(*

 * 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 uAIMisc;

interface

uses SDLh, uConsts, uGears, uFloat;

type TTarget = record

               Point: TPoint;

               Score: LongInt;

               end;

     TTargets = record

                Count: Longword;

                ar: array[0..Pred(cMaxHHs)] of TTarget;

                end;

     TJumpType = (jmpNone, jmpHJump, jmpLJump);

     TGoInfo = record

               Ticks: Longword;

               FallPix: Longword;

               JumpType: TJumpType;

               end;

procedure init_uAIMisc;

procedure free_uAIMisc;

procedure FillTargets;

procedure FillBonuses(isAfterAttack: boolean);

procedure AwareOfExplosion(x, y, r: LongInt);

function RatePlace(Gear: PGear): LongInt;

function TestCollExcludingMe(Me: PGear; x, y, r: LongInt): boolean;

function TestColl(x, y, r: LongInt): boolean;

function RateExplosion(Me: PGear; x, y, r: LongInt): LongInt;

function RateShove(Me: PGear; x, y, r, power: LongInt): LongInt;

function RateShotgun(Me: PGear; x, y: LongInt): LongInt;

function HHGo(Gear, AltGear: PGear; var GoInfo: TGoInfo): boolean;

function AIrndSign(num: LongInt): LongInt;

var ThinkingHH: PGear;

    Targets: TTargets;

implementation

uses uTeams, uMisc, uLand, uCollisions;

type TBonus = record

              X, Y: LongInt;

              Radius: LongInt;

              Score: LongInt;

              end;

const KillScore = 200;

      MAXBONUS = 1024;

var friendlyfactor: LongInt = 300;

    KnownExplosion: record

                    X, Y, Radius: LongInt

                    end = (X: 0; Y: 0; Radius: 0);

    bonuses: record

             Count: Longword;

             ar: array[0..Pred(MAXBONUS)] of TBonus;

             end;

procedure FillTargets;

var i, t: Longword;

    f, e: Longword;

begin

Targets.Count:= 0;

f:= 0;

e:= 0;

for t:= 0 to Pred(TeamsCount) do

    with TeamsArray[t]^ do

        if not hasGone then

            begin

            for i:= 0 to cMaxHHIndex do

                if (Hedgehogs[i].Gear <> nil)

                and (Hedgehogs[i].Gear <> ThinkingHH) then

                    begin

                    with Targets.ar[Targets.Count], Hedgehogs[i] do

                        begin

                        Point.X:= hwRound(Gear^.X);

                        Point.Y:= hwRound(Gear^.Y);

                        if Clan <> CurrentTeam^.Clan then

                            begin

                            Score:=  Gear^.Health;

                            inc(e)

                            end else

                            begin

                            Score:= -Gear^.Health;

                            inc(f)

                            end

                        end;

                    inc(Targets.Count)

                    end;

            end;

if e > f then friendlyfactor:= 300 + (e - f) * 30

else friendlyfactor:= max(30, 300 - f * 80 div e)

end;

procedure FillBonuses(isAfterAttack: boolean);

var Gear: PGear;

    MyClan: PClan;

    procedure AddBonus(x, y: LongInt; r: Longword; s: LongInt);

    begin

    bonuses.ar[bonuses.Count].x:= x;

    bonuses.ar[bonuses.Count].y:= y;

    bonuses.ar[bonuses.Count].Radius:= r;

    bonuses.ar[bonuses.Count].Score:= s;

    inc(bonuses.Count);

    TryDo(bonuses.Count <= MAXBONUS, 'Bonuses overflow', true)

    end;

begin

bonuses.Count:= 0;

MyClan:= PHedgehog(ThinkingHH^.Hedgehog)^.Team^.Clan;

Gear:= GearsList;

while Gear <> nil do

    begin

    case Gear^.Kind of

        gtCase: AddBonus(hwRound(Gear^.X), hwRound(Gear^.Y), 33, 25);

        gtMine: if (Gear^.State and gstAttacking) = 0 then

                AddBonus(hwRound(Gear^.X), hwRound(Gear^.Y), 50, -50)

            else

                AddBonus(hwRound(Gear^.X), hwRound(Gear^.Y), 100, -50); // mine is on

        gtDynamite: AddBonus(hwRound(Gear^.X), hwRound(Gear^.Y), 150, -75);

        gtHedgehog: begin

                    if Gear^.Damage >= Gear^.Health then

                        AddBonus(hwRound(Gear^.X), hwRound(Gear^.Y), 60, -25)

                    else

                        if isAfterAttack and (ThinkingHH^.Hedgehog <> Gear^.Hedgehog) then

                            if (MyClan = PHedgehog(Gear^.Hedgehog)^.Team^.Clan) then

                                AddBonus(hwRound(Gear^.X), hwRound(Gear^.Y), 150, -3) // hedgehog-friend

                            else

                                AddBonus(hwRound(Gear^.X), hwRound(Gear^.Y), 100, 3)

                    end;

        end;

