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Beginner's Guide
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      guide
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  • Extra
    • a. Understanding JSON
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      help
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    guide
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      guide
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      help
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      help
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      guide
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      function
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Documentation
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      guide
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      guide
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      help
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      Scripts
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Items
  • General
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      guide
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      help
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      help
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JSON UI
  • General
    • Intro to JSON UI
      guide
    • Best Practices
      guide
  • Tutorials
    • Adding HUD Elements
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  • Documentation
    • JSON UI Documentation
Loot, Recipes & Trading
  • General
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  • Tutorials
    • Randomized Structure Loot
Meta
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  • Q&A
    • Blocks and Items Q&A 2024/08/30
    • Deferred Technical Preview Q&A 2024/02/23
    • GameTest Q&A 2021/08/06
    • Scripting and Editor Q&A 2023/09/22
    • World Generation Q&A 2024/11/15
NBT
  • General
    • .mcstructure
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    • Experiments in Minecraft Education
    • Extending Structure Limits
  • NBT in Depth
    • About NBT (Named Binary Tag)
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Particles
  • General
    • Intro to Particles
      guide
  • Tutorials
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Scripting
  • General
    • Intro to Scripting
    • What is Script API?
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Servers
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Visuals
  • General
    • Introduction to Entity Visuals
      guide
    • Bedrock Modeling
    • Custom Death Animations
    • Effects in Animations
    • Material Creations
    • Materials
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    • Skin Packs
  • Tutorials
    • Entity Texture Animation
    • Glowing Entity Texture
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    • Player Geometry
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    • Retexturing Spawn Eggs
  • Ideas
    • Structure Presentation
World Generation
  • General
    • Intro to World Generation
      guide
    • Biomes
      guide
    • Feature Types
    • Jigsaw Structures
  • Tutorials
    • Block Conditions for Features
    • Generating Custom Ores
    • Generating Custom Structures
    • Generating Patches
    • Heightmap Noise
  • Documentation
    • Biome Tags

Shared Constructs

Shared Constructs
  • Block Descriptors
  • Range Objects
  • Fraction Objects

JSON constructs are expressible in multiple locations in the add-ons system.

Block Descriptors ​

Block descriptors can be used to check for blocks that match the specified properties. For example, block descriptors are used in the block placement filter to determine which types of blocks a custom block can survive on.

Identifier Object Example
json
{
    "name": "wiki:my_block"
}
1
2
3
Permutation Object Example
json
{
    "name": "wiki:my_block",
    "states": {
        "wiki:my_state": 5
    }
}
1
2
3
4
5
6
Tag Object Example
json
{
    "tags": "q.any_tag('minecraft:is_axe_item_destructible', 'wiki:my_tag')"
}
1
2
3

Range Objects ​

Range objects define a spread between two numbers.

Range Object Example
json
{
    "min": 2,
    "max": 4
}
1
2
3
4

When provided, a random value will be selected inclusively between the minimum and maximum. Rolls are not retained; a new random value will be rolled each instance the range object would be used. The maximum must not be less than the minimum, but they may be equal to affix rolls to a specific value.

Fraction Objects ​

Fraction objects define a fraction using a numerator and denominator.

Fraction Object Example
json
{
    "numerator": 3,
    "denominator": 5
}
1
2
3
4

The value used in place of the object will be the computed division, numerator ÷ denominator. Both the numerator and denominator must be at least 1, and the denominator cannot be equal to the numerator.

Contributors

Edit Shared Constructs on GitHub

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