Yep – this is intentional!

61 fps?!! Who says you’re getting an extra fps? 😉

Ben,
Thanks for taking the time and explaining.
please focus on the 61FPS and VR support 🙂

Although interested if you (LM) are thinking about outsourcing some non-critical tasks to partners (addon developers) or community. The whole traffic engine could be improved by an addon? Assuming the current SDK can handle Replay info.

BR and keep up the exceptional work!
Khaled

Please make the 60 fps, stutter free issue first… Please… 🙂

Right – here’s what’s going on:
– The “local” position of the cars is based on a strict time-based interpolation between its source and destination end point on a given road segment that has no branches or merges. We don’t even save the car position – we save the segment and calculate the car location on demand if and only if it’s drawn. (We know if it will be drawn by the overall size of the entire segment.) So change time and replay works great.

– Buuuut we never save the history of driving decisions the car makes. If you back time up to a 4-way intersection, we have no way of knowing if the car went straight, turned left or right to get where it is, or was spawned. So we simply clamp the car to its past position rather than changing its segment.

I’m not sure if we’ll ever change this…we get a lot of requests for better car replay because people want to make videos, but there are a LOT of cars in the x-plane world and they would generate a pretty long driving history pretty fast.

There are “clever” things we can do (e.g. use the car’s ID to make a pre-determined set of navigation directions, then we can know how it went without storage) but it’s also a question of time – do you want me working to get us to 60 fps and stutter free, or really making the greatest traffic-jam sim ever.

Vk, I noticed when you first load a replay, the cars move. It’s when you start dragging the playback slider back and forth, or use the high speed playback button, then they stop. (most of the time 😉 )

Yes, the folder is shrinking, no problem, I found that poor performance blamed me, there were programs running in the background. Sorry.