Making a custom mesh asset readable at runtime

Im generating a mesh asset in the editor, which data i then access in the script. It works fine inside the editor, but after the build the mesh asset is marked as non readable, and as a result its failing to read any data from it in the script. There is a settable isReadable property in ModelImporter class, but my mesh asset is not a model, its just a mesh, therefore it doesnt work. These are all the settings i have available in there:



Did anyone encounter similar problem? How do i make it readable at runtime as well?

 

Alright, figured it out. You need to use the Force Text serialization mode, then you can just edit the asset file as a text file and change the m_IsReadable: 0 to 1. E.g:

Code (CSharp):

1. ...Save asset...
2. string filePath = Path.Combine(Directory.GetCurrentDirectory(), assetPath);
3. filePath = filePath.Replace("/", "\\");
4. string fileText = File.ReadAllText(filePath);
5. fileText = fileText.Replace("m_IsReadable: 0", "m_IsReadable: 1");
6. File.WriteAllText(filePath, fileText);
7. AssetDatabase.Refresh();

If youre using mixed or binary serialization modes, then you could probably do the same but by using reflection instead.

 

The real question is: Why can't the Unity Editor edit .asset files with the importer (same as other formats)

 

yes highly frustrating

 

Just use VSCode to edit this

 

Use it carefully as it ruins the asset sometimes

 

It cant ruin anything if done correctly.

 

You're right, I thought it was responsible for messing up my materials, days later I found out that another script did it but forgot I posted this reply.

 

A better way to do this is to use SerializedObject:

Code (CSharp):

1. SerializedObject s = new SerializedObject(myMeshAsset);
2. s.FindProperty("m_IsReadable").boolValue = true;