Abnormal behavior of redstone above an IC block

Question

Abnormal behavior of redstone above an IC block

LadyCailinBot opened this issue 12 years ago · 13 comments

LadyCailinBot commented 12 years ago

CRAFTBOOK-2437 - Reported by pmpmpm

Hi,

A picture will speak perfectly:

http://s7.postimage.org/u3rkssom3/2013_02_22_23_46_15.png

As you can see, the lever is down, but the redstone doesn't light up. Of course, if the level is pulled manually and not by the IC, the redstone is lit.
Same with any IC, as far as I can tell.

Thanks for reading.

LadyCailinBot · Answer 1 · 2013-02-22T23:03:46.000Z

Comment by me4502

The issue with this is, if its set up to work, the ic block will randomly change data values..

LadyCailinBot · Answer 2 · 2013-02-22T23:21:19.000Z

Comment by pmpmpm

How that?

LadyCailinBot · Answer 3 · 2013-02-22T23:44:09.000Z

Comment by me4502

Because to update a block, the ID or data has to be changed. (With bukkit)

LadyCailinBot · Answer 4 · 2013-02-24T09:41:51.000Z

Comment by me4502

Can this be tested with one of the recent versions?

LadyCailinBot · Answer 5 · 2013-03-07T23:51:34.000Z

Comment by AlexMedia

I'd like to +1 on this matter.

I have made this test setup: http://xkcd.nl/eLW/s-318025e5e40c - one vanilla MC, one with a ST Wireless Receiver, and a ST Wireless Receiver with a redstone lamp underneath it. When I flip the levers, these are the results: http://xkcd.nl/eNX/s-352a2798faf3

Apparently, adding a redstone lamp causes a block update which in turn causes the piston underneath the receiver block to extend. What's puzzling (to me, as an end user) is that this setup used to work flawlessly in the past, that is, until the server admins upgraded to a more recent server version (together with an upgrade to MC 1.4.7).

LadyCailinBot · Answer 6 · 2013-03-08T06:11:04.000Z

Comment by pmpmpm

Since the IC does not change any data around, and does not make an update on blocks, it seems logical.

Err, what would be the wrong thing if the IC would cause the blocks around to update or what? Sorry, I'm no modder, I don't know the internal system of Bukkit...

LadyCailinBot · Answer 7 · 2013-03-08T07:01:46.000Z

Comment by me4502

The issue is, bukkit has no way of updating a block without modifying its type/data.

LadyCailinBot · Answer 8 · 2013-03-08T11:49:23.000Z

Comment by AlexMedia

But it used to work in the past... Has CraftBook changed? Has Bukkit changed?

LadyCailinBot · Answer 9 · 2013-03-08T12:09:34.000Z

Comment by me4502

Craftbook used to randomly change the data of the block the IC sign is on, which caused a block update. But it also caused issues for wool, stone bricks, half slabs, stairs, sandstone, etc.

LadyCailinBot · Answer 10 · 2013-03-08T12:34:54.000Z

Comment by AlexMedia

Aha, I did not know that. I can understand that that is an undesirable side effect.

LadyCailinBot · Answer 11 · 2013-03-08T23:45:04.000Z

Comment by me4502

Actually, it turns out bukkit did change. Stopping it from pulsing data didn't break it.

LadyCailinBot · Answer 12 · 2013-03-23T11:31:04.000Z

Comment by me4502

Possibly made a workaround for this.

LadyCailinBot · Answer 13 · 2013-03-28T10:09:57.000Z

Comment by me4502

As an update, a PR to fix the bug has been submitted to bukkit by a person.

Bukkit/CraftBukkit#1100

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