JUCE math interop layer

[rpavlik]

The JUCE framework (GPL, or alternately licenses available for purchase) is used by at least one OSVR user-developer. An interop header akin to https://github.com/OSVR/OSVR-Core/blob/master/inc/osvr/Util/EigenInterop.h (except without the "mapping" aspect, doesn't appear supported by JUCE's math types), included in OSVR-Core and licensed as Apache License 2.0 (so compatible with either proprietary license or GPL3 modules), would likely be useful.

Relevant reference pages (note that in their class naming, 3D just means three-dimensional, not 3-dimension, double as scalar type)

• http://www.juce.com/api/classQuaternion.html
• http://www.juce.com/api/classVector3D.html
• http://www.juce.com/api/classMatrix3D.html - actually a 4x4 matrix