fix gravity

tools/jetpack.lua

@@ -20,12 +20,18 @@ industrialtest.internal.unpackTableInto(industrialtest.JetpackBase,{
 	part="torso"
 })
 local soundHandles = {}
+local reverseGravityForce = 1
+local movementGravity = tonumber(minetest.settings:get("movement_gravity"))
+
 
 function industrialtest.JetpackBase.update(self, player, inv, itemstack, dtime)
 	local playerName = player:get_player_name()
 	local control = player:get_player_control()
 	if control.jump and self:tryFly(itemstack) then
-		self.addYVelocityClamped(player,1,10)
+		if movementGravity and movementGravity > 10 then
+			reverseGravityForce = 2
+		end
+		self.addYVelocityClamped(player,reverseGravityForce,10)
 		if not soundHandles[playerName] then
 			local pos = player:get_pos()
 			local handle = minetest.sound_play("industrialtest_jetpack_loop", {