internal IntPtr CacheHandle()
{
#if RHINO_SDK
if (IntPtr.Zero == m_ptr_cache_handle)
{
m_ptr_cache_handle = UnsafeNativeMethods.CRhinoCacheHandle_New();
}
#endif
// 10 Jan 2019 S. BAer (RH-50309)
// Use the shallow parent's cache handle if it exists. There
// is no need to create a new cache handle when the geometry
// is exactly the same
if (IntPtr.Zero == m_ptr_cache_handle && m_shallow_parent != null)
{
return(m_shallow_parent.CacheHandle());
}
return(m_ptr_cache_handle);
}
