public static extern RTresult rtuTraversalCreate(ref RTUtraversal traversal,
RTUquerytype query_type,
RTUrayformat ray_format,
RTUtriformat tri_format,
uint outputs,
uint options,
RTcontext context);
public static extern RTresult rtuTraversalGetAccelData(RTUtraversal traversal, IntPtr data);
public static extern RTresult rtuTraversalGetAccelDataSize(RTUtraversal traversal, ref uint data_size);
public static extern RTresult rtuTraversalPreprocess(RTUtraversal traversal);
public static extern RTresult rtuTraversalDestroy(RTUtraversal traversal);
public static extern RTresult rtuTraversalSetOption(RTUtraversal traversal, RunTimeOptions option, IntPtr value);
public static extern RTresult rtuTraversalGetErrorString(RTUtraversal traversal, RTresult code, [MarshalAs(UnmanagedType.LPStr)] out string return_string);
public static extern RTresult rtuTraversalUnmapOutput(RTUtraversal traversal, RTUoutput which);
public static extern RTresult rtuTraversalMapOutput(RTUtraversal traversal, RTUoutput which, ref IntPtr output);
public static extern RTresult rtuTraversalUnmapResults(RTUtraversal traversal);
public static extern RTresult rtuTraversalMapResults(RTUtraversal traversal, ref IntPtr results);
public static extern RTresult rtuTraversalTraverse(RTUtraversal traversal);
public static extern RTresult rtuTraversalMapRays(RTUtraversal traversal, uint num_rays, ref IntPtr rays);
public static extern RTresult rtuTraversalSetMesh(RTUtraversal traversal,
uint num_verts,
IntPtr verts,
uint num_tris,
IntPtr indices);