(*

 * 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 uAIMisc;

interface

uses SDLh, uConsts, uGears;

{$INCLUDE options.inc}

type TTarget = record

               Point: TPoint;

               Score: integer;

               end;

     TTargets = record

                Count: Longword;

                ar: array[0..cMaxHHIndex*5] of TTarget;

                end;

     TJumpType = (jmpNone, jmpHJump, jmpLJump);

     TGoInfo = record

               Ticks: Longword;

               FallPix: Longword;

               JumpType: TJumpType;

               end;

procedure FillTargets;

procedure FillBonuses(isAfterAttack: boolean);

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

function RatePlace(Gear: PGear): integer;

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

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

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

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

function rndSign(num: integer): integer;

var ThinkingHH: PGear;

    Targets: TTargets;

implementation

uses uTeams, uMisc, uLand, uCollisions;

const KillScore = 200;

      MAXBONUS = 1024;

type TBonus = record

              X, Y: integer;

              Radius: integer;

              Score: integer;

              end;

var bonuses: record

             Count: Longword;

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

             end;

    KnownExplosion: record

                    X, Y, Radius: integer

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

procedure FillTargets;

var t: PTeam;

    i: Longword;

begin

Targets.Count:= 0;

t:= TeamsList;

while t <> nil do

      begin

      for i:= 0 to cMaxHHIndex do

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

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

             begin

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

                  begin

                  Point.X:= Round(Gear.X);

                  Point.Y:= Round(Gear.Y);

                  if t.Color <> CurrentTeam.Color then Score:=  Gear.Health

                                                  else Score:= -Gear.Health

                  end;

             inc(Targets.Count)

             end;

      t:= t.Next

      end

end;

procedure FillBonuses(isAfterAttack: boolean);

var Gear: PGear;

    MyColor: Longword;

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

    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;

MyColor:= PHedgehog(ThinkingHH.Hedgehog).Team.Color;

Gear:= GearsList;

while Gear <> nil do

      begin

      case Gear.Kind of

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

           gtMine: if (Gear.State and gstAttacking) = 0 then AddBonus(round(Gear.X), round(Gear.Y), 50, -50)

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

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

           gtHedgehog: begin

                       if Gear.Damage >= Gear.Health then AddBonus(round(Gear.X), round(Gear.Y), 60, -25) else

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

                             if (MyColor = PHedgehog(Gear.Hedgehog).Team.Color) then AddBonus(round(Gear.X), round(Gear.Y), 150, -3) // hedgehog-friend

                                                                                else AddBonus(round(Gear.X), round(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: integer);

begin

KnownExplosion.X:= x;

KnownExplosion.Y:= y;

KnownExplosion.Radius:= r

end;

function RatePlace(Gear: PGear): integer;

var i, r: integer;

begin

Result:= 0;

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

    with bonuses.ar[i] do

         begin

         r:= round(sqrt(sqr(Gear.X - X) + sqr(Gear.Y - y)));

         if r < Radius then

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

         end;

end;

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

begin

Result:=(((x-r) and $FFFFF800) = 0)and(((y-r) and $FFFFFC00) = 0) and (Land[y-r, x-r] <> 0);

if Result then exit;

Result:=(((x-r) and $FFFFF800) = 0)and(((y+r) and $FFFFFC00) = 0) and (Land[y+r, x-r] <> 0);

if Result then exit;

Result:=(((x+r) and $FFFFF800) = 0)and(((y-r) and $FFFFFC00) = 0) and (Land[y-r, x+r] <> 0);

if Result then exit;

Result:=(((x+r) and $FFFFF800) = 0)and(((y+r) and $FFFFFC00) = 0) and (Land[y+r, x+r] <> 0);

end;

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

var i, dmg: integer;

begin

Result:= 0;

// add our virtual position

with Targets.ar[Targets.Count] do

     begin

     Point.x:= round(Me.X);

     Point.y:= round(Me.Y);

     Score:= - ThinkingHH.Health

     end;

