hedgewars/uAI.pas
author Xeli
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(*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2004-2011 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 *)
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{$INCLUDE "options.inc"}
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unit uAI;
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interface
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uses uFloat;
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procedure initModule;
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procedure freeModule;
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procedure ProcessBot;
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procedure FreeActionsList;
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implementation
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uses uConsts, SDLh, uAIMisc, uAIAmmoTests, uAIActions,
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     uAmmos, SysUtils{$IFNDEF USE_SDLTHREADS} {$IFDEF UNIX}, cthreads{$ENDIF} {$ENDIF}, uTypes,
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     uVariables, uCommands, uUtils, uDebug;
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var BestActions: TActions;
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    CanUseAmmo: array [TAmmoType] of boolean;
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    StopThinking: boolean;
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{$IFDEF USE_SDLTHREADS} 
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    ThinkThread: PSDL_Thread = nil;
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{$ELSE}
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    ThinkThread: TThreadID;
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{$ENDIF}
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    hasThread: LongInt;
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procedure FreeActionsList;
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begin
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AddFileLog('FreeActionsList called');
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if hasThread <> 0 then
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   begin
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   AddFileLog('Waiting AI thread to finish');
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   StopThinking:= true;
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   repeat
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     SDL_Delay(10)
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   until hasThread = 0
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   end;
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with CurrentHedgehog^ do
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     if Gear <> nil then
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        if BotLevel <> 0 then
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           StopMessages(Gear^.Message);
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BestActions.Count:= 0;
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BestActions.Pos:= 0
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end;
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const cBranchStackSize = 12;
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type TStackEntry = record
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                   WastedTicks: Longword;
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                   MadeActions: TActions;
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                   Hedgehog: TGear;
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                   end;
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var Stack: record
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           Count: Longword;
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           States: array[0..Pred(cBranchStackSize)] of TStackEntry;
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           end;
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function Push(Ticks: Longword; const Actions: TActions; const Me: TGear; Dir: integer): boolean;
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var bRes: boolean;
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begin
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    bRes:= (Stack.Count < cBranchStackSize) and (Actions.Count < MAXACTIONS - 5);
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    if bRes then
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        with Stack.States[Stack.Count] do
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            begin
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            WastedTicks:= Ticks;
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            MadeActions:= Actions;
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            Hedgehog:= Me;
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            Hedgehog.Message:= Dir;
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            inc(Stack.Count)
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            end;
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    Push:= bRes
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end;
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procedure Pop(var Ticks: Longword; var Actions: TActions; var Me: TGear);
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begin
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    dec(Stack.Count);
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    with Stack.States[Stack.Count] do
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        begin
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        Ticks:= WastedTicks;
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        Actions:= MadeActions;
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        Me:= Hedgehog
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        end
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end;
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procedure TestAmmos(var Actions: TActions; Me: PGear; isMoved: boolean);
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var BotLevel: Byte;
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    ap: TAttackParams;
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    Score, i: LongInt;
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    a, aa: TAmmoType;
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begin
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BotLevel:= Me^.Hedgehog^.BotLevel;
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for i:= 0 to Pred(Targets.Count) do
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    if (Targets.ar[i].Score >= 0) and (not StopThinking) then
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       begin
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       with CurrentHedgehog^ do
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            a:= CurAmmoType;
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       aa:= a;
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{$IFDEF USE_SDLTHREADS}
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       SDL_delay(0);    //ThreadSwitch was only a hint
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{$ELSE}
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       ThreadSwitch();
