--- a/hedgewars/uGearsHandlersRope.pas Mon Sep 03 20:04:42 2012 +0200
+++ b/hedgewars/uGearsHandlersRope.pas Mon Sep 03 14:08:01 2012 -0400
@@ -1,462 +1,462 @@
-(*
- * Hedgewars, a free turn based strategy game
- * Copyright (c) 2004-2012 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 uGearsHandlersRope;
-interface
-
-uses uTypes;
-
-procedure doStepRope(Gear: PGear);
-
-implementation
-uses uConsts, uFloat, uCollisions, uVariables, uGearsList, uSound, uGearsUtils,
- uAmmos, uDebug, uUtils, uGearsHedgehog, uGearsRender;
-
-procedure doStepRopeAfterAttack(Gear: PGear);
-var
- HHGear: PGear;
-begin
- HHGear := Gear^.Hedgehog^.Gear;
- if ((HHGear^.State and gstHHDriven) = 0)
- or (CheckGearDrowning(HHGear))
- or (TestCollisionYwithGear(HHGear, 1) <> 0) then
- begin
- DeleteGear(Gear);
- isCursorVisible := false;
- ApplyAmmoChanges(HHGear^.Hedgehog^);
- exit
- end;
-
- HedgehogChAngle(HHGear);
-
- if TestCollisionXwithGear(HHGear, hwSign(HHGear^.dX)) then
- SetLittle(HHGear^.dX);
-
- if HHGear^.dY.isNegative and (TestCollisionYwithGear(HHGear, -1) <> 0) then
- HHGear^.dY := _0;
- HHGear^.X := HHGear^.X + HHGear^.dX;
- HHGear^.Y := HHGear^.Y + HHGear^.dY;
- HHGear^.dY := HHGear^.dY + cGravity;
-
- if (GameFlags and gfMoreWind) <> 0 then
- HHGear^.dX := HHGear^.dX + cWindSpeed / HHGear^.Density;
-
- if (Gear^.Message and gmAttack) <> 0 then
- begin
- Gear^.X := HHGear^.X;
- Gear^.Y := HHGear^.Y;
-
- ApplyAngleBounds(Gear^.Hedgehog^, amRope);
-
- Gear^.dX := SignAs(AngleSin(HHGear^.Angle), HHGear^.dX);
- Gear^.dY := -AngleCos(HHGear^.Angle);
- Gear^.Friction := _4_5 * cRopePercent;
- Gear^.Elasticity := _0;
- Gear^.State := Gear^.State and (not gsttmpflag);
- Gear^.doStep := @doStepRope;
- end
-end;
-
-procedure RopeDeleteMe(Gear, HHGear: PGear);
-begin
- with HHGear^ do
- begin
- Message := Message and (not gmAttack);
- State := (State or gstMoving) and (not gstWinner);
- end;
- DeleteGear(Gear)
-end;
-
-procedure RopeWaitCollision(Gear, HHGear: PGear);
-begin
- with HHGear^ do
- begin
- Message := Message and (not gmAttack);
- State := State or gstMoving;
- end;
- RopePoints.Count := 0;
- Gear^.Elasticity := _0;
- Gear^.doStep := @doStepRopeAfterAttack
-end;
-
-procedure doStepRopeWork(Gear: PGear);
-var
- HHGear: PGear;
- len, tx, ty, nx, ny, ropeDx, ropeDy, mdX, mdY: hwFloat;
- lx, ly, cd: LongInt;
- haveCollision,
- haveDivided: boolean;
-
-begin
- if GameTicks mod 4 <> 0 then exit;
-
- HHGear := Gear^.Hedgehog^.Gear;
-
- if ((HHGear^.State and gstHHDriven) = 0)
- or (CheckGearDrowning(HHGear)) or (Gear^.PortalCounter <> 0) then
- begin
- PlaySound(sndRopeRelease);
- RopeDeleteMe(Gear, HHGear);
- exit
- end;
-
- HHGear^.dX.QWordValue:= HHGear^.dX.QWordValue shl 2;
- HHGear^.dY.QWordValue:= HHGear^.dY.QWordValue shl 2;
- if (Gear^.Message and gmLeft <> 0) and (not TestCollisionXwithGear(HHGear, -1)) then
- HHGear^.dX := HHGear^.dX - _0_0032;
-
- if (Gear^.Message and gmRight <> 0) and (not TestCollisionXwithGear(HHGear, 1)) then
