Unity Script Reference:
Legacy Documentation: Version 4.3.0
UnwrappingNamespace: UnityEditor
Description

This class holds everything you may need in regard to uv-unwrapping.

WARNING: preliminary interface, will be changed in future versions e.g. in future it will contain possibility to pack your uvs optimally etc.
Constructors
Unwrapping
Static Functions
GeneratePerTriangleUV Will generate per-triangle uv (3 uv pairs for each triangle) with default settings.
GenerateSecondaryUVSet Will auto generate uv2 with default settings for provided mesh, and fill them in.