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|
//! Random utility functions that are useful for bots.
use azalea_core::position::{BlockPos, Vec3};
use azalea_entity::direction_looking_at;
use azalea_world::ChunkStorage;
/// Get a vec of block positions that we can reach from this position.
pub fn get_reachable_blocks_around_player(
player_position: BlockPos,
chunk_storage: &ChunkStorage,
) -> Vec<BlockPos> {
// check a 12x12x12 area around the player
let mut blocks = Vec::new();
for x in -6..=6 {
// y is 1 up to somewhat offset for the eye height
for y in -5..=7 {
for z in -6..=6 {
let block_pos = player_position + BlockPos::new(x, y, z);
let block_state = chunk_storage
.get_block_state(&block_pos)
.unwrap_or_default();
if block_state.is_air() {
// fast path, skip if it's air
continue;
}
if can_reach_block(chunk_storage, player_position, block_pos) {
blocks.push(block_pos);
}
}
}
}
blocks
}
pub fn pick_closest_block(position: BlockPos, blocks: &[BlockPos]) -> Option<BlockPos> {
// pick the closest one and mine it
let mut closest_block_pos = None;
let mut closest_distance = i32::MAX;
for block_pos in &blocks[1..] {
if block_pos.y < position.y {
// skip blocks below us at first
continue;
}
let distance = block_pos.distance_squared_to(&position);
if distance < closest_distance {
closest_block_pos = Some(*block_pos);
closest_distance = distance;
}
}
if closest_block_pos.is_none() {
// ok now check every block if the only ones around us are below
for block_pos in blocks {
let distance = block_pos.distance_squared_to(&position);
if distance < closest_distance {
closest_block_pos = Some(*block_pos);
closest_distance = distance;
}
}
}
closest_block_pos
}
/// Return the block that we'd be looking at if we were at a given position and
/// looking at a given block.
///
/// This is useful for telling if we'd be able to reach a block from a certain
/// position, like for the pathfinder's [`ReachBlockPosGoal`].
///
/// Also see [`get_hit_result_while_looking_at_with_eye_position`].
///
/// [`ReachBlockPosGoal`]: crate::pathfinder::goals::ReachBlockPosGoal
pub fn get_hit_result_while_looking_at(
chunk_storage: &ChunkStorage,
player_position: BlockPos,
look_target: BlockPos,
) -> BlockPos {
let eye_position = Vec3 {
x: player_position.x as f64 + 0.5,
y: player_position.y as f64 + 1.53,
z: player_position.z as f64 + 0.5,
};
get_hit_result_while_looking_at_with_eye_position(chunk_storage, eye_position, look_target)
}
pub fn can_reach_block(
chunk_storage: &ChunkStorage,
player_position: BlockPos,
look_target: BlockPos,
) -> bool {
let hit_result = get_hit_result_while_looking_at(chunk_storage, player_position, look_target);
hit_result == look_target
}
/// Return the block that we'd be looking at if our eyes are at a given position
/// and looking at a given block.
///
/// This is called by [`get_hit_result_while_looking_at`].
pub fn get_hit_result_while_looking_at_with_eye_position(
chunk_storage: &azalea_world::ChunkStorage,
eye_position: Vec3,
look_target: BlockPos,
) -> BlockPos {
let look_direction = direction_looking_at(&eye_position, &look_target.center());
let block_hit_result =
azalea_client::interact::pick(&look_direction, &eye_position, chunk_storage, 4.5);
block_hit_result.block_pos
}
#[cfg(test)]
mod tests {
use azalea_core::position::ChunkPos;
use azalea_world::{Chunk, PartialWorld};
use super::*;
#[test]
fn test_cannot_reach_block_through_wall_when_y_is_negative() {
let mut partial_world = PartialWorld::default();
let mut world = ChunkStorage::default();
partial_world
.chunks
.set(&ChunkPos { x: 0, z: 0 }, Some(Chunk::default()), &mut world);
let set_solid_block_at = |x, y, z| {
partial_world.chunks.set_block_state(
&BlockPos::new(x, y, z),
BlockKind::Stone.into(),
&world,
);
};
let y_offset = -8;
// walls
set_solid_block_at(1, y_offset, 0);
set_solid_block_at(1, y_offset + 1, 0);
set_solid_block_at(0, y_offset, 1);
set_solid_block_at(0, y_offset + 1, 1);
// target
set_solid_block_at(1, y_offset, 1);
let player_position = BlockPos::new(0, y_offset, 0);
let look_target = BlockPos::new(1, y_offset, 1);
assert!(!can_reach_block(&world, player_position, look_target));
}
}
|
