Wall running help

[Spa_rkk]

I am semi-new to scripting I know the basics. Ive been scripting for a year now. But I need help with a wall running script. I know people use raycasting but I dont know what that is. Help would be appreciated.
(Also please dont say I should work on something smaller first because im new. I already know.)

[gertkeno (Gert)]

Your request is very vague so it will be hard to help without giving a full example, which is asking a lot

The basics would be using a Raycast on the player’s CFrame.RightVector to detect walls and something from there. Do the same for the left side which should just be the negative right vector -CFrame.RightVector.

[OfficerlSwearShes19 (バター)]

i think he means this

also
You’re

[AnnoyingOrangeGame]

that is REALLY vague, can you at the very least give some information like if you’ve already made a script but there’s an error or something or would you like to know how to make one

[eggspIicit (dylan)]

@Spa_rkk

know people use raycasting but I dont know what that is.

You’re best bet would be checking these out.
https://developer.roblox.com/en-us/api-reference/function/WorldRoot/Raycast

Intro to Raycasting

How do I raycast in 2021?

Get a starting position Get a direction vector (No, not position. Direction. Like, (goal.Position - start.Position OR -start.Position + goal.Position)) (Use ‘Vector Triangle Method’ to visualize a direction vector) Get a RaycastParams object (Optional, raycast still works without this) local rayParam = RaycastParams.new() rayParam.FilterDescendantInstances = {workspace.IgnoreFolder} rayParam.FilterType = Enum.RaycastFilterType.Blacklist rayParam.___ -- autocomplete will tell you w…

Intro to Raycasting (Basics & Detecting Parts) - Roblox Studio

[Lielmaster (sars)]

You can read the article on how to use Workspace:Raycast

Intro to Raycasting

Here’s a summary of how you perform raycasts.

The arguments for the :Raycast function is :Raycast(origin:Vector3, direction:Vector3, raycastParams:RaycastParams). And the result is a RaycastResult

The RaycastResult is the result of the raycast. If nothing was hit, it would return nil.
The origin is the starting position of the raycast.
The direction is, well the direction, except the distance is also measured in the given Vector3. Vector3.new(1,2) is the same direction as Vector3.new(2,4), but their distance is different.
And lastly the raycastParams. This is used to filter the raycast, including what parts to ignore.

Let’s say you want to perform a raycast, from the character, to the direction its facing.

So let’s set up the variables

local player = game.Players.LocalPlayer
local character = player.Character
local hrp = character:WaitForChild("HumanoidRootPart")

Then the optional variables

local distance = 10 -- How far should the raycast go

Now we are ready to perform raycasts. In order to perform a raycast, you should give the arguments properly. I’m going to setup a function

function Raycast()
	local result = workspace:Raycast()
	return result
end

So first, lets give the origin (start position).

function Raycast()
	local Origin = hrp.Position
	local result = workspace:Raycast(Origin)
	return result
end

Then the direction, multiplied by distance.

function Raycast()
	local Origin = hrp.Position
	local Direction = hrp.CFrame.LookVector
	local result = workspace:Raycast(Origin, Direction*distance)
	return result
end

If you don’t know what CFrame is, there are many tutorials about it.
Anyways, now we can just call the function and it will return the results.

So what can we do about the results. First of all, we can get the position where it hit using RaycastResult.Position, and also the Part that it hit with RaycastResult.Instance. We can use this for our own code. Let’s say, whatever part is hit, it will turn to color Red.

But before that, we need a way to call the function. How about, if the player clicks their left mouse button. So we include this is in our variables

local player = game.Players.LocalPlayer
local character = player.Character
local hrp = character:WaitForChild("HumanoidRootPart")
local mouse= player:GetMouse() -- This

Then the click event at the very bottom

mouse.Button1Up:Connect(function()
	local result = Raycast()
end)

Then we use the result to change the color of whatever part is hit to Red

mouse.Button1Up:Connect(function()
	local result = Raycast()

	local part = result.Instance
	part.Color = Color3.fromRGB(255,0,0)
end)

But wait, what if it hit nothing, it returns nothing and it will error.
Then let’s also check if the result exists

mouse.Button1Up:Connect(function()
	local result = Raycast()

	if result then
		local part = result.Instance
		part.Color = Color3.fromRGB(255,0,0)
	end
end)

Final script

local player = game.Players.LocalPlayer
local character = player.Character
local hrp = character:WaitForChild("HumanoidRootPart")
local mouse= player:GetMouse()

local distance = 10 -- How far should the raycast go

function Raycast()
	local Origin = hrp.Position
	local Direction = hrp.CFrame.LookVector
	local result = workspace:Raycast(Origin, DIrection*distance)
	return result
end

mouse.Button1Up:Connect(function()
	local result = Raycast()

	if result then
		local part = result.Instance
		part.Color = Color3.fromRGB(255,0,0)
	end
end)

Great! Now every time you click your mouse, it performs a raycast and whatever is hit will turn to color Red.

What about the RaycastParams, how can we use it?
First we should create a new RaycastParam object using RaycastParams.new()

Let’s add it in the optional variables

local distance = 10
local raycastParam = RaycastParams.new()

This creates a new object that we can modify. Let’s say you don’t want to hit a specific part, we can add it in the RaycastParam.FilterDescendants table.
Yes, it is a table, and it says descendants, that means there can be multiple parts included, and all children of those parts are also included. Example, including your character model means you want the raycast to ignore all parts of your character.

So now we add all parts that should be ignored. How about a glass wall that is semi-transparent, named “Glass”.

local distance = 10
local raycastParam = RaycastParams.new()
raycastParam.FilterDescendants = {workspace.Glass} -- A table, that includes the glass wall

And now we include the raycastParam into the raycast function

function Raycast()
	local Origin = hrp.Position
	local Direction = hrp.CFrame.LookVector
	local result = workspace:Raycast(Origin, DIrection*distance, raycastParam) -- Third argument
	return result
end

And now, everytime you cast a ray, it always ignores the glass wall we just made

Final Final Script

local player = game.Players.LocalPlayer
local character = player.Character
local hrp = character:WaitForChild("HumanoidRootPart")
local mouse= player:GetMouse()

local distance = 10 -- How far should the raycast go

function Raycast()
	local Origin = hrp.Position
	local Direction = hrp.CFrame.LookVector
	local result = workspace:Raycast(Origin, DIrection*distance)
	return result
end

mouse.Button1Up:Connect(function()
	local result = Raycast()

	if result then
		local part = result.Instance
		part.Color = Color3.fromRGB(255,0,0)
	end
end)local player = game.Players.LocalPlayer
local character = player.Character
local hrp = character:WaitForChild("HumanoidRootPart")
local mouse= player:GetMouse()

local distance = 10
local raycastParam = RaycastParams.new()
raycastParam.FilterDescendants = {workspace.Glass}

function Raycast()
	local Origin = hrp.Position
	local Direction = hrp.CFrame.LookVector
	local result = workspace:Raycast(Origin, DIrection*distance, raycastParam)
	return result
end

mouse.Button1Up:Connect(function()
	local result = Raycast()

	if result then
		local part = result.Instance
		part.Color = Color3.fromRGB(255,0,0)
	end
end)

Note: this is done in a local script, and the color changes are only seen by the player casting the ray.

Edit: spelling mistakes