Pointed dripstone feature

The pointed_dripstone feature can be used to add pointed dripstone to the world.

Configuration

The pointed_dripstone feature has the following configuration options:

Option	Type	Description
`chance_of_taller_dripstone` (optional in Json, defaults to `0.2`)	A `float` in the range \([0.0;1.0]\).	Determines the chance of a dripstone being taller than 1 block.
`chance_of_directional_spread` (optional in Json, defaults to `0.7`)	A `float` in the range \([0.0;1.0]\).	Determines the chance of a dripstone spreading horizontally.
`chance_of_spread_radius2` (optional in Json, defaults to `0.5`)	A `float` in the range \([0.0;1.0]\).	Determines the chance of a dripstone spreading 2 blocks away.
`chance_of_spread_radius3` (optional in Json, defaults to `0.5`)	A `float` in the range \([0.0;1.0]\).	Determines the chance of a dripstone spreading 3 blocks away.

In code, the PointedDripstoneConfiguration class is used to configure the feature.

Example

Minecraft uses a simple_random_selector feature to actually place pointed dripstone. Here's one of the features used to place upwards pointing dripstone.

KotlinJson

ConfiguredFeatures.kt

@OptIn(ExperimentalWorldGen::class)
@Init(stage = InitStage.POST_PACK_PRE_WORLD)
object ConfiguredFeatures : FeatureRegistry by ExampleAddon.registry {

    val POINTED_DRIPSTONE = registerConfiguredFeature(
        "pointed_dripstone",
        Feature.POINTED_DRIPSTONE,
        PointedDripstoneConfiguration(
            0.2F, // chance_of_taller_dripstone
            0.7F, // chance_of_directional_spread
            0.5F, // chance_of_spread_radius2
            0.5F  // chance_of_spread_radius3
        )
    )

}

PlacedFeatures.kt

@OptIn(ExperimentalWorldGen::class)
@Init(stage = InitStage.POST_PACK_PRE_WORLD)
object PlacedFeatures : FeatureRegistry by ExampleAddon.registry {

    val POINTED_DRIPSTONE = placedFeature("pointed_dripstone", ConfiguredFeatures.POINTED_DRIPSTONE)
        .environmentScan( // (1)!
            Direction.DOWN,
            BlockPredicate.solid(),
            BlockPredicate.ONLY_IN_AIR_OR_WATER_PREDICATE, // (2)!
            12 // max_steps
        )
        .randomVerticalOffset(1) // (3)!
        .register()

}

Searches downwards for a solid block.
Only place the dripstone if the block below is air or water. The static constant is equivalent to
```
BlockPredicate.matchesBlocks(Blocks.AIR, Blocks.WATER) 
```
Makes sure to place the dripstone on top of the solid block.

configured_feature/pointed_dripstone.json

{
  "type": "minecraft:pointed_dripstone",
  "config": {
    "chance_of_taller_dripstone": 0.2,
    "chance_of_directional_spread": 0.7,
    "chance_of_spread_radius2": 0.5,
    "chance_of_spread_radius3": 0.5
  }
}

The placed feature is also located in the random selector:

placed_feature/pointed_dripstone.json

{
  "feature": "minecraft:pointed_dripstone",
  "placement": [
    {
      "type": "minecraft:environment_scan", // (1)!
      "allowed_search_condition": {
        "type": "minecraft:matching_blocks",
        "blocks": [
          "minecraft:air",
          "minecraft:water"
        ]
      },
      "direction_of_search": "down",
      "max_steps": 12,
      "target_condition": {
        "type": "minecraft:solid" 
      }
    },
    {
      "type": "minecraft:random_offset", // (2)!
      "xz_spread": 0,
      "y_spread": 1
    }
  ]
}

Searches downwards for a solid block.
Makes sure to place the dripstone on top of the solid block.

Result

Example