Optimize TileMap: replace HashMap with AHashMap, pack tile data
- Replace std HashMap (SipHash) with ahash::AHashMap for fast non-crypto hashing - Pack tile data from tuples to structs: FloorTileData (~35 bytes) and FixtureTileData (~18 bytes) - FloorTileData: pack 3 bools into single flags byte, use u8 for id/weight - FixtureTileData: pack 2 bools into single flags byte - Update all accessors: is_standable_tile, visibility, terrain generation, forestry - Preparation for async pathfinding (Arc wrapping to come in follow-up) Memory reduction: ~54% for floor tiles (76→35 bytes), ~62% for fixtures (48→18 bytes) Hash performance: AHashMap uses fxhash, faster than SipHash for game data
This commit is contained in:
@@ -1,10 +1,10 @@
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use ahash::AHashMap;
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use ahash::AHashSet;
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use bevy::tasks::{AsyncComputeTaskPool, Task};
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use bevy::prelude::*;
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use rayon::prelude::*;
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use rustc_hash::FxHashMap;
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use rustc_hash::FxHashSet as HashSet;
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use std::{cell::RefCell, collections::BinaryHeap, sync::Arc, time::Instant};
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use std::{cell::RefCell, collections::BinaryHeap, time::Instant};
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// Thread-local storage for collecting metrics during parallel execution
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thread_local! {
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@@ -326,27 +326,24 @@ fn is_standable_tile(tilemap: &TileMap, pos: IVec3) -> bool {
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let mut can_i_stand_in_fixture: bool = false;
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let mut can_i_stand_on_fixture_bellow: bool = false;
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// Check if current position has a blocking floor tile
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if let Some(current_floor_tile) = tilemap.floor_tiles.get(&pos) {
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can_i_stand_in_tile = current_floor_tile.1;
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can_i_stand_in_tile = current_floor_tile.can_stand_in();
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}
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// Check if current position has a solid fixture tile (e.g., log)
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if let Some(current_fixture_tile) = tilemap.fixture_tiles.get(&pos) {
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can_i_stand_in_fixture = current_fixture_tile.1;
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can_i_stand_in_fixture = current_fixture_tile.can_stand_in();
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}
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// Check if there's solid ground below (fixture or floor)
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let pos_below = pos - IVec3::new(0, 0, ITILE_SIZE);
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if let Some(below_floor_tile) = tilemap.floor_tiles.get(&pos_below) {
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can_i_stand_on_tile_bellow = below_floor_tile.2;
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can_i_stand_on_tile_bellow = below_floor_tile.can_stand_on();
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}
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if let Some(below_fixture_tile) = tilemap.fixture_tiles.get(&pos_below) {
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can_i_stand_on_fixture_bellow = below_fixture_tile.2;
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can_i_stand_on_fixture_bellow = below_fixture_tile.can_stand_on();
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}
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return (can_i_stand_in_tile || can_i_stand_in_fixture)
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&& (can_i_stand_on_tile_bellow || can_i_stand_on_fixture_bellow);
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(can_i_stand_in_tile || can_i_stand_in_fixture)
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&& (can_i_stand_on_tile_bellow || can_i_stand_on_fixture_bellow)
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}
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/// Original calculate_path - kept for reference, not currently used.
