);

  if TestCollExcludingMe(Me, rx, ry, 2) then

     begin

     x:= x + vX * 8;

     y:= y + vY * 8;