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{$ENDIF}       
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       repeat
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        if (CanUseAmmo[a]) and
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           ((not isMoved) or ((AmmoTests[a].flags and amtest_OnTurn) = 0)) then
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           begin
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{$HINTS OFF}
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           Score:= AmmoTests[a].proc(Me, Targets.ar[i].Point, BotLevel, ap);
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{$HINTS ON}
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           if Actions.Score + Score > BestActions.Score then
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            if (BestActions.Score < 0) or (Actions.Score + Score > BestActions.Score + Byte(BotLevel) * 2048) then
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              begin
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              BestActions:= Actions;
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              inc(BestActions.Score, Score);
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              BestActions.isWalkingToABetterPlace:= false;
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              if (ap.Angle > 0) then AddAction(BestActions, aia_LookRight, 0, 200, 0, 0)
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              else if (ap.Angle < 0) then AddAction(BestActions, aia_LookLeft, 0, 200, 0, 0);
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              AddAction(BestActions, aia_Weapon, Longword(a), 300 + random(400), 0, 0);
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              if (ap.Time <> 0) then AddAction(BestActions, aia_Timer, ap.Time div 1000, 400, 0, 0);
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              if (Ammoz[a].Ammo.Propz and ammoprop_NoCrosshair) = 0 then
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                 begin
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                 ap.Angle:= LongInt(Me^.Angle) - Abs(ap.Angle);
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                 if ap.Angle > 0 then
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                    begin
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                    AddAction(BestActions, aia_Up, aim_push, 300 + random(250), 0, 0);
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                    AddAction(BestActions, aia_Up, aim_release, ap.Angle, 0, 0)
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                    end else if ap.Angle < 0 then
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                    begin
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                    AddAction(BestActions, aia_Down, aim_push, 300 + random(250), 0, 0);
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                    AddAction(BestActions, aia_Down, aim_release, -ap.Angle, 0, 0)
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                    end
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                 end;
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              if (Ammoz[a].Ammo.Propz and ammoprop_NeedTarget) <> 0 then
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                 begin
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                 AddAction(BestActions, aia_Put, 0, 1, ap.AttackPutX, ap.AttackPutY)
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                 end;
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              if (Ammoz[a].Ammo.Propz and ammoprop_AttackingPut) = 0 then
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                 begin
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                 AddAction(BestActions, aia_attack, aim_push, 650 + random(300), 0, 0);
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                 AddAction(BestActions, aia_attack, aim_release, ap.Power, 0, 0);
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                 end;
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              if ap.ExplR > 0 then
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                 AddAction(BestActions, aia_AwareExpl, ap.ExplR, 10, ap.ExplX, ap.ExplY);
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              end
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           end;
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        if a = High(TAmmoType) then a:= Low(TAmmoType)
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                               else inc(a)
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       until (a = aa) or
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             (CurrentHedgehog^.MultiShootAttacks > 0) or // shooting same weapon
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             StopThinking
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       end
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end;
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procedure Walk(Me: PGear; var Actions: TActions);
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const FallPixForBranching = cHHRadius * 2 + 8;
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var
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    ticks, maxticks, steps, tmp: Longword;
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    BaseRate, BestRate, Rate: integer;
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    GoInfo: TGoInfo;
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    CanGo: boolean;
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    AltMe: TGear;
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    BotLevel: Byte;
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    a: TAmmoType;
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begin
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ticks:= 0; // avoid compiler hint
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Stack.Count:= 0;
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for a:= Low(TAmmoType) to High(TAmmoType) do
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    CanUseAmmo[a]:= Assigned(AmmoTests[a].proc) and HHHasAmmo(Me^.Hedgehog^, a);
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BotLevel:= Me^.Hedgehog^.BotLevel;
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tmp:= random(2) + 1;
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Push(0, Actions, Me^, tmp);
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Push(0, Actions, Me^, tmp xor 3);
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if (Me^.State and gstAttacked) = 0 then maxticks:= Max(0, TurnTimeLeft - 5000 - LongWord(4000 * BotLevel))
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                                   else maxticks:= TurnTimeLeft;
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if (Me^.State and gstAttacked) = 0 then TestAmmos(Actions, Me, false);
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BestRate:= RatePlace(Me);
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BaseRate:= Max(BestRate, 0);
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if (Ammoz[Me^.Hedgehog^.CurAmmoType].Ammo.Propz and ammoprop_NeedTarget) <> 0 then
