[Mod] Convert table schematic to .mts [0.2.0] [saveschems]

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paramat
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[Mod] Convert table schematic to .mts [0.2.0] [saveschems]

by paramat » Wed Apr 29, 2015 19:34

For Minetest 0.4.13 and later
Depends default
Licenses: Code WTFPL. Schematics CC BY-SA

***** Note *****
This repo of mine is out of date and unmaintained, there is a much improved version at minetest-mods:
https://github.com/minetest-mods/saveschems

***** Note *****
The mod at the minetest-mods organisation has been superseded by my new mod https://github.com/paramat/mtgschems. This is also currently the official up-to-date storage location for all lua table schematics used in MTG. It also has a new conversion function that allows each schematic slice to be formatted upright instead of upside-down.
***** End note *****

Example of how to use the recently added 'minetest.serialize_schematic' function to convert a lua-table defined schematic to a .mts file saved in a mod folder.
Create your schematic in lua table form, edit the names used in the code below the table, then just run the mod in any world, when the mod loads at game startup the .mts files are written to the schematics folder.

If using globally force-placed schematics you will often need to make sure air nodes are not force-placed, otherwise they will eat chunks out of the terrain, do this by using "air" with prob1 = 0 (probability zero).

This uses the recently added 'per-node force-place' feature of Minetest schematic format v4. This is used for tree trunk nodes so they replace the leaves of any other close trees they pass through, without the tree's leaves also being force-placed and replacing trunk nodes of any other close trees. Until now close-packed trees would inevitably have chopped trunks.

The lua tables have been simplified by removing any optional parameters that have these default values:
param2 = 0 (normal rotation).
force_place = false.

The format of the lua tables is:
Vertical slices of the structure in order of increasing z (here labelled -2, -1, 0, 1, 2), composed of ..
Horizontal lines of nodes in order of increasing y, composed of ..
Nodes in order of increasing x.
Last edited by paramat on Sun Jul 15, 2018 23:30, edited 13 times in total.
 

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Re: [Mod] Convert table schematic to .mts [0.1.1] [saveschem

by TenPlus1 » Thu Apr 30, 2015 09:09

Thanks Paramat, this'll save me 17kb for a banana tree... lol
 

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Re: [Mod] Convert table schematic to .mts [0.1.2] [saveschem

by paramat » Tue May 05, 2015 23:39

Updated.
When using force-placed schematics you will often need to make sure air nodes are not force-placed, otherwise they will eat chunks out of the terrain, do this by using "air" with param1 = 0 (probability zero).
Previously in 0.1.1 i was using "ignore" nodes to do this but this is no longer possible.

Centre slice of appletree as an example:
Code: Select all
         -- 0

         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},
         {name="default:tree", param1=255, param2=0},
         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},

         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},
         {name="default:tree", param1=255, param2=0},
         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},

         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},
         {name="default:tree", param1=255, param2=0},
         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},

         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},
         {name="default:tree", param1=255, param2=0},
         {name="air", param1=0, param2=0},
         {name="air", param1=0, param2=0},

         {name="default:leaves", param1=255, param2=0},
         {name="default:tree", param1=191, param2=16},
         {name="default:tree", param1=255, param2=0},
         {name="default:tree", param1=191, param2=12},
         {name="default:leaves", param1=255, param2=0},

         {name="default:leaves", param1=223, param2=0},
         {name="default:leaves", param1=255, param2=0},
         {name="default:tree", param1=191, param2=0},
         {name="default:leaves", param1=255, param2=0},
         {name="default:leaves", param1=223, param2=0},

         {name="air", param1=0, param2=0},
         {name="default:leaves", param1=223, param2=0},
         {name="default:leaves", param1=255, param2=0},
         {name="default:leaves", param1=223, param2=0},
         {name="air", param1=0, param2=0},
 

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Re: [Mod] Convert table schematic to .mts [0.1.3] [saveschem

by paramat » Mon May 18, 2015 04:20

Version 0.1.3 uses the recently added 'per-node force-place' feature of Minetest schematic format v4. This is used for tree trunk nodes so they replace the leaves of any other close trees they pass through, without the tree's leaves also being force-placed and replacing trunk nodes of any other close trees. Until now close-packed trees would inevitably have chopped trunks.
Note 'param1' can now be replaced by 'prob', both are supported.
The lua tables have been sinplified by removing any optional parameters that have these default values:
param2 = 0 (normal rotation).
force_place = false.

See https://github.com/minetest/minetest/blob/master/doc/lua_api.txt#L781 from line 781
and https://github.com/minetest/minetest/blob/master/doc/lua_api.txt#L2201 from line 2201
 

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Re: [Mod] Convert table schematic to .mts [0.2.0] [saveschem

by paramat » Sat Sep 05, 2015 05:19

Version 0.2.0
Updated to match the 10 schematics used in latest Minetest Game, including the second set of tree schematics that grow from saplings, these do not have force-placed trunks to preserve valuable player-placed nodes, per-node force-place is used only to replace the sapling.
 

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Re: [Mod] Convert table schematic to .mts [0.2.0] [saveschem

by Wuzzy » Sat Aug 12, 2017 15:49

Is it possible to do the reverse operation, too?

I.e. converting a MTS file back to a Lua table.
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Re: [Mod] Convert table schematic to .mts [0.2.0] [saveschem

by bell07 » Sat Aug 12, 2017 17:29

Wuzzy wrote:Is it possible to do the reverse operation, too?

I.e. converting a MTS file back to a Lua table.
Yes

The related code snipped from my schemlib mod:
Code: Select all
   -- Minetest Schematics
   if string.find(filename, '.mts',  -4) then
      local str = minetest.serialize_schematic(filename, "lua", {})
      if not str then
         dprint("error: could not open file \"" .. filename .. "\"")
         return
      end
      local schematic = loadstring(str.." return(schematic)")()
         --[[   schematic.yslice_prob = {{ypos = 0,prob = 254},..}
               schematic.size = { y = 18,x = 10, z = 18},
               schematic.data = {{param2 = 2,name = "default:tree",prob = 254},..}
            ]]

      -- analyze the file
      for i, ent in ipairs( schematic.data ) do
         if ent.name ~= "air" then
            local pos = {
                  z = math.floor((i-1)/schematic.size.y/schematic.size.x),
                  y = math.floor((i-1)/schematic.size.x) % schematic.size.y,
                  x = (i-1) % schematic.size.x
               }
            local new_node = node.new(ent)
            self:add_node(pos, new_node)
            self:adjust_building_info(pos, new_node)
         end
      end
 

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Re: [Mod] Convert table schematic to .mts [0.2.0] [saveschem

by paramat » Mon Aug 14, 2017 13:38

Yes there's an API for .mts -> lua table, but it needs some code added around it.
Code: Select all
minetest.serialize_schematic()


This repo of mine is out of date and unmaintained, there is a much improved version at minetest-mods:
https://github.com/minetest-mods/saveschems
 

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Re: [Mod] Convert table schematic to .mts [0.2.0] [saveschem

by paramat » Sun Jul 15, 2018 23:30

The mod at the minetest-mods organisation has been superseded by my new mod https://github.com/paramat/mtgschems. This is also currently the official up-to-date storage location for all lua table schematics used in MTG. It also has a new conversion function that allows each schematic slice to be formatted upright instead of upside-down.
 


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