internal static void TryCacheMesh(ProBuilderMesh pb)
{
Mesh mesh = pb.mesh;
// check for an existing mesh in the mesh cache and update or create a new one so
// as not to clutter the scene yaml.
string meshAssetPath = AssetDatabase.GetAssetPath(mesh);
// if mesh is already an asset any changes will already have been applied since
// pb_Object is directly modifying the mesh asset
if (string.IsNullOrEmpty(meshAssetPath))
{
// at the moment the asset_guid is only used to name the mesh something unique
string guid = pb.assetGuid;
if (string.IsNullOrEmpty(guid))
{
guid = Guid.NewGuid().ToString("N");
pb.assetGuid = guid;
}
string meshCacheDirectory = GetMeshCacheDirectory(true);
string path = string.Format("{0}/{1}.asset", meshCacheDirectory, guid);
Mesh m = AssetDatabase.LoadAssetAtPath <Mesh>(path);
// a mesh already exists in the cache for this pb_Object
if (m != null)
{
if (mesh != m)
{
// prefab instances should always point to the same mesh
if (EditorUtility.IsPrefabInstance(pb.gameObject) || EditorUtility.IsPrefabAsset(pb.gameObject))
{
// Debug.Log("reconnect prefab to mesh");
// use the most recent mesh iteration (when undoing for example)
UnityEngine.ProBuilder.MeshUtility.CopyTo(mesh, m);
UnityEngine.Object.DestroyImmediate(mesh);
pb.gameObject.GetComponent <MeshFilter>().sharedMesh = m;
// also set the MeshCollider if it exists
MeshCollider mc = pb.gameObject.GetComponent <MeshCollider>();
if (mc != null)
{
mc.sharedMesh = m;
}
return;
}
else
{
// duplicate mesh
// Debug.Log("create new mesh in cache from disconnect");
pb.assetGuid = Guid.NewGuid().ToString("N");
path = string.Format("{0}/{1}.asset", meshCacheDirectory, pb.assetGuid);
}
}
else
{
Debug.LogWarning("Mesh found in cache and scene mesh references match, but pb.asset_guid doesn't point to asset. Please report the circumstances leading to this event to Karl.");
}
}
AssetDatabase.CreateAsset(mesh, path);
}
}