How can I make new trees?

[burli]

I want to create a more bush like tree from default wood an leaves including saplings. How can I do this? Can I use some of the code from trees.lua or do I have to write my own code?

[lisacvuk]

Of course you can use the default game stuff, as long as you respect the licence. You should probably start with reading Rubenwardy's modding book :D

[burli]

I don't mean copy and paste the code. I know that I can do that. I mean calling the existing code

[lisacvuk]

http://dev.minetest.net/minetest.place_schematic
Create some schematics, save them, and give a random chance to place each of them.

[burli]

Never worked with schematics. How can I create them?

[lisacvuk]

I think you can use the worldedit mod. There's a manual for it :D

[burli]

Ok, but with a schematic I just get one tree. I want more random leaves. And worldedit seems to save the schematic in a different format

[KCoombes]

are you using //mtschemcreate (tree name)? you could save several, slightly different trees (tree_1, tree_2, etc) and randomize the decoration placement in mapgen.

[burli]

found this. It's working now.

viewtopic.php?f=12&t=9400

Will they be randomly selected if I use _# like other media files or do I have to generate the filename myself?

What I don't like is that I can only use the corner to place schematics, not the center.

[KCoombes]

found this. It's working now.

viewtopic.php?f=12&t=9400

Will they be randomly selected if I use _# like other media files or do I have to generate the filename myself?

What I don't like is that I can only use the corner to place schematics, not the center.

you would need to create the filename yourself for each tree schematic you save, but the random generation is handled by code in the mapgen file

[burli]

you would need to create the filename yourself for each tree schematic you save, but the random generation is handled by code in the mapgen file

I know that I have to enter the filename myself. I just want to know if multiple files with _# ending will be loaded randomly like with textures or sound files or if I have to code this myself

For example: I have the files tree_1.mts, tree_2.mts, tree_3.mts

can I use the code

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

minetest.place_schematic(pos, "tree.mts", rotation, replacements, force_placement)

and one of the three files is selected randomly?

[twoelk]

Somebody else once asked "How to make Trees?"
Sokomine started a trees_lib
Vanessa's plants/biome library plants the stuff for More-Trees and others.
Duane's Schematic Saver might be useful

[KCoombes]

you would need to create the filename yourself for each tree schematic you save, but the random generation is handled by code in the mapgen file

I know that I have to enter the filename myself. I just want to know if multiple files with _# ending will be loaded randomly like with textures or sound files or if I have to code this myself

For example: I have the files tree_1.mts, tree_2.mts, tree_3.mts

can I use the code

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

minetest.place_schematic(pos, "tree.mts", rotation, replacements, force_placement)

and one of the three files is selected randomly?

Try this:
Adapted from Ethereal NG - WTFPL

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

local add_schem = function(a, b, c, d, e, f, g, h, i)

   minetest.register_decoration({
      deco_type = "schematic",
      place_on = a,
      sidelen = 80,
      fill_ratio = b,
      biomes = c,
      y_min = d,
      y_max = e,
      schematic = f,
      flags = "place_center_x, place_center_z",
      spawn_by = h,
      num_spawn_by = i,
   })
end

local path = minetest.get_modpath("modname") .. "/schematics/"

-- Basic Tree
add_schem({"a"}, 0.02, {"b"}, 3, 80, path .. "tree_1.mts", nil, nil, nil)
add_schem({"a"}, 0.02, {"b"}, 3, 120, path .. "tree_2.mts", nil, nil, nil)

[Sokomine]

Saving schematics for trees can also quite easily be done with my handle_schematics mod.

[burli]

Try this:
Adapted from Ethereal NG - WTFPL

Thx, I will try this

[paramat]

Saving schematics with Worldedit has problems, you cannot set per-node probability for "air" or per-node force-place.
For full control and often faster working create schematic files using tables in this way https://github.com/minetest-mods/saveschems

[burli]

Sokomine started a trees_lib
Vanessa's plants/biome library plants the stuff for More-Trees and others.

They both use L-Trees, which is buggy as far as I know. moretrees causes ugly shadows. Don't know how it is with trees_lib

Saving schematics with Worldedit has problems, you cannot set per-node probability for "air" or per-node force-place.
For full control and often faster working create schematic files using tables in this way https://github.com/minetest-mods/saveschems

Thx, will take a look

[Wuzzy]

Using schematics for tress has the huge drawback that they always look the same. Also, I heard that schematics were originally intended for small decorations and not full trees and entire buildings and such.

You may want to look into L-system trees, look here:
http://dev.minetest.net/Introduction_to_L-system_trees

L-system trees have the benefit that they can be more random. L-systems are really powerful tools IMO.

I even wrote a mod for helping people creating new L-system trees (to save your time and sanity):
viewtopic.php?f=11&t=9458

[burli]

Using schematics for tress has the huge drawback that they always look the same.

This sounds like there as some randomization

Not exactly true, although most schematics are used that way and most of us don't care about the random factors that can be applied. Hmmm was a bit upset when learning that his schematics where used for storing houses and the like instead of the decorations he intended the file format and decorations mechanism to be used for :-)

Also, I heard that schematics were originally intended for small decorations and not full trees and entire buildings and such.

But as far as I can see the default mapgens use schematics for trees. And they don't look equal

You may want to look into L-system trees, look here:
http://dev.minetest.net/Introduction_to_L-system_trees

L-system trees have the benefit that they can be more random. L-systems are really powerful tools IMO.

I even wrote a mod for helping people creating new L-system trees (to save your time and sanity):
viewtopic.php?f=11&t=9458

I thought L-System is buggy and causes the ugly shadows in moretrees

[Wuzzy]

Has “L-system trees are buggy” been proven yet? Like, is there an issue on that or something?

OK, schematics are not completely static, some randomization is indeed possible. I checked it in documentation.

Let's just say L-system trees and schematics are both possible ways to make random trees.

[burli]

I have this with l-system from this thread
viewtopic.php?f=6&t=14194

Can you post a link to schematics doc plz? Didn't found one yet

[Sokomine]

They both use L-Trees, which is buggy as far as I know. moretrees causes ugly shadows. Don't know how it is with trees_lib

trees_lib just offers all known methods of placing trees - be it an algorithm, L-System or schematics (either file or table) The lib can optionally register all the necessary nodes and grow trees from saplings on suitable grounds. It is possible to provide several growing methods per tree type.

Using schematics for tress has the huge drawback that they always look the same. Also, I heard that schematics were originally intended for small decorations and not full trees and entire buildings and such.

You can use more than one schematic, make each schematic have a variable height and rotate them automaticly. That's usually more than enough. In addition, trees placed by mapgen often overlap. And if I'm not mistaken, decorative trees where definitely something hmmm wrote the decorations for. He just got a bit annoyed when I started using them for houses :-)

Can you post a link to schematics doc plz? Didn't found one yet

They're sometimes called "decoration" in lua_api.txt

[azekill_DIABLO]

viewtopic.php?f=12&t=9400

omg thank you so much i'm searching this since one month

[paramat]

> I thought L-System is buggy and causes the ugly shadows in moretrees

Yes it has always created subtle shadows in water, but more recently it creates dark shadows in all non-mgv6 mapgens. Something about l-system code triggers extreme lighting bugs in core 'updateLighting', both need work.
To only get subtle shadows make sure to grow l-system trees from saplings, don't create trees at mapgen time.