steel_core/behavior/blocks/vegetation/
hanging_roots_block.rs

1use steel_macros::block_behavior;
2use steel_registry::blocks::block_state_ext::BlockStateExt;
3use steel_registry::blocks::properties::BlockStateProperties;
4use steel_registry::{vanilla_blocks, vanilla_fluids};
5use steel_utils::{BlockPos, BlockStateId, Direction};
6
7use crate::behavior::block::BlockBehavior;
8use crate::behavior::context::BlockPlaceContext;
9use crate::world::{LevelReader, ScheduledTickAccess};
10
11use super::BlockRef;
12
13/// Vanilla `HangingRootsBlock` survival
14#[block_behavior]
15pub struct HangingRootsBlock {
16    block: BlockRef,
17}
18
19impl HangingRootsBlock {
20    /// Creates a new hanging roots block behavior.
21    #[must_use]
22    pub const fn new(block: BlockRef) -> Self {
23        Self { block }
24    }
25}
26
27impl BlockBehavior for HangingRootsBlock {
28    fn update_shape(
29        &self,
30        state: BlockStateId,
31        world: &dyn ScheduledTickAccess,
32        pos: BlockPos,
33        direction: Direction,
34        _neighbor_pos: BlockPos,
35        _neighbor_state: BlockStateId,
36    ) -> BlockStateId {
37        if direction == Direction::Up && !self.can_survive(state, world, pos) {
38            return vanilla_blocks::AIR.default_state();
39        }
40
41        if state.get_value(&BlockStateProperties::WATERLOGGED) {
42            let delay = world.fluid_tick_delay(&vanilla_fluids::WATER);
43            let _ = world.schedule_fluid_tick_default(pos, &vanilla_fluids::WATER, delay);
44        }
45
46        state
47    }
48
49    fn can_survive(&self, _state: BlockStateId, world: &dyn LevelReader, pos: BlockPos) -> bool {
50        // Vanilla: the block above must be face-sturdy on its DOWN face.
51        let above_pos = pos.above();
52        let above = world.get_block_state(above_pos);
53        world.is_face_sturdy(above, above_pos, Direction::Down)
54    }
55
56    fn get_state_for_placement(&self, context: &BlockPlaceContext<'_>) -> Option<BlockStateId> {
57        let state = self.block.default_state();
58        if !self.can_survive(state, context.world, context.place_pos()) {
59            return None;
60        }
61        Some(state.set_value(
62            &BlockStateProperties::WATERLOGGED,
63            context.is_water_source(),
64        ))
65    }
66}
steel_core/behavior/blocks/vegetation/hanging_roots_block.rs

steel_core/behavior/blocks/vegetation/
hanging_roots_block.rs
