/// <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>
private 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);
// Doesn't actually refresh properly, but should be fixed in 2021.2 and 2022.1
HEU_AssetDatabase.SaveAndRefreshDatabase();
}
}
#endif
}
public static Texture2D ExtractHoudiniImageToTextureFile(HEU_SessionBase session, HAPI_MaterialInfo materialInfo, string imagePlanes, string assetCacheFolderPath)
{
Texture2D textureResult = null;
// Get the Textures folder in the assetCacheFolderPath. Make sure it exists.
assetCacheFolderPath = HEU_AssetDatabase.AppendTexturesPathToAssetFolder(assetCacheFolderPath);
HEU_AssetDatabase.CreatePathWithFolders(assetCacheFolderPath);
// Need to pass in full path to Houdini to write out the file
assetCacheFolderPath = HEU_AssetDatabase.GetAssetFullPath(assetCacheFolderPath);
if (assetCacheFolderPath == null)
{
return textureResult;
}
HAPI_ImageInfo imageInfo = new HAPI_ImageInfo();
if (!session.GetImageInfo(materialInfo.nodeId, ref imageInfo))
{
return textureResult;
}
// This will return null if the current imageInfo file format is supported by Unity, otherwise
// returns a Unity supported file format.
string desiredFileFormatName = HEU_MaterialData.GetSupportedFileFormat(session, ref imageInfo);
// Extract image to file
string writtenFilePath = null;
if (!session.ExtractImageToFile(materialInfo.nodeId, desiredFileFormatName, imagePlanes, assetCacheFolderPath, out writtenFilePath))
{
return textureResult;
}
HEU_AssetDatabase.SaveAndRefreshDatabase();
// Convert full path back to relative in order to work with AssetDatabase
string assetRelativePath = HEU_AssetDatabase.GetAssetRelativePath(writtenFilePath);
// Re-import to refresh the project
HEU_AssetDatabase.ImportAsset(assetRelativePath, HEU_AssetDatabase.HEU_ImportAssetOptions.Default);
textureResult = HEU_AssetDatabase.LoadAssetAtPath(assetRelativePath, typeof(Texture2D)) as Texture2D;
//Debug.LogFormat("Loaded texture to file {0} with format {1}", writtenFilePath, textureResult != null ? textureResult.format.ToString() : "none");
return textureResult;
}