- HHGear^.dX := HHGear^.dX + _0_0032;
-
- // vector between hedgehog and rope attaching point
- ropeDx := HHGear^.X - Gear^.X;
- ropeDy := HHGear^.Y - Gear^.Y;
-
- if TestCollisionYwithGear(HHGear, 1) = 0 then
- begin
-
- // depending on the rope vector we know which X-side to check for collision
- // in order to find out if the hog can still be moved by gravity
- if ropeDx.isNegative = RopeDy.IsNegative then
- cd:= -1
- else
- cd:= 1;
-
- // apply gravity if there is no obstacle
- if not TestCollisionXwithGear(HHGear, cd) then
- HHGear^.dY := HHGear^.dY + cGravity * 16;
-
- if (GameFlags and gfMoreWind) <> 0 then
- // apply wind if there's no obstacle
- if not TestCollisionXwithGear(HHGear, hwSign(cWindSpeed)) then
- HHGear^.dX := HHGear^.dX + cWindSpeed * 16 / HHGear^.Density;
- end;
-
- mdX := ropeDx + HHGear^.dX;
- mdY := ropeDy + HHGear^.dY;
- len := _1 / Distance(mdX, mdY);
- // rope vector plus hedgehog direction vector normalized
- mdX := mdX * len;
- mdY := mdY * len;
-
- // for visual purposes only
- Gear^.dX := mdX;
- Gear^.dY := mdY;
-
- /////
- tx := HHGear^.X;
- ty := HHGear^.Y;
-
- if ((Gear^.Message and gmDown) <> 0) and (Gear^.Elasticity < Gear^.Friction) then
- if not (TestCollisionXwithGear(HHGear, hwSign(ropeDx))
- or (TestCollisionYwithGear(HHGear, hwSign(ropeDy)) <> 0)) then
- Gear^.Elasticity := Gear^.Elasticity + _1_2;
-
- if ((Gear^.Message and gmUp) <> 0) and (Gear^.Elasticity > _30) then
- if not (TestCollisionXwithGear(HHGear, -hwSign(ropeDx))
- or (TestCollisionYwithGear(HHGear, -hwSign(ropeDy)) <> 0)) then
- Gear^.Elasticity := Gear^.Elasticity - _1_2;
-
- HHGear^.X := Gear^.X + mdX * Gear^.Elasticity;
- HHGear^.Y := Gear^.Y + mdY * Gear^.Elasticity;
-
- HHGear^.dX := HHGear^.X - tx;
- HHGear^.dY := HHGear^.Y - ty;
- ////
-
-
- haveDivided := false;
- // check whether rope needs dividing
-
- len := Gear^.Elasticity - _5;
- nx := Gear^.X + mdX * len;
- ny := Gear^.Y + mdY * len;
- tx := mdX * _1_2; // should be the same as increase step
- ty := mdY * _1_2;
-
- while len > _3 do
- begin
- lx := hwRound(nx);
- ly := hwRound(ny);
- if ((ly and LAND_HEIGHT_MASK) = 0) and ((lx and LAND_WIDTH_MASK) = 0) and ((Land[ly, lx] and $FF00) <> 0) then
- begin
- ny := _1 / Distance(ropeDx, ropeDy);
- // old rope pos
- nx := ropeDx * ny;
- ny := ropeDy * ny;
-
- with RopePoints.ar[RopePoints.Count] do
- begin
- X := Gear^.X;
- Y := Gear^.Y;
- if RopePoints.Count = 0 then
- RopePoints.HookAngle := DxDy2Angle(Gear^.dY, Gear^.dX);
- b := (nx * HHGear^.dY) > (ny * HHGear^.dX);
- dLen := len
- end;
-
- with RopePoints.rounded[RopePoints.Count] do
- begin
- X := hwRound(Gear^.X);
- Y := hwRound(Gear^.Y);
- end;
-
- Gear^.X := Gear^.X + nx * len;
- Gear^.Y := Gear^.Y + ny * len;
- inc(RopePoints.Count);
- TryDo(RopePoints.Count <= MAXROPEPOINTS, 'Rope points overflow', true);
- Gear^.Elasticity := Gear^.Elasticity - len;
- Gear^.Friction := Gear^.Friction - len;
