[MC-44381] Slime block doesn't bounce on the edge and player/mob takes fall damage

If you jump to edge of the slime block, you will not bounce off it, and take fall damage. Seems like player has to have 50% of itself on the block to be able to bounce.

Linked issues

duplicates 1

MC-1133 Whether or not a player experiences some effect is calculated based on the block under the center of the player Resolved

is duplicated by 22

MC-44495 Slimeblock doesn't bounce on edge Resolved

MC-44497 Edge slimeblock is NOT bouncy at all! Resolved

MC-44586 Landing on Corner of Slime Block causes fall Damage Resolved

MC-44638 Slime Block Edge Resolved

MC-44850 Slime Blocks : hitting the ground to hard on the borders of the block Resolved

17 more links

Attachments

Comments 19

galaxy_2alex 2014-01-09T17:11:29Z

Okay, just investigated a bit: The bounce effect only works if 50% or more of your player is directly on the block.
Might be intended.

Green snake 2014-01-09T18:06:10Z

Okay, thanks for the information!

LastLifeLost 2014-02-21T18:37:46Z

If the 50% rule is true, it isn't entirely intuitive. It makes sense if there's another block directly beside the slime block, but not when there is an air block/open space, as just happened when I discovered this issue.

kumasasa 2014-02-24T18:31:48Z

Took fall damage while falling on an "air" block, see screenshot.

Green snake 2014-03-03T00:59:51Z

I've looked into it, and it seems that Minecraft looks for the block you are closest to (I think in the coordinates in the location of the block), and uses it as base to see if you are on a slime block, and not if you are colliding with one. Same can be seen with falling particles. If you fall next to lava, just enough not to fall into it, you will see lava particles, not particles of the block you are on top of.

9 more comments

Itouch2 2014-03-08T17:29:20Z

Still in 10c

Itouch2 2014-04-29T18:46:13Z

Confirmed for 14w17a

Itouch2 2014-05-08T15:10:37Z

Confirmed for 14w19a.

core blaster 2014-05-21T23:11:30Z

This is intentional.

Resource(s):
Sethbling
Minecraft chang log

Dlawso the Really Lucky Rabbit 2014-05-21T23:23:33Z

Sethbling: NOT official resource!

Darren Shaw 2014-08-22T20:57:41Z

"Intentional" or not, this needs to be addressed. This is a problem for mapmaking and defies the basic logic of the slime block bounce. This also happens if slime blocks are a mound and not a flat surface. You can fall 100% above slime blocks, but if there is one higher than the others and you are not perfectly centered then DEATH. This is severely impacting using slime blocks in mapmaking.

Torabi 2014-08-25T14:19:37Z

@unknown did assign himself to the ticket, and didn't mark it "Works As Intended", so it very likely isn't. The problem is that one part of the code (which block affects the player) only seems to consider a single point, but another part (bounding boxes) considers an area. While that may have been intentional before, the consequences of that behavior intersected with Slime blocks probably isn't. Fixing it probably won't be a trivial change, however. Would you like it if landing mostly on a block next to lava also counted you as landing on the lava?

KingSupernova 2015-02-02T14:03:37Z

This is actually a duplicate of MC-1133, they are both the same underlying problem.

Dlawso the Really Lucky Rabbit 2015-02-02T15:39:16Z

Not a dupe on grounds that this doesn't talk about the footsteps being completely silent.

KingSupernova 2015-02-03T01:31:34Z

Yes it is. Both this and MC-1133 are symptoms of the same issue- entities only check for the block directly beneath them, not the one they are actually standing on.

Darren Shaw 2015-02-03T01:37:50Z

MC-1133 is NOT the same issue. It specifically refers to being completely at the edge, before that point the issue does not occur. These irrelevant comments are diluting the issue.

KingSupernova 2015-02-03T01:59:23Z

And so does this one. Try actually reading the issue.

kumasasa 2015-02-04T06:31:39Z

@unknown is right. When the center of the player / entity is over the corner of the block, the block below the center of the player is checked.

kumasasa 2015-12-17T22:38:30Z

@unknown: You can stop updating this ticket, since it was resolved as duplicate of MC-1133 quite a long time ago.