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    AddAction(Actions, aia_Weapon, Longword(amNothing), 100 + random(200), 0, 0);
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while (Stack.Count > 0) and (not StopThinking) and (GameFlags and gfArtillery = 0) do
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    begin
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    Pop(ticks, Actions, Me^);
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    AddAction(Actions, Me^.Message, aim_push, 250, 0, 0);
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    if (Me^.Message and gmLeft) <> 0 then AddAction(Actions, aia_WaitXL, hwRound(Me^.X), 0, 0, 0)
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                                      else AddAction(Actions, aia_WaitXR, hwRound(Me^.X), 0, 0, 0);
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    steps:= 0;
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    while (not StopThinking) do
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       begin
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{$HINTS OFF}
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       CanGo:= HHGo(Me, @AltMe, GoInfo);
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{$HINTS ON}
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       inc(ticks, GoInfo.Ticks);
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       if ticks > maxticks then break;
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       if (BotLevel < 5) and (GoInfo.JumpType = jmpHJump) then // hjump support
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          if Push(ticks, Actions, AltMe, Me^.Message) then
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             with Stack.States[Pred(Stack.Count)] do
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                  begin
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                  if Me^.dX.isNegative then AddAction(MadeActions, aia_LookRight, 0, 200, 0, 0)
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                                       else AddAction(MadeActions, aia_LookLeft, 0, 200, 0, 0);
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                  AddAction(MadeActions, aia_HJump, 0, 305 + random(50), 0, 0);
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                  AddAction(MadeActions, aia_HJump, 0, 350, 0, 0);
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                  if Me^.dX.isNegative then AddAction(MadeActions, aia_LookLeft, 0, 200, 0, 0)
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                                       else AddAction(MadeActions, aia_LookRight, 0, 200, 0, 0);
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                  end;
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       if (BotLevel < 3) and (GoInfo.JumpType = jmpLJump) then // ljump support
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          if Push(ticks, Actions, AltMe, Me^.Message) then
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             with Stack.States[Pred(Stack.Count)] do
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                  AddAction(MadeActions, aia_LJump, 0, 305 + random(50), 0, 0);
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       if not CanGo then break;
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       inc(steps);
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       Actions.actions[Pred(Actions.Count)].Param:= hwRound(Me^.X);
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       Rate:= RatePlace(Me);
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       if Rate > BestRate then
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          begin
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          BestActions:= Actions;
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          BestActions.isWalkingToABetterPlace:= true;
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          BestRate:= Rate;
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          Me^.State:= Me^.State or gstAttacked // we have better place, go there and do not use ammo
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          end
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       else if Rate < BestRate then break;
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       if ((Me^.State and gstAttacked) = 0)
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           and ((steps mod 4) = 0) then TestAmmos(Actions, Me, true);
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       if GoInfo.FallPix >= FallPixForBranching then
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          Push(ticks, Actions, Me^, Me^.Message xor 3); // aia_Left xor 3 = aia_Right
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       end;
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    if BestRate > BaseRate then exit
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    end
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end;
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function Think(Me: Pointer): ptrint;
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var BackMe, WalkMe: TGear;
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    StartTicks, currHedgehogIndex, itHedgehog, switchesNum, i: Longword;
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    switchImmediatelyAvailable, switchAvailable: boolean;
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    Actions: TActions;
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begin
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InterlockedIncrement(hasThread);
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StartTicks:= GameTicks;
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currHedgehogIndex:= CurrentTeam^.CurrHedgehog;
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itHedgehog:= currHedgehogIndex;
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switchesNum:= 0;
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switchImmediatelyAvailable:= (CurAmmoGear <> nil) and (CurAmmoGear^.Kind = gtSwitcher);
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switchAvailable:= HHHasAmmo(PGear(Me)^.Hedgehog^, amSwitch);
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if (PGear(Me)^.State and gstAttacked) = 0 then
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   if Targets.Count > 0 then
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      begin
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        // iterate over current team hedgehogs
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        repeat
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            WalkMe:= CurrentTeam^.Hedgehogs[itHedgehog].Gear^;
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            Actions.Count:= 0;
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            Actions.Pos:= 0;
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            Actions.Score:= 0;
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            if switchesNum > 0 then
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                begin
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                if not switchImmediatelyAvailable then
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                    begin
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                    // when AI has to use switcher, make it cost smth
