private IList <TransportNode> BuildNodesForCell(
TransportNetworkType transportNetworkType,
TransportCellKey cellKey
)
{
var cellKeyInterop = cellKey.ToInterop();
int nodeCount = NativeTransportApi_GetNodeCountForNetworkInCell(NativePluginRunner.API, transportNetworkType, cellKeyInterop);
if (nodeCount <= 0)
{
return(new List <TransportNode>());
}
// alloc and pin buffers
var nodeIdInteropBuffer = new TransportNodeIdInterop[nodeCount];
var nodeIdInteropBufferGCHandle = GCHandle.Alloc(nodeIdInteropBuffer, GCHandleType.Pinned);
var nodeIdInteropBufferPtr = nodeIdInteropBufferGCHandle.AddrOfPinnedObject();
// populate buffers from C++ api
var nodeSuccess = NativeTransportApi_TryGetNodeIdsForNetworkInCell(NativePluginRunner.API, transportNetworkType, cellKeyInterop, nodeCount, nodeIdInteropBufferPtr);
if (!nodeSuccess)
{
throw new System.ArgumentOutOfRangeException("incorrect buffer size passed for node ids");
}
var nodes = FetchNodes(nodeIdInteropBuffer);
// free buffers
nodeIdInteropBufferGCHandle.Free();
return(nodes);
}
private bool TryFetchNode(TransportNodeIdInterop nodeIdInterop, out TransportNode node)
{
int incidentDirectedEdgeCount = NativeTransportApi_GetIncidentDirectedEdgeCountForNode(NativePluginRunner.API, nodeIdInterop);
if (incidentDirectedEdgeCount < 0)
{
node = TransportNode.MakeEmpty();
return(false);
}
var incidentDirectedEdgeIdInteropBuffer = new TransportDirectedEdgeIdInterop[incidentDirectedEdgeCount];
var incidentDirectedEdgeIdInteropBufferGCHandle = GCHandle.Alloc(incidentDirectedEdgeIdInteropBuffer, GCHandleType.Pinned);
var incidentDirectedEdgeIdInteropPtr = incidentDirectedEdgeIdInteropBufferGCHandle.AddrOfPinnedObject();
var nodeInterop = new TransportNodeInterop()
{
Id = nodeIdInterop,
IncidentDirectedEdgeIdsSize = incidentDirectedEdgeCount,
IncidentDirectedEdgeIds = incidentDirectedEdgeIdInteropPtr
};
bool success = NativeTransportApi_TryGetNode(NativePluginRunner.API, ref nodeInterop);
if (!success)
{
node = TransportNode.MakeEmpty();
return(false);
}
var incidedDirectedEdgeIds = incidentDirectedEdgeIdInteropBuffer.Select(_x => _x.FromInterop()).ToList();
node = new TransportNode(
nodeInterop.Id.FromInterop(),
nodeInterop.Point,
incidedDirectedEdgeIds
);
incidentDirectedEdgeIdInteropBufferGCHandle.Free();
return(true);
}
private IList <TransportNodeIdInterop> FetchNodeIdsForNetworkInCell(TransportNetworkType transportNetwork, MortonKeyInterop cellKeyInterop)
{
int nodeCount = NativeTransportApi_GetNodeCountForNetworkInCell(NativePluginRunner.API, transportNetwork, cellKeyInterop);
if (nodeCount <= 0)
{
return(new List <TransportNodeIdInterop>());
}
var nodeIdInteropBuffer = new TransportNodeIdInterop[nodeCount];
var nodeIdInteropBufferGCHandle = GCHandle.Alloc(nodeIdInteropBuffer, GCHandleType.Pinned);
var nodeIdInteropBufferPtr = nodeIdInteropBufferGCHandle.AddrOfPinnedObject();
if (!NativeTransportApi_TryGetNodeIdsForNetworkInCell(NativePluginRunner.API, transportNetwork, cellKeyInterop, nodeCount, nodeIdInteropBufferPtr))
{
throw new System.ArgumentOutOfRangeException("incorrect buffer size passed for node ids");
}
nodeIdInteropBufferGCHandle.Free();
return(nodeIdInteropBuffer);
}
private static extern int NativeTransportApi_GetIncidentDirectedEdgeCountForNode(IntPtr ptr, TransportNodeIdInterop nodeIdInterop);
