How a wallrun script works?(explaination needed)

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#1

  1. What do you want to achieve? I want to make a wallrun script.

  2. What is the issue? I dont know how i can make it i need a explaination of a wallrun script so i can make my own script.

3.What solutions have you tried so far? I dont know how to make it so i couldnt try something.

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#2

Here’s a public wall run module by EgoMoose. If you’d like, you can use it as an example and read what techniques are used.

#3

This is a post that is on the devforums.

#4

I’ve made a quick wall running tech demo a while back. It’s not too hard. It’s not perfect, but it’s the best I could have done within the hour I’ve made it.

How I did it was shoot two raycasts to the right and left of the player’s humanoidrootpart. If one of the raycasts doesn’t return nil, then it may be a wall. If both raycasts hits a solid, I just take the ray with the shortest length. To check if it is a wall, I make sure the raycast normal’s Y is equal to 0, which will mean it is perpendicular to the floor. This will make sure you are running on an actual wall and not a slanted slope. Using the wall normal with a cross product of Vector3.new(0, 1, 0), it will give the direction of the wall. Then I use a BodyVelocity to make the player travel along this direction. I would continually raycast the same function (two sides, in front, etc) in case I hit slanted walls so the player can smoothly transition to different walls. This type of wallrunning is heavily inspired by titanfall 2.

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Having to jump twice to switch walls in wallrunning system?
Having to jump twice to switch walls in wallrunning system?
#5

Wow. I wish I could do that! Dam I need to learn

2 Likes
#6

How do you get the raycast normal’s and the wall normal?

#7

RaycastResult.Normal
https://developer.roblox.com/en-us/api-reference/datatype/RaycastResult

And the wall normal is the set Vector3 value stated.
Vector3.new(0, 1, 0)

You would just need to compare the two values.

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#8

Would you mind sharing the script?

#9

How? Subtracting? Do you do the cross product formula? I don’t understand.

#10

Yes they are talking about the cross product

#11

I tried doing the formula manually, but I found out about vector3:Cross() and I got it now.

#12

Does it work going up instead of running on the side of the wall?

#13

No, I made mine go to the side.
But with tweaking im sure you can make it go up.
I’ll mess around with it later and see if I can make it go upwards

#14

I made mine to the side as well but I tried making it go up but to no avail.

#15

I am really confused, could you explain in more detail please?

#16

Basically, on your Raycast, You want to cross product your Y normal with Vector3.new(0,1,0)
so
Raycast.Normal.Y:Cross(Vector3.new(0,1,0)) Set that number as a BodyVelocity’s Velocity and then multiply it by how fast you want it to go.

#17

How did u handle the jump? did u set the jumpheight to something? also for moving up and down, how did u make it so smooth? mine just makes the char fling

				HRP.CFrame = CFrame.new(HRP.CFrame.Position, Vector3.new(HRP.Position.X + cross.x, HRP.Position.Y + 2, HRP.Position.Z + cross.z))
#18

What I believe he did is used is a force(body position,body velocity, etc) to fling the character to the direction of the ray’s normal and maybe allowing them to jump in the air like using; Humanoid:changestate(Enum.HumanoidStateType.Jumping) and that might have given it the up boost but still falling naturally with Roblox physics.

#19

ah, but as for how he made the player go up and down smoothly?
this is whats happening for me rn

#20

Hi, few years late to the party, how do you calculate the cross product of two different vectors? thank you!