Why is my double jump script not working?

Help and Feedback Scripting Support
#1

I’ve spent about 2 hours trying to figure out why I can only double jump after walking off a ledge.

Whats the issue?

local UserInputService = game:GetService("UserInputService")
local localPlayer = game.Players.LocalPlayer
local character
local humanoid
 
local canDoubleJump = false
local hasDoubleJumped = false
local oldPower
local TIME_BETWEEN_JUMPS = 0.2
local DOUBLE_JUMP_POWER_MULTIPLIER = 2
 
function onJumpRequest()
	if not character or not humanoid or not character:IsDescendantOf(workspace) or
	 humanoid:GetState() == Enum.HumanoidStateType.Dead then
		return
	end
	
	if canDoubleJump and not hasDoubleJumped then
		hasDoubleJumped = true
		humanoid.JumpPower = oldPower * DOUBLE_JUMP_POWER_MULTIPLIER
		humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
	end
end
 
local function characterAdded(newCharacter)
	character = newCharacter
	humanoid = newCharacter:WaitForChild("Humanoid")
	hasDoubleJumped = false
	canDoubleJump = false
	oldPower = humanoid.JumpPower
	
	humanoid.StateChanged:connect(function(old, new)
		if new == Enum.HumanoidStateType.Landed then
			canDoubleJump = false
			hasDoubleJumped = false
			humanoid.JumpPower = oldPower
		elseif new == Enum.HumanoidStateType.Freefall then
			wait(TIME_BETWEEN_JUMPS)
			canDoubleJump = true
		end
	end)
end
 
if localPlayer.Character then
	characterAdded(localPlayer.Character)
end
 
localPlayer.CharacterAdded:connect(characterAdded)
UserInputService.JumpRequest:connect(onJumpRequest)
1 Like
#2

Put a breakpoint in each function and step through the code, being careful to verify that each condition has the expected value in if statements. That should reveal something

2 Likes
#3 
local localPlayer = game.Players.LocalPlayer
local character
local humanoid
 
local canDoubleJump = false
local hasDoubleJumped = false
local oldPower
local TIME_BETWEEN_JUMPS = 0.2
local DOUBLE_JUMP_POWER_MULTIPLIER = 2
 
function onJumpRequest()
	if not character or not humanoid or not character:IsDescendantOf(workspace) or
	 humanoid:GetState() == Enum.HumanoidStateType.Dead then
		return
	end
	
	if canDoubleJump and not hasDoubleJumped then
		hasDoubleJumped = true
		humanoid.JumpPower = oldPower * DOUBLE_JUMP_POWER_MULTIPLIER
		humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
	end
end
 
local function characterAdded(newCharacter)
	character = newCharacter
	humanoid = newCharacter:WaitForChild("Humanoid")
	hasDoubleJumped = false
	canDoubleJump = false
	oldPower = humanoid.JumpPower
	
	humanoid.StateChanged:connect(function(old, new)
		if new == Enum.HumanoidStateType.Landed then
			canDoubleJump = false
			hasDoubleJumped = false
			humanoid.JumpPower = oldPower
		elseif new == Enum.HumanoidStateType.Freefall then
			wait(TIME_BETWEEN_JUMPS)
			canDoubleJump = true
		end
	end)
end
 
if localPlayer.Character then
	characterAdded(localPlayer.Character)
end
 
localPlayer.CharacterAdded:connect(characterAdded)
UserInputService.JumpRequest:connect(onJumpRequest)

This SUPER similar script works JUST fine though. Which is what I mainly based it off. Why mine won’t work confuses me to shambles. Possibly even the most puzzling thing of my life.

#4

I am now using this script, as I got so sick and tired of trying to figure it out to the point where I’m asking on here if anyone knows.

#5

can you show me where the differences of the two scripts are because there must be something wrong

1 Like
#6

Read both of the scripts please

#7

I’ve teste it as a StarterCharacterScripts on both R6 and R15 and it worked fine without the need of a edge, you should consider reducing the TIME_BETWEEN_JUMPS if you think thats the problem.

2 Likes
#8

You didn’t test this one.

local localPlayer = game.Players.LocalPlayer
local character
local humanoid
 
local canDoubleJump = false
local hasDoubleJumped = false
local oldPower
local TIME_BETWEEN_JUMPS = 0.2
local DOUBLE_JUMP_POWER_MULTIPLIER = 2
 
function onJumpRequest()
	if not character or not humanoid or not character:IsDescendantOf(workspace) or
	 humanoid:GetState() == Enum.HumanoidStateType.Dead then
		return
	end
	
	if canDoubleJump and not hasDoubleJumped then
		hasDoubleJumped = true
		humanoid.JumpPower = oldPower * DOUBLE_JUMP_POWER_MULTIPLIER
		humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
	end
end
 
local function characterAdded(newCharacter)
	character = newCharacter
	humanoid = newCharacter:WaitForChild("Humanoid")
	hasDoubleJumped = false
	canDoubleJump = false
	oldPower = humanoid.JumpPower
	
	humanoid.StateChanged:connect(function(old, new)
		if new == Enum.HumanoidStateType.Landed then
			canDoubleJump = false
			hasDoubleJumped = false
			humanoid.JumpPower = oldPower
		elseif new == Enum.HumanoidStateType.Freefall then
			wait(TIME_BETWEEN_JUMPS)
			canDoubleJump = true
		end
	end)
end
 
if localPlayer.Character then
	characterAdded(localPlayer.Character)
end
 
localPlayer.CharacterAdded:connect(characterAdded)
UserInputService.JumpRequest:connect(onJumpRequest)
#9

This script will throw an error at the final line because “UserInputService” was not declared before, adding this to the first line of code should work :

local UserInputService = game:GetService("UserInputService")