[MC-3905] Piston powered by block being pushed vertically Created: 27/Nov/12  Updated: 01/Jun/13  Resolved: 18/Dec/12

Status: Resolved
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Minecraft 1.4.5
Fix Version/s: None

Type: Bug
Reporter: Thoryn Haylett Assignee: Unassigned
Resolution: Duplicate Votes: 1
Labels: piston, redstone
Environment:

Windows Vista


Attachments: PNG File 2012-11-27_20.20.41.png     PNG File 2012-11-27_20.20.47.png     PNG File 2012-11-27_20.20.53.png     PNG File 2012-11-27_20.21.01.png     PNG File 2012-11-27_20.39.28.png    
Issue Links:
Duplicate
duplicates MC-108 Droppers, Dispensers and Pistons acti... Resolved
CHK:
Confirmation Status: Confirmed
Game Mode: Creative

 Description   

I did some testing and it appears that in 1.4.5. the block that a piston pushes upwards also powers the piston, so this locks it in place permanently.

What I expected to happen was...:
The piston would retract.

What actually happened was...:
It did not.

Steps to Reproduce:
1. Place a piston facing upwards (either kind)
2. place a block on the piston
3. power the piston a constant source (torch, lever)
4. place a lever on the block extended by the piston and turn it on.
5. Turn off the source directly powering the piston.



 Comments   
Comment by Tails [ 18/Dec/12 ]

Ok resolving as duplicate of MC-108, thanks for the info

Comment by Tavis [ 18/Dec/12 ]

Correct.

Comment by Tails [ 18/Dec/12 ]

So basically this is nothing special, but another type of quasiconnectivity.

Comment by Tavis [ 18/Dec/12 ]

The piston extension updates the piston base whenever it gets an update.

Comment by Tails [ 12/Dec/12 ]

In my tests activating the leaver doesn't make the piston extend till a block update is given - hence the relation.
Deactivating the leaver on the other hand retracts the piston without a block update for some reason.

Comment by [Mod] CubeTheThird [ 12/Dec/12 ]

I don't believe so, because the behaviour does not seem to be affected by block updates.

Comment by Tails [ 12/Dec/12 ]

Pretty sure related to quasiconnectivity.

Comment by Thoryn Haylett [ 27/Nov/12 ]

Same here.

Comment by [Mod] CubeTheThird [ 27/Nov/12 ]

In my trials it does not.

Comment by Anon Ymus [ 27/Nov/12 ]

When the block the piston is pushing is not touching the piston (because the piston is retracted), does powering the block cause the piston to extend?

Comment by [Mod] CubeTheThird [ 27/Nov/12 ]

Can confirm, though I am unsure if this is intended. This behaviour is not like a BUD.

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