- haveDivided := true;
- break
- end;
- nx := nx - tx;
- ny := ny - ty;
-
- // len := len - _1_2 // should be the same as increase step
- len.QWordValue := len.QWordValue - _1_2.QWordValue;
- end;
-
- if not haveDivided then
- 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;
- mdX := tx - Gear^.X;
- mdY := ty - Gear^.Y;
- if RopePoints.ar[Pred(RopePoints.Count)].b xor (mdX * (ty - HHGear^.Y) > (tx - HHGear^.X) * mdY) 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;
-
- // restore hog position
- len := _1 / Distance(mdX, mdY);
- mdX := mdX * len;
- mdY := mdY * len;
-
- HHGear^.X := Gear^.X - mdX * Gear^.Elasticity;
- HHGear^.Y := Gear^.Y - mdY * Gear^.Elasticity;
- end
- end;
-
- haveCollision := false;
- if TestCollisionXwithGear(HHGear, hwSign(HHGear^.dX)) then
- begin
- HHGear^.dX := -_0_6 * HHGear^.dX;
- haveCollision := true
- end;
- if TestCollisionYwithGear(HHGear, hwSign(HHGear^.dY)) <> 0 then
- begin
- HHGear^.dY := -_0_6 * HHGear^.dY;
- haveCollision := true
- end;
-
- if haveCollision and (Gear^.Message and (gmLeft or gmRight) <> 0) and (Gear^.Message and (gmUp or gmDown) <> 0) then
- begin
- HHGear^.dX := SignAs(hwAbs(HHGear^.dX) + _0_8, HHGear^.dX);
- HHGear^.dY := SignAs(hwAbs(HHGear^.dY) + _0_8, HHGear^.dY)
- end;
-
- len := hwSqr(HHGear^.dX) + hwSqr(HHGear^.dY);
- if len > _10 then
- begin
- len := _3_2 / hwSqrt(len);
- HHGear^.dX := HHGear^.dX * len;
- HHGear^.dY := HHGear^.dY * len;
- end;
-
- haveCollision:= ((hwRound(Gear^.Y) and LAND_HEIGHT_MASK) = 0) and ((hwRound(Gear^.X) and LAND_WIDTH_MASK) = 0) and ((Land[hwRound(Gear^.Y), hwRound(Gear^.X)]) <> 0);
-
- if not haveCollision then
- begin
- // backup gear location
- tx:= Gear^.X;
- ty:= Gear^.Y;
-
- if RopePoints.Count > 0 then
- begin
- // set gear location to the remote end of the rope, the attachment point
- Gear^.X:= RopePoints.ar[0].X;
- Gear^.Y:= RopePoints.ar[0].Y;
- end;
-
- CheckCollision(Gear);
- // if we haven't found any collision yet then check the other side too
- if (Gear^.State and gstCollision) = 0 then
- begin
- Gear^.dX.isNegative:= not Gear^.dX.isNegative;
- Gear^.dY.isNegative:= not Gear^.dY.isNegative;
- CheckCollision(Gear);
- Gear^.dX.isNegative:= not Gear^.dX.isNegative;
- Gear^.dY.isNegative:= not Gear^.dY.isNegative;
- end;
-
- haveCollision:= (Gear^.State and gstCollision) <> 0;
-
- // restore gear location
- Gear^.X:= tx;
- Gear^.Y:= ty;
- end;
-
- // if the attack key is pressed, lose rope contact as well
- if (Gear^.Message and gmAttack) <> 0 then
- haveCollision:= false;
-
- HHGear^.dX.QWordValue:= HHGear^.dX.QWordValue shr 2;
- HHGear^.dY.QWordValue:= HHGear^.dY.QWordValue shr 2;
- if not haveCollision then
- begin
- if (Gear^.State and gsttmpFlag) <> 0 then
- begin
- PlaySound(sndRopeRelease);
- if Gear^.Hedgehog^.CurAmmoType <> amParachute then
- RopeWaitCollision(Gear, HHGear)
- else
- RopeDeleteMe(Gear, HHGear)
- end
- end
- else
- if (Gear^.State and gsttmpFlag) = 0 then
- Gear^.State := Gear^.State or gsttmpFlag;
