diff -r 475c0f2f9d17 -r 30f2d1037d5d hedgewars/GSHandlers.inc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hedgewars/GSHandlers.inc	Mon Aug 22 13:35:41 2005 +0000
@@ -0,0 +1,550 @@
+(*
+ * Hedgewars, a worms-like game
+ * Copyright (c) 2004, 2005 Andrey Korotaev <unC0Rr@gmail.com>
+ *
+ * Distributed under the terms of the BSD-modified licence:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * with the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *)
+
+procedure doStepDrowningGear(Gear: PGear); forward;
+
+function CheckGearDrowning(Gear: PGear): boolean;
+begin
+Result:= Gear.Y + Gear.HalfHeight >= cWaterLine;
+if Result then
+   begin
+   Gear.State:= gstDrowning;
+   Gear.doStep:= doStepDrowningGear;
+   PlaySound(sndSplash)
+   end
+end;
+
+procedure CheckCollision(Gear: PGear);
+begin
+if TestCollisionXwithGear(Gear, Sign(Gear.X)) or TestCollisionYwithGear(Gear, Sign(Gear.Y))
+   then Gear.State:= Gear.State or      gstCollision
+   else Gear.State:= Gear.State and not gstCollision
+end;
+
+procedure CheckHHDamage(Gear: PGear);
+begin
+if Gear.dY > 0.35 then Gear.Damage:= Gear.Damage + round(25 * (abs(Gear.dY) - 0.35));
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+procedure CalcRotationDirAngle(Gear: PGear);
+var dAngle: real;
+begin
+dAngle:= (abs(Gear.dX) + abs(Gear.dY))*0.1;
+if Gear.dX >= 0 then Gear.DirAngle:= Gear.DirAngle + dAngle
+                else Gear.DirAngle:= Gear.DirAngle - dAngle;
+if Gear.DirAngle < 0 then Gear.DirAngle:= Gear.DirAngle + 16
+else if Gear.DirAngle >= 16 then Gear.DirAngle:= Gear.DirAngle - 16
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepDrowningGear(Gear: PGear);
+begin
+AllInactive:= false;
+Gear.Y:= Gear.Y + cDrownSpeed;
+if round(Gear.Y) > Gear.HalfHeight + cWaterLine + 48 + cVisibleWater then DeleteGear(Gear)
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepFallingGear(Gear: PGear);
+var b: boolean;
+begin
+if TestCollisionYwithGear(Gear, Sign(Gear.dY)) then
+   begin
+   Gear.dX:=   Gear.dX * Gear.Friction;
+   Gear.dY:= - Gear.dY * Gear.Elasticity;
+   b:= false
+   end else b:= true;
+if TestCollisionXwithGear(Gear, Sign(Gear.dX)) then
+   begin
+   Gear.dX:= - Gear.dX * Gear.Elasticity;
+//   Gear.dY:=   Gear.dY;
+   b:= false
+   end;
+if b then
+   begin
+   Gear.dY:= Gear.dY + cGravity;
+   Gear.State:= Gear.State and not gstCollision
+   end else
+   begin
+   if sqr(Gear.dX) + sqr(Gear.dY) < 0.00001 then
+      if (Gear.Timer = 0) then Gear.Active:= false
+                          else begin
+                          Gear.dX:= 0;
+                          Gear.dY:= 0
+                          end;
+   Gear.State:= Gear.State or gstCollision
+   end;
+Gear.X:= Gear.X + Gear.dX;
+Gear.Y:= Gear.Y + Gear.dY;
+CheckGearDrowning(Gear);
+if (sqr(Gear.dX) + sqr(Gear.dY) < 0.003) then Gear.State:= Gear.State and not gstMoving
+                                         else Gear.State:= Gear.State or      gstMoving
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepCloud(Gear: PGear);
+begin
+Gear.X:= Gear.X + cWindSpeed * 200 + Gear.dX;
+if Gear.X < -cScreenWidth-256 then Gear.X:= cScreenWidth + 2048 else
