steel_core/behavior/blocks/vegetation/
coral_block.rs

1use std::sync::Arc;
2
3use steel_macros::block_behavior;
4use steel_registry::blocks::block_state_ext::BlockStateExt;
5use steel_registry::blocks::properties::{BlockStateProperties, BoolProperty, Direction};
6use steel_registry::fluid::FluidStateExt;
7use steel_utils::{BlockPos, BlockStateId, types::UpdateFlags};
8
9use crate::behavior::block::BlockBehavior;
10use crate::behavior::context::BlockPlaceContext;
11use crate::world::{LevelReader, ScheduledTickAccess, World};
12
13use super::BlockRef;
14
15/// Vanilla `CoralBlock` survival.
16#[block_behavior]
17pub struct CoralBlock {
18    block: BlockRef,
19    #[json_arg(vanilla_blocks, json = "dead_block")]
20    dead_block: BlockRef,
21}
22
23const WATERLOGGED: &BoolProperty = &BlockStateProperties::WATERLOGGED;
24const MIN_WATER_CHECK_DELAY: i32 = 60;
25
26impl CoralBlock {
27    /// Creates a new live coral block behavior.
28    #[must_use]
29    pub const fn new(block: BlockRef, dead_block: BlockRef) -> Self {
30        Self { block, dead_block }
31    }
32
33    fn dead_state(&self) -> BlockStateId {
34        self.dead_block.default_state()
35    }
36    /// Vanilla `BaseCoralPlantTypeBlock.canSurvive` (also `BaseCoralFanBlock`,
37    /// `CoralPlantBlock`, `CoralFanBlock`).
38    ///
39    /// The block below must be face-sturdy on its UP face.
40    pub(super) fn can_survive(world: &dyn LevelReader, pos: BlockPos) -> bool {
41        let below_pos = pos.below();
42        let below = world.get_block_state(below_pos);
43        world.is_face_sturdy(below, below_pos, Direction::Up)
44    }
45
46    pub(super) fn scan_for_water(
47        state: BlockStateId,
48        world: &dyn LevelReader,
49        pos: BlockPos,
50    ) -> bool {
51        if state.try_get_value(WATERLOGGED) == Some(true) {
52            return true;
53        }
54
55        Direction::ALL.iter().any(|direction| {
56            world
57                .get_block_state(pos.relative(*direction))
58                .get_fluid_state()
59                .is_water()
60        })
61    }
62
63    pub(super) fn schedule_die_tick(
64        state: BlockStateId,
65        world: &dyn ScheduledTickAccess,
66        pos: BlockPos,
67        block: BlockRef,
68    ) {
69        if Self::scan_for_water(state, world, pos) {
70            return;
71        }
72
73        // Intentional Steel divergence: incidental runtime timing does not use world RNG.
74        let delay = MIN_WATER_CHECK_DELAY + rand::random_range(0..40);
75        let _ = world.schedule_block_tick_default(pos, block, delay);
76    }
77}
78
79impl BlockBehavior for CoralBlock {
80    fn update_shape(
81        &self,
82        state: BlockStateId,
83        world: &dyn ScheduledTickAccess,
84        pos: BlockPos,
85        _direction: Direction,
86        _neighbor_pos: BlockPos,
87        _neighbor_state: BlockStateId,
88    ) -> BlockStateId {
89        Self::schedule_die_tick(state, world, pos, self.block);
90
91        state
92    }
93
94    fn get_state_for_placement(&self, context: &BlockPlaceContext<'_>) -> Option<BlockStateId> {
95        let state = self.block.default_state();
96        Self::schedule_die_tick(state, context.world, context.place_pos(), self.block);
97        Some(state)
98    }
99
100    fn tick(&self, state: BlockStateId, world: &Arc<World>, pos: BlockPos) {
101        if !Self::scan_for_water(state, world, pos) {
102            world.set_block(pos, self.dead_state(), UpdateFlags::UPDATE_CLIENTS);
103        }
104    }
105}
steel_core/behavior/blocks/vegetation/coral_block.rs

steel_core/behavior/blocks/vegetation/
coral_block.rs
