flyTo using heading/pitch/range

[pjcozzi]

We can say where to fly to and the heading/pitch/roll to look at, but we can't say that we want to fly to a point looking at it from a specific heading/pitch/range.

[mramato]

Technically, flyToBoundingSphere can do this, but you can't specify roll. One day we'll do a big pass and unify a lot of camera functions.

[pjcozzi]

@hpinkos was this part of #3100?

[bagnell]

This is not part of #3100.

[fredj]

+1

[willemvdg]

+1
A more google-earth type of flight would be very useful. Currently, both the start- and end-point get out of view sometimes, which is a little confusing. It would be nice if the camera could look in the direction of the end-point during the flight.