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|
use super::Shapes;
use crate::collision::{BlockWithShape, VoxelShape, AABB};
use azalea_block::BlockState;
use azalea_core::{ChunkPos, ChunkSectionPos, Cursor3d, CursorIterationType, EPSILON};
use azalea_world::{Chunk, Instance};
use parking_lot::RwLock;
use std::sync::Arc;
pub fn get_block_collisions(world: &Instance, aabb: AABB) -> BlockCollisions<'_> {
BlockCollisions::new(world, aabb)
}
pub struct BlockCollisions<'a> {
pub world: &'a Instance,
pub aabb: AABB,
pub entity_shape: VoxelShape,
pub cursor: Cursor3d,
pub only_suffocating_blocks: bool,
}
impl<'a> BlockCollisions<'a> {
pub fn new(world: &'a Instance, aabb: AABB) -> Self {
let origin_x = (aabb.min_x - EPSILON).floor() as i32 - 1;
let origin_y = (aabb.min_y - EPSILON).floor() as i32 - 1;
let origin_z = (aabb.min_z - EPSILON).floor() as i32 - 1;
let end_x = (aabb.max_x + EPSILON).floor() as i32 + 1;
let end_y = (aabb.max_y + EPSILON).floor() as i32 + 1;
let end_z = (aabb.max_z + EPSILON).floor() as i32 + 1;
let cursor = Cursor3d::new(origin_x, origin_y, origin_z, end_x, end_y, end_z);
Self {
world,
aabb,
entity_shape: VoxelShape::from(aabb),
cursor,
only_suffocating_blocks: false,
}
}
fn get_chunk(&self, block_x: i32, block_z: i32) -> Option<Arc<RwLock<Chunk>>> {
let chunk_x = ChunkSectionPos::block_to_section_coord(block_x);
let chunk_z = ChunkSectionPos::block_to_section_coord(block_z);
let chunk_pos = ChunkPos::new(chunk_x, chunk_z);
// TODO: minecraft caches chunk here
// int chunkX = SectionPos.blockToSectionCoord(blockX);
// int chunkZ = SectionPos.blockToSectionCoord(blockZ);
// long chunkPosLong = ChunkPos.asLong(chunkX, chunkZ);
// if (this.cachedBlockGetter != null && this.cachedBlockGetterPos == var5) {
// return this.cachedBlockGetter;
// } else {
// BlockGetter var7 = this.collisionGetter.getChunkForCollisions(chunkX,
// chunkZ); this.cachedBlockGetter = var7;
// this.cachedBlockGetterPos = chunkPosLong;
// return var7;
// }
self.world.chunks.get(&chunk_pos)
}
}
impl<'a> Iterator for BlockCollisions<'a> {
type Item = VoxelShape;
fn next(&mut self) -> Option<Self::Item> {
while let Some(item) = self.cursor.next() {
if item.iteration_type == CursorIterationType::Corner {
continue;
}
let chunk = self.get_chunk(item.pos.x, item.pos.z);
let Some(chunk) = chunk else {
continue
};
let pos = item.pos;
let block_state: BlockState = chunk
.read()
.get(&(&pos).into(), self.world.chunks.min_y)
.unwrap_or(BlockState::AIR);
// TODO: continue if self.only_suffocating_blocks and the block is not
// suffocating
let block_shape = block_state.shape();
// if it's a full block do a faster collision check
if block_shape == &crate::collision::block_shape() {
if !self.aabb.intersects_aabb(&AABB {
min_x: item.pos.x as f64,
min_y: item.pos.y as f64,
min_z: item.pos.z as f64,
max_x: (item.pos.x + 1) as f64,
max_y: (item.pos.y + 1) as f64,
max_z: (item.pos.z + 1) as f64,
}) {
continue;
}
return Some(block_shape.move_relative(
item.pos.x as f64,
item.pos.y as f64,
item.pos.z as f64,
));
}
let block_shape =
block_shape.move_relative(item.pos.x as f64, item.pos.y as f64, item.pos.z as f64);
// if the entity shape and block shape don't collide, continue
if !Shapes::matches_anywhere(&block_shape, &self.entity_shape, |a, b| a && b) {
continue;
}
return Some(block_shape);
}
None
}
}
|
