Define vector_extras functions in moremesecons_utils

if vector_extras is not loaded
Loading vector_extras is still recommended because its functions may be more up-to-date.

moremesecons_utils/depends.txt

@@ -0,0 +1 @@
+vector_extras?

moremesecons_utils/init.lua

@@ -24,3 +24,54 @@ function moremesecons.setting(modname, settingname, default, min)
 		return ret
 	end
 end
+
+-- Vector helpers
+-- All the following functions are from the vector_extras mod (https://github.com/HybridDog/vector_extras).
+-- If you enable that mod, its functions will be used instead of the ones defined below
+
+if not vector.get_data_from_pos then
+	function vector.get_data_from_pos(tab, z,y,x)
+		local data = tab[z]
+		if data then
+			data = data[y]
+			if data then
+				return data[x]
+			end
+		end
+	end
+end
+
+if not vector.set_data_to_pos then
+	function vector.set_data_to_pos(tab, z,y,x, data)
+		if tab[z] then
+			if tab[z][y] then
+				tab[z][y][x] = data
+				return
+			end
+			tab[z][y] = {[x] = data}
+			return
+		end
+		tab[z] = {[y] = {[x] = data}}
+	end
+end
+
+if not vector.remove_data_from_pos then
+	function vector.remove_data_from_pos(tab, z,y,x)
+		if vector.get_data_from_pos(tab, z,y,x) == nil then
+			return
+		end
+		tab[z][y][x] = nil
+		if not next(tab[z][y]) then
+			tab[z][y] = nil
+		end
+		if not next(tab[z]) then
+			tab[z] = nil
+		end
+	end
+end
+
+if not vector.unpack then
+	function vector.unpack(pos)
+		return pos.z, pos.y, pos.x
+	end
+end