# 3D Math

Hi,

I know there is a lot on vector and matrix math to be found on this page. But I’m really having a hard time, getting to the mathematics algorithms I need, to solve my Problems.

Do I miss out some docs?

What I am looking for is a knowledge base, offering the mathematical solution to abstract but complex problems.

For example (and that are Questions, that I’m really trying to get an answer for, right now):

• What do I need to do, to get a Vector3f as the direction from Vector3f posA, to Vector3f posB.
• How do I get a Vector3f as position, on a ray, only having the ray and a distance, the resulting vector shall be away from the rays position.

I don’t mind digging into math. But with a collection of this kind of examples, every one would have easier access to it, I guess.

Thank you, but I know that already.

What I am talking about is the step from “this is how to multiply two Vectors” to “this is how to calculate a direction from one vector to another”.

That could be: “multiply posA with posB and add scalarX.” (I know this is bullocks.)

Hopefully I’m not the only person, fighting with that kinda questions.

Edit: If you mean the real vector math basics, theres tutorials on the web if you cant recover your old school books Vector Math Tutorial for 3D Computer Graphics