MantisBT - Zandronum |
| View Issue Details |
|
| ID | Project | Category | View Status | Date Submitted | Last Update |
| 0001131 | Zandronum | [All Projects] Bug | public | 2012-10-15 15:16 | 2018-08-23 05:09 |
|
| Reporter | unknownna | |
| Assigned To | | |
| Priority | high | Severity | major | Reproducibility | always |
| Status | new | Resolution | open | |
| Platform | | OS | | OS Version | |
| Product Version | 1.0 | |
| Target Version | | Fixed in Version | | |
|
| Summary | 0001131: Client mispredicts its movement if moving on floors/slopes with negative height values |
| Description | Quote from unknownna
I noticed this while testing Zandronum 1.0 on a KDiZD server. For some reason, the client would start to mispredict its momentum when crossing different heights, for instance when moving across slopes and/or steps.
I think I finally managed to reproduce the prediction error. It seems that the client will jitter if moving on floors/slopes with negative height values. |
| Steps To Reproduce | 1. zandronum.exe -file slope_jitter_01.wad -playdemo 2012.10.15_17.12.25_slope_jitter_01.cld |
| Additional Information | It seems to work a bit better in 98d. There's also some jitter present in 98d, but it's a bit worse in Zandronum 1.0. It seems that cl_ticsperupdate makes a difference here. You seem to jitter a lot more if it's set to 1. |
| Tags | No tags attached. |
| Relationships | | related to | 0002294 | closed | | Very evident misprediction of movement on raising floors in general |
|
| Attached Files |  slope_jitter_01.wad (13,724) 2012-10-15 15:16
https://zandronum.com/tracker/file_download.php?file_id=815&type=bug
2012.10.15_17.12.25_slope_jitter_01.cld (26,051) 2012-10-15 15:16
https://zandronum.com/tracker/file_download.php?file_id=816&type=bug
slope_jitter_02.wad (97,506) 2012-10-15 22:22
https://zandronum.com/tracker/file_download.php?file_id=819&type=bug
slope_jitter_01b.wad (13,724) 2012-10-21 01:40
https://zandronum.com/tracker/file_download.php?file_id=825&type=bug
2012.10.21_19.41.31_player_bridge_desync_test_04.cld (24,507) 2012-10-21 17:44
https://zandronum.com/tracker/file_download.php?file_id=826&type=bug
2012.10.25_03.20.23_doom2.cld (25,312) 2012-10-25 01:25
https://zandronum.com/tracker/file_download.php?file_id=838&type=bug
slope_jitter_03.wad (23,639) 2015-06-07 01:25
https://zandronum.com/tracker/file_download.php?file_id=1524&type=bug
jitter_01.cld (33,226) 2015-06-07 16:52
https://zandronum.com/tracker/file_download.php?file_id=1528&type=bug
jitter_02.cld (27,761) 2015-06-07 16:56
https://zandronum.com/tracker/file_download.php?file_id=1529&type=bug
jitter_01b.cld (16,165) 2015-06-07 17:24
https://zandronum.com/tracker/file_download.php?file_id=1530&type=bug
jitter_02b.cld (20,511) 2015-06-07 17:24
https://zandronum.com/tracker/file_download.php?file_id=1531&type=bug |
|
| Issue History |
| Date Modified | Username | Field | Change |
| 2012-10-15 15:16 | unknownna | New Issue | |
| 2012-10-15 15:16 | unknownna | File Added: slope_jitter_01.wad | |
| 2012-10-15 15:16 | unknownna | File Added: 2012.10.15_17.12.25_slope_jitter_01.cld | |
| 2012-10-15 15:16 | unknownna | Status | new => confirmed |
| 2012-10-15 15:34 | unknownna | Severity | minor => major |
| 2012-10-15 20:51 | Torr Samaho | Note Added: 0005127 | |
| 2012-10-15 22:22 | unknownna | File Added: slope_jitter_02.wad | |
| 2012-10-15 22:23 | unknownna | Note Added: 0005129 | |
| 2012-10-16 00:37 | unknownna | Note Edited: 0005129 | bug_revision_view_page.php?bugnote_id=5129#r2797 |
| 2012-10-16 03:41 | unknownna | Note Edited: 0005129 | bug_revision_view_page.php?bugnote_id=5129#r2798 |
| 2012-10-16 03:43 | unknownna | Note Edited: 0005129 | bug_revision_view_page.php?bugnote_id=5129#r2799 |
| 2012-10-20 19:25 | Torr Samaho | Note Added: 0005142 | |
| 2012-10-20 19:41 | Torr Samaho | Note Edited: 0005142 | bug_revision_view_page.php?bugnote_id=5142#r2807 |
| 2012-10-21 01:39 | unknownna | Note Added: 0005148 | |
| 2012-10-21 01:40 | unknownna | File Added: slope_jitter_01b.wad | |