-end;
-
-procedure RopeRemoveFromAmmo(Gear, HHGear: PGear);
-begin
- if (Gear^.State and gstAttacked) = 0 then
- begin
- OnUsedAmmo(HHGear^.Hedgehog^);
- Gear^.State := Gear^.State or gstAttacked
- end;
- ApplyAmmoChanges(HHGear^.Hedgehog^)
-end;
-
-procedure doStepRopeAttach(Gear: PGear);
-var
- HHGear: PGear;
- tx, ty, tt: hwFloat;
-begin
- Gear^.X := Gear^.X - Gear^.dX;
- Gear^.Y := Gear^.Y - Gear^.dY;
- Gear^.Elasticity := Gear^.Elasticity + _1;
-
- HHGear := Gear^.Hedgehog^.Gear;
- DeleteCI(HHGear);
-
- if (HHGear^.State and gstMoving) <> 0 then
- begin
- if TestCollisionXwithGear(HHGear, hwSign(HHGear^.dX)) then
- SetLittle(HHGear^.dX);
- if HHGear^.dY.isNegative and (TestCollisionYwithGear(HHGear, -1) <> 0) then
- HHGear^.dY := _0;
-
- HHGear^.X := HHGear^.X + HHGear^.dX;
- Gear^.X := Gear^.X + HHGear^.dX;
-
- if TestCollisionYwithGear(HHGear, 1) <> 0 then
- begin
- CheckHHDamage(HHGear);
- HHGear^.dY := _0
- //HHGear^.State:= HHGear^.State and (not (gstHHJumping or gstHHHJump));
- end
- else
- begin
- HHGear^.Y := HHGear^.Y + HHGear^.dY;
- Gear^.Y := Gear^.Y + HHGear^.dY;
- HHGear^.dY := HHGear^.dY + cGravity;
- if (GameFlags and gfMoreWind) <> 0 then
- HHGear^.dX := HHGear^.dX + cWindSpeed / HHGear^.Density
- end;
-
- tt := Gear^.Elasticity;
- tx := _0;
- ty := _0;
- while tt > _20 do
- begin
- if ((hwRound(Gear^.Y+ty) and LAND_HEIGHT_MASK) = 0) and ((hwRound(Gear^.X+tx) and LAND_WIDTH_MASK) = 0) and ((Land[hwRound(Gear^.Y+ty), hwRound(Gear^.X+tx)] and $FF00) <> 0) then
- begin
- Gear^.X := Gear^.X + tx;
- Gear^.Y := Gear^.Y + ty;
- Gear^.Elasticity := tt;
- Gear^.doStep := @doStepRopeWork;
- PlaySound(sndRopeAttach);
- with HHGear^ do
- begin
- State := State and (not (gstAttacking or gstHHJumping or gstHHHJump));
- Message := Message and (not gmAttack)
- end;
-
- RopeRemoveFromAmmo(Gear, HHGear);
-
- tt := _0;
- exit
- end;
- tx := tx + Gear^.dX + Gear^.dX;
- ty := ty + Gear^.dY + Gear^.dY;
- tt := tt - _2;
- end;
- end;
-
- CheckCollision(Gear);
-
- if (Gear^.State and gstCollision) <> 0 then
- if Gear^.Elasticity < _10 then
- Gear^.Elasticity := _10000
- else
- begin
- Gear^.doStep := @doStepRopeWork;
- PlaySound(sndRopeAttach);
- with HHGear^ do
- begin
- State := State and (not (gstAttacking or gstHHJumping or gstHHHJump));
- Message := Message and (not gmAttack)
- end;
-
- RopeRemoveFromAmmo(Gear, HHGear);
-
- exit
- end;
-
- if (Gear^.Elasticity > Gear^.Friction)
- or ((Gear^.Message and gmAttack) = 0)
- or ((HHGear^.State and gstHHDriven) = 0)
- or (HHGear^.Damage > 0) then
- begin
- with Gear^.Hedgehog^.Gear^ do
- begin
- State := State and (not gstAttacking);
- Message := Message and (not gmAttack)
- end;
- DeleteGear(Gear);
- exit;
- end;
- if CheckGearDrowning(HHGear) then DeleteGear(Gear)
-end;
-
-procedure doStepRope(Gear: PGear);
-begin
- Gear^.dX := - Gear^.dX;
- Gear^.dY := - Gear^.dY;
- Gear^.doStep := @doStepRopeAttach;
- PlaySound(sndRopeShot)
-end;
-
-end.