+if Gear.X > cScreenWidth + 2048 then Gear.X:= -cScreenWidth - 256
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepBomb(Gear: PGear);
+begin
+AllInactive:= false;
+doStepFallingGear(Gear);
+dec(Gear.Timer);
+if Gear.Timer = 0 then
+   begin
+   doMakeExplosion(round(Gear.X), round(Gear.Y), 50, EXPLAutoSound);
+   DeleteGear(Gear);
+   SetAllToActive;
+   exit
+   end;
+CalcRotationDirAngle(Gear);
+if (Gear.State and (gstCollision or gstMoving)) = (gstCollision or gstMoving) then PlaySound(sndGrenadeImpact)
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepGrenade(Gear: PGear);
+begin
+AllInactive:= false;
+Gear.dX:= Gear.dX + cWindSpeed;
+doStepFallingGear(Gear);
+if (Gear.State and gstCollision) <> 0 then
+   begin
+   doMakeExplosion(round(Gear.X), round(Gear.Y), 50, EXPLAutoSound);
+   DeleteGear(Gear);
+   SetAllToActive;
+   exit
+   end;
+if (GameTicks and $3F) = 0 then
+   AddGear(round(Gear.X), round(Gear.Y), gtSmokeTrace, 0)
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepHealthTag(Gear: PGear);
+begin
+AllInactive:= false;
+dec(Gear.Timer);
+Gear.Y:= Gear.Y - 0.07;
+if Gear.Timer = 0 then
+   begin
+   PHedgehog(Gear.Hedgehog).Gear.Active:= true;
+   DeleteGear(Gear)
+   end
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepGrave(Gear: PGear);
+begin
+AllInactive:= false;
+if Gear.dY < 0 then
+   if TestCollisionY(Gear, -1) then Gear.dY:= 0;
+
+if Gear.dY >=0 then
+   if TestCollisionY(Gear, 1) then
+      begin
+      Gear.dY:= - Gear.dY * Gear.Elasticity;
+      if Gear.dY > - 0.001 then
+         begin
+         Gear.Active:= false;
+         exit
+         end else if Gear.dY < - 0.03 then PlaySound(sndGraveImpact)
+      end;
+Gear.Y:= Gear.Y + Gear.dY;
+CheckGearDrowning(Gear);
+Gear.dY:= Gear.dY + cGravity
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepUFOWork(Gear: PGear);
+var t: real;
+begin
+AllInactive:= false;
+t:= sqrt(sqr(Gear.dX) + sqr(Gear.dY));
+Gear.dX:= Gear.Elasticity * (Gear.dX + 0.000004 * (TargetPoint.X - trunc(Gear.X)));
+Gear.dY:= Gear.Elasticity * (Gear.dY + 0.000004 * (TargetPoint.Y - trunc(Gear.Y)));
+t:= t / (sqrt(sqr(Gear.dX) + sqr(Gear.dY)));
+Gear.dX:= Gear.dX * t;
+Gear.dY:= Gear.dY * t;
+Gear.X:= Gear.X + Gear.dX;
+Gear.Y:= Gear.Y + Gear.dY;
+CheckCollision(Gear);
+dec(Gear.Timer);
+if ((Gear.State and gstCollision) <> 0) or (Gear.Timer = 0) then
+   begin
+   doMakeExplosion(round(Gear.X), round(Gear.Y), 50, EXPLAutoSound);
+   DeleteGear(Gear);
+   SetAllToActive
+   end;
+end;
+
+procedure doStepUFO(Gear: PGear);
+begin
+AllInactive:= false;
+Gear.X:= Gear.X + Gear.dX;
+Gear.Y:= Gear.Y + Gear.dY;
+Gear.dY:= Gear.dY + cGravity;
+CheckCollision(Gear);
+if (Gear.State and gstCollision) <> 0 then
+   begin
+   doMakeExplosion(round(Gear.X), round(Gear.Y), 50, EXPLAutoSound);
+   DeleteGear(Gear);
+   SetAllToActive;
+   exit
+   end;
+dec(Gear.Timer);
+if Gear.Timer = 0 then
+   begin
+   Gear.Timer:= 5000;
+   Gear.doStep:= doStepUFOWork
+   end;
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepShotgunShot(Gear: PGear);
+var i: LongWord;
+begin
+AllInactive:= false;
+if Gear.Timer > 0 then
+   begin
+   dec(Gear.Timer);
+   if Gear.Timer = 1 then PlaySound(sndShotgunFire);
+   exit
