Rotation causes weird movement bug

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#1

Hello everyone! I am currently making a traditional 2.5D Fighting Game and is struggling with some issues, the one I am writing about however is the most dominant one.

Context:

So, like in any fighting game I have the player’s constantly looking at each other, no matter what side of the arena they are in.

Source Code:

-- Constant Variables

local Player: Player = game.Players.LocalPlayer
local Character: Model = Player.Character or Player.CharacterAdded:Wait()
local Humanoid: Humanoid = Character:WaitForChild('Humanoid')
local HumanoidRootPart: Part = Character:WaitForChild('HumanoidRootPart')

-- Requires

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

-- Prerequisites
Humanoid.AutoRotate = false
Humanoid:SetStateEnabled(Enum.HumanoidStateType.Climbing, false)

repeat wait() until #PlayerService:GetPlayers() >= 2 


-- Runtime Variables

local ePlayer: Player

for _, players in pairs(PlayerService:GetPlayers()) do
	
	if players.Name ~= Player.Name then
		ePlayer = players
	end
	
end

local eCharacter: Model = ePlayer.Character or ePlayer.CharacterAdded:Wait()
local eHumanoidRootPart: Part = eCharacter:WaitForChild('HumanoidRootPart')

-- Main Code Execution

local function LookAtOppositePlayer()
	
	local TargetPos = eHumanoidRootPart.Position
	local Direction = (TargetPos - HumanoidRootPart.Position).Unit
	local Angle = math.atan2(Direction.X, Direction.Z)
	
	Angle += math.pi
	
	HumanoidRootPart.CFrame = CFrame.new(HumanoidRootPart.Position) * CFrame.Angles(0, Angle, 0)
	
end

RunService:BindToRenderStep("LookAtOppositePlayer", 1, LookAtOppositePlayer)

Issue:

The Issue is that when jumping above a player’s head, the other player can run through the empty space made by the jump

[Context Image]:

image
image285×516 25.5 KB

(Continuation of sentence before Context Image): When a player does run through that empty space, both players are locked in a feedback loop of always going backwards as shown in this demonstration:

Other Information:

You can get out of this by pressing jump, but I’d rather avoid this problem entirely.

Conclusion:

If anyone can help with this issue that’ll be amazing! Any help is appreciated!

3 Likes
#2

Just off the top of my head, could try using CFrame.lookAt(playerPosition, enemyPosition)

You’ll have to make the Y value of the enemyPosition’s Vector3 equal to the playerPosition’s Y value, or else you’ll have them floating and rotating to look up in the air and all that, lol

1 Like
#3

Sorry, I’m having trouble visualizing that, can you explain further?

1 Like
#4

It’s simple, like

PlayerCFrame = CFrame.lookAt(playerPosition, Vector3.new(enemyPosition.X, playerPosition.Y, enemyPosition.Z))

The Vector3 is the enemy’s X and Z values. If you have the player look at the Y value too, they’ll turn sideways to look up and down instead of just forward toward the enemy lol

1 Like
#5

It turned out like this, do you need more information?

1 Like
#6

Try defining the HumanoidRootParts inside the function, them being outside of it could register as them being at (0,0,0), which is where all players spawn without a spawn point.

1 Like
#7

It could also just be the extra math you have. Maybe remove everything except what I showed you and try again.

1 Like
#8

Still the exact same :pensive:

Code now:

-- Constant Variables

local Player: Player = game.Players.LocalPlayer
local Character: Model = Player.Character or Player.CharacterAdded:Wait()
local Humanoid: Humanoid = Character:WaitForChild('Humanoid')

-- Requires

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

-- Prerequisites
Humanoid.AutoRotate = false
Humanoid:SetStateEnabled(Enum.HumanoidStateType.Climbing, false)

repeat wait() until #PlayerService:GetPlayers() >= 2 


-- Runtime Variables

local ePlayer: Player

for _, players in pairs(PlayerService:GetPlayers()) do
	
	if players.Name ~= Player.Name then
		ePlayer = players
	end
	
end

local eCharacter: Model = ePlayer.Character or ePlayer.CharacterAdded:Wait()

-- Main Code Execution

local function LookAtOppositePlayer()
	--[[
	local TargetPos = eHumanoidRootPart.Position
	local Direction = (TargetPos - HumanoidRootPart.Position).Unit
	local Angle = math.atan2(Direction.X, Direction.Z)
	
	Angle += math.pi
	]]--
	local eHumanoidRootPart: Part = eCharacter:WaitForChild('HumanoidRootPart')
	local HumanoidRootPart: Part = Character:WaitForChild('HumanoidRootPart')
	HumanoidRootPart.CFrame = CFrame.lookAt(HumanoidRootPart.Position, Vector3.new(eHumanoidRootPart.Position.X, HumanoidRootPart.Position.Y, eHumanoidRootPart.Position.X))
	
end

RunService:BindToRenderStep("LookAtOppositePlayer", 1, LookAtOppositePlayer)
#9

Oof. The NPCs I make use CFrame.lookAt to look at the nearest player and they dont do that, not sure what’s happening, sorry lmao

1 Like
#10

It’s alright man, thanks for trying!

1 Like