AI chooses the closest deposit to build an extractor

Assets/Scripts/Core/player.lua

@@ -55,14 +55,15 @@ function Player:buildExtractor()
 	self:selectUnits({engineer})
 
 	deposits = self:getResourceDeposits()
-	depPos = nil
+	if #deposits == 0 then return false end
 
-	if #deposits > 0 then
-		depPos = deposits[1]:getPos()
-	end
+	depPos = deposits[1]:getPos()
+	spawnPoint = self:getSpawnPoint()
 
-	if depPos == nil then
-		return false
+	for i = 1, #deposits do
+		if deposits[i]:getPos():getDistanceFrom(spawnPoint) < depPos:getDistanceFrom(spawnPoint) then
+			depPos = deposits[i]:getPos()
+		end
 	end
 
 	extractor = GameObjectFactory.createUnit(self, UnitId.EXTRACTOR, depPos, Quaternion:new(1, 0, 0, 0), 0)

gameManager.cpp

@@ -111,6 +111,7 @@ namespace battleship{
 			"y", &Vector3::y,
 			"z", &Vector3::z,
 			"norm", &Vector3::norm,
+			"getDistanceFrom", &Vector3::getDistanceFrom,
 			"add", [](Vector3 v1, Vector3 v2){return v1 + v2;},
 			"subtr", [](Vector3 v1, Vector3 v2){return v1 - v2;},
 			"mult", [](Vector3 v1, float s){return v1 * s;},