PiBoSo Official Forum

World Racing Series => Bug Reports => Topic started by: Stout Johnson on December 06, 2017, 06:20:02 pm

Title: Suspension simulation bug
Post by: Stout Johnson on December 06, 2017, 06:20:02 pm
Dear Piboso, glad to see you are working on WRS. Really looking forward to the new beta. Would be really glad if you could adress the suspension simulation bug (it's in there for a long time now, happens for all cars) before releasing the next beta. Would gladly offer to test if there is need.

Here is a video of the bug, towards the end.
https://www.youtube.com/v/ZyQxvHVXils
Title: Re: Suspension simulation bug
Post by: PiBoSo on December 06, 2017, 06:25:40 pm

This is a known limitation of the tyre model when sliding 90 degrees laterally.
Title: Re: Suspension simulation bug
Post by: Stout Johnson on December 06, 2017, 07:14:35 pm
Quote from: PiBoSo on December 06, 2017, 06:25:40 pm

This is a known limitation of the tyre model when sliding 90 degrees laterally.

Ok. Just to make sure we talk about the same, I mean the weird "jumping" of the car before coming to a stand-still. Before the car comes to a stand-still, it moves back and forth even lateraly back to where it came from. Either way, is there a way of possibly fixing this? Does not look sim-like. Otherwise I am having a blast with the RX on Holjes.  :)

OT: Btw, Iracing unveiled its RX content, it does not get very good reviews. Might be a good point to showboat what you got ; ) Are there plans to include race format like this in the near future?
https://www.youtube.com/v/vYgcM2a65g0

Would probably get some attention with your physics, especially since netcode seems to be greatly improved (judging from KRP and MXB).

Title: Re: Suspension simulation bug
Post by: PiBoSo on December 06, 2017, 11:00:58 pm
Quote from: Stout Johnson on December 06, 2017, 07:14:35 pm
Quote from: PiBoSo on December 06, 2017, 06:25:40 pm

This is a known limitation of the tyre model when sliding 90 degrees laterally.

Ok. Just to make sure we talk about the same, I mean the weird "jumping" of the car before coming to a stand-still. Before the car comes to a stand-still, it moves back and forth even lateraly back to where it came from. Either way, is there a way of possibly fixing this? Does not look sim-like. Otherwise I am having a blast with the RX on Holjes.  :)


The spring-like effect doesn't look good at all, but it's not really a problem for the simulation, because it only happens when the tyre is sliding 90 degrees, out of control, so not during normal driving conditions.
Title: Re: Suspension simulation bug
Post by: Stout Johnson on December 07, 2017, 07:04:09 am
Quote from: PiBoSo on December 06, 2017, 11:00:58 pm
The spring-like effect doesn't look good at all, but it's not really a problem for the simulation, because it only happens when the tyre is sliding 90 degrees, out of control, so not during normal driving conditions.

Ok thank you for the explanation. Overall the simulation feels really really good (especially since beta11). Good to know it only affects the simulation in extreme conditions. I like how the RX behaves with RX tyres on dirt and tarmac, overall really believable. I also like how the slicks behave on dirt, also very believable. Overall it feels great.

2 final thoughts/remarks:
Title: Re: Suspension simulation bug
Post by: Phathry25 on December 08, 2017, 12:15:55 am
I believe the bug has to do with pure lateral slip.  Wheels locked, sliding sideways, at low speeds.  Not really an issue IMO.
Title: Re: Suspension simulation bug
Post by: PiBoSo on December 08, 2017, 01:08:25 am
Quote from: Stout Johnson on December 06, 2017, 07:14:35 pm
Are there plans to include race format like this in the near future?


Of course there are plans to properly include heats and joker lap. As soon as possible.
Unfortunately time is never enough when working on multiple projects at the same time  :-[