[MC-2110] Projectiles shot at a Nether Portal appear behind it before disappearing to The Nether Created: 03/Nov/12  Updated: 29/May/24

Status: Reopened
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Minecraft 1.4.2, Snapshot 13w03a, Minecraft 1.7.1, Minecraft 1.7.2, Minecraft 1.7.4, Minecraft 14w05b, Minecraft 1.7.10, Minecraft 14w30c, Minecraft 14w31a, Minecraft 1.8-pre1, Minecraft 1.8.8, Minecraft 15w36d, Minecraft 15w37a, Minecraft 1.10.2, Minecraft 16w32a, Minecraft 16w32b, Minecraft 16w33a, Minecraft 16w35a, Minecraft 17w06a, Minecraft 1.12 Pre-Release 6, Minecraft 1.12.1, Minecraft 1.13.1, 20w51a, 21w05b, 21w07a, 21w42a, 1.19, 1.19.3, 23w04a, 23w05a, 23w06a, 1.21 Pre-Release 1
Fix Version/s: None

Type: Bug
Reporter: john smith Assignee: Unassigned
Resolution: Unresolved Votes: 19
Labels: None

Attachments: File MC-2110.mp4     Zip Archive The glitch pictures.zip     Zip Archive The glitch pictures.zip    
Issue Links:
Duplicate
is duplicated by MC-7762 Arrow entity doesn't go through portal. Resolved
is duplicated by MC-46867 Arrow still can get fired through Net... Resolved
is duplicated by MC-65326 Arrows will not pass through nether p... Resolved
Relates
relates to MC-96007 Arrows, trident, projectiles, splash ... Resolved
relates to MC-196556 When projectiles (such as arrows and ... Resolved
CHK:
Confirmation Status: Confirmed
Category:
Projectiles, Rendering
Mojang Priority: Low
Area: Platform

 Description   

I was just doing some redstoning, and i made a lava arrow trap and put a nether portal in front of it. when it shot, it stayed for 2 seconds then vanished. when i went through the portal the arrows then shot, and stayed there.

Note: Currently the arrow doesn't even go to the nether at all, after the delay mentioned here it gets stuck in the portal as mentioned in MC-96007.



 Comments   
Comment by Brain81505 [ 11/Feb/23 ]

Can confirm in 23w06a

Comment by Brain81505 [ 01/Feb/23 ]

Can confirm in 23w05a

Comment by Brain81505 [ 25/Jan/23 ]

Can confirm in 1.19.3 and 23w04a

Comment by [Mod] Avoma [ 06/Jul/22 ]

Can confirm in 1.19.

Comment by lovexyn0827 [ 26/Jan/22 ]

This is why it happens:

In Minecraft 1.16.1 and earlier versions, thrown projects checks if the OUTLINE shapes of blocks, to find potential collisions and chances to be teleported ("hit" a nether_portal block, for example)(See ThrowableProjectile.tick()). A portal has its non-empty OUTLINE shapes though it has no collision box which can stop regular entity movement, so thrown projectiles can always detect if it can be teleported no matter how high their velocity is.

But in 1.16.2-pre1, something was changed. The  OUTLINE shape get no longer used in collision checks, instead, the COLLIDER shape has been used since then (See ThrowableProjectile.tick() &  ProjectileUtil.getHitResult()). However, portals has empty COLLIDER shapes, so the teleporting check became dead code. And entities only stays in some seperated points, thus if the velocity of a thrown projectile entity is greater than 1 bloch per tick, it may pass through the portal if it failed to be teleported in the Entity.handleNetherPortal() method.

Suggestions to solve it:

The change may be intended to fix MC-73844, simply changing it back is not a good idea. But a addional ray trace may be introduced when the speed of the entity is higher than 1 block pre tick, just like what falling_blocks of concrete powder do.

Comment by [Mod] ampolive [ 23/Oct/21 ]

Can confirm in 21w42a.

Comment by [Mod] markderickson [ 20/Feb/21 ]

I can confirm in 21w07a.

Comment by [Mod] Avoma [ 05/Feb/21 ]

Can confirm in 21w05b.

Comment by [Mod] Avoma [ 12/Jan/21 ]

Can confirm in 20w51a.

Comment by Conem [ 08/Jun/20 ]

In 1.16 Pre-release 2, arrows and tridents go through the portal, without teleporting - as if it was air.

Comment by Kraif [ 24/Aug/18 ]

Confirmed for 1.13.1.

Comment by null (Inactive) [ 10/Aug/16 ]

It seems that in 16w32a, arrows get "stuck" on the portal as if it's a solid block. Then they disappear and get teleported.

Comment by Fabian Röling [ 26/Jun/16 ]

Note to tests in recent versions: Due to another bug, arrows don't get teleported at all. It's still possible to test this bug by standing near the portal while shooting. About 2-3 blocks distance is the limit.

Comment by Marcono1234 [ 12/Sep/15 ]

Confirmed for

  • 15w37a
Comment by Marcono1234 [ 27/Jul/14 ]

Confirmed for

  • 14w30c
  • 14w31a
  • Minecraft 1.8-pre 1
Comment by Jeuv [ 06/Nov/13 ]

Still in 1.7.2. The arrows only appear behind the portal for a split second though.

Comment by Kumasasa [ 14/Jul/13 ]

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Comment by Kumasasa [ 07/Dec/12 ]

Cameron, if you don't want to publicly show your email adress , you should better edit your comments in this ticket - and when replying via email at least remove the quoted part...

Comment by john smith [ 07/Dec/12 ]

Ok thank you for notifying me.

Comment by Tails [ 07/Dec/12 ]

From my tests indeed.

Comment by john smith [ 07/Dec/12 ]

Oh lol so it just a really small graphic glitch and that's all?

Comment by Tails [ 06/Dec/12 ]

I see, but this is pure graphical. Small lag while the arrows are loaded into the nether. You neither can pick up those arrows nor do they hurt you.

Comment by john smith [ 06/Dec/12 ]

It only reproduce in the real world for about 2 seconds then vanishes.Did you see it come at you?

Comment by Tails [ 05/Dec/12 ]

Cannot reproduce, I activate 2 dispensers at the same time, which shoot 2 arrows at the same time and go into the portal at the same time and if I follow I get 2 arrows on the other side.

Comment by john smith [ 05/Dec/12 ]

Yeah, it only duplicates through the portal from a dispenser.

Comment by john smith [ 05/Dec/12 ]

Yeah, it only duplicates through the portal from a dispenser.

Comment by Tails [ 04/Dec/12 ]

So how exactly do arrows duplicate? Shot arrows go through portals - intended feature.

Comment by john smith [ 28/Nov/12 ]

Yes, the glitch is still in 1.4.5 if you want me to put up the file of the world i can do so.

Comment by Tails [ 28/Nov/12 ]

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Comment by john smith [ 17/Nov/12 ]

Here are some of the pictures

Comment by john smith [ 12/Nov/12 ]

I made a file because i tried putting up the screenshots but that did not seem to work.

Comment by Mortvert (Mort Imert) [ 12/Nov/12 ]

Can you please attach some screenshots of that setup? And add more details to the description.

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