[EditorGUI]Preview renderer

Hello,
have you ever used PreviewRenderUtility? I'm asking because I would like to render mesh in editor window in some defined Rect. But I cannot do that(dunno why, I don't see anything),. Can you give me advice/example how can I render that?

 

This is how I draw meshes to an editor window.

Code (CSharp):

1. private PreviewRenderUtility mPrevRender;
2.         private Mesh mPreviewMesh;
3.         private Material mMat;
4.  
5.         public void DrawRenderPreview(Rect r)
6.         {
7.             if (mPrevRender == null)
8.                 mPrevRender = new PreviewRenderUtility();
9.  
10.             if (mPreviewMesh == null)
11.             {
12.                 mPreviewMesh = Resources.Load("SquareTest", typeof(Mesh)) as Mesh;
13.                 mMat = Resources.Load("Materials/Box01Mat", typeof(Material)) as Material;
14.             }
15.  
16.             mPrevRender.m_Camera.transform.position = (Vector3)(-Vector3.forward * 8f);
17.             mPrevRender.m_Camera.transform.rotation = Quaternion.identity;
18.             mPrevRender.m_Camera.farClipPlane = 30;
19.  
20.             mPrevRender.m_Light[0].intensity = 0.5f;
21.             mPrevRender.m_Light[0].transform.rotation = Quaternion.Euler(30f, 30f, 0f);
22.             mPrevRender.m_Light[1].intensity = 0.5f;
23.  
24.             mPrevRender.BeginPreview(r, GUIStyle.none);
25.             mPrevRender.DrawMesh(mPreviewMesh, -Vector3.up * 0.5f, Quaternion.Euler(-30f, 0f, 0f) * Quaternion.Euler(0f, 60, 0f), mMat, 0);
26.  
27.             bool fog = RenderSettings.fog;
28.             Unsupported.SetRenderSettingsUseFogNoDirty(false);
29.             mPrevRender.m_Camera.Render();
30.             Unsupported.SetRenderSettingsUseFogNoDirty(fog);
31.             Texture texture = mPrevRender.EndPreview();
32.  
33.             GUI.DrawTexture(r, texture);
34.         }

 

Thanks

 

This post is old, but I can't find the documentation on PreviewRenderUtility class. Any idea where to find it?

 

You can get some very good uses from here: http://anchan828.github.io/editor-manual/web/customeditor.html

Look at section 9.8
but it's in japaneese, so use google translate

and also here http://anchan828.github.io/editor-manual/web/spriteanimationpreview2.html

 

2021. Still undocumented. Everytime i come back to this class i need to scour for resources.
So i'm opening a Github repo with documentation for anyone who comes across this in the future:

https://github.com/CyberFoxHax/Unity3D_PreviewRenderUtility_Documentation/wiki/PreviewRenderUtility