| 2012-10-21 02:04 | unknownna | Note Edited: 0005148 | bug_revision_view_page.php?bugnote_id=5148#r2811 |
| 2012-10-21 17:10 | Torr Samaho | Note Added: 0005152 | |
| 2012-10-21 17:10 | Torr Samaho | Note Edited: 0005152 | bug_revision_view_page.php?bugnote_id=5152#r2816 |
| 2012-10-21 17:11 | Torr Samaho | Note Revision Dropped: 5152: 0002815 | |
| 2012-10-21 17:44 | unknownna | File Added: 2012.10.21_19.41.31_player_bridge_desync_test_04.cld | |
| 2012-10-21 17:44 | unknownna | Note Added: 0005156 | |
| 2012-10-21 18:00 | unknownna | Note Edited: 0005156 | bug_revision_view_page.php?bugnote_id=5156#r2818 |
| 2012-10-21 18:29 | Torr Samaho | Note Added: 0005160 | |
| 2012-10-21 18:59 | unknownna | Note Added: 0005162 | |
| 2012-10-21 19:57 | unknownna | Note Added: 0005167 | |
| 2012-10-25 01:24 | unknownna | Note Added: 0005196 | |
| 2012-10-25 01:25 | unknownna | File Added: 2012.10.25_03.20.23_doom2.cld | |
| 2012-10-25 05:51 | unknownna | Note Edited: 0005196 | bug_revision_view_page.php?bugnote_id=5196#r2841 |
| 2015-06-07 01:25 | unknownna | Note Added: 0012575 | |
| 2015-06-07 01:25 | unknownna | File Added: slope_jitter_03.wad | |
| 2015-06-07 01:26 | unknownna | Status | confirmed => feedback |
| 2015-06-07 01:26 | unknownna | Note Edited: 0005196 | bug_revision_view_page.php?bugnote_id=5196#r7290 |
| 2015-06-07 01:37 | unknownna | Note Edited: 0012575 | bug_revision_view_page.php?bugnote_id=12575#r7292 |
| 2015-06-07 16:36 | Edward-san | Note Added: 0012581 | |
| 2015-06-07 16:36 | Edward-san | Note Edited: 0012581 | bug_revision_view_page.php?bugnote_id=12581#r7300 |
| 2015-06-07 16:52 | unknownna | Note Added: 0012582 | |
| 2015-06-07 16:52 | unknownna | Status | feedback => new |
| 2015-06-07 16:52 | unknownna | File Added: jitter_01.cld | |
| 2015-06-07 16:55 | unknownna | Note Edited: 0012582 | bug_revision_view_page.php?bugnote_id=12582#r7302 |
| 2015-06-07 16:56 | unknownna | File Added: jitter_02.cld | |
| 2015-06-07 17:11 | Edward-san | Note Added: 0012583 | |
| 2015-06-07 17:11 | Edward-san | Status | new => feedback |
| 2015-06-07 17:24 | unknownna | Note Added: 0012584 | |
| 2015-06-07 17:24 | unknownna | Status | feedback => new |
| 2015-06-07 17:24 | unknownna | File Added: jitter_01b.cld | |
| 2015-06-07 17:24 | unknownna | File Added: jitter_02b.cld | |
| 2018-08-23 05:09 | unknownna | Relationship added | related to 0002294 |
|
Notes |
|
|
|
|
Is the behavior in 1.0 and 98d identical if 1.0 is used with cl_ticsperupdate 3? |
|
|
|
(0005129)
|
|
unknownna
|
2012-10-15 22:23
(edited on: 2012-10-16 03:43) |
|
Quote from Torr Samaho
Is the behavior in 1.0 and 98d identical if 1.0 is used with cl_ticsperupdate 3?
When compared side by side, both with an emulated ping of 302, they seem to be nearly identical to one another, but I'm not too sure.
I also noticed while testing IGPack that bridge things seem to be affected by this issue as well. If the floor/slope beneath them has a negative height, the client will start to jitter when jumping on the bridge things. I created an example WAD. Only the leftmost platform with a negative floor height will cause the client to mispredict its movement.
Edit:
It seems that the client will mispredict its movement on the rightmost platform as well when jumping on the bridge things.
|
|
|
|
(0005142)
|
|
Torr Samaho
|
2012-10-20 19:25
(edited on: 2012-10-20 19:41) |
|
I've got the impression that the jumping on the bridge things in your example wad got worse with the recent changes for rocket jumping on bridge things. Can you confirm this?
Do the other effects only appear if slopes are involved and the floor heights are negative?
EDIT: The new jumping problems where possibly caused by another change that was not in the last binary I sent you.
|
|
|
|
(0005148)
|
|
unknownna
|
2012-10-21 01:39
(edited on: 2012-10-21 02:04) |
|
Quote from Torr Samaho
I've got the impression that the jumping on the bridge things in your example wad got worse with the recent changes for rocket jumping on bridge things. Can you confirm this?
