Velocity Movement

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#1

Hello, I’ve been trying to make realistic / gradually accelerating movement for my game simular to that of forsaken.

My issue:
It works but whenever I jump into a wall I stay clinging to the wall.

Example Video:

My script:

local RunService = game:GetService("RunService")
local Playerz = game:GetService("Players")

local Player = Playerz.LocalPlayer

local Character = Player.Character or Player.CharacterAdded:Wait()

local Humanoid = Character:WaitForChild("Humanoid")
local Root = Character:WaitForChild("HumanoidRootPart")
local RootAtt = Root:WaitForChild("RootAttachment")

local Acceleration   = 8
local Deacceleration = 12

local Velocity = Instance.new("LinearVelocity")
Velocity.Attachment0 = RootAtt
Velocity.Name = "Mover"
Velocity.Parent = Root
Velocity.RelativeTo = Enum.ActuatorRelativeTo.World
Velocity.VelocityConstraintMode = Enum.VelocityConstraintMode.Plane
Velocity.PrimaryTangentAxis = Vector3.new(1, 0, 0)
Velocity.SecondaryTangentAxis = Vector3.new(0, 0, 1)
Velocity.MaxForce = 100000

RunService.PreRender:Connect(function(deltaTime)

	local VelocityMovement = coroutine.wrap(function()
		
		local MoveDirection = Humanoid.MoveDirection
		local TargetVelocity = Vector2.new(MoveDirection.X, MoveDirection.Z) * Humanoid.WalkSpeed
		local DeltaVelocity = TargetVelocity - Velocity.PlaneVelocity
		local AccelerationRate = if MoveDirection.Magnitude > 0 then Acceleration else Deacceleration

		--print(math.ceil(Velocity.PlaneVelocity.Magnitude))

		Velocity.PlaneVelocity += DeltaVelocity * AccelerationRate * deltaTime
		
	end)
	
	VelocityMovement()

end)

What I tried to fix this:
Set all parts in the character to massless.
Change the velocity from plane velocity to Vector velocity.
Change player physicalproperties.

1 Like
#2

Well, you can imagine that pressing hard against a surface would increase the friction you experience against it. That is what is happening here, your character is experiencing a force pushing them into the wall, and so you experience increased friction and slowed acceleration from gravity.

You can add a check to make sure the character is not pressing into a wall by raycasting/shapecasting in the direction of their velocity with respect to the deltaTime. If it hits something, they are walking into something.

You could also make the player absolutely slibbery

2 Likes
#3

I fixed it by changing the velocitys max force to be a little less and changing the physical properties of the character


-- StarterPlayer > StarterCharacterScripts

local RunService = game:GetService("RunService")
local Playerz = game:GetService("Players")

local Player = Playerz.LocalPlayer

local Character = Player.Character or Player.CharacterAdded:Wait()

local Humanoid = Character:WaitForChild("Humanoid")
local Root = Character:WaitForChild("HumanoidRootPart")
local RootAtt = Root:WaitForChild("RootAttachment")

local Acceleration   = 6
local Deacceleration = 8

local Velocity = Instance.new("LinearVelocity")
Velocity.Attachment0 = RootAtt
Velocity.Name = "Mover"
Velocity.Parent = Root
Velocity.RelativeTo = Enum.ActuatorRelativeTo.World
Velocity.VelocityConstraintMode = Enum.VelocityConstraintMode.Plane
Velocity.PrimaryTangentAxis = Vector3.new(1, 0, 0)
Velocity.SecondaryTangentAxis = Vector3.new(0, 0, 1)
Velocity.MaxForce = 10000

local customProperties = PhysicalProperties.new(
	0.8,
	0.3,
	0.5,
	1,
	1
)

local function OnCharacterAdded()
	
	for i, v in pairs(Character:GetDescendants()) do
		if v:IsA("BasePart") and v.Name ~= "Accessory" and v:IsA("Accessory") == false then
			
			v.CustomPhysicalProperties = customProperties
			
		end
	end
	
end

RunService.PreRender:Connect(function(deltaTime)

	local VelocityMovement = coroutine.wrap(function()

		local MoveDirection = Humanoid.MoveDirection
		local TargetVelocity = Vector2.new(MoveDirection.X, MoveDirection.Z) * Humanoid.WalkSpeed
		local DeltaVelocity = TargetVelocity - Velocity.PlaneVelocity
		local AccelerationRate = if MoveDirection.Magnitude > 0 then Acceleration else Deacceleration

		--print(math.ceil(Velocity.PlaneVelocity.Magnitude))

		Velocity.PlaneVelocity += DeltaVelocity * AccelerationRate * deltaTime 

	end)

	VelocityMovement()

end)

Player.CharacterAppearanceLoaded:Connect(OnCharacterAdded)

Why I didn’t choose to use raycast? I’m making a combat game which will really limit the player’s movement if I stop the velocity when it hits a target, for example when I want to make a crater on the ragdoll and it get’s stopped because of the velocity raycast this will limit it, obviously you can fix this but I thought this way was more efficient and simple. Thanks to @azavier123 I was able to figure this out.

#4

Thank you for posting this publicly! this is pretty performant and quite nice…
I may include it in my resource FPSys.
I will credit you with a link and even by name if you so request.