Odd Behavior with Raycast Normals

Help and Feedback Scripting Support
#1

Hello everyone! I’m currently doing some work with raycast normals, and I’ve come across this really weird behavior, as seen in this video here

That’s obviously just a demo of the issue, but I’m really stumped on what the root cause is. My code is below, if that helps (just a mockup for testing).

local function ray(pos)
	return workspace:Raycast(pos,Vector3.new(0,-100,0))
end

script.Parent:WaitForChild("Part").Changed:Connect(function()
	local r = ray(script.Parent.Part.Position)
	if r then
		script.Parent.Snap.CFrame = CFrame.new(r.Position,r.Position + r.Normal)
	end
end)

Any help is greatly appreciated, I’m genuinely confused as to what’s going on.

2 Likes
#2

What do you mean by “Odd Behavior”?
Do you mean that it’s offset?

#3

I think its the rotation shown in the video on the part moving below, it rotates 90 degrees left as it seems

#4

I believe its because your using Position instead of CFrame (r.Position,r.Position…

#5

Yes, that is the issue I’m experiencing right now.

#6

If you are using the CFrame.new() method you will need to take into account the previous right vector.

You can use cross product like below

	local rightVector = (bg.CFrame.lookVector:Cross(upVector)).Unit

Or use a different rotation method:

1 Like
#7

Tysm! This helped me fix the problem!

#8

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