Feat: dirt path

steel-core/src/behavior/blocks/mod.rs

@@ -48,11 +48,11 @@ pub use vegetation::{
     BaseCoralFanBlock, BaseCoralPlantBlock, BaseCoralWallFanBlock, BigDripleafBlock,
     BigDripleafStemBlock, BushBlock, CarpetBlock, CaveVinesBlock, CaveVinesPlantBlock,
     ChorusFlowerBlock, ChorusPlantBlock, CoralFanBlock, CoralPlantBlock, CoralWallFanBlock,
-    DryVegetationBlock, EyeblossomBlock, EyeblossomType, FarmlandBlock, FireflyBushBlock,
-    FlowerBedBlock, GlowLichenBlock, HangingMossBlock, HangingRootsBlock, KelpBlock,
-    KelpPlantBlock, LeafLitterBlock, LilyPadBlock, MangrovePropaguleBlock, MossyCarpetBlock,
-    MushroomBlock, NetherFungusBlock, NetherRootsBlock, PointedDripstoneBlock, SaplingBlock,
-    SculkVeinBlock, SeaPickleBlock, ShortDryGrassBlock, SmallDripleafBlock, SnowLayerBlock,
-    SporeBlossomBlock, SulfurSpikeBlock, TallDryGrassBlock, TwistingVinesBlock,
+    DirtPathBlock, DryVegetationBlock, EyeblossomBlock, EyeblossomType, FarmlandBlock,
+    FireflyBushBlock, FlowerBedBlock, GlowLichenBlock, HangingMossBlock, HangingRootsBlock,
+    KelpBlock, KelpPlantBlock, LeafLitterBlock, LilyPadBlock, MangrovePropaguleBlock,
+    MossyCarpetBlock, MushroomBlock, NetherFungusBlock, NetherRootsBlock, PointedDripstoneBlock,
+    SaplingBlock, SculkVeinBlock, SeaPickleBlock, ShortDryGrassBlock, SmallDripleafBlock,
+    SnowLayerBlock, SporeBlossomBlock, SulfurSpikeBlock, TallDryGrassBlock, TwistingVinesBlock,
     TwistingVinesPlantBlock, VineBlock, WeepingVinesBlock, WeepingVinesPlantBlock, WitherRoseBlock,
 };

steel-core/src/behavior/blocks/vegetation/dirt_path_block.rs

@@ -0,0 +1,78 @@
+use std::sync::Arc;
+
+use steel_macros::block_behavior;
+use steel_registry::blocks::BlockRef;
+use steel_registry::blocks::block_state_ext::BlockStateExt;
+use steel_registry::vanilla_block_tags::BlockTag;
+use steel_registry::vanilla_blocks;
+use steel_utils::{BlockPos, BlockStateId, Direction};
+
+use crate::behavior::block::{BlockBehavior, push_entities_up};
+use crate::behavior::context::BlockPlaceContext;
+use crate::entity::ai::path::PathComputationType;
+use crate::world::{LevelReader, ScheduledTickAccess, World};
+
+use super::FarmlandBlock;
+
+/// Behavior for dirt path blocks.
+#[block_behavior]
+pub struct DirtPathBlock {
+    block: BlockRef,
+}
+
+impl DirtPathBlock {
+    /// Creates a new dirt path block behavior.
+    #[must_use]
+    pub const fn new(block: BlockRef) -> Self {
+        Self { block }
+    }
+}
+
+impl BlockBehavior for DirtPathBlock {
+    fn get_state_for_placement(&self, context: &BlockPlaceContext<'_>) -> Option<BlockStateId> {
+        let path_state = self.block.default_state();
+        let pos = context.place_pos();
+        if self.can_survive(path_state, context.world, pos) {
+            Some(path_state)
+        } else {
+            Some(push_entities_up(
+                path_state,
+                vanilla_blocks::DIRT.default_state(),
+                context.world,
+                pos,
+            ))
+        }
+    }
+
+    fn can_survive(&self, _state: BlockStateId, world: &dyn LevelReader, pos: BlockPos) -> bool {
+        let above = world.get_block_state(pos.above());
+        !above.is_solid() || above.get_block().has_tag(&BlockTag::FENCE_GATES)
+    }
+
+    fn update_shape(
+        &self,
+        state: BlockStateId,
+        world: &dyn ScheduledTickAccess,
+        pos: BlockPos,
+        direction: Direction,
+        _neighbor_pos: BlockPos,
+        _neighbor_state: BlockStateId,
+    ) -> BlockStateId {
+        if direction == Direction::Up && !self.can_survive(state, world, pos) {
+            let _ = world.schedule_block_tick_default(pos, self.block, 1);
+        }
+        state
+    }
+
+    fn tick(&self, state: BlockStateId, world: &Arc<World>, pos: BlockPos) {
+        FarmlandBlock::turn_to_dirt(state, world, pos, None);
+    }
+
+    fn is_pathfindable(
+        &self,
+        _state: BlockStateId,
+        _computation_type: PathComputationType,
+    ) -> bool {
+        false
+    }
+}

steel-core/src/behavior/blocks/vegetation/farmland_block.rs

@@ -102,7 +102,7 @@ impl FarmlandBlock {
     }
 
     /// Turns the farmland into dirt.
-    fn turn_to_dirt(
+    pub(crate) fn turn_to_dirt(
         state: BlockStateId,
         world: &Arc<World>,
         pos: BlockPos,

steel-core/src/behavior/blocks/vegetation/mod.rs

@@ -25,6 +25,7 @@ mod coral_fan_block;
 mod coral_plant_block;
 mod coral_wall_fan_block;
 mod crop_block;
+mod dirt_path_block;
 mod double_plant_block;
 mod dry_vegetation_block;
 mod eyeblossom_block;
@@ -101,6 +102,7 @@ pub use coral_fan_block::CoralFanBlock;
 pub use coral_plant_block::CoralPlantBlock;
 pub use coral_wall_fan_block::CoralWallFanBlock;
 pub use crop_block::CropBlock;
+pub use dirt_path_block::DirtPathBlock;
 pub use double_plant_block::DoublePlantBlock;
 pub use dry_vegetation_block::DryVegetationBlock;
 pub use eyeblossom_block::{EyeblossomBlock, EyeblossomType};