save tile texture id into map

game/main/src/utlis/chunk_utils.rs

@@ -2,6 +2,7 @@
 use bevy::log::*;
 use bevy::{asset::Assets, ecs::system::Res, math::Vec3, render::mesh::Mesh};
 use bevy_rapier3d::geometry::{Collider, TriMeshFlags};
+use rayon::iter::{IntoParallelRefMutIterator, ParallelIterator};
 use world_generation::{
 	biome_painter::BiomePainterAsset,
 	chunk_colliders::generate_chunk_collider,
@@ -12,16 +13,41 @@ use world_generation::{
 	tile_mapper::TileMapperAsset,
 };
 
-pub fn prepare_chunk_mesh(
-	chunk: &Chunk,
-	heightmap: &Map,
+pub fn paint_map(
+	map: &mut Map,
 	painter: &BiomePainterAsset,
-	tile_assets: &Res<Assets<TileAsset>>,
-	tile_mappers: &Res<Assets<TileMapperAsset>>,
-) -> (Mesh, (Vec<Vec3>, Vec<[u32; 3]>), Vec3, usize) {
+	tiles: &Res<Assets<TileAsset>>,
+	mappers: &Res<Assets<TileMapperAsset>>,
+) {
+	map.chunks.par_iter_mut().for_each(|chunk: &mut Chunk| {
+		paint_chunk(chunk, painter, tiles, mappers);
+	});
+}
+
+pub fn paint_chunk(
+	chunk: &mut Chunk,
+	painter: &BiomePainterAsset,
+	tiles: &Res<Assets<TileAsset>>,
+	mappers: &Res<Assets<TileMapperAsset>>,
+) {
+	for z in 0..Chunk::SIZE {
+		for x in 0..Chunk::SIZE {
+			let idx = x + z * Chunk::SIZE;
+			let height = chunk.heights[idx];
+			let moisture = chunk.moisture[idx];
+			let temperature = chunk.temperature[idx];
+			let biome = mappers.get(painter.sample_biome(moisture, temperature));
+			let tile_handle = biome.unwrap().sample_tile(height);
+			let tile = tiles.get(tile_handle).unwrap();
+			chunk.textures[idx] = [tile.texture_id, tile.side_texture_id];
+		}
+	}
+}
+
+pub fn prepare_chunk_mesh(chunk: &Chunk, heightmap: &Map) -> (Mesh, (Vec<Vec3>, Vec<[u32; 3]>), Vec3, usize) {
 	#[cfg(feature = "tracing")]
 	let _gen_mesh = info_span!("Generate Chunk").entered();
-	let mesh = generate_chunk_mesh(chunk, &heightmap, painter, &tile_assets, &tile_mappers);
+	let mesh = generate_chunk_mesh(chunk, &heightmap);
 	let col_data = generate_chunk_collider(chunk, &heightmap);
 
 	return (
@@ -32,15 +58,8 @@ pub fn prepare_chunk_mesh(
 	);
 }
 
-pub fn prepare_chunk_mesh_with_collider(
-	chunk: &Chunk,
-	heightmap: &Map,
-	painter: &BiomePainterAsset,
-	tile_assets: &Res<Assets<TileAsset>>,
-	tile_mappers: &Res<Assets<TileMapperAsset>>,
-) -> (Mesh, Collider, Vec3, usize) {
-	let (mesh, (col_verts, col_indicies), pos, index) =
-		prepare_chunk_mesh(chunk, heightmap, painter, tile_assets, tile_mappers);
+pub fn prepare_chunk_mesh_with_collider(chunk: &Chunk, heightmap: &Map) -> (Mesh, Collider, Vec3, usize) {
+	let (mesh, (col_verts, col_indicies), pos, index) = prepare_chunk_mesh(chunk, heightmap);
 	let collider: Collider;
 	{
 		#[cfg(feature = "tracing")]