Inheritance: GlTF_Writer
	public GlTF_MaterialColor (string n, Color c) { name = n; color = new GlTF_ColorRGBA(name,c); }
 public GlTF_MaterialColor(string n, Color c)
 {
     name = n; color = new GlTF_ColorRGBA(name, c);
 }
    // XXX: remove?
    // public GlTF_MaterialColor(GlTF_Globals globals) : base(globals) {
    //   color = new GlTF_ColorRGBA(globals, "diffuse");
    // }

    public GlTF_MaterialColor(GlTF_Globals globals, string n, Color c) : base(globals)
    {
        name  = n;
        color = new GlTF_ColorRGBA(globals, name, c);
    }