Share the effect from the phong material

This only loads the shader source once instead of 1000 times. Reduces
the time to first frame by a further 30% by massively reducing the
work the main thread has to do at startup. The Qt3DExtras material
classes are convenient but lead to bad practices like this. We should
provide a way to allow them to share the effect easily but still use
the provided materials for their API. Perhaps a new ctor overload that
takes a QEffect pointer would work nicely.

Also fixed some float vs double vs int precision warnings as a drive
by.

Change-Id: I181de8d95841eb88c91c29ef6f45d215da079b98
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

0 files changed, 0 insertions, 0 deletions