chunk rebuilder system

refactoring

game/main/src/map_rendering/chunk_rebuild.rs

@@ -0,0 +1,90 @@
+use bevy::prelude::*;
+use bevy_rapier3d::geometry::{Collider, TriMeshFlags};
+use rayon::iter::{IntoParallelRefIterator, ParallelIterator};
+use world_generation::{
+	biome_painter::BiomePainterAsset,
+	chunk_colliders::generate_chunk_collider,
+	hex_utils::{self, offset_to_world, SHORT_DIAGONAL},
+	mesh_generator::generate_chunk_mesh,
+	prelude::{Chunk, Map},
+	tile_manager::TileAsset,
+	tile_mapper::TileMapperAsset,
+};
+
+use crate::{
+	prelude::{ChunkAtlas, PhosChunk, PhosChunkRegistry},
+	utlis::render_distance_system::RenderDistanceVisibility,
+};
+
+use super::prelude::CurrentBiomePainter;
+pub struct ChunkRebuildPlugin;
+
+impl Plugin for ChunkRebuildPlugin {
+	fn build(&self, app: &mut App) {
+		app.insert_resource(ChunkRebuildQueue::default());
+		app.add_systems(PostUpdate, chunk_rebuilder);
+	}
+}
+
+#[derive(Resource, Default)]
+pub struct ChunkRebuildQueue {
+	pub queue: Vec<usize>,
+}
+
+fn chunk_rebuilder(
+	mut commands: Commands,
+	mut queue: ResMut<ChunkRebuildQueue>,
+	mut chunks: ResMut<PhosChunkRegistry>,
+	atlas: Res<ChunkAtlas>,
+	heightmap: Res<Map>,
+	tile_assets: Res<Assets<TileAsset>>,
+	tile_mappers: Res<Assets<TileMapperAsset>>,
+	mut meshes: ResMut<Assets<Mesh>>,
+	biome_painters: Res<Assets<BiomePainterAsset>>,
+	painter: Res<CurrentBiomePainter>,
+) {
+	for chunk_index in &queue.queue {
+		let chunk = chunks.chunks[*chunk_index];
+		commands.entity(chunk).despawn();
+	}
+
+	let b_painter = biome_painters.get(painter.handle.clone());
+
+	let cur_painter = b_painter.unwrap();
+
+	let chunk_meshes: Vec<_> = queue
+		.queue
+		.par_iter()
+		.map(|idx| {
+			let chunk = &heightmap.chunks[*idx];
+			let mesh = generate_chunk_mesh(chunk, &heightmap, cur_painter, &tile_assets, &tile_mappers);
+			let collision = generate_chunk_collider(chunk, &heightmap);
+			return (
+				mesh,
+				collision,
+				offset_to_world(chunk.chunk_offset * Chunk::SIZE as i32, 0.),
+				hex_utils::offset_to_index(chunk.chunk_offset, heightmap.width),
+			);
+		})
+		.collect();
+
+	for (mesh, (col_verts, col_indicies), pos, index) in chunk_meshes {
+		let chunk = commands.spawn((
+			MaterialMeshBundle {
+				mesh: meshes.add(mesh),
+				material: atlas.chunk_material_handle.clone(),
+				transform: Transform::from_translation(pos),
+				..default()
+			},
+			PhosChunk::new(index),
+			RenderDistanceVisibility::default().with_offset(Vec3::new(
+				(Chunk::SIZE / 2) as f32 * SHORT_DIAGONAL,
+				0.,
+				(Chunk::SIZE / 2) as f32 * 1.5,
+			)),
+			Collider::trimesh_with_flags(col_verts, col_indicies, TriMeshFlags::MERGE_DUPLICATE_VERTICES),
+		));
+		chunks.chunks[index] = chunk.id();
+	}
+	queue.queue.clear();
+}