(*

 * Hedgewars, a worms-like game

 * Copyright (c) 2004, 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

 *)

////////////////////////////////////////////////////////////////////////////////

procedure Attack(Gear: PGear);

var xx, yy: Double;

begin

with Gear^,

     PHedgehog(Gear.Hedgehog)^ do

     begin

     if ((State and gstHHDriven) <> 0)and

 //       (((State and gstAttacking) <> 0) or ((Message and gm_Attack) <> 0))and

        ((State and (gstAttacked or gstMoving or gstHHChooseTarget)) = 0)and

        (((State and gstFalling  ) = 0)or((Ammo[CurSlot, CurAmmo].Propz and ammoprop_AttackInFall) <> 0))and

        (((State and gstHHJumping) = 0)or((Ammo[CurSlot, CurAmmo].Propz and ammoprop_AttackInJump) <> 0))and

          ((TargetPoint.X <> NoPointX) or((Ammo[CurSlot, CurAmmo].Propz and ammoprop_NeedTarget) = 0)) then

        begin

        State:= State or gstAttacking;

        if Power = cMaxPower then Message:= Message and not gm_Attack

        else if (Ammo[CurSlot, CurAmmo].Propz and ammoprop_Power) = 0 then Message:= Message and not gm_Attack

        else begin

             if Power = 0 then

                begin

                AttackBar:= CurrentTeam.AttackBar;

                PlaySound(sndThrowPowerUp)

                end;

             inc(Power)

             end;

        if ((Message and gm_Attack) <> 0) then exit;

        if (Ammo[CurSlot, CurAmmo].Propz and ammoprop_Power) <> 0 then

           begin

           StopSound(sndThrowPowerUp);

           PlaySound(sndThrowRelease);

           end;

        xx:= hwSign(dX)*Sin(Angle*pi/cMaxAngle);

        yy:= -Cos(Angle*pi/cMaxAngle);

             case Ammo[CurSlot, CurAmmo].AmmoType of

                      amGrenade: FollowGear:= AddGear(round(X), round(Y), gtAmmo_Bomb,    0, xx*Power/cPowerDivisor, yy*Power/cPowerDivisor, Ammo[CurSlot, CurAmmo].Timer);

                  amClusterBomb: FollowGear:= AddGear(round(X), round(Y), gtClusterBomb,  0, xx*Power/cPowerDivisor, yy*Power/cPowerDivisor, Ammo[CurSlot, CurAmmo].Timer);

                      amBazooka: FollowGear:= AddGear(round(X), round(Y), gtAmmo_Grenade, 0, xx*Power/cPowerDivisor, yy*Power/cPowerDivisor);

                          amUFO: FollowGear:= AddGear(round(X), round(Y), gtUFO,          0, xx*Power/cPowerDivisor, yy*Power/cPowerDivisor);

                      amShotgun: begin

                                 PlaySound(sndShotgunReload);

                                 CurAmmoGear:= AddGear(round(X), round(Y), gtShotgunShot,  0, xx * 0.5, yy * 0.5);

                                 end;

                   amPickHammer: CurAmmoGear:= AddGear(round(Gear.X), round(Gear.Y) + cHHRadius, gtPickHammer, 0);

                         amSkip: TurnTimeLeft:= 0;

                         amRope: CurAmmoGear:= AddGear(round(Gear.X), round(Gear.Y), gtRope, 0, xx, yy);

                         amMine: AddGear(round(X) + hwSign(dX) * 7, round(Y), gtMine, 0, hwSign(dX) * 0.02, 0, 3000);

                       amDEagle: AddGear(round(X), round(Y), gtDEagleShot, 0, xx * 0.5, yy * 0.5);

                     amDynamite: AddGear(round(X) + hwSign(dX) * 7, round(Y), gtDynamite, 0, hwSign(dX) * 0.035, 0, 5000);

                  amBaseballBat: AddGear(round(X) + hwSign(dX) * 10, round(Y), gtShover, 0, xx * 0.5, yy * 0.5).Radius:= 20;

                    amFirePunch: CurAmmoGear:= AddGear(round(X) + hwSign(dX) * 10, round(Y), gtFirePunch, 0);

                    amParachute: CurAmmoGear:= AddGear(round(X), round(Y), gtParachute, 0);

                    amAirAttack: AddGear(0, 0, gtAirAttack, 0);

                   amMineStrike: AddGear(0, 0, gtAirAttack, 1);

                    amBlowTorch: CurAmmoGear:= AddGear(round(Gear.X), round(Gear.Y), gtBlowTorch, 0, hwSign(Gear.dX) * 0.5);

                  end;

