[MC-110648] Lingering potions not creating area effect cloud on the ground

The bug

Lingering potions thrown on the ground can produce area effect clouds at varying heights. This behavior occurs from all kinds of throwing angles, distances, and speeds. This bug could be sufficiently fixed by fixing MC-88368.

Short entities like axolotls and turtles can sometimes avoid lingering clouds just because the cloud spawns so high, even though the potion landed on the ground. Example: MC-210987

How to reproduce

Press F3+B and throw several lingering potions on the ground. You can clearly see that some hitboxes are higher than others, often floating nearly half a block off the ground.

Related issues

is duplicated by

MC-210987 Axolotl does not get damage of lingering harming potion

relates to

MC-88368 Lingering potion clouds unaffected by gravity

Attachments

MC-110648.mp4

Comments

migrated 2016-11-24T01:16:06Z

[media][media][media][media]

tryashtar 2016-11-24T01:18:18Z

Here you can see the bottom of the area effect cloud hitbox in comparison to a block. It is floating about 1/3 of a block off the ground. The potion was thrown directly downward onto solid ground. Other potions thrown in that way were placed at different heights.

migrated 2016-11-24T19:54:47Z

I am able to reproduce, it probably depends on the angle you throw at. This bug has probably existed since 1.9, when lingering potions and area effect clouds were added.

migrated 2018-02-19T18:04:16Z

The issue is linked to how the game extrapolates the path of a moving object. If the next update to the position of the potion makes it collide with a block at any time along its path, then the potion will break and spawn in the area effect cloud. The problem is that it uses the current position of the potion, not the extrapolated collision point, as the position to spawn the area effect cloud. Simply changing which position gets used should fix the issue, assuming that my theory is correct.

Evtema3 2020-10-17T01:52:17Z

Confirmed as of 1.16.3.

Avoma 2021-01-21T11:48:58Z

Can confirm in 21w03a.

Avoma 2021-02-04T14:57:01Z

Can confirm in 21w05a.

Avoma 2021-02-12T09:28:51Z

Can confirm in 21w06a.

Avoma 2021-02-18T14:41:36Z

Can confirm in 21w07a. As stated in this report, this doesn't always happen so you may need to throw several potions down in order to reproduce this issue.

Avoma 2021-03-05T11:04:55Z

Can confirm in 1.16.5 and 21w08b.

Avoma 2021-03-07T14:16:45Z

Video attached.

Avoma 2021-03-21T13:26:45Z

Can confirm in 21w11a.

Avoma 2021-05-03T11:20:57Z

Can confirm in 21w17a.

Avoma 2021-08-23T11:31:51Z

Can confirm in 1.17.1.

Avoma 2022-03-05T11:26:51Z

Can confirm in 1.18.2.

Avoma 2022-06-21T13:50:41Z

Can confirm in 1.19 and 22w24a.

Avoma 2022-08-19T12:22:38Z

Can confirm in 1.19.2.

himazinn_Japan 2024-12-10T10:24:37Z

Can't reproduce on 1.21.4. This was fixed in 24w36a when MC-207101 was fixed. Currently clouds spawn at the height of any block or entity they collide with.

himazinn_Japan 2024-12-12T11:26:52Z

I have attached the behavior in 1.21.4.Youtube