    Gear:= Gear^.NextGear

    end;

if isAfterAttack and (KnownExplosion.Radius > 0) then

   with KnownExplosion do

        AddBonus(X, Y, Radius + 10, -Radius);

end;

procedure AwareOfExplosion(x, y, r: LongInt);

begin

KnownExplosion.X:= x;

KnownExplosion.Y:= y;

KnownExplosion.Radius:= r

end;

function RatePlace(Gear: PGear): LongInt;

var i, r: LongInt;

    rate: LongInt;

begin

rate:= 0;

for i:= 0 to Pred(bonuses.Count) do

    with bonuses.ar[i] do

        begin

        r:= hwRound(Distance(Gear^.X - int2hwFloat(X), Gear^.Y - int2hwFloat(Y)));

        if r < Radius then

            inc(rate, Score * (Radius - r))

        end;

    RatePlace:= rate;

end;

// Wrapper to test various approaches.  If it works reasonably, will just replace.

// Right now, converting to hwFloat is a tad inefficient since the x/y were hwFloat to begin with...

function TestCollExcludingMe(Me: PGear; x, y, r: LongInt): boolean;

var MeX, MeY: LongInt;

begin

    if ((x and LAND_WIDTH_MASK) = 0) and ((y and LAND_HEIGHT_MASK) = 0) then

        begin

        MeX:= hwRound(Me^.X);

        MeY:= hwRound(Me^.Y);

        // We are still inside the hog. Skip radius test

        if ((((x-MeX)*(x-MeX)) + ((y-MeY)*(y-MeY))) < 256) and 

           ((Land[y, x] and $FF00) = 0) then exit(false);

        end;

    exit(TestColl(x, y, r))

end;

function TestColl(x, y, r: LongInt): boolean;

var b: boolean;

begin

b:= (((x-r) and LAND_WIDTH_MASK) = 0)and(((y-r) and LAND_HEIGHT_MASK) = 0) and (Land[y-r, x-r] <> 0);

if b then exit(true);

b:=(((x-r) and LAND_WIDTH_MASK) = 0)and(((y+r) and LAND_HEIGHT_MASK) = 0) and (Land[y+r, x-r] <> 0);

if b then exit(true);

b:=(((x+r) and LAND_WIDTH_MASK) = 0)and(((y-r) and LAND_HEIGHT_MASK) = 0) and (Land[y-r, x+r] <> 0);

if b then exit(true);

TestColl:=(((x+r) and LAND_WIDTH_MASK) = 0)and(((y+r) and LAND_HEIGHT_MASK) = 0) and (Land[y+r, x+r] <> 0)

end;

function RateExplosion(Me: PGear; x, y, r: LongInt): LongInt;

var i, dmg, rate: LongInt;

begin

rate:= 0;

// add our virtual position

with Targets.ar[Targets.Count] do

     begin

     Point.x:= hwRound(Me^.X);

     Point.y:= hwRound(Me^.Y);

     Score:= - ThinkingHH^.Health

     end;

// rate explosion

for i:= 0 to Targets.Count do

    with Targets.ar[i] do

         begin

         dmg:= r + cHHRadius div 2 - hwRound(DistanceI(Point.x - x, Point.y - y));

         if dmg > 0 then

            begin

            dmg:= min(dmg div 2, r);

            if dmg >= abs(Score) then

               if Score > 0 then inc(rate, KillScore)

                            else dec(rate, KillScore * friendlyfactor div 100)

            else

               if Score > 0 then inc(rate, dmg)

                            else dec(rate, dmg * friendlyfactor div 100)

            end;

         end;

RateExplosion:= rate * 1024;

end;

function RateShove(Me: PGear; x, y, r, power: LongInt): LongInt;

var i, dmg, rate: LongInt;

begin

rate:= 0;

for i:= 0 to Pred(Targets.Count) do

    with Targets.ar[i] do

         begin

         dmg:= r - hwRound(DistanceI(Point.x - x, Point.y - y));

         if dmg > 0 then

            begin

            if power >= abs(Score) then

               if Score > 0 then inc(rate, KillScore)

                            else dec(rate, KillScore * friendlyfactor div 100)

            else

               if Score > 0 then inc(rate, power)

                            else dec(rate, power * friendlyfactor div 100)

            end;

         end;

RateShove:= rate * 1024

end;

function RateShotgun(Me: PGear; x, y: LongInt): LongInt;

const

  REUSE_BONUS = 1.35;

var i, dmg, rate: LongInt;

begin

rate:= 0;

