[Genma Saotome]

I posted this short video on youtube... that's a lot of jiggling. It's in Open Rails. Does anyone else have the same effect going on?

[NSL Fan]

I had the same problem, and adjusted by adjusting the camera focus back one "car" to the carbody section of the Boxcab, rather than the leading truck section.

ZAch

[Fred]

NSL Fan, on 23 July 2016 - 08:02 PM, said:

I had the same problem, and adjusted by adjusting the camera focus back one "car" to the carbody section of the Boxcab, rather than the leading truck section.

ZAch

Thanks for the info, ZAch. I had the same problem and that solved it for me.

[Genma Saotome]

Me too.

But now I'm wondering why that worked... what is it about the lead unit that caused all that jiggle? And it wasn't just down low at track level, you could raise the camera and see the jiggle in the gantry poles.

[copperpen]

Something in the way it is modelled is the cause of the jiggling. If you move one unit back and drop to the same level as the running gear looking forwards, the whole thing shakes and shimmies along the track. The action over switches is eye watering.

[Jovet]

Probably the same thing that the physics is just not tuned or designed to handle. Having the camera locked onto a FRED "car" at the end of a train always gave peculiar vibration so I just avoid having the camera locked onto one.

[copperpen]

Not sure about that. It is a 27.5 ton wag with two two axle bogies so in theory should be rock steady.

[Genma Saotome]

I was finally able to construct a .con file for the EF-5 set that looks correct and when running it noticed that the camera tracking of the first "unit" was smoother than the second. The second unit is the .eng file, the firs a .wag.

Perhaps the solution to camera jitter is to save n number of frames of the Y axis value of the attached unit and average them. It will move the camera up or down as the locomotive changes elevation due to the track grade (as it should) as well as dampen unexplained jitter and the occasional bad track joint.

Mervyn, why does mass() come into play for how well the unit behaves WRT the camera? I can see it does in reality... but why in a SIM? And if it is necessary, sure that 27.5 ton example you cite should indeed by rock steady. Something still feels wrong here, don't you think?

[copperpen]

Dave

I was thinking along the lines of the FRED which was lightweight, but on reflection, it was the lack of bogies and wheels and the extremely small size that caused the wiggle of that bit of kit. I have observed the EF3 lead wag in action by just releasing the brakes and rolling down a slight grade.

The lead bogie is rocksteady. The trail bogie does the jitterbug and also moves the frame (which seems to have a pivot point at the front) which is the cause of the jittery view. As for why, I have no idea right now.

[Zecora]

It's not just the boxcabs that this happens to, and it's not exclusive to this route. This also happens with the steam heating invis-wagon on TS which was made with the MILW RMD-East in mind. Once again, when you switch to the wagon in front of it, the jiggle goes away. It also happens with something else that I had, but I can't remember what it was.