+(*
+ * Hedgewars, a free turn based strategy game
+ * Copyright (c) 2004-2012 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 uGearsHandlersRope;
+interface
+
+uses uTypes;
+
+procedure doStepRope(Gear: PGear);
+
+implementation
+uses uConsts, uFloat, uCollisions, uVariables, uGearsList, uSound, uGearsUtils,
+ uAmmos, uDebug, uUtils, uGearsHedgehog, uGearsRender;
+
+procedure doStepRopeAfterAttack(Gear: PGear);
+var
+ HHGear: PGear;
+begin
+ HHGear := Gear^.Hedgehog^.Gear;
+ if ((HHGear^.State and gstHHDriven) = 0)
+ or (CheckGearDrowning(HHGear))
+ or (TestCollisionYwithGear(HHGear, 1) <> 0) then
+ begin
+ DeleteGear(Gear);
+ isCursorVisible := false;
+ ApplyAmmoChanges(HHGear^.Hedgehog^);
+ exit
+ end;
+
+ HedgehogChAngle(HHGear);
+
+ if TestCollisionXwithGear(HHGear, hwSign(HHGear^.dX)) then
+ SetLittle(HHGear^.dX);
+
+ if HHGear^.dY.isNegative and (TestCollisionYwithGear(HHGear, -1) <> 0) then
+ HHGear^.dY := _0;
+ HHGear^.X := HHGear^.X + HHGear^.dX;
+ HHGear^.Y := HHGear^.Y + HHGear^.dY;
+ HHGear^.dY := HHGear^.dY + cGravity;
+
+ if (GameFlags and gfMoreWind) <> 0 then
+ HHGear^.dX := HHGear^.dX + cWindSpeed / HHGear^.Density;
+
+ if (Gear^.Message and gmAttack) <> 0 then
+ begin
+ Gear^.X := HHGear^.X;
+ Gear^.Y := HHGear^.Y;
+
+ ApplyAngleBounds(Gear^.Hedgehog^, amRope);
+
+ Gear^.dX := SignAs(AngleSin(HHGear^.Angle), HHGear^.dX);
+ Gear^.dY := -AngleCos(HHGear^.Angle);
+ Gear^.Friction := _4_5 * cRopePercent;
+ Gear^.Elasticity := _0;
+ Gear^.State := Gear^.State and (not gsttmpflag);
+ Gear^.doStep := @doStepRope;
+ end
+end;
+
+procedure RopeDeleteMe(Gear, HHGear: PGear);
+begin
+ with HHGear^ do
+ begin
+ Message := Message and (not gmAttack);
+ State := (State or gstMoving) and (not gstWinner);
+ end;
+ DeleteGear(Gear)
+end;
+
+procedure RopeWaitCollision(Gear, HHGear: PGear);
+begin
+ with HHGear^ do
+ begin
+ Message := Message and (not gmAttack);
+ State := State or gstMoving;
+ end;
+ RopePoints.Count := 0;
+ Gear^.Elasticity := _0;
+ Gear^.doStep := @doStepRopeAfterAttack
+end;
+
+procedure doStepRopeWork(Gear: PGear);
+var
+ HHGear: PGear;
+ len, tx, ty, nx, ny, ropeDx, ropeDy, mdX, mdY: hwFloat;
+ lx, ly, cd: LongInt;
+ haveCollision,
+ haveDivided: boolean;
+
+begin
+ if GameTicks mod 4 <> 0 then exit;
+
+ HHGear := Gear^.Hedgehog^.Gear;
+
+ if ((HHGear^.State and gstHHDriven) = 0)
+ or (CheckGearDrowning(HHGear)) or (Gear^.PortalCounter <> 0) then
+ begin
+ PlaySound(sndRopeRelease);
+ RopeDeleteMe(Gear, HHGear);
+ exit
+ end;
+
+ HHGear^.dX.QWordValue:= HHGear^.dX.QWordValue shl 2;
+ HHGear^.dY.QWordValue:= HHGear^.dY.QWordValue shl 2;
+ if (Gear^.Message and gmLeft <> 0) and (not TestCollisionXwithGear(HHGear, -1)) then
+ HHGear^.dX := HHGear^.dX - _0_0032;
+
+ if (Gear^.Message and gmRight <> 0) and (not TestCollisionXwithGear(HHGear, 1)) then
+ HHGear^.dX := HHGear^.dX + _0_0032;
+
+ // vector between hedgehog and rope attaching point