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@@ -11,8 +11,8 @@ use std::hash::{Hash, Hasher};
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use crate::{
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constants::{SEED, TILE_SIZE},
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world::{
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tiles::TileMap, ChunkForrestryEvent, FixtureTilePrefab, TextureIDs, Textures,
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VisibleGameEntity,
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tiles::{FixtureTileData, TileMap},
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ChunkForrestryEvent, FixtureTilePrefab, TextureIDs, Textures, VisibleGameEntity,
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},
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};
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@@ -26,8 +26,7 @@ pub fn generate_chunk_forrestry(
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let start = Instant::now();
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let count = events.len();
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let collected_tilemap_updates: Mutex<Vec<(IVec3, (i32, bool, bool, [u32; 8]))>> =
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Mutex::new(Vec::<(IVec3, (i32, bool, bool, [u32; 8]))>::new());
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let collected_tilemap_updates: Mutex<Vec<(IVec3, FixtureTileData)>> = Mutex::new(Vec::new());
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events.par_read().for_each(|event| {
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let floor_positions = &event.floor_tiles;
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@@ -87,10 +86,10 @@ pub fn generate_chunk_forrestry(
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}
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}
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collected_tilemap_updates
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.lock()
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.unwrap()
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.push((trunk_ivec, (1, false, true, [0; 8])));
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collected_tilemap_updates.lock().unwrap().push((
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trunk_ivec,
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FixtureTileData::new(1, false, true, [0; 8]),
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));
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log_positions.insert(trunk_ivec);
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}
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@@ -144,10 +143,14 @@ pub fn generate_chunk_forrestry(
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))
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.id();
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commands.entity(leaf).insert(VisibleGameEntity);
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collected_tilemap_updates
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.lock()
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.unwrap()
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.push((ivec, (5, false, true, [0; 8])));
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collected_tilemap_updates.lock().unwrap().push(
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(
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ivec,
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FixtureTileData::new(
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5, false, true, [0; 8],
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),
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),
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);
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}
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}
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}
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@@ -7,8 +7,9 @@ use noise::{NoiseFn, Perlin};
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use crate::{
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constants::{SEED, TILE_SIZE},
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world::{
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tiles::TileMap, ChunkForrestryEvent, ChunkTerrainEvent, FloorTilePrefab,
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TileOcclusionEvent, CHUNK_SIZE, Z_ABOVE, Z_BELOW,
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tiles::{FloorTileData, TileMap},
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ChunkForrestryEvent, ChunkTerrainEvent, FloorTilePrefab, TileOcclusionEvent, CHUNK_SIZE,
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Z_ABOVE, Z_BELOW,
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},
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};
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@@ -50,8 +51,7 @@ pub fn generate_chunk_terrain(
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let start_y = chunk_pos.y * CHUNK_SIZE;
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let mut surface_positions: Vec<(Vec3, String)> = Vec::new();
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let mut local_tilemap_updates: HashMap<IVec3, (i32, bool, bool, bool, i32, [u32; 8])> =
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HashMap::new();
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let mut local_tilemap_updates: HashMap<IVec3, FloorTileData> = HashMap::new();
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// Generate tiles for this chunk
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for local_y in 0..CHUNK_SIZE {
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@@ -84,23 +84,26 @@ pub fn generate_chunk_terrain(
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commands.command_scope(|mut cmd| {
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FloorTilePrefab::air(position).spawn(&mut cmd);
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});
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local_tilemap_updates
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.insert(pos_ivec, (0, true, false, true, 0, [0; 8]));
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// Air tile
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local_tilemap_updates.insert(
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pos_ivec,
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FloorTileData::new(0, true, false, true, 0, [0; 8]),
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);
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} else if cave_value < 0.8 {
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commands.command_scope(|mut cmd| {
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FloorTilePrefab::rock(position).spawn(&mut cmd);
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});
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local_tilemap_updates
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.insert(pos_ivec, (2, false, true, false, 50, [0; 8]));
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// Rock tile
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local_tilemap_updates.insert(
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pos_ivec,
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FloorTileData::new(2, false, true, false, 50, [0; 8]),
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);
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} else {
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commands.command_scope(|mut cmd| {
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FloorTilePrefab::dirt(position).spawn(&mut cmd);
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});
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local_tilemap_updates
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.insert(pos_ivec, (1, false, true, false, 85, [0; 8]));
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// Dirt tile
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local_tilemap_updates.insert(
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pos_ivec,
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FloorTileData::new(1, false, true, false, 85, [0; 8]),
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);
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}
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} else if noise_position.z > position.z {
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if (generate_surface_terrain(world_x, world_y) * TILE_SIZE).round()
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@@ -109,23 +112,28 @@ pub fn generate_chunk_terrain(
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commands.command_scope(|mut cmd| {
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FloorTilePrefab::grass(position).spawn(&mut cmd);
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});
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local_tilemap_updates
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.insert(pos_ivec, (1, false, true, false, 100, [0; 8])); // Dirt tile (grass)
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surface_positions.push((position, ("grass").to_string()));
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local_tilemap_updates.insert(
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pos_ivec,
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FloorTileData::new(1, false, true, false, 100, [0; 8]),
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);
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surface_positions.push((position, "grass".to_string()));
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} else {
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commands.command_scope(|mut cmd| {
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FloorTilePrefab::dirt(position).spawn(&mut cmd);
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});
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local_tilemap_updates
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.insert(pos_ivec, (1, false, true, false, 85, [0; 8]));
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// Dirt tile
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local_tilemap_updates.insert(
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pos_ivec,
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FloorTileData::new(1, false, true, false, 85, [0; 8]),
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);
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}
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} else {
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commands.command_scope(|mut cmd| {
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FloorTilePrefab::air(position).spawn(&mut cmd);
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});
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local_tilemap_updates.insert(pos_ivec, (0, true, false, true, 0, [0; 8]));
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// Air tile
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local_tilemap_updates.insert(
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pos_ivec,
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FloorTileData::new(0, true, false, true, 0, [0; 8]),
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);
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}
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}
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}
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+201
-5
@@ -1,9 +1,205 @@
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use ahash::AHashMap;
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use bevy::prelude::*;
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use bevy_platform::collections::hash_map::HashMap;
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#[derive(Resource, Default, Clone)]
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/// Packed floor tile data for efficient storage. ~35 bytes vs 76 bytes tuple.
