Using Null in MeshVertexCount not working for me

Scripting
1

In Rhino 5, imported a set of meshes from DAZ3D
They render with the vertex color
I check and uncheck that box in appearances, no affect
I ran the sample Rhino.MeshVertexCount
and it does make them random colors
I would like to remove them (vertex colors) so it will shade correctly
When I use Null in the function, MeshVertexCount,
Rhino.MeshVertexColors strObject, myNull
it says ‘error, array required’
I tried making a myNull by cancelling a call and setting to set a variable to Null, still no luck
Any ideas?

2

Hi @mwe4ol,

This simple RhinoScript should clear any mesh vertex colors:

Sub RemoveMeshVertexColors
  Dim strMesh
  strMesh = Rhino.GetObject("Select mesh", 32)
  If Not IsNull(strMesh) Then
    Call Rhino.MeshVertexColors(strMesh, Null)
  End If
End Sub

– Dale

3

Thanks, that runs and works fine, sort of
Strange, but I think that is what I was doing
I cut and pasted the example from the help section, and typed Null where the array of colors was, and when I tried to run it, it said array required
And the first time I run yours, it work, then it gives me the same error (array required) on the same object as it worked on

Now, maybe a new / separate issue, but seems related
The meshes look black in a ‘rendered’ view, with default lighting
with no lighting they are the material color I give them, but flat of course

4

Also, I am running this by dragging and dropping on the Rhino window, maybe I should make a button for it?

5

Other, non imported meshes, screen render fine

6

solved, more or less
Rhino doesn’t like the mesh normals that came with the imported mesh
the rebuild normals fixed it