// add our virtual position

with Targets.ar[Targets.Count] do

     begin

     Point.x:= hwRound(Me^.X);

     Point.y:= hwRound(Me^.Y);

     Score:= - ThinkingHH^.Health

     end;

// rate shot

for i:= 0 to Targets.Count do

    with Targets.ar[i] do

         begin

         dmg:= min(cHHRadius + cShotgunRadius - hwRound(DistanceI(Point.x - x, Point.y - y)), 25);

         dmg := round(dmg * REUSE_BONUS);

         if dmg > 0 then

            begin

                if dmg >= abs(Score) then dmg := KillScore;

                if Score > 0 then inc(rate, dmg)

                else dec(rate, dmg * friendlyfactor div 100);

            end;

         end;

RateShotgun:= rate * 1024;

end;

function HHJump(Gear: PGear; JumpType: TJumpType; var GoInfo: TGoInfo): boolean;

var bX, bY: LongInt;

    bRes: boolean;

begin

bRes:= false;

GoInfo.Ticks:= 0;

GoInfo.FallPix:= 0;

GoInfo.JumpType:= jmpNone;

bX:= hwRound(Gear^.X);

bY:= hwRound(Gear^.Y);

case JumpType of

     jmpNone: exit(bRes);

    jmpHJump: if not TestCollisionYwithGear(Gear, -1) then

                 begin

                 Gear^.dY:= -_0_2;

                 SetLittle(Gear^.dX);

                 Gear^.State:= Gear^.State or gstMoving or gstHHJumping;

                 end else exit(bRes);

    jmpLJump: begin

              if not TestCollisionYwithGear(Gear, -1) then

                 if not TestCollisionXwithXYShift(Gear, _0, -2, hwSign(Gear^.dX)) then Gear^.Y:= Gear^.Y - int2hwFloat(2) else

                 if not TestCollisionXwithXYShift(Gear, _0, -1, hwSign(Gear^.dX)) then Gear^.Y:= Gear^.Y - _1;

              if not (TestCollisionXwithGear(Gear, hwSign(Gear^.dX))

                 or   TestCollisionYwithGear(Gear, -1)) then

                 begin

                 Gear^.dY:= -_0_15;

                 Gear^.dX:= SignAs(_0_15, Gear^.dX);

                 Gear^.State:= Gear^.State or gstMoving or gstHHJumping

                 end else exit(bRes)

              end

    end;

repeat

if not (hwRound(Gear^.Y) + cHHRadius < cWaterLine) then exit(bRes);

if (Gear^.State and gstMoving) <> 0 then

   begin

   if (GoInfo.Ticks = 350) then

      if (not (hwAbs(Gear^.dX) > cLittle)) and (Gear^.dY < -_0_02) then

         begin

         Gear^.dY:= -_0_25;

         Gear^.dX:= SignAs(_0_02, Gear^.dX)

         end;

   if TestCollisionXwithGear(Gear, hwSign(Gear^.dX)) then SetLittle(Gear^.dX);

   Gear^.X:= Gear^.X + Gear^.dX;

   inc(GoInfo.Ticks);

   Gear^.dY:= Gear^.dY + cGravity;

   if Gear^.dY > _0_4 then exit(bRes);

   if (Gear^.dY.isNegative)and TestCollisionYwithGear(Gear, -1) then Gear^.dY:= _0;

   Gear^.Y:= Gear^.Y + Gear^.dY;

   if (not Gear^.dY.isNegative)and TestCollisionYwithGear(Gear, 1) then

      begin

      Gear^.State:= Gear^.State and not (gstMoving or gstHHJumping);

      Gear^.dY:= _0;

      case JumpType of

           jmpHJump: if bY - hwRound(Gear^.Y) > 5 then

                        begin

                        bRes:= true;

                        GoInfo.JumpType:= jmpHJump;

                        inc(GoInfo.Ticks, 300 + 300) // 300 before jump, 300 after

                        end;

           jmpLJump: if abs(bX - hwRound(Gear^.X)) > 30 then

                        begin

                        bRes:= true;

                        GoInfo.JumpType:= jmpLJump;

                        inc(GoInfo.Ticks, 300 + 300) // 300 before jump, 300 after

                        end;

           end;

      exit(bRes)

      end;

   end;

until false

end;

function HHGo(Gear, AltGear: PGear; var GoInfo: TGoInfo): boolean;

var pX, pY: LongInt;

    bRes: boolean;

begin

bRes:= false;

AltGear^:= Gear^;

GoInfo.Ticks:= 0;

GoInfo.FallPix:= 0;

