voxel grid generator

JontePonte

Jul 4th, 2025

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using System.Collections.Generic;
using UnityEngine;
using Unity.Jobs;
using Unity.Collections;
using Unity.Mathematics;
using Unity.Entities;
using Voxels;
using TerrainGeneration.TerrainMasks;
using Unity.VisualScripting;
using System;
using UnityEditor.PackageManager;
namespace TerrainGeneration
{
public static class VoxelGridGenerator
{
private static BlobAssetReference<TerrainMaskList> terrainMaskList;
/// <summary>
/// Generates a voxel grid based on masks2D and masks3D
/// </summary>
public static NativeVoxelGrid GenerateGrid(Vector3Int gridSize, Vector3Int position, float surfaceLevel, int stepSize)
{
NativeVoxelGrid voxelGrid = new(gridSize.x, gridSize.y, gridSize.z, Allocator.TempJob);
if (!terrainMaskList.IsCreated) throw new ArgumentException("TerrainMaskList has not been created. You should call GenerateJobTerrainMasks() before GenerateGrid().");
VoxelGridJob voxelGridJob = new()
{
voxelGrid = voxelGrid,
terrainMasks = terrainMaskList,
positionOffset = new float3(position.x, position.y, position.z),
gridSize = new int3(gridSize.x, gridSize.y, gridSize.z),
surfaceLevel = surfaceLevel,
stepSize = stepSize
};
JobHandle handle = voxelGridJob.Schedule(gridSize.x * gridSize.z, 16);
handle.Complete();
return voxelGrid;
}
/// <summary>
/// The masks modified to work in jobs
/// </summary>
public static void GenerateJobTerrainMasks(List<TerrainMask2D> masks2D, List<TerrainMask3D> masks3D)
{
var builder = new BlobBuilder(Allocator.Persistent);
ref TerrainMaskList terrainMaskListRoot = ref builder.ConstructRoot<TerrainMaskList>();
int count = masks2D.Count + masks3D.Count;
BlobBuilderArray<JobTerrainMask> arrayBuilder = builder.Allocate(
ref terrainMaskListRoot.terrainMasks,
count
);
// Fill 2D masks
for (int i = 0; i < masks2D.Count; i++)
{
masks2D[i].ToJobMask(ref arrayBuilder[i], ref builder);
}
// Fill 3D masks
for (int i = 0; i < masks3D.Count; i++)
{
masks3D[i].ToJobMask(ref arrayBuilder[i + masks2D.Count], ref builder);
}
var result = builder.CreateBlobAssetReference<TerrainMaskList>(Allocator.Persistent);
builder.Dispose();
terrainMaskList = result;
}
public static void Dispose()
{
if (terrainMaskList.IsCreated) terrainMaskList.Dispose();
}
}
}

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