+   end;
+i:= 200;
+repeat
+Gear.X:= Gear.X + Gear.dX;
+Gear.Y:= Gear.Y + Gear.dY;
+CheckCollision(Gear);
+if (Gear.State and gstCollision) <> 0 then
+   begin
+   doMakeExplosion(round(Gear.X), round(Gear.Y), 25, EXPLAllDamageInRadius);
+   DeleteGear(Gear);
+   SetAllToActive;
+   exit
+   end;
+dec(i)
+until i = 0;
+if (Gear.X < 0) or (Gear.Y < 0) or (Gear.X > 2048) or (Gear.Y > 1024) then
+   DeleteGear(Gear)
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepActionTimer(Gear: PGear);
+begin
+dec(Gear.Timer);
+case Gear.State of
+     gtsStartGame: begin
+                   AllInactive:= false;
+                   if Gear.Timer > 0 then exit;
+                   AddCaption('Let''s fight!', $FFFFFF, capgrpStartGame);
+                   DeleteGear(Gear)
+                   end;
+     end;
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepPickHammerWork(Gear: PGear);
+var i, ei: integer;
+    HHGear: PGear;
+begin
+Allinactive:= false;
+dec(Gear.Timer);
+if (Gear.Timer = 0)or((Gear.Message and gm_Destroy) <> 0) then
+   begin
+   DeleteGear(Gear);
+   AfterAttack;
+   SetAllToActive;
+   exit
+   end;
+HHGear:= PHedgehog(Gear.Hedgehog).Gear;
+if (Gear.Timer and $3F) = 0 then
+   begin
+   i:= round(Gear.X) - Gear.HalfWidth  - GetRandom(2);
+   ei:= round(Gear.X) + Gear.HalfWidth + GetRandom(2);
+   while i <= ei do
+         begin
+         doMakeExplosion(i, round(Gear.Y) + 3, 3, 0);
+         inc(i, 1)
+         end;
+   SetAllToActive;
+   Gear.X:= Gear.X + Gear.dX;
+   Gear.Y:= Gear.Y + 1.9
+   end;
+if TestCollisionYwithGear(Gear, 1) then
+   begin
+   Gear.dY:= 0;
+   HHGear.dX:= 0.0000001 * Sign(PGear(Gear.Hedgehog).dX);
+   HHGear.dY:= 0;
+   end else
+   begin
+   Gear.dY:= Gear.dY + cGravity;
+   Gear.Y:= Gear.Y + Gear.dY;
+   if Gear.Y > 1024 then Gear.Timer:= 1
+   end;
+
+Gear.X:= Gear.X + HHGear.dX;
+HHGear.X:= Gear.X;
+HHGear.Y:= Gear.Y - cHHHalfHeight;
+
+if (Gear.Message and gm_Attack) <> 0 then
+   if (Gear.State and gsttmpFlag) <> 0 then Gear.Timer:= 1 else else
+   if (Gear.State and gsttmpFlag) = 0 then Gear.State:= Gear.State or gsttmpFlag;
+if ((Gear.Message and gm_Left) <> 0) then Gear.dX:= -0.3 else
+   if ((Gear.Message and gm_Right) <> 0) then Gear.dX:= 0.3
+                                         else Gear.dX:= 0;
+end;
+
+procedure doStepPickHammer(Gear: PGear);
+var i, y: integer;
+    ar: TRangeArray;
+begin
+i:= 0;
+y:= round(Gear.Y) - cHHHalfHeight*2;
+while y < round(Gear.Y) do
+   begin
+   ar[i].Left := round(Gear.X) - Gear.HalfWidth - GetRandom(2);
+   ar[i].Right:= round(Gear.X) + Gear.HalfWidth + GetRandom(2);
+   inc(y, 2);
+   inc(i)
+   end;
+DrawLineExplosions(@ar, 3, round(Gear.Y) - cHHHalfHeight*2, 2, Pred(i));
+Gear.dY:= PHedgehog(Gear.Hedgehog).Gear.dY;
+doStepPickHammerWork(Gear);
+Gear.doStep:= doStepPickHammerWork
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepRopeWork(Gear: PGear);
+const pidiv2: real = pi/2;
+      flCheck: boolean = false;
+var HHGear: PGear;
+    len, cs, cc, tx, ty: real;
+    lx, ly: integer;
+
+    procedure DeleteMe;
+    begin
+      with HHGear^ do
+           begin
+           Message:= Message and not gm_Attack;
