Access to LODGroup data in script

Hi,

I've been needing to access the data in LOD groups which I can set and assign in the editor.

The reason for this is, I need to be able to combine objects together using a script to reduce draw calls, separating submeshes according to material and, now, LOD. This way the combined mesh also has the ability to render at different LODs.

Many thanks,

Steve

 

You actually can access it through SerializedObject :

SerializedObject obj = new SerializedObject(ToLOD.GetComponent<LODGroup>());
Debug.LogError(obj.FindProperty("m_LODs.Array.data[0].renderers").arraySize);

But it's a little bit complicated

 

Thank you.

May you elaborate a bit more on this? What properties are there to access through FindProperty(), or in other words, what strings can I put in there that will work? The documentation doesn't elaborate on what members it has.

What kind of access do I have? Can I read and write, or just read? I need to be able to create LODGroups entirely through a script.

Edit: Crap. It looks like SerializedObject is an Editor class, and I cannot use it in game or else it won't compile...

 

Sample with my auto lod calculator

 

1. How did you find the LODGroup component properties?

2. I was able to get all the way to the following line..

but this assignment does not actually happen to the prefab. I attached my script.

Code (csharp):

1. List<Transform> allLods = new List<Transform>();
2. ..Adds to the list of allLods..
3.  
4. //Applying to Lod meshes to LODGroup components
5. LODGroup prefabLodCmp = prefabObj.GetComponent<LODGroup>();
6. if (prefabLodCmp != null){
7.     SerializedObject obj = new SerializedObject(prefabLodCmp);
8.     for (int i = 0; i < prefabLodCmp.lodCount; i++){
9.         SerializedProperty prop = obj.FindProperty("m_LODs.Array.data[" + i.ToString() + "].renderers");
10.         prop.arraySize = 1;
11.         SerializedProperty propRenderer = prop.GetArrayElementAtIndex(0).FindPropertyRelative("renderer");
12.  
13.         propRenderer.objectReferenceValue = allLods[i].gameObject;
14.     }
15. }

 

Found my answer. While the above code is correct, Unity always returns a COPY of the array reference, rather than the reference itself. This means the modified properties have to be applied back to the prefab in order for the modifications to take effect.

Add the following line to the end:

Code (csharp):

1.  
2.  obj.ApplyModifiedProperties();
3.  

 

can i have access the others properties in the lodgroup by this way ?
i'll really like to delete lod's level but lodcount is read only and i don't know how to find the good name with FindProperty. also i'll like to change the percentage of the display distance ...
everyting is possible through the inspector but maybe someone here knows how to do with the code.

 

it works with that ...
SerializedProperty prop2 = obj.FindProperty("m_LODs");
prop2.DeleteArrayElementAtIndex(1);
and
SerializedProperty lods = obj.FindProperty("m_LODs.Array.data[0].screenRelativeHeight");
for the display distance

 

thanks!