public IEnumerator Batch(GameObject go)
{
var renderers = go.GetComponentsInChildren <Renderer>();
var materials = new HashSet <Material>(renderers.SelectMany(r => r.sharedMaterials));
//foreach (var material in materials) { Debug.Log(material); }
var textures = new HashSet <Texture2D>(materials.Select(m =>
{
if (m)
{
return(m.mainTexture as Texture2D);
}
return(null);
}).Where(t => t != null)).ToList();
textures.Add(whiteTexture);
TextureAtlas atlas = null;
yield return(TextureAtlasModule.instance.GetTextureAtlas(textures.ToArray(), a => atlas = a));
var atlasLookup = new Dictionary <Texture2D, Rect>();
var atlasTextures = atlas.textures;
for (int i = 0; i < atlasTextures.Length; i++)
{
atlasLookup[atlasTextures[i]] = atlas.uvs[i];
}
MeshFilter[] meshFilters = go.GetComponentsInChildren <MeshFilter>();
var combine = new List <CombineInstance>();
for (int i = 0; i < meshFilters.Length; i++)
{
var mf = meshFilters[i];
var sharedMesh = mf.sharedMesh;
if (!sharedMesh)
{
continue;
}
if (!sharedMesh.isReadable)
{
var assetPath = AssetDatabase.GetAssetPath(sharedMesh);
if (!string.IsNullOrEmpty(assetPath))
{
var importer = AssetImporter.GetAtPath(assetPath) as ModelImporter;
if (importer)
{
importer.isReadable = true;
importer.SaveAndReimport();
}
}
}
var ci = new CombineInstance();
var mesh = Object.Instantiate(sharedMesh);
var mr = mf.GetComponent <MeshRenderer>();
var sharedMaterials = mr.sharedMaterials;
var uv = mesh.uv;
var colors = mesh.colors;
if (colors == null || colors.Length == 0)
{
colors = new Color[uv.Length];
}
var updated = new bool[uv.Length];
var triangles = new List <int>();
// Some meshes have submeshes that either aren't expected to render or are missing a material, so go ahead and skip
var subMeshCount = Mathf.Min(mesh.subMeshCount, sharedMaterials.Length);
for (int j = 0; j < subMeshCount; j++)
{
var sharedMaterial = sharedMaterials[Mathf.Min(j, sharedMaterials.Length - 1)];
var mainTexture = whiteTexture;
var materialColor = Color.white;
if (sharedMaterial)
{
var texture = sharedMaterial.mainTexture as Texture2D;
if (texture)
{
mainTexture = texture;
}
if (sharedMaterial.HasProperty("_Color"))
{
materialColor = sharedMaterial.color;
}
}
if (mesh.GetTopology(j) != MeshTopology.Triangles)
{
Debug.LogWarning("Mesh must have triangles", mf);
continue;
}
triangles.Clear();
mesh.GetTriangles(triangles, j);
var uvOffset = atlasLookup[mainTexture];
foreach (var t in triangles)
{
if (!updated[t])
{
var uvCoord = uv[t];
if (mainTexture == whiteTexture)
{
// Sample at center of white texture to avoid sampling edge colors incorrectly
uvCoord.x = 0.5f;
uvCoord.y = 0.5f;
}
uvCoord.x = Mathf.Lerp(uvOffset.xMin, uvOffset.xMax, uvCoord.x);
uvCoord.y = Mathf.Lerp(uvOffset.yMin, uvOffset.yMax, uvCoord.y);
uv[t] = uvCoord;
if (mainTexture == whiteTexture)
{
colors[t] = materialColor;
}
else
{
colors[t] = Color.white;
}
updated[t] = true;
}
}
yield return(null);
}
mesh.uv = uv;
mesh.uv2 = null;
mesh.colors = colors;
ci.mesh = mesh;
ci.transform = mf.transform.localToWorldMatrix;
combine.Add(ci);
mf.gameObject.SetActive(false);
yield return(null);
}
var combinedMesh = new Mesh();
#if UNITY_2017_3_OR_NEWER
combinedMesh.indexFormat = IndexFormat.UInt32;
#endif
combinedMesh.CombineMeshes(combine.ToArray(), true, true);
combinedMesh.RecalculateBounds();
var meshFilter = go.AddComponent <MeshFilter>();
meshFilter.sharedMesh = combinedMesh;
for (int i = 0; i < meshFilters.Length; i++)
{
Object.DestroyImmediate(meshFilters[i].gameObject);
}
var meshRenderer = go.AddComponent <MeshRenderer>();
var material = new Material(Shader.Find("Custom/AutoLOD/SimpleBatcher"));
material.mainTexture = atlas.textureAtlas;
meshRenderer.sharedMaterial = material;
}
public IEnumerator GetTextureAtlas(Texture2D[] textures, Action <TextureAtlas> callback)
{
TextureAtlas atlas = null;
// Clear out any atlases that were removed
m_Atlases.RemoveAll(a => a == null);
yield return(null);
foreach (var a in m_Atlases)
{
// At a minimum the atlas should have all of the textures requested, but can be a superset
if (!textures.Except(a.textures).Any())
{
atlas = a;
break;
}
yield return(null);
}
if (!atlas)
{
atlas = ScriptableObject.CreateInstance <TextureAtlas>();
foreach (var t in textures)
{
var assetImporter = AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(t));
var textureImporter = assetImporter as TextureImporter;
if (textureImporter && !textureImporter.isReadable)
{
textureImporter.isReadable = true;
textureImporter.SaveAndReimport();
}
else if (!assetImporter)
{
// In-memory textures need to be saved to disk in order to be referenced by the texture atlas
SaveUniqueAtlasAsset(t);
}
yield return(null);
}
var textureAtlas = new Texture2D(0, 0, TextureFormat.RGB24, true, PlayerSettings.colorSpace == ColorSpace.Linear);
var uvs = textureAtlas.PackTextures(textures.ToArray(), 0, 1024, true);
if (uvs != null)
{
atlas.textureAtlas = textureAtlas;
atlas.uvs = uvs;
atlas.textures = textures;
SaveUniqueAtlasAsset(textureAtlas);
SaveUniqueAtlasAsset(atlas);
m_Atlases.Add(atlas);
}
yield return(null);
}
if (callback != null)
{
callback(atlas);
}
}