Jump w/ Roblox's character physics controller only working on slopes

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#1

Title. I’m experimenting with roblox’s new character physics controllers, and I’m using their default statemachine script. However, the jump they provide only activates on spawn and on slopes.

Stuff I tried:

  • Shapecasting under the player instead of using Roblox’s isControllerActive function
  • Printing every time I press space. For some reason, this works if you just take out all of the jumping logic but using the actual jumping code it only prints on a jump
  • Using a normal Vector3 instead of the JumpImpulse attribute. No dice
  • Messing with the groundsensor’s sense distance

Here is a clip of it in action

External Media

And here is the section of code

local function groundCheck()
	local params = RaycastParams.new()
	params.FilterDescendantsInstances = {character}
	params.FilterType = Enum.RaycastFilterType.Exclude
	
	local groundResult = workspace:Shapecast(ControllerManager.RootPart, Vector3.new(0, -5, 0), params)
	if groundResult then 
		return groundResult
	end
end

-- Manage attribute for configuring Jump power
ControllerManager:SetAttribute("JumpImpulse", Vector3.new(0,750,0))

-- Jump input
local function doJump(actionName, inputState, inputObject)
	print("Jump")
	local groundResult = groundCheck()
	
	if actionName == "Jump" and inputState == Enum.UserInputState.Begin and isControllerActive(ControllerManager.GroundController) and groundResult.Material ~= Enum.Material.Air then
		local jumpImpulse = ControllerManager:GetAttribute("JumpImpulse")
		ControllerManager.RootPart:ApplyImpulse(jumpImpulse)

		character.Humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
		ControllerManager.ActiveController = ControllerManager.AirController

		-- floor receives equal and opposite force
		local floor = ControllerManager.GroundSensor.SensedPart
		if floor then
			floor:ApplyImpulseAtPosition(-jumpImpulse, ControllerManager.GroundSensor.HitFrame.Position)
		end
	end
end

ContextActionService:BindAction("Jump", doJump, true, Enum.KeyCode.Space)

Any help is appreciated. Thanks!

1 Like
#2 
local ContextActionService = game:GetService("ContextActionService")
local ControllerManager = script.Parent:WaitForChild("ControllerManager")
local character = script.Parent

local function groundCheck()
    local params = RaycastParams.new()
    params.FilterDescendantsInstances = {character}
    params.FilterType = Enum.RaycastFilterType.Exclude
    
    local rayOrigin = ControllerManager.RootPart.Position
    local rayDirection = Vector3.new(0, -5, 0)
    
    local rayResult = workspace:Raycast(rayOrigin, rayDirection, params)
    if rayResult then 
        return rayResult
    end
end

-- Manage attribute for configuring Jump power
ControllerManager:SetAttribute("JumpImpulse", Vector3.new(0, 750, 0))

-- Jump input
local function doJump(actionName, inputState, inputObject)
    print("Jump function called")
    local groundResult = groundCheck()
    
    if actionName == "Jump" and inputState == Enum.UserInputState.Begin then
        print("Jump input detected")
        
        if isControllerActive(ControllerManager.GroundController) and groundResult and groundResult.Material ~= Enum.Material.Air then
            print("Ground detected, performing jump")
            
            local jumpImpulse = ControllerManager:GetAttribute("JumpImpulse")
            ControllerManager.RootPart:ApplyImpulse(jumpImpulse)

            character.Humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
            ControllerManager.ActiveController = ControllerManager.AirController

            -- floor receives equal and opposite force
            local floor = ControllerManager.GroundSensor.SensedPart
            if floor then
                floor:ApplyImpulseAtPosition(-jumpImpulse, ControllerManager.GroundSensor.HitFrame.Position)
            end
        else
            print("Jump conditions not met")
        end
    end
end

ContextActionService:BindAction("Jump", doJump, true, Enum.KeyCode.Space)
#3

Untitled - Clipped with Medal.tv No dice. Curiously, not even the prints get outputted when being input on the ground.

#4

Update: no solution yet. For some reason, it allows me to jump whenever I want if the groundcontroller’s GroundOffset is zero.

Any help is appreciated. I’ve been stuck on this ever since I opened the topic.

#5

a little late here, but for future reference: Make sure the ground sensor’s search distance is greater than the controller’s GroundOffset, otherwise it will not work