+ ropeDx := HHGear^.X - Gear^.X;
+ ropeDy := HHGear^.Y - Gear^.Y;
+
+ if TestCollisionYwithGear(HHGear, 1) = 0 then
+ begin
+
+ // depending on the rope vector we know which X-side to check for collision
+ // in order to find out if the hog can still be moved by gravity
+ if ropeDx.isNegative = RopeDy.IsNegative then
+ cd:= -1
+ else
+ cd:= 1;
+
+ // apply gravity if there is no obstacle
+ if not TestCollisionXwithGear(HHGear, cd) then
+ HHGear^.dY := HHGear^.dY + cGravity * 16;
+
+ if (GameFlags and gfMoreWind) <> 0 then
+ // apply wind if there's no obstacle
+ if not TestCollisionXwithGear(HHGear, hwSign(cWindSpeed)) then
+ HHGear^.dX := HHGear^.dX + cWindSpeed * 16 / HHGear^.Density;
+ end;
+
+ mdX := ropeDx + HHGear^.dX;
+ mdY := ropeDy + HHGear^.dY;
+ len := _1 / Distance(mdX, mdY);
+ // rope vector plus hedgehog direction vector normalized
+ mdX := mdX * len;
+ mdY := mdY * len;
+
+ // for visual purposes only
+ Gear^.dX := mdX;
+ Gear^.dY := mdY;
+
+ /////
+ tx := HHGear^.X;
+ ty := HHGear^.Y;
+
+ if ((Gear^.Message and gmDown) <> 0) and (Gear^.Elasticity < Gear^.Friction) then
+ if not (TestCollisionXwithGear(HHGear, hwSign(ropeDx))
+ or (TestCollisionYwithGear(HHGear, hwSign(ropeDy)) <> 0)) then
+ Gear^.Elasticity := Gear^.Elasticity + _1_2;
+
+ if ((Gear^.Message and gmUp) <> 0) and (Gear^.Elasticity > _30) then
+ if not (TestCollisionXwithGear(HHGear, -hwSign(ropeDx))
+ or (TestCollisionYwithGear(HHGear, -hwSign(ropeDy)) <> 0)) then
+ Gear^.Elasticity := Gear^.Elasticity - _1_2;
+
+ HHGear^.X := Gear^.X + mdX * Gear^.Elasticity;
+ HHGear^.Y := Gear^.Y + mdY * Gear^.Elasticity;
+
+ HHGear^.dX := HHGear^.X - tx;
+ HHGear^.dY := HHGear^.Y - ty;
+ ////
+
+
+ haveDivided := false;
+ // check whether rope needs dividing
+
+ len := Gear^.Elasticity - _5;
+ nx := Gear^.X + mdX * len;
+ ny := Gear^.Y + mdY * len;
+ tx := mdX * _1_2; // should be the same as increase step
+ ty := mdY * _1_2;
+
+ while len > _3 do
+ begin
+ lx := hwRound(nx);
+ ly := hwRound(ny);
+ if ((ly and LAND_HEIGHT_MASK) = 0) and ((lx and LAND_WIDTH_MASK) = 0) and ((Land[ly, lx] and $FF00) <> 0) then
+ begin
+ ny := _1 / Distance(ropeDx, ropeDy);
+ // old rope pos
+ nx := ropeDx * ny;
+ ny := ropeDy * ny;
+
+ with RopePoints.ar[RopePoints.Count] do
+ begin
+ X := Gear^.X;
+ Y := Gear^.Y;
+ if RopePoints.Count = 0 then
+ RopePoints.HookAngle := DxDy2Angle(Gear^.dY, Gear^.dX);
+ b := (nx * HHGear^.dY) > (ny * HHGear^.dX);
+ dLen := len
+ end;
+
+ with RopePoints.rounded[RopePoints.Count] do
+ begin
+ X := hwRound(Gear^.X);
+ Y := hwRound(Gear^.Y);
+ end;
+
+ Gear^.X := Gear^.X + nx * len;
+ Gear^.Y := Gear^.Y + ny * len;
+ inc(RopePoints.Count);
+ TryDo(RopePoints.Count <= MAXROPEPOINTS, 'Rope points overflow', true);
+ Gear^.Elasticity := Gear^.Elasticity - len;
+ Gear^.Friction := Gear^.Friction - len;
+ haveDivided := true;
+ break
+ end;
+ nx := nx - tx;
+ ny := ny - ty;
+
