mojira.dev
MC-753

Double T-Junction Rail problem

Problem:
Once you get the rails into a configuration as seen in the attached

[media]

You cannot change the orientation through a signal anymore.

"What I expected to happen was...":
The button press can still change the orientation

"What actually happend was...":
The signal is simply ignored

"Steps to reproduce":
1.) Arrange the rails in an S like in

[media]

Under each bent there is a button.

2.) add the missing rails like in

[media]

3.) press a buttons to see one of the rails moving like in

[media]

and

[media]


4.) press the buttons to form the figure seen in

[media]

Once this configuration is reached you can press the buttons as much as you want, the rails won't change.

This bug appears also in 1.3.2. I did not test 1.3.1. I didn't check if the single player mode is affected as well (but I would assume it is).

The problem with this bug is, that it requires some structure to be build bigger than needed, since you need to place an extra rail between the two bent ones. Also, if you accidentally get into the configuration of step5.jpg, you are stuck and need to rebuild.

Linked issues

Attachments

Comments 11

This is horrible. I have designed several different railway stations that totally depend on double T-junctions to work correctly. I never got around to building any of them, and I guess I never will, because all of them are very tightly knit and intolerant of change. I can't fix them to work around this bug, so I'll have to discard them all and redesign from scratch.

Confirmed. See screenshots.

Has this design ever worked? This is how rails are intended to work...

If that is how they are intended to work, then you can surely explain what the reason for this behaviour is. For me I see I can flip directions with a button normally. But here it stops working once a certain configuration is reached. So what is the reason for being able to switch the rails into a fixed position, that is no escaping from?

When there are two different ways a corner rail piece could connect, a redstone signal will switch between them.
In step2.jpg, both of the corner pieces can switch directions while still connecting (note that it doesn't care whether the other piece stays connected or not).
In step5.jpg, neither piece can switch direction without becoming disconnected at one end.

1 more comments

Pressing the button leads to step3/4.jpg because only the rail that receives the redstone signal is affected.
Your proposed changes would not prevent any rails from switching that could switch before, but they will make rails switch that did not switch before, possibly breaking things.

Your stations are broken, not the game, and I don't think Mojang will change a game mechanic that isn't broken in order to fix someone's minecart stations while breaking a lot of other ones.

Alex, my (and not only my) stations are broken, yes, because I expected this to work and it does not. Basically you speak against all behavioural changes. If that is the policy for minecraft, then things like the Redstone update should never happen as well.

Can confirm in 13w10b. Not sure if not intended though.

Since this got closed as "Works as intended" can somebody please explain me why this works as intended and what the intension is here?

Since no one did answer I guess the answer of what the intension is, is simply: minecraft can't be changed this way.

Jochen Theodorou

(Unassigned)

Confirmed

Minecraft 1.4.2, Minecraft 1.4.7, Snapshot 13w04a, Snapshot 13w10a, Snapshot 13w10b, ..., Snapshot 13w11a, Minecraft 1.5.1, Minecraft 1.5.2, Minecraft 1.6.1, Minecraft 1.6.2

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