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                    Actions.Score:= -20000;
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                    AddAction(Actions, aia_Weapon, Longword(amSwitch), 300 + random(200), 0, 0);                    
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                    AddAction(Actions, aia_attack, aim_push, 300 + random(300), 0, 0);
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                    AddAction(Actions, aia_attack, aim_release, 1, 0, 0);
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                    end;
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                for i:= 1 to switchesNum do
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                    AddAction(Actions, aia_Switch, 0, 300 + random(200), 0, 0);
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                end;
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            Walk(@WalkMe, Actions);
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            // find another hog in team
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            repeat
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                itHedgehog:= Succ(itHedgehog) mod CurrentTeam^.HedgehogsNumber;
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            until (itHedgehog = currHedgehogIndex) or (CurrentTeam^.Hedgehogs[itHedgehog].Gear <> nil);
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   314
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            inc(switchesNum);
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        until (not (switchImmediatelyAvailable or switchAvailable))
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            or StopThinking 
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            or (itHedgehog = currHedgehogIndex)
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            or BestActions.isWalkingToABetterPlace;
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        if (StartTicks > GameTicks - 1500) and (not StopThinking) then SDL_Delay(1000);
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        if (BestActions.Score < -1023) and (not BestActions.isWalkingToABetterPlace) then
6393
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            begin
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            BestActions.Count:= 0;
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            AddAction(BestActions, aia_Skip, 0, 250, 0, 0);
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            end;
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3c3dc6a148ca - Fixed bug with hedgehog under water using rope
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      end else
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42257fee61ae - Unicode support for team and hedgehogs names
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else begin
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    BackMe:= PGear(Me)^;
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    while (not StopThinking) and (BestActions.Count = 0) do
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        begin
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        FillBonuses(true);
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        WalkMe:= BackMe;
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        Actions.Count:= 0;
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        Actions.Pos:= 0;
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        Actions.Score:= 0;
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        Walk(@WalkMe, Actions);
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        if not StopThinking then SDL_Delay(100)
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        end
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    end;
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d9b140e9d2c2 Use freepascal's routines to manipulate threads
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PGear(Me)^.State:= PGear(Me)^.State and not gstHHThinking;
509
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Think:= 0;
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InterlockedDecrement(hasThread)
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end;
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procedure StartThink(Me: PGear);
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begin
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ec26095f1bed - Get rid of ammoProp_AttackInFall and gstFalling
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if ((Me^.State and (gstAttacking or gstHHJumping or gstMoving)) <> 0)
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c336ed82e76d Fix bugs:
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   or isInMultiShoot then exit;
506
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//DeleteCI(Me); // this might break demo
369
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Me^.State:= Me^.State or gstHHThinking;
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Me^.Message:= 0;
509
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BestActions.Count:= 0;
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BestActions.Pos:= 0;
5163
1620a02d5282 Fix test for water in airstrike handler
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BestActions.Score:= Low(LongInt);
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BestActions.isWalkingToABetterPlace:= false;
509
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StopThinking:= false;
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ThinkingHH:= Me;
509
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FillTargets;
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if Targets.Count = 0 then
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   begin
369
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   OutError('AI: no targets!?', false);
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   exit
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   371
   end;
941
b5222ddafe1f - Fix bug with picking up ammos from cases, when total ammo count may become more than AMMO_INFINITE
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369
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FillBonuses((Me^.State and gstAttacked) <> 0);
4900
8ad0e23e6d63 addfilelog <3 debugfile
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AddFileLog('Enter Think Thread');
6460
e3cc8ec51cd3 added a switch USE_SDLTHREADS
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{$IFDEF USE_SDLTHREADS}
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ThinkThread := SDL_CreateThread(@Think{$IFDEF SDL13}, nil{$ENDIF}, Me);
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   377
{$ELSE}
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302408e45052 code working on ios now
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   378
BeginThread(@Think, Me, ThinkThread);
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{$ENDIF}
5504
96d735b83d43 AI thread is now an SDL_Thread rather than pthread
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   380
AddFileLog('Thread started');
433
9f8f22094c0e AI thinks in separate thread
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end;
191
a03c2d037e24 Bots are in the same thread as game. Fixes FreePascal issues.
