[9596] Use area trigger zone check for inn leave case.

This is still have false cases but will more correct for specific area triggers.
Also let cleanup code and store less data for Player.

src/game/DBCStores.cpp

@@ -837,6 +837,51 @@ uint32 const* GetTalentTabPages(uint32 cls)
     return sTalentTabPages[cls];
 }
 
+bool IsPointInAreaTriggerZone(AreaTriggerEntry const* atEntry, uint32 mapid, float x, float y, float z, float delta)
+{
+    if (mapid != atEntry->mapid)
+        return false;
+
+    if (atEntry->radius > 0)
+    {
+        // if we have radius check it
+        float dist2 = (x-atEntry->x)*(x-atEntry->x) + (y-atEntry->y)*(y-atEntry->y) + (z-atEntry->z)*(z-atEntry->z);
+        if(dist2 > (atEntry->radius + delta)*(atEntry->radius + delta))
+            return false;
+    }
+    else
+    {
+        // we have only extent
+
+        // rotate the players position instead of rotating the whole cube, that way we can make a simplified
+        // is-in-cube check and we have to calculate only one point instead of 4
+
+        // 2PI = 360°, keep in mind that ingame orientation is counter-clockwise
+        double rotation = 2*M_PI-atEntry->box_orientation;
+        double sinVal = sin(rotation);
+        double cosVal = cos(rotation);
+
+        float playerBoxDistX = x - atEntry->x;
+        float playerBoxDistY = y - atEntry->y;
+
+        float rotPlayerX = float(atEntry->x + playerBoxDistX * cosVal - playerBoxDistY*sinVal);
+        float rotPlayerY = float(atEntry->y + playerBoxDistY * cosVal + playerBoxDistX*sinVal);
+
+        // box edges are parallel to coordiante axis, so we can treat every dimension independently :D
+        float dz = z - atEntry->z;
+        float dx = rotPlayerX - atEntry->x;
+        float dy = rotPlayerY - atEntry->y;
+        if( (fabs(dx) > atEntry->box_x/2 + delta) ||
+            (fabs(dy) > atEntry->box_y/2 + delta) ||
+            (fabs(dz) > atEntry->box_z/2 + delta) )
+        {
+            return false;
+        }
+    }
+
+    return true;
+}
+
 // script support functions
 MANGOS_DLL_SPEC DBCStorage <SoundEntriesEntry>  const* GetSoundEntriesStore()   { return &sSoundEntriesStore;   }
 MANGOS_DLL_SPEC DBCStorage <SpellEntry>         const* GetSpellStore()          { return &sSpellStore;          }