C++/WinRT

Windows on ARM is now Windows RT
Windows RT is a system BUT winRT is an engine working on all platforms. 可以用来开发Windows应用

Windows.Foundation.Numerics

provides a standard set of graphics-oriented types

matrix, plane, quaternion, vector2, vector3, vector4

## Windows.Perception Contains classes for perceiving the user's surroundings, letting apps locate and reason about the device relative to the surfaces and holograms around the user.

PerceptionTimestamp

Windows.Perception.Spatial

Contains classes for reasoning about the spatial relationships within the user's surroundings.