private static void AddNormal(StringBuilder sb, I3DVector vec)
{
sb.AppendFormat(CultureInfo.InvariantCulture, "vn {0:F4} {1:F4} {2:F4}\n", vec.X, vec.Y, vec.Z);
}
private void AddVertex(StringBuilder sb, I3DVector vec)
{
sb.AppendFormat(CultureInfo.InvariantCulture, "v {0:G} {1:G} {2:G}\n", vec.X * Scale, vec.Y * Scale, vec.Z * Scale);
}
