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114 lines
2.5 KiB
Markdown
114 lines
2.5 KiB
Markdown
---
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title: L-system tree examples
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aliases:
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- /L-system_tree_examples
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---
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# L-system tree examples
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This wiki page is a collection of example [L-system trees](/Introduction_to_L-system_trees "Introduction to L-system trees"). The intention is to help newbies better understand L-system trees, but also to provide usable tree definitions which could be used in mods.
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Giant dry shrub
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---------------
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### Profile
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Works in any game with basic map generation.
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### Definition
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```
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treedef={
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axiom = "A/A/A/A/A/A/A/A/A/A/A/A",
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rules_a = "[B+B+B+B]",
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rules_b = "[FFFFFFFFFF]",
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trunk = "mapgen_tree",
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angle = 30,
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iterations = 1,
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random_level = 0,
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trunk_type = "single",
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thin_branches = true
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}
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```
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### Screenshot
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[](/images/Giant_Dry_Shrub.webp)
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Apple tree
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----------
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### Profile
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Works in any game with basic map generation. This tree is used as the example tree in the mod “[L-System Tree Utility](https://forum.luanti.org/viewtopic.php?f=11&t=9458)”.
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### Definition
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```lua
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treedef = {
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axiom="FFFFFAFFBF",
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rules_a="[&&&FFFFF&&FFFF][&&&++++FFFFF&&FFFF][&&&----FFFFF&&FFFF]",
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rules_b="[&&&++FFFFF&&FFFF][&&&--FFFFF&&FFFF][&&&------FFFFF&&FFFF]",
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trunk="mapgen_tree",
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leaves="mapgen_leaves",
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angle=30,
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iterations=2,
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random_level=0,
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trunk_type="single",
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thin_branches=true,
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fruit_chance=10,
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fruit="mapgen_apple",
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}
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```
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### Screenshot
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[](/images/Apple_Tree.webp)
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Acacia
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------
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### Profile
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* **Game used**: Minetest Game
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* **Additional mods**: _None_
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### Definition
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```lua
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treedef={
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axiom="FFFFFFccccA",
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rules_a = "[B]//[B]//[B]//[B]",
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rules_b = "&TTTT&TT^^G&&----GGGGGG++GGG++" -- line up with the "canvas" edge
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.."fffffffGG++G++" -- first layer, drawn in a zig-zag raster pattern
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.."Gffffffff--G--"
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.."ffffffffG++G++"
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.."fffffffff--G--"
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.."fffffffff++G++"
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.."fffffffff--G--"
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.."ffffffffG++G++"
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.."Gffffffff--G--"
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.."fffffffGG"
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.."^^G&&----GGGGGGG++GGGGGG++" -- re-align to second layer canvas edge
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.."ffffGGG++G++" -- second layer
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.."GGfffff--G--"
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.."ffffffG++G++"
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.."fffffff--G--"
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.."ffffffG++G++"
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.."GGfffff--G--"
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.."ffffGGG",
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rules_c = "/",
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trunk="default:acacia_tree",
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leaves="default:acacia_leaves",
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angle=45,
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iterations=3,
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random_level=0,
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trunk_type="single",
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thin_branches=true,
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}
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```
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