# HG changeset patch
# User sheepluva
# Date 1315620495 -7200
# Node ID 812be8a9692776777a69ad68bb1d5efb71862949
# Parent  f9944a75b350241a60501e2b2440d9c2681ee171
actual rope fix for hogs getting stuck on walls

diff -r f9944a75b350 -r 812be8a96927 hedgewars/GSHandlers.inc
--- a/hedgewars/GSHandlers.inc	Sat Sep 10 03:27:47 2011 +0200
+++ b/hedgewars/GSHandlers.inc	Sat Sep 10 04:08:15 2011 +0200
@@ -1405,7 +1405,7 @@
 var 
     HHGear: PGear;
     len, tx, ty, nx, ny, ropeDx, ropeDy, mdX, mdY: hwFloat;
-    lx, ly: LongInt;
+    lx, ly, cd: LongInt;
     haveCollision,
     haveDivided: boolean;
 
@@ -1446,16 +1446,30 @@
     else
         if (Gear^.Message and gmRight <> 0) then HHGear^.dX := HHGear^.dX + _0_0002;
 
-    if not TestCollisionYwithGear(HHGear, 1) then
-        begin
-        HHGear^.dY := HHGear^.dY + cGravity;
-        if (GameFlags and gfMoreWind) <> 0 then HHGear^.dX := HHGear^.dX + cWindSpeed / HHGear^.Density;
-        end;
-
     // vector between hedgehog and rope attaching point
     ropeDx := HHGear^.X - Gear^.X;
     ropeDy := HHGear^.Y - Gear^.Y;
 
+    if not TestCollisionYwithGear(HHGear, 1) 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;
+
+        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 / HHGear^.Density;
+        end;
+
     mdX := ropeDx + HHGear^.dX;
     mdY := ropeDy + HHGear^.dY;
     len := _1 / Distance(mdX, mdY);