Why isn't this code working?

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#1

I’m currently trying to rotate a vector onto the camera plane.

((camera.CFrame.Rotation * CFrame.new(hum.MoveDirection)).Position

This code is supposed to add the movedirection vector of the humanoid to the rotation of the camera, but it doesn’t. The reason why I need this, is because I’m trying to “unlock” the character movement. Usually you can only move on a plane that looks like this: 0, 1, 0. Flat. But I want the plane of movement to be parallel to the orientation of the camera. If you were looking directly down, pressing w would allow you to move directly down, A, left, and S up. Don’t worry about how I’m getting the character to move directly up, I just need this vector.

How do you rotate a vector?

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#2

I think the problem could be because you are using the movement of the player and not the LookVector of the HumanoidRootPart, but that could just be me, from what I know this way you will only get your effect if your are moving

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#3

So you’re saying I should do

((camera.CFrame.Rotation * CFrame.new(hum.MoveDirection)).LookVector
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#4

No instead of hum.MoveDirection maybe use hum.LookVector? I’m not a programmer so I’m not sur if it will work

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#5

hum.LookVector doesn’t exist. That’s not a valid property of Humanoid

#6

And also, I’m not sure but wouldn’t your code affect the camera and not the player? As I said I’m not a programmer so…

#7

Oh then try doing that for the HumanoidRootPart?

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#8

I see, but unfortunately that won’t solve my problem, because the humanoidrootpart always looks forward.

#9

Oh, then I don’t know sorry :person_shrugging:

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#10

camera.CFrame.LookVector will point in the direction of the camera

#11 
function rotateVectorAround( v, amount, axis )
	return CFrame.fromAxisAngle(axis, amount):VectorToWorldSpace(v)
end

Simple as that! x

#12

I’ve seen this code before on devforum, I think it was by @ThanksRoBama . But I don’t understand it.

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#13

Ok, I’m not a programmer but I think I might be able to explain it, first, the

function rotateVectorAround( v, amount, axis )

This should create a function that gets when the vector is rotated, I don’t know what v is, but amount should be the offset (ex. 130) and the axis is the axis, now

return CFrame.fromAxisAngle(axis, amount):VectorToWorldSpace(v)

This returns the CFrame with the axis and the offset (ex. 130 on the X axis) but I don’t know what VectorToWorldSpace means, sorry, and now

end

This is probably the hardest part to understand of the script, it ends the script.

Sorry, I’m not a programmer, I don’t garantee that this is what the script means, but from my little understanding of scripts this is what I interpreted from it, have a good day/night

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#14

can’t you just like renderstepped the camera cframe to -4 z behind the player’s head in objectspace

#15

I don’t think everyone understands what I’m trying to do. Right now with normal character physics, you can only move forward, backwards, left, and right. I want the character to be able to move in those same directions, but relative to the camera. How? What math would I need?

#16

Ok, you first have to get the axis and offset of the camera, @0hJudas’s script does that, and after that you will have to modify the behaviour of the commands of the movement of the player, from what I understand you are trying to make the effect of being underwater in first person but In third person and out of the water? Right?

#17

No, this is because in my game you are in space, so I need the character to move in relation to where you are looking, not based on the world axis.

#18

Could you explain the practicality of this? I don’t understand CFrame.fromAxisAngle(). I’ve never used it.

#19

Ok, then you could try and fill the world with a block and make a script that makes the player have the swimming state activated, but there’s still the problem of the camera thing, but this would make the problem of going up/down solved

#20

That’s a really good idea, but I want there to be some kind of ball physics. Swimming is just linear. I want them to be able to speed up, slow down etc.