Fixed the raycasting of ZONE_POLYGON_BASE

- The raycasting was wrong when the vertices of the polygon were not
closed.
Now after this fix, the raycasting of the polygon is correctly
performed. The begin and end vertices of the polygon don't need to be
closed anymore within the mission editor. Check the test mission
Moose_Test_ZONE_POLYGON.miz

Moose Development/Moose/Zone.lua

@@ -490,33 +490,34 @@ end
 
 
 --- Returns if a location is within the zone.
+-- Source learned and taken from: https://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
 -- @param #ZONE_POLYGON_BASE self
 -- @param DCSTypes#Vec2 PointVec2 The location to test.
 -- @return #boolean true if the location is within the zone.
 function ZONE_POLYGON_BASE:IsPointVec2InZone( PointVec2 )
   self:F2( PointVec2 )
 
-  local i 
-  local j 
-  local c = false
+  local Next 
+  local Prev 
+  local InPolygon = false
   
-  i = 1
-  j = #self.Polygon
+  Next = 1
+  Prev = #self.Polygon
   
-  while i < #self.Polygon do
-    j = i
-    i = i + 1
-    self:T( { i, j, self.Polygon[i], self.Polygon[j] } )
-    if ( ( ( self.Polygon[i].y > PointVec2.y ) ~= ( self.Polygon[j].y > PointVec2.y ) ) and
-         ( PointVec2.x < ( self.Polygon[j].x - self.Polygon[i].x ) * ( PointVec2.y - self.Polygon[i].y ) / ( self.Polygon[j].y - self.Polygon[i].y ) + self.Polygon[i].x ) 
+  while Next <= #self.Polygon do
+    self:T( { Next, Prev, self.Polygon[Next], self.Polygon[Prev] } )
+    if ( ( ( self.Polygon[Next].y > PointVec2.y ) ~= ( self.Polygon[Prev].y > PointVec2.y ) ) and
+         ( PointVec2.x < ( self.Polygon[Prev].x - self.Polygon[Next].x ) * ( PointVec2.y - self.Polygon[Next].y ) / ( self.Polygon[Prev].y - self.Polygon[Next].y ) + self.Polygon[Next].x ) 
        ) then
-       c = not c
+       InPolygon = not InPolygon
     end
-    self:T2( { "c = ", c } )
+    self:T2( { InPolygon = InPolygon } )
+    Prev = Next
+    Next = Next + 1
   end
 
-  self:T( { "c = ", c } )
-  return c
+  self:T( { InPolygon = InPolygon } )
+  return InPolygon
 end
 
 --- Define a random @{DCSTypes#Vec2} within the zone.