Replace single block feature

The replace_single_block feature allows you to randomly replace blocks with another block.

Configuration

The replace_single_block feature has a single option, targets which similar to the targets option in the ore feature, allows you to specify which block states should be replaced with which other block states. Each Target has the following options:

Option	Type	Description
target	A RuleTest. Check out the ores page for more information.	The test to check if the block should be replaced.
state	A BlockState	The block state to replace the target with.

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

Example

As an example, here's a feature to randomly replace acacia logs with stone.

KotlinJson

ConfiguredFeatures.kt

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

    val ACACIA_LOGS_TO_STONE = registerConfiguredFeature(
        "acacia_logs_to_stone",
        Feature.REPLACE_SINGLE_BLOCK,
        ReplaceBlockConfiguration(
            listOf(
                OreConfiguration.target(TagMatchTest(BlockTags.ACACIA_LOGS), Blocks.STONE.defaultBlockState())
            )
        )
    )

}

Or, if you only want to replace one specific block state

ConfiguredFeatures.kt

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

    val ACACIA_LOGS_TO_STONE = registerConfiguredFeature(
        "acacia_logs_to_stone",
        Feature.REPLACE_SINGLE_BLOCK,
        ReplaceBlockConfiguration(
            Blocks.ACACIA_LOG.defaultBlockState(),
            Blocks.STONE.defaultBlockState(),
        )
    )

}

configured_feature/acacia_logs_to_stone.json

{
  "type": "minecraft:replace_single_block",
  "config": {
    "targets": [
      {
        "target": {
          "predicate_type": "minecraft:tag_match",
          "tag": "minecraft:acacia_logs"
        },
        "state": {
          "Name": "minecraft:stone"
        }
      }
    ]
  }
}