Implement Transformers

api.lua

@@ -27,7 +27,8 @@ industrialtest.api.hvPowerFlow=10200
 industrialtest.api.evPowerFlow=40800
 industrialtest.api.ivPowerFlow=163800
 
-local function clamp(num,min,max)
+industrialtest.internal={}
+industrialtest.internal.clamp=function(num,min,max)
 	return math.max(math.min(num,max),min)
 end
 
@@ -43,6 +44,32 @@ industrialtest.api.addPowerStorage=function(meta,capacity,flow,ioConfig)
 	meta:set_int("industrialtest.powerAmount",0)
 	meta:set_string("industrialtest.ioConfig",ioConfig)
 end
+-- \brief Takes rotated node and side and outputs normalized side that can be used for ioConfig lookups
+-- \param pos Vector with node position
+-- \param side Node side. See industrialtest.api.addPowerStorage for possible values
+-- \returns Normalized side or in case of failure side argument back
+industrialtest.api.normalizeSide=function(pos,side)
+	local node=minetest.get_node(pos)
+	-- FIXME: improve code quality there
+	local translation={
+		[0]={
+			1,2,3,4,5,6
+		},
+		[1]={
+			5,6,3,4,2,1
+		},
+		[2]={
+			1,2,3,4,6,5
+		},
+		[3]={
+			6,5,3,4,1,2
+		}
+	}
+	if node.param2>3 then
+		return side
+	end
+	return translation[node.param2][side]
+end
 -- \brief Checks if metadata contains power storage
 -- \param meta MetaDataRef which should be checked
 -- \returns true if metadata contains power storage, false otherwise
@@ -129,7 +156,7 @@ industrialtest.api.addPower=function(meta,amount)
 	local powerAmount=meta:get_int("industrialtest.powerAmount")
 	local powerCapacity=meta:get_int("industrialtest.powerCapacity")
 	local prevPowerAmount=powerAmount
-	powerAmount=clamp(powerAmount+amount,0,powerCapacity)
+	powerAmount=industrialtest.internal.clamp(powerAmount+amount,0,powerCapacity)
 	meta:set_int("industrialtest.powerAmount",powerAmount)
 	return powerAmount-prevPowerAmount
 end