Moving over sphere(Earth) - Great circle route?

[purf]

Hi,

huh, haven’t been here for a while, it seems. This place looks different :)

Now: I want to move between two points on a sphere, taking the Great Circle Route (shortest possible distance)
While I can think of a couple of ways to do this, I want to be able to just put coords for origin and destination and be done with it. And this has me stumped for a while now.

ideas?

[antokhio]

well, why don’t u specify your cords in radians and use damper cyclic or something similliar

[nodas]

Hi Purf,
Allow me to suggest you a nice article with a live Google map, where you 'll be able to move two waypoints and see the Great Circle and Rhumb Line in action.
Please follow this link: Great circle or rhumb line
I hope I helped a little…

[mrboni]

If I understand you correctly - you want to be able to move on the surface of a sphere, between two points

If so, look into slerp (spherical lerp)

[id144]

linear interpolate two xyz points on sphere, normalize, multiply by radius

[mrboni]

@id144 - This will work but wont be ‘constant speed’