use projection mode on sphere
fix up/down navigation
refactor code

after first import, configuring all the native dylibs on 1st build was taking too long.
with this change, it takes no time.

Martin Finkel authored 2 months ago and Martin Finkel committed 2 months ago

When the Editor is configured to target Android devices, users can
still run scenes within the Unity Editor, which runs on Windows.

Close #240

Fix #164

#225

#216