[MC-1677] Retracting piston shows ghost hitbox of technical block

The hitbox of a retracting piston is postitioned incorrectly. See attached screenshot.

Just look at the piston while it is retracting and aim at the back part so the hitbox is visible.

Ideally you connect it to a redstone clock or something similar so you don't have to flip levers.

Linked issues

is duplicated by 7

MC-15303 Ghost block hind piston when retracting Resolved

MC-15678 strange wire frames when using fast pistons Resolved

MC-23305 MAJOR PISTON GLITCH Resolved

MC-27200 its a small piston glitch Resolved

MC-29872 Added hit box??? Resolved

2 more links

Attachments

Comments 24

Tom Lee 2012-11-07T17:37:06Z

How do you reproduce it?

Jonathan Haas 2012-11-07T17:53:30Z

Just by looking at the piston while it is retracting and aiming at the back part so the hitbox is visible.

Ideally you connect it to a redstone clock or something similar so you don't have to flip levers or something.

Apart from the visually incorrect hitbox, I assume some bugs like falling through pistons while they are retracting are caused by this.

Tom Lee 2013-01-06T06:33:54Z

You should've added that portion to this issue's description.

kumasasa 2013-01-27T20:11:42Z

Confirmed.

Matouš Dřízhal 2013-02-22T18:37:01Z

May I ask, what's the official name of "hitbox"?

14 more comments

Matouš Dřízhal 2013-02-22T19:18:12Z

I attach my own.

kumasasa 2013-02-22T19:19:52Z

"Paul" ?

http://en.wikipedia.org/wiki/Hitbox

Jonathan Haas 2013-02-22T19:22:14Z

Official name? Hitbox is explained here: http://en.wikipedia.org/wiki/Hitbox
Basically for Minecraft it's the shape that affects collision and it's also visible if you move the mouse on a block. However for some blocks the visible hitbox is different to the collision hitbox (compare for example fences).

Matouš Dřízhal 2013-02-23T15:02:03Z

OK, thanks

Ezekiel 2014-01-22T16:01:53Z

Is this still a concern in the latest Minecraft version 14w03b? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

kbk 2014-01-23T04:22:24Z

The piston hitbox can now sometimes be seen partially in front of it, offset by the width of piston head. Piston head hitbox can appear offset likewise, and it also may appear behind the piston.

Itouch2 2014-02-09T17:14:52Z

Still affects 1.8 snapshots and 1.7.4

Itouch2 2014-02-14T14:42:59Z

Also affects 07a

Itouch2 2014-02-22T22:32:42Z

Confirmed for 08a

Itouch2 2014-03-10T16:57:00Z

Confirmed for 1.7.5 and 14w10c

dirk (switched to Minetest) 2014-05-02T19:37:51Z

Confirmed in 14w18b (plus: the connection part of the front and the piston body sticks through the piston body if you create a Redstone block and piston clock)

Itouch2 2014-05-03T12:29:32Z

I begin to think that it works as intended because when a piston retracts itself, you don't see its own hitbox, but the "piston_extension" hitbox. This technical block is necessary for the proper functioning of the piston, and I doubt that its hitbox can be removed. Here's a picture which illustrates my point.

Jonathan Haas 2014-05-04T14:21:10Z

Gary, that's possible, but I'm pretty sure there is no real need or reason to display the hitbox of an otherwise invisible technical box to the player. The engine is certainly capable of removing or changing the hitbox for certain blocks. So I still think this is b bug and should be fixed.

Itouch2 2014-05-04T14:23:28Z

You're certainly right. Maybe should you rewrite the title?

Itouch2 2014-05-08T15:16:19Z

Confirmed for 14w19a.

Itouch2 2014-05-15T16:34:49Z

Confirmed for 14w20a and b.

Itouch2 2014-05-29T10:27:17Z

Confirmed for 14w21b.

Itouch2 2014-06-21T15:37:17Z

Confirmed for 14w25b.

kumasasa 2014-07-17T19:30:22Z

Fixed in 14w29b