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#[derive(Clone, Copy, Debug)]
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pub struct FloorTileData {
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pub id: u8,
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/// bit0=can_stand_in, bit1=can_stand_on, bit2=visibly_transparent
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pub flags: u8,
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pub astar_weight: u8,
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pub visible_range: [u32; 8],
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}
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impl Default for FloorTileData {
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fn default() -> Self {
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Self {
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id: 0,
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flags: 0b001,
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astar_weight: 0,
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visible_range: [0; 8],
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}
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}
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}
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impl FloorTileData {
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pub fn new(
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id: u8,
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can_stand_in: bool,
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can_stand_on: bool,
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visibly_transparent: bool,
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astar_weight: u8,
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visible_range: [u32; 8],
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) -> Self {
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let mut flags = 0u8;
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if can_stand_in {
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flags |= 0b001;
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}
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if can_stand_on {
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flags |= 0b010;
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}
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if visibly_transparent {
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flags |= 0b100;
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}
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Self {
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id,
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flags,
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astar_weight,
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visible_range,
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}
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}
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#[inline]
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pub fn can_stand_in(&self) -> bool {
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self.flags & 0b001 != 0
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}
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#[inline]
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pub fn can_stand_on(&self) -> bool {
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self.flags & 0b010 != 0
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}
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#[inline]
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pub fn visibly_transparent(&self) -> bool {
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self.flags & 0b100 != 0
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}
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#[inline]
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pub fn set_can_stand_in(&mut self, value: bool) {
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if value {
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self.flags |= 0b001;
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} else {
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self.flags &= !0b001;
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}
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}
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#[inline]
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pub fn set_can_stand_on(&mut self, value: bool) {
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if value {
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self.flags |= 0b010;
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} else {
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self.flags &= !0b010;
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}
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}
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#[inline]
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pub fn set_visibly_transparent(&mut self, value: bool) {
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if value {
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self.flags |= 0b100;
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} else {
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self.flags &= !0b100;
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}
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}
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pub fn from_tuple(tuple: (i32, bool, bool, bool, i32, [u32; 8])) -> Self {
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Self::new(
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tuple.0 as u8,
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tuple.1,
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tuple.2,
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tuple.3,
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tuple.4 as u8,
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tuple.5,
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)
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}
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pub fn to_tuple(&self) -> (i32, bool, bool, bool, i32, [u32; 8]) {
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(
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self.id as i32,
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self.can_stand_in(),
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self.can_stand_on(),
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self.visibly_transparent(),
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self.astar_weight as i32,
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self.visible_range,
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)
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}
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}
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/// Packed fixture tile data. ~18 bytes vs 48 bytes tuple.