        Power:= 0;

        if CurAmmoGear <> nil then

           begin

           Message:= Message or gm_Attack;

           CurAmmoGear.Message:= Message

           end else begin

           if not CurrentTeam.ExtDriven and

             ((Ammo[CurSlot, CurAmmo].Propz and ammoprop_Power) <> 0) then SendIPC('a');

           AfterAttack

           end

        end else Message:= Message and not gm_Attack

     end

end;

procedure AfterAttack;

begin

with CurrentTeam.Hedgehogs[CurrentTeam.CurrHedgehog].Gear^,

     CurrentTeam.Hedgehogs[CurrentTeam.CurrHedgehog] do

     begin

        Inc(AttacksNum);

        State:= State and not gstAttacking;

        if Ammo[CurSlot, CurAmmo].NumPerTurn >= AttacksNum then isInMultiShoot:= true

           else begin

           TurnTimeLeft:= Ammoz[Ammo[CurSlot, CurAmmo].AmmoType].TimeAfterTurn;

           State:= State or gstAttacked;

           OnUsedAmmo(Ammo)

           end;

     AttackBar:= 0;

     end

end;

////////////////////////////////////////////////////////////////////////////////

procedure PickUp(HH, Gear: PGear);

var s: shortstring;

    a: TAmmoType;

begin

Gear.Message:= gm_Destroy;

case Gear.Pos of

       posCaseAmmo: begin

                    a:= TAmmoType(Gear.State);

                    AddAmmo(PHedgehog(HH.Hedgehog), a);

                    s:= trammo[Ammoz[a].NameId];

                    AddCaption(s, PHedgehog(HH.Hedgehog).Team.Color, capgrpAmmoinfo);

                    end;

     posCaseHealth: begin

                    inc(HH.Health, Gear.Health);

                    str(Gear.Health, s);

                    s:= '+' + s;

                    AddCaption(s, PHedgehog(HH.Hedgehog).Team.Color, capgrpAmmoinfo);

                    RenderHealth(PHedgehog(HH.Hedgehog)^);

                    RecountTeamHealth(PHedgehog(HH.Hedgehog)^.Team)

                    end;

     end;

end;

const StepTicks: LongWord = 0;

procedure HedgehogStep(Gear: PGear);

var PrevdX: integer;

begin

if ((Gear.State and (gstAttacking or gstMoving or gstFalling)) = 0) then

   begin

   if ((Gear.Message and gm_LJump ) <> 0) then

      begin

      Gear.Message:= 0;

      if not TestCollisionYwithGear(Gear, -1) then

         if not TestCollisionXwithXYShift(Gear, 0, -2, hwSign(Gear.dX)) then Gear.Y:= Gear.Y - 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:= hwSign(Gear.dX) * 0.15;

         Gear.State:= Gear.State or gstFalling or gstHHJumping;

         exit

         end;

      end;

   if ((Gear.Message and gm_HJump ) <> 0) then

      begin

      Gear.Message:= 0;

      if not TestCollisionYwithGear(Gear, -1) then

         begin

         Gear.dY:= -0.20;

         Gear.dX:= 0.0000001 * hwSign(Gear.dX);

         Gear.X:= Gear.X - hwSign(Gear.dX)*0.00008; // shift compensation

         Gear.State:= Gear.State or gstFalling or gstHHJumping;

         exit

         end;

      end;

   PrevdX:= hwSign(Gear.dX);

   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;

   StepTicks:= cHHStepTicks;

   if PrevdX <> hwSign(Gear.dX) then exit;

