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MC-3248

Getting damage reduces TNT knockback

The bug

Like how random falling damage seemed when it first debuted in 1.3, I'm not sure if this is a bug or a deliberate change to gameplay mechanics, so...

Player launchers are a popular Minecraft invention. Basically, they involve wiring a ring of TNT so it detonates around the player and propels him/her skyward. However, they only work properly in Creative or Peaceful mode. When you switch to Survival on Easy, Normal, or Hard mode, their launching power receives a seemingly arbitrary nerf. A Player Launcher charged with 32 TNT blocks can send you over 300 blocks high in Creative/Peaceful, but on any other difficulty, the height caps out at about 66 blocks for seemingly no reason.

Here's a brand new video showcasing the issue: http://youtu.be/XihAFVogAQ8

Code analysis

Code analysis by @unknown can be found in this comment.

Linked issues

Attachments

Comments 25

Tails

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.

Matthew Paul Stone

Yep! This time I recorded a video about the issue as well. Just follow the new link in the description.

Tails

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.

Matthew Sumner

Yes this is still a problem. And I have attached a world save file (TNT Cannon) from the current version (1.6.2) to prove it.

This was from my own issue report, but it describes how the players are being affected more clearly:

"When on Peaceful mode TNT has the capability of launching the player past sky limit. But on easy, normal, and hard modes TNT isn't able to do much; It can't even send players 50 blocks in one direction.
Regardless of survival and creative, this still happens in both game modes. I have attached the following a world compromised of a TNT cannon setup to prove this bug exists. I've tested TNT multiple times with this cannon and the results are the same no matter how the cannon is configured, even in survival and creative. Peaceful is more powerful than the other 3 modes."

And also I can support that no matter how much TNT, even three TNT will only launch you a short amount rather than peaceful mode.

galaxy_2alex

Is this still a concern in the current Minecraft version 1.7.4 / Launcher version 1.3.8 or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

15 more comments
Avoma

Can confirm in 20w51a.

Avoma

Can confirm in 21w03a.

Avoma

Can confirm in 21w05b.

gnamf jojo

Can confirm in 1.16.5-Optifine_HD_U_G6

FaRo1

Those are not valid on the bug tracker. If you find bugs while playing with Optifine, always verify that they also occur in Vanilla.

Matthew Paul Stone

Conem

(Unassigned)

Confirmed

Platform

Low

Player

Minecraft 1.4.4, Minecraft 1.4.7, Snapshot 13w05b, Minecraft 1.5.2, Minecraft 1.6.1, ..., 20w51a, 21w03a, 21w05b, 1.20.4, 24w05b

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