Edit signs

[misiek]

Is it possible to programaticaly (by code) change sign text?

I wonna show status of few places that are around city in city hall on signs. Is it possible with MCSever and Lua plugin?

[LO1ZB]

Have a look here: http://mc-server.xoft.cz/LuaAPI/cSignEntity.html

[xoft]

Usually you need to do something like this:

-- World is the cWorld of the sign, X, Y, Z are the sign's coords
World:DoWithBlockEntityAt(X, Y, Z,
  function (a_CBBlockEntity)
    local BlockType = a_CBBlockEntity:GetBlockType()
    if ((BlockType == E_BLOCK_WALLSIGN) or (BlockType == E_BLOCK_SIGNPOST)) then
      local Sign = tolua.cast(a_CBBlockEntity, "cSignEntity")
      Sign:SetLines("line1", "line2", "line3", "line4")
    end
  end
)

Note that I wrote this code off of my head, might not work

[misiek]

Have a look here: http://mc-server.xoft.cz/LuaAPI/cSignEntity.html

"This class is only used when generating chunks, so that the plugins may generate signs within new chunks"

I wonna edit sign in existing world, so cSignEntity itself it's not for me

Usually you need to do something like this:

-- World is the cWorld of the sign, X, Y, Z are the sign's coords
World:DoWithBlockEntityAt(X, Y, Z,
  function (a_CBBlockEntity)
    local BlockType = a_CBBlockEntity:GetBlockType()
    if ((BlockType == E_BLOCK_WALLSIGN) or (BlockType == E_BLOCK_SIGNPOST)) then
      local Sign = tolua.cast(a_CBBlockEntity, "cSignEntity")
      Sign:SetLines("line1", "line2", "line3", "line4")
    end
  end
)

Note that I wrote this code off of my head, might not work

Thank, I'll try it.

[NiLSPACE]

If you want to edit signs in an existing world you have to use cWorld:SetSignLines(a_X, a_Y, a_Z, a_Line1, a_Line2, a_Line3, a_Line4, [cPlayer])
The player parameter is optional.

[xoft]

Right, STR_Warrior got the right answer, I completely forgot about that function.

The code I gave you should work as well, but is needlessly complicated.