riversong code showcase

Source/Riversong/Game/WorldGen/Operations/TerrainGeneratorOperation.cs

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+using System.Collections.Generic;
+using Cysharp.Threading.Tasks;
+using Unity.Mathematics;
+using UnityEngine;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class TerrainGeneratorOperation : IWorldGeneratorOperation
+    {
+        [InjectService]
+        private GameConfig _config;
+
+        [InjectService]
+        private IScene _scene;
+
+        [InjectService]
+        private WorldRenderingState _renderingState;
+
+        public async UniTask Execute(World world)
+        {
+            var generators = new List<ChunkMeshGenerator>
+            {
+                new TerrainChunkMeshGenerator(world, _config),
+                new GrassChunkMeshGenerator(world, _config),
+                new CropsChunkMeshGenerator(world, _config)
+            };
+
+            var chunkSize = _config.WorldGen.ChunkSize;
+            var horizontalResolution = Mathf.CeilToInt((float)world.Size.x / chunkSize);
+            var verticalResolution = Mathf.CeilToInt((float)world.Size.y / chunkSize);
+
+            for (var x = 0; x < horizontalResolution; x++)
+            for (var y = 0; y < verticalResolution; y++)
+            {
+                var chunk = CreateChunk(x, y);
+
+                foreach (var generator in generators) generator.InitializeChunk(chunk);
+
+                _renderingState.AddTerrainChunk(chunk);
+            }
+
+            await UniTask.NextFrame();
+
+            var batch = new List<TerrainChunk>(_config.WorldGen.ChunkGenerationBatchCount);
+            var count = 0;
+
+            while (count < _renderingState.TerrainChunks.Count)
+            {
+                batch.Clear();
+                for (var i = 0; i < _config.WorldGen.ChunkGenerationBatchCount; i++)
+                {
+                    batch.Add(_renderingState.TerrainChunks[count]);
+                    if (++count >= _renderingState.TerrainChunks.Count) break;
+                }
+
+                foreach (var generator in generators) generator.BeginGeneratingChunks(batch);
+
+                foreach (var generator in generators) await generator.Wait();
+
+                foreach (var generator in generators)
+                {
+                    generator.EndGeneratingChunks();
+                    await UniTask.NextFrame();
+                }
+            }
+        }
+
+        private TerrainChunk CreateChunk(int x, int y)
+        {
+            var chunk = new TerrainChunk
+            {
+                Coords = new int2(x, y),
+                Root = new GameObject($"Chunk_{x}_{y}")
+            };
+
+            chunk.Root.transform.SetParent(_scene.SceneFolders.TerrainChunks);
+            chunk.GrassLODs = new TerrainChunk.RenderData[_config.Terrain.GrassLODs.Length];
+            chunk.CropsLODs = new TerrainChunk.RenderData[_config.Terrain.CropsLODs.Length];
+
+            return chunk;
+        }
+    }
+}