Vector functions?

Super-stupid beginner question:

Are there any super-duper-optimized-and-hence-officially-recommended vector funtions that you guys like to use?

I found some on Rosetta Code, but I'm looking for the 2-dimensional kind.

Any recommendations?

Strange that FF does not come with its own lua vector class.

How about implementing something like Lua-Vec?

If one were to believe this benchmark... *hint hint*

Excellent!

Quote
SpaceRay wrote: sorry this looks like chinese words for me Could you explain what use can this have please?

Yeah, what he said

I know I want to see vectors in FF, that would be super cool, but what do you mean by "vector functions"?

vector graphics ≠ vector

Not sure what type of vector functions you're thinking of. Rotating a vector, finding it's length, translating it, normalizing it - what else were you thinking of? The formulas for all of these are pretty simple:

Length of vector (x, y): Sqrt(x * x + y * )

Rotating vector (x, y) by angle t: (x * Cos(t) - y * Sin(t), x * Sin(t) + y * Cos(t))

Translate vector(x, y) by vector(tx, ty): (x + tx, y + ty)

Normalize a vector (x, y): (x / length(x, y), y / length(x, y))

Are you thinking of anything else? I guess to give full linear transforms you should be able to scale also -

Scale vector (x, y) by factor s: (x * s, y * s)

Reflect around y axis: (-x, y)

Reflect around x axis: (x, -y)

ThreeDee, you're right.
Vectors are the key to computer graphics. Both 2D and 3D.
In my younger days I studied some of this in college, but I don't remember any of it these days....