koobas.hobune.stream
Select Shader in Custom Editor GUI
I would like to have a shader selection drop-down (similar to that found in the material inspector) to allow users to select the shader that they would like to use with batch-generated materials.
selectedShader = ???.ShaderField(selectedShader);
If there is no way to reuse the material inspector field, how can this be reproduced?
I finally managed to figure out a definitive solution, which works for me, running Unity 4.2:
MenuCommand mc;
private void DisplayShaderContext(Rect r) {
if( mc == null )
mc = new MenuCommand( this, 0 );
// Create dummy material to make it not highlight any shaders inside:
string tmpStr = "Shader \"Hidden/tmp_shdr\"{SubShader{Pass{}}}";
Material temp = new Material( tmpStr );
// Rebuild shader menu:
UnityEditorInternal.InternalEditorUtility.SetupShaderMenu( temp );
// Destroy temporary shader and material:
DestroyImmediate( temp.shader, true );
DestroyImmediate( temp, true );
// Display shader popup:
EditorUtility.DisplayPopupMenu( r, "CONTEXT/ShaderPopup", mc );
}
private void OnSelectedShaderPopup( string command, Shader shader ) {
if( shader != null ) {
Debug.Log("Clicked shader: " + shader.name);
}
}
The other methods didn't work for me, they didn't show all shaders, but this one did :)
Thanks, works great. I struggled a bit to understand how to use it, but it simply works by calling something like :
if (GUILayout.Button("Change shader"))
{
DisplayShaderContext(GUILayoutUtility.GetRect(GUIContent.none,EditorStyles.popup));
}
I'm not sure I understand how unity end up calling OnSelectedShaderPopup, but it gets called on picking from the list all right.
Well, Unity probably uses Send$$anonymous$$essage / Reflection like most the time. It's quite inefficient to create and destroy a material (and shader) each call. It's better to create it in OnEnable and destroy it in OnDisable.
@khan-amil: OnSelectedShaderPopup is a callback method to the object passed to $$anonymous$$enuCommand: mc = new $$anonymous$$enuCommand(myEditorClass, 0);
C#
ShaderToImport = EditorGUILayout.ObjectField(ShaderToImport, typeof(Shader), true) as Shader;
Nice idea, though unfortunately this doesn't allow one to select from the built-in shaders. Do you know if there is a way to get a list of all available shaders? Perhaps such a list could be used to produce a similar but custom control. Thanks
I think that I have finally found my answer:
// Create and cache a dummy material
if (_dummyMaterial == null) {
_dummyMaterial = new Material(Shader.Find("Diffuse"));
_dummyMaterial.hideFlags = HideFlags.HideAndDontSave;
}
// First ensure that all shader assets are loaded
UnityEditorInternal.InternalEditorUtility.SetupShaderMenu(_dummyMaterial);
// Fetch all shader assets
Shader[] shaders = (Shader[])UnityEngine.Resources.FindObjectsOfTypeAll(typeof(Shader));
// Filter out those that are supposed to be hidden
shaders = shaders.Where(s => s != null && s.name != "" && !s.name.StartsWith("__")).ToArray();
This appears to be a better solution than my previous one because it works without having previously selected the shader popup menu for a material. Not perfect, but as good as I could figure out.
Hi Lea, how did you feed the Shader[] to your custom editor UI to show the selection drop down?
@Ian I have put an example together for you: http://pastebin.com/bbDhu0NX
this does not work anymore in Unity 4.2.1. It only lists a couple of the standard shaders but not all of them. Any ideas why and how to solve it?
Maybe you would like to have a look at String-O-Matic. You can have a nice list of available shaders as a dropdown in the inspector. You would still need to call Shader.Find, but at least you know the shader in question exists.
