0003331: A_SeekerMissile( 0, 0 ) turns directly on target in specific situation.

Notes
(0018795) Filystea (reporter) 2017-11-05 17:11 edited on: 2017-11-05 17:11	Uploaded the test wad. Seems it just faces random direction duno. But it's totally a fucking bug. Seems it's a spawnitemex bug of not makign projectile turn the direction it is SHOOTED.

(0018796) Dusk (developer) 2017-11-05 18:29	Can you please elaborate how the problem manifests in the example wad? Stuff is happening but it's not obvious to me where's the problem. What happens and what do you expect to happen instead, inside the game?

(0018798) Filystea (reporter) 2017-11-05 19:14 edited on: 2017-11-05 19:18	First bug. We give some new speed to a slow by definition projectile. after using the A_SeekerMissile( 0, 2 ) in the code for the first time the speed changes from 15 in example set with A_SpawnItemEx to 2 just as set with the default actor definition. Run the test_seek_speed.pk3 map1 doom 2 Noclip and god and go to imps with shotgun ( run ultra volience ) Look what happens. A perfect example. If I set speed of a projectile with the A_SpawnItemEx should it not be the ne default defined speed of a projectile? The behavior here is undefined so I am not sure what should I expect. Tho if i use the same speed as the projectile default definition there is ofc no problem. now the second bug. The one hard to deal with. The test_seeker.pk3 again exampel is on imps. If the projectile is supposed to be a seeker I expect it to turn SLOWLY in my direction Justa s set in code. But here at the first call to this function we have a sudden change of direction. It shoudl slowly face me but instead it SUDDENLY changes direction and than finaly works as i expect. Slowly tries to face me. It's like the projectile is facing other direction than it is actualy flying to.

(0018799) Filystea (reporter) 2017-11-05 19:26 edited on: 2017-11-05 19:28	Actualy I could easily fix the second problem with a call to'https://zdoom.org/wiki/A_FaceMovementDirection [^]' A_FaceMovementDirection But it seems it is not in zandronum yet? But if there is no way to guess what is the facing vector or way to change it manualy than I guess this is bug.

(0018801) Dusk (developer) 2017-11-05 20:07	Quote If I set speed of a projectile with the A_SpawnItemEx should it not be the ne default defined speed of a projectile? The behavior here is undefined so I am not sure what should I expect. The "speed" property states the default speed of the projectile. If you use A_SpawnItemEx to spawn something, it will be tossed with the provided velocity vector instead. However, since it's a seeking projectile, it will continue to try to move using the "speed" property. This is why you are supposed to use A_CustomMissile to spawn projectiles like this. Does this resolve your issue? If not, please answer my first question as to what you expect to happen in the example wad, such as "fireball should fly at the player with approximately the speed of light but flies at 2km/h instead"

(0018802) Filystea (reporter) 2017-11-05 20:15 edited on: 2017-11-05 20:15	This answers the speed problem. Ok I am fine if this is how it is supposed to be. What about facing some unknow direction after being spawned. The projectile should face it's flying direction PATH. But it faces somemethign else. Just as i pointed out. A_FaceMovementDirection would sove this problem but well it did not work for me in the 3.0 stable. Did not work here vide not implemented.

(0020191) Filystea (reporter) 2018-11-25 15:18	BUMP

(0023265) Ru5tK1ng (updater) 2024-03-02 20:15	A_FaceMovementDirection should be in 4.0

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Issue History
Date Modified	Username	Field	Change
2017-11-05 16:35	Filystea	New Issue
2017-11-05 17:10	Filystea	File Added: test_seek.pk3
2017-11-05 17:11	Filystea	Note Added: 0018795
2017-11-05 17:11	Filystea	Note Edited: 0018795	View Revisions
2017-11-05 18:29	Dusk	Note Added: 0018796
2017-11-05 18:29	Dusk	Status	new => feedback
2017-11-05 18:29	Dusk	Priority	immediate => normal
2017-11-05 18:29	Dusk	Severity	major => minor
2017-11-05 19:09	Filystea	File Added: test_seek_speed.pk3
2017-11-05 19:14	Filystea	Note Added: 0018798
2017-11-05 19:14	Filystea	Status	feedback => new
2017-11-05 19:17	Filystea	Note Edited: 0018798	View Revisions
2017-11-05 19:18	Filystea	Note Edited: 0018798	View Revisions
2017-11-05 19:26	Filystea	Note Added: 0018799
2017-11-05 19:28	Filystea	Note Edited: 0018799	View Revisions
2017-11-05 20:07	Dusk	Note Added: 0018801
2017-11-05 20:07	Dusk	Status	new => feedback
2017-11-05 20:15	Filystea	Note Added: 0018802
2017-11-05 20:15	Filystea	Status	feedback => new
2017-11-05 20:15	Filystea	Note Edited: 0018802	View Revisions
2018-11-25 15:18	Filystea	Note Added: 0020191
2024-03-02 20:15	Ru5tK1ng	Note Added: 0023265
2024-03-02 20:15	Ru5tK1ng	Status	new => confirmed
2024-03-02 20:15	Ru5tK1ng	Resolution	open => backport later

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