OpenSpace3D

Please be more specific. What do you mean by tween animation ? add links to videos or samples showing that sort of feature.

this is an example library of tween animation... have a look at the demos http://www.createjs.com/#!/TweenJS

OK I see.

Actually classic animations are made in your 3D modeler.
Interpolation method and speed can be choose by animation types.

For procedural animation there is several plugITs to move objects from a position to an another with speed or TCB curve values.

So what kind of method do you really need ?

i use unity3d a lot and one of its assets, itween.... this asset has the methods i need, or would like to have implemented.... have a look at its documentation.... is it possible to do the same type of animation use the using the curve values in openspace? if so, ignore the feature....

Ok I see better now.

You can make simple translations or orientations between two points with plugITs Object move, Object goto, Object Rotate to ...
But yes an editor to make path animations should be better and there is already an opened issue for this : http://redmine.scolring.org/issues/418

I have to work on it one day :)