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   382
433
9f8f22094c0e AI thinks in separate thread
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   383
procedure ProcessBot;
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   384
const StartTicks: Longword = 0;
509
fd58135a4407 Bots know shotgun behavior better
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   385
      cStopThinkTime = 40;
4
bcbd7adb4e4b - set svn:eol-style to native
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   386
begin
602
f7628ebfccde Add CurrentHedgehog variable which simplifies code
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   387
with CurrentHedgehog^ do
66
9643d75baf1e Many AI improvements, bots do think in separate thread
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   388
     if (Gear <> nil)
369
2aed85310727 AI compiles, but doesn't work
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diff changeset
   389
        and ((Gear^.State and gstHHDriven) <> 0)
4225
ce9e2b05e9c1 Revert yet again for breaking stuff. No more chances on this. If there'd been a release, this would have been twice with serious breakage. P.S. - as per koda's complaint last time, only reverted the non-iphone, probably means iphone is now broken. Oh well.
nemo
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        and (TurnTimeLeft < cHedgehogTurnTime - 50) then
433
9f8f22094c0e AI thinks in separate thread
unc0rr
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diff changeset
   391
        if ((Gear^.State and gstHHThinking) = 0) then
509
fd58135a4407 Bots know shotgun behavior better
unc0rr
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diff changeset
   392
           if (BestActions.Pos >= BestActions.Count)
fd58135a4407 Bots know shotgun behavior better
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diff changeset
   393
              and (TurnTimeLeft > cStopThinkTime) then
433
9f8f22094c0e AI thinks in separate thread
unc0rr
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diff changeset
   394
              begin
936
ba582673db7d Fix 'AI may break demos playing' message while loading saves
unc0rr
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diff changeset
   395
              if Gear^.Message <> 0 then
ba582673db7d Fix 'AI may break demos playing' message while loading saves
unc0rr
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diff changeset
   396
                 begin
ba582673db7d Fix 'AI may break demos playing' message while loading saves
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   397
                 StopMessages(Gear^.Message);
ba582673db7d Fix 'AI may break demos playing' message while loading saves
unc0rr
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diff changeset
   398
                 TryDo((Gear^.Message and gmAllStoppable) = 0, 'Engine bug: AI may break demos playing', true);
ba582673db7d Fix 'AI may break demos playing' message while loading saves
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diff changeset
   399
                 end;
ba582673db7d Fix 'AI may break demos playing' message while loading saves
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diff changeset
   400
              if Gear^.Message <> 0 then exit;
433
9f8f22094c0e AI thinks in separate thread
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diff changeset
   401
              StartThink(Gear);
9f8f22094c0e AI thinks in separate thread
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diff changeset
   402
              StartTicks:= GameTicks
9f8f22094c0e AI thinks in separate thread
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diff changeset
   403
              end else ProcessAction(BestActions, Gear)
509
fd58135a4407 Bots know shotgun behavior better
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diff changeset
   404
        else if ((GameTicks - StartTicks) > cMaxAIThinkTime)
fd58135a4407 Bots know shotgun behavior better
unc0rr
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diff changeset
   405
                or (TurnTimeLeft <= cStopThinkTime) then StopThinking:= true
369
2aed85310727 AI compiles, but doesn't work
unc0rr
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diff changeset
   406
end;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
   407
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
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diff changeset
   408
procedure initModule;
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2695
diff changeset
   409
begin
2948
3f21a9dc93d0 Replace tabs with spaces using 'expand -t 4' command
unc0rr
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diff changeset
   410
    hasThread:= 0;
6025
cac1d5601d7c reviewed the build system and parts of the previous merge, performed some code cleanup
koda
parents: 5611
diff changeset
   411
    ThinkThread:= ThinkThread;
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2695
diff changeset
   412
end;
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2695
diff changeset
   413
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
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diff changeset
   414
procedure freeModule;
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2695
diff changeset
   415
begin
3617
1df21e06b8ba a couple of fixes i missed previously
koda
parents: 3615
diff changeset
   416
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2695
diff changeset
   417
end;
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2695
diff changeset
   418
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
   419
end.