+           State:= State or gstFalling;
+           end;
+      DeleteGear(Gear);
+      OnUsedAmmo(PHedgehog(Gear.Hedgehog)^.Ammo);
+      ApplyAmmoChanges(PHedgehog(Gear.Hedgehog))
+    end;
+
+begin
+HHGear:= PHedgehog(Gear.Hedgehog).Gear;
+if (HHGear.State and gstHHDriven) = 0 then
+   begin
+   DeleteMe;
+   exit
+   end;
+Gear.dX:= HHGear.X - Gear.X;
+Gear.dY:= HHGear.Y - Gear.Y;
+
+if (Gear.Message and gm_Left  <> 0) then HHGear.dX:= HHGear.dX - 0.0002 else
+if (Gear.Message and gm_Right <> 0) then HHGear.dX:= HHGear.dX + 0.0002;
+
+if not TestCollisionYwithGear(HHGear, 1) then HHGear.dY:= HHGear.dY + cGravity;
+
+HHGear.DirAngle:= arctan(Gear.dY + HHGear.dY, Gear.dX + HHGear.dX);
+cs:= sin(HHGear.DirAngle);
+cc:= cos(HHGear.DirAngle);
+
+flCheck:= not flCheck;
+if flCheck then  // check whether rope needs dividing
+   begin
+   len:= Gear.Elasticity - 20;
+   while len > 5 do
+         begin
+         tx:= cc*len;
+         ty:= cs*len;
+//         if   TestCollisionXwithXYShift(Gear, round(tx), round(ty), Sign(HHGear.dX))
+///           or TestCollisionYwithXYShift(Gear, round(tx), round(ty), Sign(HHGear.dY)) then
+         lx:= round(Gear.X + tx) + sign(HHGear.dX);
+         ly:= round(Gear.Y + ty) + sign(HHGear.dY);
+         if ((ly and $FFFFFC00) = 0) and ((lx and $FFFFF800) = 0)and (Land[ly, lx] <> 0) then
+           begin
+           with RopePoints.ar[RopePoints.Count] do
+                begin
+                X:= Gear.X;
+                Y:= Gear.Y;
+                if RopePoints.Count = 0 then RopePoints.HookAngle:= DxDy2Angle32(Gear.dY, Gear.dX);
+                b:= (cc * HHGear.dY) > (cs * HHGear.dX);
+                dLen:= len
+                end;
+           Gear.X:= Gear.X + tx;
+           Gear.Y:= Gear.Y + ty;
+           inc(RopePoints.Count);
+           Gear.Elasticity:= Gear.Elasticity - len;
+           Gear.Friction:= Gear.Friction - len;
+           break
+           end;
+         len:= len - 3
+         end;
+   end else
+   if RopePoints.Count > 0 then // check whether the last dividing point could be removed
+      begin
+      tx:= RopePoints.ar[Pred(RopePoints.Count)].X;
+      ty:= RopePoints.ar[Pred(RopePoints.Count)].Y;
+      if RopePoints.ar[Pred(RopePoints.Count)].b xor ((tx - Gear.X) * (ty - HHGear.Y) > (tx - HHGear.X) * (ty - Gear.Y)) then
+         begin
+         dec(RopePoints.Count);
+         Gear.X:=RopePoints.ar[RopePoints.Count].X;
+         Gear.Y:=RopePoints.ar[RopePoints.Count].Y;
+         Gear.Elasticity:= Gear.Elasticity + RopePoints.ar[RopePoints.Count].dLen;
+         Gear.Friction:= Gear.Friction + RopePoints.ar[RopePoints.Count].dLen
+         end
+      end;
+
+Gear.dX:= HHGear.X - Gear.X;
+Gear.dY:= HHGear.Y - Gear.Y;
+HHGear.DirAngle:= arctan(Gear.dY + HHGear.dY, Gear.dX + HHGear.dX);
+cs:= sin(HHGear.DirAngle);
+cc:= cos(HHGear.DirAngle);
+
+HHGear.dX:= HHGear.X;
+HHGear.dY:= HHGear.Y;
+
+if ((Gear.Message and gm_Down) <> 0) and (Gear.Elasticity < Gear.Friction) then
+   if not (TestCollisionXwithGear(HHGear, Sign(Gear.dX))
+        or TestCollisionYwithGear(HHGear, Sign(Gear.dY))) then Gear.Elasticity:= Gear.Elasticity + 0.3;
+
+if ((Gear.Message and gm_Up) <> 0) and (Gear.Elasticity > 30) then