// rate explosion

for i:= 0 to Targets.Count do

    with Targets.ar[i] do

         begin

         dmg:= r - Round(sqrt(sqr(Point.x - x) + sqr(Point.y - y)));

         if dmg > 0 then

            begin

            dmg:= dmg shr 1;

            if dmg > abs(Score) then

               if Score > 0 then inc(Result, KillScore)

                            else dec(Result, KillScore * 3)

            else

               if Score > 0 then inc(Result, dmg)

                            else dec(Result, dmg * 3)

            end;

         end;

Result:= Result * 1024

end;

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

var i, dmg: integer;

begin

Result:= 0;

for i:= 0 to Targets.Count do

    with Targets.ar[i] do

         begin

         dmg:= r - Round(sqrt(sqr(Point.x - x) + sqr(Point.y - y)));

         if dmg > 0 then

            begin

            if power > abs(Score) then

               if Score > 0 then inc(Result, KillScore)

                            else dec(Result, KillScore * 3)

            else

               if Score > 0 then inc(Result, power)

                            else dec(Result, power * 3)

            end;

         end;

Result:= Result * 1024

end;

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

var bX, bY: integer;

begin

Result:= false;

GoInfo.Ticks:= 0;

GoInfo.FallPix:= 0;

GoInfo.JumpType:= jmpNone;

bX:= round(Gear.X);

bY:= round(Gear.Y);

case JumpType of

     jmpNone: exit;

    jmpHJump: 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;

                 end else exit;

    jmpLJump: begin

              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

                 end else exit

              end

    end;

repeat

if Gear.Y + cHHRadius >= cWaterLine then exit;

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

   begin

   if (GoInfo.Ticks = 350) then

      if (abs(Gear.dX) < 0.0000002) and (Gear.dY < -0.02) then

         begin

         Gear.dY:= -0.25;

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

         end;

   if TestCollisionXwithGear(Gear, hwSign(Gear.dX)) then Gear.dX:= 0.0000001 * hwSign(Gear.dX);

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

   inc(GoInfo.Ticks);

   Gear.dY:= Gear.dY + cGravity;

   if Gear.dY > 0.40 then exit;

   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

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

      Gear.dY:= 0;

      case JumpType of

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

                        begin

                        Result:= true;

                        GoInfo.JumpType:= jmpHJump;

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

                        end;

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

                        begin

                        Result:= true;

                        GoInfo.JumpType:= jmpLJump;

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

                        end;

           end;

      exit

      end;

   end;

until false;

end;

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

var pX, pY: integer;

begin

Result:= false;

AltGear^:= Gear^;

GoInfo.Ticks:= 0;

GoInfo.FallPix:= 0;

GoInfo.JumpType:= jmpNone;

repeat

pX:= round(Gear.X);

pY:= round(Gear.Y);

if pY + cHHRadius >= cWaterLine then exit;

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

   begin

   inc(GoInfo.Ticks);

   Gear.dY:= Gear.dY + cGravity;

   if Gear.dY > 0.40 then

      begin

      Goinfo.FallPix:= 0;

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

      exit

      end;

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

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

   if TestCollisionYwithGear(Gear, 1) then

      begin

      inc(GoInfo.Ticks, 300);

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

      Gear.dY:= 0;

      Result:= true;

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

      exit

      end;

   continue

   end;

   if (Gear.Message and gm_Left  )<>0 then Gear.dX:= -1.0 else

   if (Gear.Message and gm_Right )<>0 then Gear.dX:=  1.0 else exit;

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

      Gear.State:= Gear.State or gstFalling

      end

   end

   end

   end

   end

   end

   end;

if (pX <> round(Gear.X)) and ((Gear.State and gstFalling) = 0) then

   begin

   Result:= true;

   exit

   end

until (pX = round(Gear.X)) and (pY = round(Gear.Y)) and ((Gear.State and gstFalling) = 0);

HHJump(AltGear, jmpHJump, GoInfo)

end;

function rndSign(num: integer): integer;

begin

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

                 else Result:= - num

end;

end.