/// <summary>
/// Combines meshes
/// </summary>
/// <param name="meshFilters"></param>
/// <param name="settings"></param>
/// <param name="debug"></param>
public static void Combine(IReadOnlyList <MeshFilter> meshFilters, CombineMeshSettings settings, bool debug = false)
{
if (meshFilters == null || meshFilters.Count < 1)
{
if (debug)
{
Debug.Log("No meshFilters found");
}
return;
}
var combine = new CombineInstance[meshFilters.Count];
var m = meshFilters[0];
var t = m.transform;
var mainMatrix = t.localToWorldMatrix;
combine[0].mesh = m.sharedMesh;
combine[0].transform = Matrix4x4.identity;
for (var i = 1; i < meshFilters.Count; i++)
{
combine[i].mesh = meshFilters[i].sharedMesh;
combine[i].transform = meshFilters[i].transform.LocalToLocalMatrix(mainMatrix);
Object.Destroy(meshFilters[i].gameObject);
}
m.mesh = new Mesh();
m.mesh.CombineMeshes(combine, settings.MergeSubMeshes, settings.UseMatrices);
}
/// <summary>
/// Combines meshes from specific renderers by main material
/// </summary>
/// <param name="renderers"></param>
/// <param name="settings"></param>
/// <param name="debug"></param>
public static void CombineGroup(Renderer[] renderers, CombineMeshSettings settings, bool debug = false)
{
if (renderers == null || renderers.Length < 1)
{
if (debug)
{
Debug.Log("No renderers found");
}
return;
}
if (debug)
{
Debug.Log($"Found {renderers.Length} renderers");
}
var uniqueMaterials = renderers.Select(x => x.sharedMaterial).Distinct();
var enumerable = uniqueMaterials as Material[] ?? uniqueMaterials.ToArray();
if (debug)
{
Debug.Log($"Found {enumerable.Count()} unique materials");
}
var matMeshes = enumerable.Select(mat => renderers.Where(x => x.sharedMaterial == mat)
.Select(x => x.GetComponent <MeshFilter>())
.ToArray())
.ToList();
foreach (var meshFilters in matMeshes)
{
Combine(meshFilters.Where(mf => mf != null).ToArray(), settings, debug);
}
}
/// <summary>
/// Combines all meshes by unique main material for each LOD (if exists)
/// </summary>
/// <param name="root">Parent gameObject</param>
/// <param name="settings"></param>
/// <param name="debug"></param>
public static void CombineAll(GameObject root, CombineMeshSettings settings, bool debug = false)
{
var lodGroup = root.GetComponent <LODGroup>();
var gameObjects = new List <Renderer[]>();
if (lodGroup != null)
{
if (debug)
{
Debug.Log($"Found {lodGroup.lodCount} LODs, adding renderers for for separate combining");
}
gameObjects.AddRange(lodGroup.GetLODs()
.Select(loD => loD.renderers));
}
else
{
if (debug)
{
Debug.Log("No LODGroup found, adding all renderers");
}
gameObjects.Add(root.GetComponentsInChildren <Renderer>());
}
foreach (var meshRenderers in gameObjects)
{
var renderers = meshRenderers
.Where(r => r != null)
.Where(r => r.sharedMaterial != null)
.ToArray();
if (settings.SkipMultiMaterials)
{
var size = renderers.Length;
renderers = renderers.Where(r => r.sharedMaterials.Count() == 1).ToArray();
if (debug)
{
Debug.Log($"Excluding {size-renderers.Length} renderers with multiple materials");
}
}
CombineGroup(
renderers,
settings, debug);
}
}