Tree Simulator Recipes

The Tree Simulator uses custom tree_simulator recipes to determine what a sapling produces and how long it takes to grow.

Auto-Generation

By default, a Tree Simulator recipe is automatically generated for every registered resource sapling. You do not need to create these files unless you want to customize the outputs.

The auto-generated recipe produces:

Output	Chance	Min Rolls	Max Rolls
Log (matching tree type)	30%	1	1
Leaf Fragment	100%	1	1
Leaf Fragment (bonus)	leafDropChance × 0.5	1	4
Sapling (same type)	saplingDropChance	1	1

Generator

Pick a sapling to load the drops the mod generates for it, then change them.

Sapling (tree)

Resource typeStoneCoalIronCopperGoldLapisEmeraldDiamondObsidianAmethystNetheriteWoodQuartzPrismarineGlowstoneRedstoneDeepslateDirtFireNetherEndNatureWaterIceBeeSlimeSculkSkeletonSpiderChickenCowRabbitSquidTurtleBlazeBreezeNether StarEnder PearlShulkerDyeGunpowderGhastPigSheepFishZombieTree typeOakSpruceBirchJungleAcaciaDark OakCherryPale OakPoplar

Or type any sapling id for custom resource or tree types

Grow time (ticksToGrow) 60 s, 8.6 s with the fastest axe

Drops (drops)

CountChanceMin rollsMax rolls

30% per roll · about 0.3 per harvest

CountChanceMin rollsMax rolls

100% per roll · about 1 per harvest

CountChanceMin rollsMax rolls

12.5% per roll · about 0.31 per harvest

CountChanceMin rollsMax rolls

12.5% per roll · about 0.13 per harvest

Save asdata/resourcestrees/recipe/tree_simulator/iron_oak_sapling.json

{
  "type": "resourcestrees:tree_simulator",
  "tree": {
    "id": "resourcestrees:iron_oak_sapling",
    "count": 1
  },
  "ticksToGrow": 1200,
  "drops": [
    {
      "output": {
        "id": "minecraft:oak_log"
      },
      "chance": 0.3,
      "minRolls": 1,
      "maxRolls": 1
    },
    {
      "output": {
        "id": "resourcestrees:iron_leaf_fragment"
      },
      "chance": 1,
      "minRolls": 1,
      "maxRolls": 1
    },
    {
      "output": {
        "id": "resourcestrees:iron_leaf_fragment"
      },
      "chance": 0.125,
      "minRolls": 1,
      "maxRolls": 4
    },
    {
      "output": {
        "id": "resourcestrees:iron_oak_sapling"
      },
      "chance": 0.125,
      "minRolls": 1,
      "maxRolls": 1
    }
  ]
}

Put it in a datapack. It replaces the recipe the mod generates for this sapling. Fortune on the axe adds a roll to every drop.

Custom Recipe Format

To override the recipe for a specific sapling, place a JSON file at:

data/resourcestrees/recipe/tree_simulator/<sapling_name>.json

For example, to customize the iron_oak_sapling recipe:

data/resourcestrees/recipe/tree_simulator/iron_oak_sapling.json

JSON Format

{
  "type": "resourcestrees:tree_simulator",
  "tree": {
    "id": "resourcestrees:iron_oak_sapling",
    "count": 1
  },
  "ticksToGrow": 1200,
  "drops": [
    {
      "output": {
        "id": "minecraft:iron_ingot",
        "count": 1
      },
      "chance": 0.5,
      "minRolls": 1,
      "maxRolls": 3
    },
    {
      "output": {
        "id": "resourcestrees:iron_leaf_fragment",
        "count": 1
      },
      "chance": 1.0,
      "minRolls": 1,
      "maxRolls": 1
    }
  ]
}

Fields

Field	Description
type	Always "resourcestrees:tree_simulator"
tree	The sapling this recipe applies to (matched by item and components)
ticksToGrow	Base ticks per harvest, before the axe multiplier. Lower is faster. The generated recipe uses the resource type's treeSimulatorTicks.
drops	List of output entries (see below)

Drop Entry Fields

Field	Description
output	The item to produce (uses ItemStackTemplate format: id + optional count and components)
chance	Probability (0.0–1.0) this drop occurs per roll
minRolls	Minimum number of times to attempt this drop per harvest
maxRolls	Maximum number of times to attempt this drop per harvest

Each harvest rolls a random number of times between minRolls and maxRolls (inclusive), plus one extra roll per level of Fortune on the axe. Every roll succeeds on its own chance.

Viewing Recipes In-Game

With JEI installed, Tree Simulator recipes have their own Tree Simulator category. Look up the Tree Simulator block's uses to browse them all, or try the Sapling Explorer for the generated ones.