   PHedgehog(Gear.Hedgehog).visStepPos:= (PHedgehog(Gear.Hedgehog).visStepPos + 1) and 7;

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

   SetAllHHToActive;

   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 gstFalling

      end;

   end

   end

   end

   end

   end

   end

   end

end;

procedure HedgehogChAngle(Gear: PGear);

begin

if ((Gear.State and (gstMoving or gstFalling)) = 0) then

   if (Gear.Message and gm_Up    )<>0 then if Gear.Angle > CurMinAngle then dec(Gear.Angle)

   else else

   if (Gear.Message and gm_Down  )<>0 then if Gear.Angle < CurMaxAngle then inc(Gear.Angle);

end;

procedure doStepHedgehog(Gear: PGear); forward;

////////////////////////////////////////////////////////////////////////////////

procedure doStepHedgehogDriven(Gear: PGear);

var t: PGear;

begin

if isInMultiShoot and (Gear.Damage = 0) then

   begin

   exit

   end;

AllInactive:= false;

DeleteCI(Gear);

if (TurnTimeLeft = 0) or (Gear.Damage > 0) then

   begin

   TurnTimeLeft:= 0;

   Gear.State:= Gear.State and not gstHHDriven;

   if Gear.Damage > 0 then

      Gear.State:= Gear.State and not gstHHJumping;

   exit

   end;

if ((Gear.State and gstFalling) <> 0) or (StepTicks = cHHStepTicks)

   or (CurAmmoGear <> nil) then // we're moving

   begin

   // check for case with ammo

   t:= CheckGearNear(Gear, gtCase, 36, 36);

   if t <> nil then

      PickUp(Gear, t)

   end;

if CurAmmoGear <> nil then

   begin

   CurAmmoGear.Message:= Gear.Message;

   exit

   end;

if ((Gear.Message and gm_Attack) <> 0) or

   ((Gear.State and gstAttacking) <> 0)then Attack(Gear);

if (Gear.State and gstFalling) <> 0 then

   begin

   // it could be the source to trick: double-backspace jump -> vertical wall

   // collision - > (abs(Gear.dX) < 0.0000002) -> backspace -> even more high jump

   if ((Gear.Message and gm_HJump) <> 0) and ((Gear.State and gstHHJumping) <> 0) then

      if (abs(Gear.dX) < 2 * cLittle) and (Gear.dY < -0.02) then

         begin

         Gear.dY:= -0.25;

         Gear.dX:= hwSign(Gear.dX) * 0.02

         end;

   Gear.Message:= Gear.Message and not (gm_LJump or gm_HJump);     

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

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

   Gear.dY:= Gear.dY + cGravity;

   if (Gear.dY < 0)and TestCollisionYwithGear(Gear, -1) then Gear.dY:= 0;

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

   if (Gear.dY >= 0)and TestCollisionYwithGear(Gear, 1) then

      begin

      CheckHHDamage(Gear);

      if ((abs(Gear.dX) + abs(Gear.dY)) < 0.55)

         and ((Gear.State and gstHHJumping) <> 0) then SetLittle(Gear.dX);

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

      StepTicks:= 300; 

      Gear.dY:= 0

      end;

   CheckGearDrowning(Gear);

   exit

   end ;//else if Gear.CollIndex = High(Longword) then AddIntersectorsCR(Gear);

   HedgehogChAngle(Gear);

   if StepTicks > 0 then dec(StepTicks);

   if (StepTicks = 0) then HedgehogStep(Gear)

end;

////////////////////////////////////////////////////////////////////////////////

procedure doStepHedgehogFree(Gear: PGear);

begin

//DeleteCI(Gear);

if not TestCollisionYwithGear(Gear, 1) then

   begin

   if (Gear.dY < 0) and TestCollisionYwithGear(Gear, -1) then Gear.dY:= 0;

   Gear.State:= Gear.State or gstFalling or gstMoving;

   Gear.dY:= Gear.dY + cGravity

   end else begin

   CheckHHDamage(Gear);

   if ((abs(Gear.dX) + abs(Gear.dY)) < 0.55)

      and ((Gear.State and gstHHJumping) <> 0) then SetLittle(Gear.dX);

