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

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 item this recipe applies to (matched by item + components)
ticksToGrow	Base ticks per cycle (before axe multiplier). Lower = faster.
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

The actual rolls per harvest = random.nextInt(maxRolls - minRolls + 1) + minRolls.

Viewing Recipes In-Game

If JEI is installed, Tree Simulator recipes are visible in the Tree Simulator recipe category. Click the Tree Simulator block in JEI to browse all recipes.