I can't confirm that it got worse, but I can confirm that the client mispredicts its movement in 1.0.
Quote from Torr Samaho
Do the other effects only appear if slopes are involved and the floor heights are negative?
It also jitters on slopes when the heights are positive, but it's a lot worse if they're negative. In slope_jitter_01b.wad, the heights are positive and it doesn't jitter nearly as much as it does in slope_jitter_01.wad when compared side by side.
Quote from Torr Samaho
The new jumping problems where possibly caused by another change that was not in the last binary I sent you.
I noticed in this binary that the client now jitters when moving from real floors to bridge things.
|
|
|
|
|
Quote from unknownna
I noticed in this binary that the client now jitters when moving from real floors to bridge things.
That's bad, can you make a demo of this? As predicted we seem to have come to a point where any changes to the prediction break things that used to work. I may have to revert the rocket jump on bridge things changes then.
|
|
|
|
(0005156)
|
|
unknownna
|
2012-10-21 17:44
(edited on: 2012-10-21 18:00) |
|
Quote from Torr Samaho
That's bad, can you make a demo of this?
I recorded a demo with this binary.
zandronum.exe -file player_bridge_desync_test_04.wad -playdemo 2012.10.21_19.41.31_player_bridge_desync_test_04.cld
player_bridge_desync_test_04.wad
Quote from Torr Samaho
As predicted we seem to have come to a point where any changes to the prediction break things that used to work.
I think the new fixes brought fundamentally broken bridge behavior to the surface more than anything.
Quote from Torr Samaho
I may have to revert the rocket jump on bridge things changes then.
I don't like this attitude, but it's your call.
|
|
|
|
|
Quote from unknownna
I recorded a demo with this binary.
Is this any better?
Quote from unknownna
I don't like this attitude, but it's your call.
I spent many hours during the last weeks on the prediction stuff and if I see that with every fixed issue a new issue pops up, I'm questioning myself if all the time was well spent. If the "effort / impact" ratio is too bad, it's not worth to do something as long as there are other things to do. I'm sure that the prediction issues can be fixed, but I have no idea how much work it'll take and I also don't know what the tipping point is. |
|
|
|
|
Quote from Torr Samaho
Is this any better?
Yes, that took care of it.
Quote from Torr Samaho
If the "effort / impact" ratio is too bad, it's not worth to do something as long as there are other things to do.
Considering that these issues were never dealt with until now, I consider the ratio to be very good. So far we fixed all the known side effects but one. |
|
|
|
|
Quote from Torr Samaho
I've got the impression that the jumping on the bridge things in your example wad got worse with the recent changes for rocket jumping on bridge things. Can you confirm this?
In this binary I can confirm that it got a bit worse when moving/jumping on the bridge things above the slopes in slope_jitter_02.wad. But I still feel that we only see the symptoms of fundamental issues since they were there before as well. |
|
|
|
(0005196)
|
|
unknownna
|
2012-10-25 01:24
(edited on: 2015-06-07 01:26) |
|
Quote from Torr Samaho
Do the other effects only appear if slopes are involved and the floor heights are negative?
It seems that they appear on regular floors as well, but it got a bit worse in the newer binaries. I recorded a small demo of the jitter. We have to take care of this issue.
zandronum -playdemo 2012.10.25_03.20.23_doom2.cld
Edit:
This is strange. For some reason I'm unable to reproduce the jitter on regular floors now.
|
|
|
|
(0012575)
|
|
unknownna
|
2015-06-07 01:25
(edited on: 2015-06-07 01:37) |
|
Edward-san, do you have any idea why this behavior is present? It's weird that the jitter is affected by the floor height.
What's also weird is that moving and jumping on bridge things above slopes is affected by the issue, as I noticed in IGPack (and demonstrated in slope_jitter_02.wad and now in slope_jitter_03.wad).
|
|
|
|
|
Quote from unknownna
Edward-san, do you have any idea why this behavior is present? It's weird that the jitter is affected by the floor height.
Sorry, can you make a demo with zan 2.0? I don't see any jittery going on in slope_jitter_01 and slope_jitter_01b, even with emulated ping of 302..
|
|
|
|
(0012582)
|
|
unknownna
|
2015-06-07 16:52
(edited on: 2015-06-07 16:55) |
|
Sure, check it out. It apparently starts to jitter when moving from slopes to floors and vice versa.
zandronum -file slope_jitter_01.wad -playdemo jitter_01.cld
Edit:
And here's a demo of the bridge thing issue
zandronum -file slope_jitter_03.wad -playdemo jitter_02.cld
|
|
|
|
|
|
|
|
|
Sure, here you go:
zandronum -file slope_jitter_01.wad -playdemo jitter_01b.cld
zandronum -file slope_jitter_03.wad -playdemo jitter_02b.cld |
|