06944: burnforc: Part of the water line stays in place

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06944	Graphics	Minor	Always	Apr 18, 2018, 18:26	Jul 17, 2021, 18:15

Tester	ICEknight	View Status	Public	Platform	MAME (Official Binary)
Assigned To	Haze	Resolution	Fixed	OS	Windows 10 (64-bit)
Status [?]	Resolved			Driver	namco/namcos2.cpp
Version	0.196	Fixed in Version	0.234	Build	64-bit
		Fixed in Git Commit	30e547b	Github Pull Request #

Summary	06944: burnforc: Part of the water line stays in place
Description	When the water's perspective changes, part of its topmost line stays in place.
Steps To Reproduce	Start game, reach a jump point. Alternatively, just move up or down when in a "spaceship level".
Additional Information	May be related to #5261: http://mametesters.org/view.php?id=5261 Mentioned: https://github.com/mamedev/mame/issues/5331
Github Commit

Flags
Regression Version
Affected Sets / Systems	burnforc

Attached Files	0002.png (34,186 bytes) Apr 18, 2018, 18:26 Uploaded by ICEknight

No.14966 Haze Senior Tester Apr 19, 2018, 17:27	I looked at it once, and if you fix the raster timing for this you end up breaking the raster timing in some of the driving games (fourtrax IIRC) it's an off-by-one raster error anyway, much like nebulous ray has. probably off-by-one due to other things with the system timing, or the exact point at which various registers actually take effect etc. being wrong.
No.18743 Emuissues Tester Apr 25, 2021, 17:40	Hi. I've discovered a workaround for this. Just enter service mode (F2) and flip the screen. Later in mame video options, flip the screen 0 at 180º. Thank you.
No.19108 M.A.S.H. Senior Tester Jul 17, 2021, 18:15	Fixed by Haze. https://git.redump.net/mame/commit/src/mame/drivers/namcos2.cpp?id=30e547bc5ae1093d76c80ccca8e5f40ffc6cc004 Added "m_update_to_line_before_posirq = true; // prevents bad line on horizon" to init_burnforc