I would need some basic vector mathematics constructs in an application. Dot product, cross product. Finding the intersection of lines, that kind of stuff.

I can do this by myself (in fact, have already) but isn't there a "standard" to use so bugs and possible optimizations would not be on me?

Boost does not have it. Their mathematics part is about statistical functions, as far as I was able to see.

**Addendum:**

Boost 1.37 indeed seems to have [this](http://www.boost.org/doc/libs/1_37_0/libs/numeric/ublas/doc/overview.htm). They also gracefully introduce a number of other solutions at the field, and why they still went and did their own. I like that.