How am I suppose to use the cross product

[runaredie (Fresh Joe)]

So I have been trying to use the :cross() for a while now and don’t understand how it works as I heard you can get a direction from RayCast and then use the direction on a :Cross() and with the return of the :Cross() you can get an orientation to rotate a part off of the first part direction you got from the ray cast
can someone give me some understanding of :Cross() I search on youtube for a whole week now and can’t seem to find any good tutorials on it

[TheCarbyneUniverse (Carbyne)]

The cross product is an operation for two vectors to find a third vector that is perpendicular to both of them. The important aspect of the cross product is determining the order of the operands, which changes the direction of the resulting vector.

It crossed my mind several times on the complexity of it to novice developers, so I’ve made a tutorial, although it’s not specifically on the cross product, the beginning section describes it pretty well with color coding.

Understanding CFrame.fromMatrix() - The Replacement for CFrame.new()

[Return] Hey y’all! Happy Memorial Day to everyone! Always remember to honor those who served in the army to defend their own country. Anyways, I’ve seen that the news of CFrame.new(position, lookAt) (only the one with the Look At) being deprecated has not spread very far. Many people still use this version, which works absolutely fine, but you shouldn’t use deprecated constructors in your code, should you? The new version is CFrame.fromMatrix() which is a little more complicated than the d…

[runaredie (Fresh Joe)]

But how am I suppose to use it like

game.Workspace.Part.Position:Cross(variable1)
-- I think its position your suppose to put

don’t know I suppose to apply the first vector and second vector
and get the perpendicular off a look vector of a part

[TheCarbyneUniverse (Carbyne)]

It has to be another vector as variable1 which the whole thing will return the third vector, so you can store the line in a variable.

[runaredie (Fresh Joe)]

and what should variable1 be direction or position?
also appreciate you replying back

[TheCarbyneUniverse (Carbyne)]

Position is a vector and direction–remember, position represents the vector that goes from the origin to the part’s center, aka how much you need to move in each direction to reach that part. Direction (IDK what exactly you mean by that, I’ll assume orientation) is also a vector.

Basically, anything belonging to Vector3 is eligible for the cross product with another Vector3. I wouldn’t say Vector2 because there wouldn’t be a dimension for the 3rd vector.

[runaredie (Fresh Joe)]

Thanks I’m going to try to play around with :Cross() and get a orientation and by direction I mean like normals you know like
LookVector
hopefully I successfully learn it today