+   if not (TestCollisionXwithGear(HHGear, -Sign(Gear.dX))
+        or TestCollisionYwithGear(HHGear, -Sign(Gear.dY))) then Gear.Elasticity:= Gear.Elasticity - 0.3;
+
+HHGear.X:= Gear.X + cc*Gear.Elasticity;
+HHGear.Y:= Gear.Y + cs*Gear.Elasticity;
+
+HHGear.dX:= HHGear.X - HHGear.dX;
+HHGear.dY:= HHGear.Y - HHGear.dY;
+
+if TestCollisionXwithGear(HHGear, Sign(HHGear.dX)) then
+   HHGear.dX:= -0.9 * HHGear.dX;
+if TestCollisionYwithGear(HHGear, Sign(HHGear.dY)) then
+   HHGear.dY:= -0.9 * HHGear.dY;
+
+if (Gear.Message and gm_Attack) <> 0 then
+   if (Gear.State and gsttmpFlag) <> 0 then DeleteMe else
+else if (Gear.State and gsttmpFlag) = 0 then Gear.State:= Gear.State or gsttmpFlag;
+end;
+
+
+procedure doStepRopeAttach(Gear: PGear);
+var HHGear: PGear;
+    tx, ty, tt: real;
+begin
+Gear.X:= Gear.X + Gear.dX;
+Gear.Y:= Gear.Y + Gear.dY;
+Gear.Elasticity:= Gear.Elasticity + 1.0;
+HHGear:= PHedgehog(Gear.Hedgehog)^.Gear;
+if (HHGear.State and gstFalling) <> 0 then
+   if HHTestCollisionYwithGear(HHGear, 1) then
+      begin
+      HHGear.dY:= 0;
+      CheckHHDamage(HHGear);
+      HHGear.State:= HHGear.State and not (gstFalling or gstHHJumping);
+      end else
+      begin
+      if TestCollisionXwithGear(HHGear, Sign(HHGear.dX)) then HHGear.dX:= 0.0000001 * Sign(HHGear.dX);
+      HHGear.X:= HHGear.X + HHGear.dX;
+      HHGear.Y:= HHGear.Y + HHGear.dY;
+      Gear.X:= Gear.X + HHGear.dX;
+      Gear.Y:= Gear.Y + HHGear.dY;
+      HHGear.dY:= HHGear.dY + cGravity;
+      tt:= Gear.Elasticity;
+      tx:= 0;
+      ty:= 0;
+      while tt > 20 do
+            begin
+            if  TestCollisionXwithXYShift(Gear, round(tx), round(ty), Sign(Gear.dX))
+             or TestCollisionYwithXYShift(Gear, round(tx), round(ty), Sign(Gear.dY)) then
+                begin
+                Gear.X:= Gear.X + tx;
+                Gear.Y:= Gear.Y + ty;
+                Gear.Elasticity:= tt;
+                Gear.doStep:= doStepRopeWork;
+                with HHGear^ do State:= State and not gstAttacking;
+                tt:= 0
+                end;
+            tx:= tx - Gear.dX - Gear.dX;
+            ty:= ty - Gear.dY - Gear.dY;
+            tt:= tt - 2.0;
+            end;
+      end;
+CheckCollision(Gear);
+if (Gear.State and gstCollision) <> 0 then
+   begin
+   Gear.doStep:= doStepRopeWork;
+   with HHGear^ do State:= State and not gstAttacking;
+   if Gear.Elasticity < 10 then
+      Gear.Elasticity:= 10000;
+   end;
+
+if (Gear.Elasticity >= Gear.Friction) or ((Gear.Message and gm_Attack) = 0) then
+   begin
+   with PHedgehog(Gear.Hedgehog).Gear^ do
+        begin
+        State:= State and not gstAttacking;
+        Message:= Message and not gm_Attack
+        end;
+   DeleteGear(Gear)
+   end
+end;
+
+procedure doStepRope(Gear: PGear);
+begin
+Gear.doStep:= doStepRopeAttach
+end;
+
+////////////////////////////////////////////////////////////////////////////////
+procedure doStepSmokeTrace(Gear: PGear);
+begin
+inc(Gear.Timer);
+if Gear.Timer > 64 then
+   begin
+   Gear.Timer:= 0;
+   dec(Gear.Tag)
+   end;
+Gear.dX:= Gear.dX + cWindSpeed;
+Gear.X:= Gear.X + Gear.dX;
+if Gear.Tag = 0 then DeleteGear(Gear)
+end;