+ // len := len - _1_2 // should be the same as increase step
+ len.QWordValue := len.QWordValue - _1_2.QWordValue;
+ end;
+
+ if not haveDivided then
+ 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;
+ mdX := tx - Gear^.X;
+ mdY := ty - Gear^.Y;
+ if RopePoints.ar[Pred(RopePoints.Count)].b xor (mdX * (ty - HHGear^.Y) > (tx - HHGear^.X) * mdY) 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;
+
+ // restore hog position
+ len := _1 / Distance(mdX, mdY);
+ mdX := mdX * len;
+ mdY := mdY * len;
+
+ HHGear^.X := Gear^.X - mdX * Gear^.Elasticity;
+ HHGear^.Y := Gear^.Y - mdY * Gear^.Elasticity;
+ end
+ end;
+
+ haveCollision := false;
+ if TestCollisionXwithGear(HHGear, hwSign(HHGear^.dX)) then
+ begin
+ HHGear^.dX := -_0_6 * HHGear^.dX;
+ haveCollision := true
+ end;
+ if TestCollisionYwithGear(HHGear, hwSign(HHGear^.dY)) <> 0 then
+ begin
+ HHGear^.dY := -_0_6 * HHGear^.dY;
+ haveCollision := true
+ end;
+
+ if haveCollision and (Gear^.Message and (gmLeft or gmRight) <> 0) and (Gear^.Message and (gmUp or gmDown) <> 0) then
+ begin
+ HHGear^.dX := SignAs(hwAbs(HHGear^.dX) + _0_8, HHGear^.dX);
+ HHGear^.dY := SignAs(hwAbs(HHGear^.dY) + _0_8, HHGear^.dY)
+ end;
+
+ len := hwSqr(HHGear^.dX) + hwSqr(HHGear^.dY);
+ if len > _10 then
+ begin
+ len := _3_2 / hwSqrt(len);
+ HHGear^.dX := HHGear^.dX * len;
+ HHGear^.dY := HHGear^.dY * len;
+ end;
+
+ haveCollision:= ((hwRound(Gear^.Y) and LAND_HEIGHT_MASK) = 0) and ((hwRound(Gear^.X) and LAND_WIDTH_MASK) = 0) and ((Land[hwRound(Gear^.Y), hwRound(Gear^.X)]) <> 0);
+
+ if not haveCollision then
+ begin
+ // backup gear location
+ tx:= Gear^.X;
+ ty:= Gear^.Y;
+
+ if RopePoints.Count > 0 then
+ begin
+ // set gear location to the remote end of the rope, the attachment point
+ Gear^.X:= RopePoints.ar[0].X;
+ Gear^.Y:= RopePoints.ar[0].Y;
+ end;
+
+ CheckCollision(Gear);
+ // if we haven't found any collision yet then check the other side too
+ if (Gear^.State and gstCollision) = 0 then
+ begin
+ Gear^.dX.isNegative:= not Gear^.dX.isNegative;
+ Gear^.dY.isNegative:= not Gear^.dY.isNegative;
+ CheckCollision(Gear);
+ Gear^.dX.isNegative:= not Gear^.dX.isNegative;
+ Gear^.dY.isNegative:= not Gear^.dY.isNegative;
+ end;
+
+ haveCollision:= (Gear^.State and gstCollision) <> 0;
+
+ // restore gear location
+ Gear^.X:= tx;
+ Gear^.Y:= ty;
+ end;
+
+ // if the attack key is pressed, lose rope contact as well
+ if (Gear^.Message and gmAttack) <> 0 then
+ haveCollision:= false;
+
+ HHGear^.dX.QWordValue:= HHGear^.dX.QWordValue shr 2;
+ HHGear^.dY.QWordValue:= HHGear^.dY.QWordValue shr 2;
+ if not haveCollision then
+ begin
+ if (Gear^.State and gsttmpFlag) <> 0 then
+ begin
+ PlaySound(sndRopeRelease);
+ if Gear^.Hedgehog^.CurAmmoType <> amParachute then
+ RopeWaitCollision(Gear, HHGear)
+ else
+ RopeDeleteMe(Gear, HHGear)
+ end
+ end
+ else
+ if (Gear^.State and gsttmpFlag) = 0 then
+ Gear^.State := Gear^.State or gsttmpFlag;
+end;
+
