Sticky piston dragging players

[scr267]

When pulling blocks back to 'open a door' for example, sticky pistons seem to drag a player when it retracts, bringing the player inside a wall, or in some cases even behind it. Is that normal behaviour?

Thanks!

[Desour]

That the player is pulled is intended but he shouldn't end up in a node.

[scr267]

There are two situations where that effect is rather unintended. On my server I have a space port where I open up a 'door' where basically blocks are pulled out of the way by sticky pistons. If the player is near the blocks they get dragged into the wall. Sometimes even behind the wall and fall into the 'mesecons' wiring in the back.

Another situation is where we tried to make a "trap" that uses 8 pistons to pull the floor out from underneath a player when it is detected. The player simply gets caught in the machinery instead.

[Desour]

Before I write anything else, I should probably ask if you are really sure, that you have the newest mesecons version installed. So, have you?
(The version from contentdb might be a bit outdated.)

[scr267]

I'll get back to you on that one. It's recent but I better double check.

[Desour]

Ahhh, now I see the problem.

[Desour]

>_< mvps pulling has multiple problems.

• Here is not checked, whether the player is really in the stack or just next to it:

  mesecons/mesecons_mvps/init.lua

  Lines 252 to 253 in b0158f5

  	(obj_offset >= 0 and
  	obj_offset <= #nodestack - 0.5) then

• If the player is in front of a sticky piston, he will only be pulled if it's westwards (-X).
• Stickyblocks might be another problem.
• …

[benrob0329]

Pushing/pulling has been a little buggy for a long time (there is a reason I have to use a minecart on fast elevators)

[scr267]

Thanks both of you for the update. I might give a shot at making a small change.

[HybridDog]

The new add_player_velocity method could be used to push and pull a player.
minetest/minetest@cf64054