/// <summary>
/// Callback when new prefab instances gets created or updated in Unity scene.
/// The plugin does not support creating prefab of HDAs directly
/// so this notifies user and provides a way to clean up the created prefab.
/// </summary>
/// <param name="instance">New prefab instance that was created</param>
static void OnPrefabInstanceUpdate(GameObject instance)
{
#if UNITY_EDITOR && HOUDINIENGINEUNITY_ENABLED && UNITY_2017_1_OR_NEWER
var heu_root = instance.GetComponent<HEU_HoudiniAssetRoot>();
if (heu_root != null && heu_root._houdiniAsset != null &&
(HEU_EditorUtility.IsPrefabInstance(instance) || HEU_EditorUtility.IsPrefabAsset(instance)) &&
!heu_root._houdiniAsset.WarnedPrefabNotSupported)
{
string prefabPath = HEU_EditorUtility.GetPrefabAssetPath(instance);
string title = HEU_Defines.HEU_PRODUCT_NAME + " Prefabs Not Supported";
string message =
"Creating prefab of an HDA is not supported by HoudniEngine.\n\n" +
"It is recommended to select 'Remove Prefab' to destroy new prefab " +
"and revert to original asset.\n\n" +
"Prefab: " + prefabPath;
heu_root._houdiniAsset.WarnedPrefabNotSupported = true;
if (HEU_EditorUtility.DisplayDialog(title, message, "Remove Prefab & Revert", "Keep Prefab"))
{
HEU_EditorUtility.DisconnectPrefabInstance(instance);
HEU_AssetDatabase.DeleteAssetAtPath(prefabPath);
}
}
#endif
}