# QVM: Quaternions, Vectors, Matrices

### boost/qvm/vec_traits_array.hpp

This header introduces specializations of the vec_traits, deduce_vec and deduce_vec2 templates that make it possible to pass C arrays to any Boost QVM function that takes a vector of matching size.

For example, after #include <boost/qvm/vec_traits_array.hpp>, to compute the dot product of two C arrays, you could use:

    float a[4], b[4];
    float dp = dot(a,b);

To use Boost QVM operator overloads, at least one of the arguments must not be of a built-in type; for example you can't multiply a C array vector by a scalar by using operator*= directly. Use vref to work around this issue:

    float a[4];
    vref(a) *= 42;

See also: ptr_vref