GoInfo.JumpType:= jmpNone;

repeat

pX:= hwRound(Gear^.X);

pY:= hwRound(Gear^.Y);

if pY + cHHRadius >= cWaterLine then exit(false);

if (Gear^.State and gstMoving) <> 0 then

   begin

   inc(GoInfo.Ticks);

   Gear^.dY:= Gear^.dY + cGravity;

   if Gear^.dY > _0_4 then

      begin

      Goinfo.FallPix:= 0;

      HHJump(AltGear, jmpLJump, GoInfo); // try ljump instead of fall with damage

      exit(bRes)

      end;

   Gear^.Y:= Gear^.Y + Gear^.dY;

   if hwRound(Gear^.Y) > pY then inc(GoInfo.FallPix);

   if TestCollisionYwithGear(Gear, 1) then

      begin

      inc(GoInfo.Ticks, 410);

      Gear^.State:= Gear^.State and not (gstMoving or gstHHJumping);

      Gear^.dY:= _0;

      bRes:= true;

      HHJump(AltGear, jmpLJump, GoInfo); // try ljump instead of fall

      exit(bRes)

      end;

   continue

   end;

   if (Gear^.Message and gm_Left  )<>0 then Gear^.dX:= -cLittle else

   if (Gear^.Message and gm_Right )<>0 then Gear^.dX:=  cLittle else exit(bRes);

   if TestCollisionXwithGear(Gear, hwSign(Gear^.dX)) then

      begin

      if not (TestCollisionXwithXYShift(Gear, _0, -6, hwSign(Gear^.dX))

         or TestCollisionYwithGear(Gear, -1)) then Gear^.Y:= Gear^.Y - _1;

      if not (TestCollisionXwithXYShift(Gear, _0, -5, hwSign(Gear^.dX))

         or TestCollisionYwithGear(Gear, -1)) then Gear^.Y:= Gear^.Y - _1;

      if not (TestCollisionXwithXYShift(Gear, _0, -4, hwSign(Gear^.dX))

         or TestCollisionYwithGear(Gear, -1)) then Gear^.Y:= Gear^.Y - _1;

      if not (TestCollisionXwithXYShift(Gear, _0, -3, hwSign(Gear^.dX))

         or TestCollisionYwithGear(Gear, -1)) then Gear^.Y:= Gear^.Y - _1;

      if not (TestCollisionXwithXYShift(Gear, _0, -2, hwSign(Gear^.dX))

         or TestCollisionYwithGear(Gear, -1)) then Gear^.Y:= Gear^.Y - _1;

      if not (TestCollisionXwithXYShift(Gear, _0, -1, hwSign(Gear^.dX))

         or TestCollisionYwithGear(Gear, -1)) then Gear^.Y:= Gear^.Y - _1;

      end;

   if not TestCollisionXwithGear(Gear, hwSign(Gear^.dX)) then

      begin

      Gear^.X:= Gear^.X + int2hwFloat(hwSign(Gear^.dX));

      inc(GoInfo.Ticks, cHHStepTicks)

      end;

   if not TestCollisionYwithGear(Gear, 1) then

   begin

   Gear^.Y:= Gear^.Y + _1;

   if not TestCollisionYwithGear(Gear, 1) then

   begin

   Gear^.Y:= Gear^.Y + _1;

   if not TestCollisionYwithGear(Gear, 1) then

   begin

   Gear^.Y:= Gear^.Y + _1;

   if not TestCollisionYwithGear(Gear, 1) then

   begin

   Gear^.Y:= Gear^.Y + _1;

   if not TestCollisionYwithGear(Gear, 1) then

   begin

   Gear^.Y:= Gear^.Y + _1;

   if not TestCollisionYwithGear(Gear, 1) then

   begin

   Gear^.Y:= Gear^.Y + _1;

   if not TestCollisionYwithGear(Gear, 1) then

      begin

      Gear^.Y:= Gear^.Y - _6;

      Gear^.dY:= _0;

      Gear^.State:= Gear^.State or gstMoving

      end

   end

   end

   end

   end

   end

   end;

if (pX <> hwRound(Gear^.X)) and ((Gear^.State and gstMoving) = 0) then

   exit(true);

until (pX = hwRound(Gear^.X)) and (pY = hwRound(Gear^.Y)) and ((Gear^.State and gstMoving) = 0);

HHJump(AltGear, jmpHJump, GoInfo);

HHGo:= bRes;

end;

function AIrndSign(num: LongInt): LongInt;

begin

if random(2) = 0 then AIrndSign:=   num

                 else AIrndSign:= - num

end;

procedure init_uAIMisc;

begin

    friendlyfactor:= 300;

    KnownExplosion.X:= 0;

    KnownExplosion.Y:= 0;

    KnownExplosion.Radius:= 0;

end;

procedure free_uAIMisc;

begin

end;