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

   if Gear.dY > 0 then Gear.dY:= 0;

   if ((Gear.State and gstMoving) <> 0) then Gear.dX:= Gear.dX * Gear.Friction

   end;

if (Gear.State <> 0) then DeleteCI(Gear);

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

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

      if ((Gear.State and gstFalling) = 0) then

         if abs(Gear.dX) > 0.01 then

            if not TestCollisionXwithXYShift(Gear, hwSign(Gear.dX) - Gear.dX, -1, hwSign(Gear.dX)) then begin Gear.X:= Gear.X + Gear.dX; Gear.dX:= Gear.dX * 0.96; Gear.Y:= Gear.Y - 1 end else

            if not TestCollisionXwithXYShift(Gear, hwSign(Gear.dX) - Gear.dX, -2, hwSign(Gear.dX)) then begin Gear.X:= Gear.X + Gear.dX; Gear.dX:= Gear.dX * 0.93; Gear.Y:= Gear.Y - 2 end else

            if not TestCollisionXwithXYShift(Gear, hwSign(Gear.dX) - Gear.dX, -3, hwSign(Gear.dX)) then begin Gear.X:= Gear.X + Gear.dX; Gear.dX:= Gear.dX * 0.90; Gear.Y:= Gear.Y - 3 end else

            if not TestCollisionXwithXYShift(Gear, hwSign(Gear.dX) - Gear.dX, -4, hwSign(Gear.dX)) then begin Gear.X:= Gear.X + Gear.dX; Gear.dX:= Gear.dX * 0.87; Gear.Y:= Gear.Y - 4 end else

            if not TestCollisionXwithXYShift(Gear, hwSign(Gear.dX) - Gear.dX, -5, hwSign(Gear.dX)) then begin Gear.X:= Gear.X + Gear.dX; Gear.dX:= Gear.dX * 0.84; Gear.Y:= Gear.Y - 5 end else

            if abs(Gear.dX) > 0.02 then Gear.dX:= -Gear.Elasticity * Gear.dX

                                   else begin

                                        Gear.State:= Gear.State and not gstMoving;

                                        SetLittle(Gear.dX)

                                        end

            else begin

                 Gear.State:= Gear.State and not gstMoving;

                 SetLittle(Gear.dX)

                 end

         else Gear.dX:= -Gear.Elasticity * Gear.dX;

if ((Gear.State and gstFalling) = 0)and

   (sqr(Gear.dX) + sqr(Gear.dY) < 0.0008) then

   begin

   Gear.State:= Gear.State and not gstMoving;

   SetLittle(Gear.dX);

   Gear.dY:= 0

   end else Gear.State:= Gear.State or gstMoving;

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

   begin

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

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

   if (Gear.dY > 0) and not TestCollisionYwithGear(Gear, 1) and TestCollisionYwithXYShift(Gear, 0, 1, 1) then

      begin

      CheckHHDamage(Gear);

      Gear.dY:= 0;

      Gear.Y:= Gear.Y + 1

      end;

   end else

   if Gear.Health = 0 then

      begin

      if AllInactive then

         begin

         doMakeExplosion(round(Gear.X), round(Gear.Y), 30, EXPLAutoSound);

         AddGear(round(Gear.X), round(Gear.Y), gtGrave, 0).Hedgehog:= Gear.Hedgehog;

         DeleteGear(Gear);

         SetAllToActive

         end;

      AllInactive:= false;  

      exit

      end;

AllInactive:= false;

if (not CheckGearDrowning(Gear)) and

   ((Gear.State and gstMoving) = 0) then

      begin

      Gear.State:= 0;

      Gear.Active:= false;

      AddGearCI(Gear);

      exit

      end

end;

////////////////////////////////////////////////////////////////////////////////

procedure doStepHedgehog(Gear: PGear);

begin

if (Gear.Message and gm_Destroy) <> 0 then

   begin

   DeleteGear(Gear);

   exit

   end;

if (Gear.State and gstHHDriven) = 0 then doStepHedgehogFree(Gear)

                                    else doStepHedgehogDriven(Gear)

end;