// Functions
protected override void Awake()
{
base.Awake();
// Cache references to required component
UnderstandingDLL = new SpatialUnderstandingDll();
UnderstandingSourceMesh = GetComponent <SpatialUnderstandingSourceMesh>();
UnderstandingCustomMesh = GetComponent <SpatialUnderstandingCustomMesh>();
}
/// <summary>
/// Update the internal mesh list and provides an array pointer in
/// the form the DLL will accept.
/// </summary>
/// <param name="meshCount">Number of meshes contains in the return mesh list</param>
/// <param name="meshList">Marshalled mesh list pointer. Valid only with the caller's function context</param>
/// <returns></returns>
public bool GetInputMeshList(out int meshCount, out IntPtr meshList)
{
if (inputMeshList.Count == 0)
{
meshCount = 0;
meshList = IntPtr.Zero;
return(false);
}
// Convert to IntPtr
SpatialUnderstandingDll dll = SpatialUnderstanding.Instance.UnderstandingDLL;
meshCount = inputMeshList.Count;
meshList = dll.PinMeshDataForMarshalling(inputMeshList);
return(true);
}
/// <summary>
/// Imports the custom mesh from the DLL. This a a coroutine which will take multiple frames to complete.
/// </summary>
/// <returns></returns>
public IEnumerator Import_UnderstandingMesh()
{
var stopwatch = System.Diagnostics.Stopwatch.StartNew();
int startFrameCount = Time.frameCount;
if (!spatialUnderstanding.AllowSpatialUnderstanding || IsImportActive)
{
yield break;
}
IsImportActive = true;
SpatialUnderstandingDll dll = spatialUnderstanding.UnderstandingDLL;
Vector3[] meshVertices = null;
Vector3[] meshNormals = null;
Int32[] meshIndices = null;
// Pull the mesh - first get the size, then allocate and pull the data
int vertCount;
int idxCount;
if ((SpatialUnderstandingDll.Imports.GeneratePlayspace_ExtractMesh_Setup(out vertCount, out idxCount) > 0) &&
(vertCount > 0) &&
(idxCount > 0))
{
meshVertices = new Vector3[vertCount];
IntPtr vertPos = dll.PinObject(meshVertices);
meshNormals = new Vector3[vertCount];
IntPtr vertNorm = dll.PinObject(meshNormals);
meshIndices = new Int32[idxCount];
IntPtr indices = dll.PinObject(meshIndices);
SpatialUnderstandingDll.Imports.GeneratePlayspace_ExtractMesh_Extract(vertCount, vertPos, vertNorm, idxCount, indices);
}
// Wait a frame
stopwatch.Stop();
yield return(null);
stopwatch.Start();
// Create output meshes
if ((meshVertices != null) &&
(meshVertices.Length > 0) &&
(meshIndices != null) &&
(meshIndices.Length > 0))
{
// first get all our mesh data containers ready for meshes.
foreach (MeshData meshdata in meshSectors.Values)
{
meshdata.Reset();
}
float startTime = Time.realtimeSinceStartup;
// first we need to split the playspace up into segments so we don't always
// draw everything. We can break things up in to cubic meters.
for (int index = 0; index < meshIndices.Length; index += 3)
{
Vector3 firstVertex = meshVertices[meshIndices[index]];
Vector3 secondVertex = meshVertices[meshIndices[index + 1]];
Vector3 thirdVertex = meshVertices[meshIndices[index + 2]];
// The triangle may belong to multiple sectors. We will copy the whole triangle
// to all of the sectors it belongs to. This will fill in seams on sector edges
// although it could cause some amount of visible z-fighting if rendering a wireframe.
Vector3 firstSector = VectorToSector(firstVertex);
AddTriangleToSector(firstSector, firstVertex, secondVertex, thirdVertex);
// If the second sector doesn't match the first, copy the triangle to the second sector.
Vector3 secondSector = VectorToSector(secondVertex);
if (secondSector != firstSector)
{
AddTriangleToSector(secondSector, firstVertex, secondVertex, thirdVertex);
}
// If the third sector matches neither the first nor second sector, copy the triangle to the
// third sector.
Vector3 thirdSector = VectorToSector(thirdVertex);
if (thirdSector != firstSector && thirdSector != secondSector)
{
AddTriangleToSector(thirdSector, firstVertex, secondVertex, thirdVertex);
}
// Limit our run time so that we don't cause too many frame drops.
// Only checking every few iterations or so to prevent losing too much time to checking the clock.
if ((index % 30 == 0) && ((Time.realtimeSinceStartup - startTime) > MaxFrameTimeInSeconds))
{
// Debug.LogFormat("{0} of {1} processed", index, meshIndices.Length);
stopwatch.Stop();
yield return(null);
stopwatch.Start();
startTime = Time.realtimeSinceStartup;
}
}
startTime = Time.realtimeSinceStartup;
// Now we have all of our triangles assigned to the correct mesh, we can make all of the meshes.
// Each sector will have its own mesh.
foreach (MeshData meshData in meshSectors.Values)
{
// Construct the mesh.
meshData.Commit();
// Make sure we don't build too many meshes in a single frame.
if ((Time.realtimeSinceStartup - startTime) > MaxFrameTimeInSeconds)
{
stopwatch.Stop();
yield return(null);
stopwatch.Start();
startTime = Time.realtimeSinceStartup;
}
}
}
// Wait a frame
stopwatch.Stop();
yield return(null);
stopwatch.Start();
// All done - can free up marshal pinned memory
dll.UnpinAllObjects();
// Done
IsImportActive = false;
// Mark the timestamp
timeLastImportedMesh = Time.time;
stopwatch.Stop();
int deltaFrameCount = (Time.frameCount - startFrameCount + 1);
if (stopwatch.Elapsed.TotalSeconds > 0.75)
{
Debug.LogWarningFormat("Import_UnderstandingMesh took {0:N0} frames ({1:N3} ms)",
deltaFrameCount,
stopwatch.Elapsed.TotalMilliseconds
);
}
}