Simple task, but I fail - view to view animation


#1

Hi,

I need to render an animation of train on a railway. Since moving the complex train model cost scene preparation time for each frame I tried to move the camera along the railway. At the end I need a litte sideward camera movement for showing some different configurations (slide show of still images).

After a few hour of testing different ways I don’t get it. Attached a very simplified example model.



At the file can be found a simpliest way - I tried to use the named views. The animation looks chaotic.
ScreenShot9630

From Enscape I know the simply workflow to save views as keyframes and I get a smooth path from view to view. Can this be done per Bongo too?

I hope did something stupid and there is an easy solution. :wink:

Best-
Micha

Train on the railway.3dm (287.3 KB)


#2

Here the animation path of the named view animation: between A1 and A2 I got an unwanted additional turn.

An other way - I tried to animate the camera like an object without to independent set camera and target. I found no direct way and so I use a trick - the camera is “set along path” to a short line. This line is my camera object and I can animate it like a camera object. It works, but again I get an unwanted extra turn between the last two keyframes.
(Topview, mangenta line is the camera object)

Here the file for this setup:
Train on the railway 001.3dm (287.7 KB)


#3

Finally I got the camera-curve-object way running. It looks like I have problem to understand and use all the technical parameters for the curve smoothing. Maybe at Bongo 3 it can be easier to use (wish).

An interesting problem for the development could be, that the time line preview shows an other animation as the keyframe by keyframe clicked preview. I suppose so the fast scene update doesn’t right update all objects. (see attached file - bug?)

My little challenge bring me to an other wish - please allow to animate the camera like an object. My workaround is only a dirty workaround, but the usage is easier than by source/target paths. Per paths I don’t got a stable solution, it was not possible at the beginning to keep the constant orientation of the camera to the rail way if at the end a side turn needs to be added.

And I don’t see a way to get a simple “named view” transition animation running. There seems to be no tweening options. (UI bug?)

Train on the railway 002.3dm (289.0 KB)


(Luc Adriaenssen) #4

Micha,

An interesting quest, thank you for sharing.

Your solution to combine a ‘Camera LookAlong” constraint with a moving curve is resourceful. The NamedViewAnimation technique is rather basic and meant to facilitate architectural practice (walk through animation) as is described in the movie on http://bongo.rhino3d.com/page/animating-named-views. Indeed the only tweening setting is the optional use of ‘spherical tweening’. The technique isn’t suited for fine-tuned camera travels.

You are certainly right; the use of separate target and camera manipulation on the other hand is cumbersome and laborious. So yes the idea to animate the camera (camera-point and target) like an object is obvious. It must surely be taken in account in the development of Bongo 3.

Yes: a bug: the LookAlong of the camera isn’t update in Preview.

And finally: Tweening indeed isn’t a simple mechanism. You can read about it on a Bongo-page http://bongo.rhino3d.com/page/tweening-1. The effects of the Tensions parameter are hard to grasp and combination of the default Auto-Easing with the tweening settings can complicate stuff.
I’ll consider to make a tutorial on the subject.

Luc


#5

Hi Luc,

thank you for the insights. Helped me to better understand Bongo. I hope the little bug fix will be possible for a new SR.

-Micha