+procedure RopeRemoveFromAmmo(Gear, HHGear: PGear);
+begin
+ if (Gear^.State and gstAttacked) = 0 then
+ begin
+ OnUsedAmmo(HHGear^.Hedgehog^);
+ Gear^.State := Gear^.State or gstAttacked
+ end;
+ ApplyAmmoChanges(HHGear^.Hedgehog^)
+end;
+
+procedure doStepRopeAttach(Gear: PGear);
+var
+ HHGear: PGear;
+ tx, ty, tt: hwFloat;
+begin
+ Gear^.X := Gear^.X - Gear^.dX;
+ Gear^.Y := Gear^.Y - Gear^.dY;
+ Gear^.Elasticity := Gear^.Elasticity + _1;
+
+ HHGear := Gear^.Hedgehog^.Gear;
+ DeleteCI(HHGear);
+
+ if (HHGear^.State and gstMoving) <> 0 then
+ begin
+ if TestCollisionXwithGear(HHGear, hwSign(HHGear^.dX)) then
+ SetLittle(HHGear^.dX);
+ if HHGear^.dY.isNegative and (TestCollisionYwithGear(HHGear, -1) <> 0) then
+ HHGear^.dY := _0;
+
+ HHGear^.X := HHGear^.X + HHGear^.dX;
+ Gear^.X := Gear^.X + HHGear^.dX;
+
+ if TestCollisionYwithGear(HHGear, 1) <> 0 then
+ begin
+ CheckHHDamage(HHGear);
+ HHGear^.dY := _0
+ //HHGear^.State:= HHGear^.State and (not (gstHHJumping or gstHHHJump));
+ end
+ else
+ begin
+ HHGear^.Y := HHGear^.Y + HHGear^.dY;
+ Gear^.Y := Gear^.Y + HHGear^.dY;
+ HHGear^.dY := HHGear^.dY + cGravity;
+ if (GameFlags and gfMoreWind) <> 0 then
+ HHGear^.dX := HHGear^.dX + cWindSpeed / HHGear^.Density
+ end;
+
+ tt := Gear^.Elasticity;
+ tx := _0;
+ ty := _0;
+ while tt > _20 do
+ begin
+ if ((hwRound(Gear^.Y+ty) and LAND_HEIGHT_MASK) = 0) and ((hwRound(Gear^.X+tx) and LAND_WIDTH_MASK) = 0) and ((Land[hwRound(Gear^.Y+ty), hwRound(Gear^.X+tx)] and $FF00) <> 0) then
+ begin
+ Gear^.X := Gear^.X + tx;
+ Gear^.Y := Gear^.Y + ty;
+ Gear^.Elasticity := tt;
+ Gear^.doStep := @doStepRopeWork;
+ PlaySound(sndRopeAttach);
+ with HHGear^ do
+ begin
+ State := State and (not (gstAttacking or gstHHJumping or gstHHHJump));
+ Message := Message and (not gmAttack)
+ end;
+
+ RopeRemoveFromAmmo(Gear, HHGear);
+
+ tt := _0;
+ exit
+ end;
+ tx := tx + Gear^.dX + Gear^.dX;
+ ty := ty + Gear^.dY + Gear^.dY;
+ tt := tt - _2;
+ end;
+ end;
+
+ CheckCollision(Gear);
+
+ if (Gear^.State and gstCollision) <> 0 then
+ if Gear^.Elasticity < _10 then
+ Gear^.Elasticity := _10000
+ else
+ begin
+ Gear^.doStep := @doStepRopeWork;
+ PlaySound(sndRopeAttach);
+ with HHGear^ do
+ begin
+ State := State and (not (gstAttacking or gstHHJumping or gstHHHJump));
+ Message := Message and (not gmAttack)
+ end;
+
+ RopeRemoveFromAmmo(Gear, HHGear);
+
+ exit
+ end;
+
+ if (Gear^.Elasticity > Gear^.Friction)
+ or ((Gear^.Message and gmAttack) = 0)
+ or ((HHGear^.State and gstHHDriven) = 0)
+ or (HHGear^.Damage > 0) then
+ begin
+ with Gear^.Hedgehog^.Gear^ do
+ begin
+ State := State and (not gstAttacking);
+ Message := Message and (not gmAttack)
+ end;
+ DeleteGear(Gear);
+ exit;
+ end;
+ if CheckGearDrowning(HHGear) then DeleteGear(Gear)
+end;
+
+procedure doStepRope(Gear: PGear);
+begin
+ Gear^.dX := - Gear^.dX;
+ Gear^.dY := - Gear^.dY;
+ Gear^.doStep := @doStepRopeAttach;
+ PlaySound(sndRopeShot)
+end;
+
+end.