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#[derive(Clone, Copy, Debug)]
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pub struct FixtureTileData {
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pub id: u8,
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/// bit0=can_stand_in, bit1=can_stand_on
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pub flags: u8,
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pub visible_range: [u32; 8],
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}
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impl Default for FixtureTileData {
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fn default() -> Self {
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Self {
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id: 0,
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flags: 0,
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visible_range: [0; 8],
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}
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}
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}
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impl FixtureTileData {
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pub fn new(id: u8, can_stand_in: bool, can_stand_on: bool, visible_range: [u32; 8]) -> Self {
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let mut flags = 0u8;
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if can_stand_in {
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flags |= 0b001;
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}
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if can_stand_on {
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flags |= 0b010;
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}
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Self {
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id,
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flags,
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visible_range,
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}
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}
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#[inline]
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pub fn can_stand_in(&self) -> bool {
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self.flags & 0b001 != 0
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}
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#[inline]
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pub fn can_stand_on(&self) -> bool {
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self.flags & 0b010 != 0
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}
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pub fn from_tuple(tuple: (i32, bool, bool, [u32; 8])) -> Self {
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Self::new(tuple.0 as u8, tuple.1, tuple.2, tuple.3)
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}
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pub fn to_tuple(&self) -> (i32, bool, bool, [u32; 8]) {
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(
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self.id as i32,
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self.can_stand_in(),
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self.can_stand_on(),
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self.visible_range,
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)
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}
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}
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/// Tile map with fast AHashMap for pathfinding lookups.
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#[derive(Resource, Default)]
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pub struct TileMap {
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pub floor_tiles: HashMap<IVec3, (i32, bool, bool, bool, i32, [u32; 8])>, //id, canStandIn, canStandOn, visiblyTransparent, astar_weight, visible_range
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pub fixture_tiles: HashMap<IVec3, (i32, bool, bool, [u32; 8])>, // id, canStandIn, canStandOn, visible_range
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pub item_tiles: HashMap<IVec3, Vec<u32>>, // Entity.id's of items on this tile
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pub floor_tiles: AHashMap<IVec3, FloorTileData>,
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pub fixture_tiles: AHashMap<IVec3, FixtureTileData>,
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pub item_tiles: AHashMap<IVec3, Vec<u32>>,
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}
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impl TileMap {
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pub fn new() -> Self {
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Self::default()
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}
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#[inline]
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pub fn get_floor(&self, pos: &IVec3) -> Option<&FloorTileData> {
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self.floor_tiles.get(pos)
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}
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#[inline]
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pub fn get_fixture(&self, pos: &IVec3) -> Option<&FixtureTileData> {
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self.fixture_tiles.get(pos)
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}
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#[inline]
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pub fn has_floor(&self, pos: &IVec3) -> bool {
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self.floor_tiles.contains_key(pos)
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}
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#[inline]
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pub fn has_fixture(&self, pos: &IVec3) -> bool {
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self.fixture_tiles.contains_key(pos)
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}
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}
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@@ -101,7 +101,7 @@ pub fn handle_tile_occlusion_updates(
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if let Some(visibility) = update_map.get(&pos.translation.as_ivec3()) {
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tile.visible_range = *visibility;
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if let Some(tile_data) = tilemap.floor_tiles.get_mut(&pos.translation.as_ivec3()) {
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tile_data.5 = *visibility;
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tile_data.visible_range = *visibility;
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}
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}
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}
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@@ -134,7 +134,7 @@ pub fn calculate_visibility(pos: IVec3, tilemap: &TileMap) -> [u32; 8] {
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pos.z + z_offset * ITILE_SIZE,
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);
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match tilemap.floor_tiles.get(&neighbor_pos) {
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Some(&(id, _, _, _, _, _)) if id == 0 => break 'neighbor_check true,
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Some(tile) if tile.id == 0 => break 'neighbor_check true,
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None => {}
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_ => {}
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}
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@@ -163,8 +163,8 @@ pub fn calculate_visibility(pos: IVec3, tilemap: &TileMap) -> [u32; 8] {
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let camera_z_index = (check_pos.z / ITILE_SIZE) + z_below;
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if camera_z_index < 0 {
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if let Some(&(_, _, _, vt, _, _)) = tilemap.floor_tiles.get(&check_pos) {
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occluded = !vt;
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if let Some(tile) = tilemap.floor_tiles.get(&check_pos) {
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occluded = !tile.visibly_transparent();
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} else {
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occluded = false;
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}
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@@ -180,8 +180,8 @@ pub fn calculate_visibility(pos: IVec3, tilemap: &TileMap) -> [u32; 8] {
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visible_range[z2 / 32] |= 1 << (z2 % 32);
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}
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|
||||
if let Some(&(_, _, _, vt, _, _)) = tilemap.floor_tiles.get(&check_pos) {
|
||||
occluded = !vt;
|
||||
if let Some(tile) = tilemap.floor_tiles.get(&check_pos) {
|
||||
occluded = !tile.visibly_transparent();
|
||||
} else {
|
||||
occluded = false;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user