public unsafe override void GetFaceMesh(
TrackableId faceId,
Allocator allocator,
ref XRFaceMesh faceMesh)
{
int vertexCount, triangleCount;
void *vertexPtr, indexPtr, uvPtr;
var faceAnchor = UnityARKit_FaceProvider_AcquireFaceAnchor(
faceId,
out vertexPtr, out uvPtr, out vertexCount,
out indexPtr, out triangleCount);
if (faceAnchor == null)
{
faceMesh.Dispose();
faceMesh = default(XRFaceMesh);
return;
}
try
{
faceMesh.Resize(
vertexCount,
triangleCount,
XRFaceMesh.Attributes.UVs,
allocator);
var vertexJob = new TransformVerticesJob
{
// Use a Vector4 b/c the data is a simd primitive,
// so we need something that consists of 4 floats
verticesIn = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <Vector4>(vertexPtr, vertexCount, Allocator.None),
verticesOut = faceMesh.vertices
};
var vertexJobHandle = vertexJob.Schedule(vertexCount, 32);
var uvJob = new TransformUVsJob
{
uvsIn = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <Vector2>(uvPtr, vertexCount, Allocator.None),
uvsOut = faceMesh.uvs
};
var uvJobHandle = uvJob.Schedule(vertexCount, 32);
var indexJob = new TransformIndicesJob
{
triangleIndicesIn = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <Triangle <short> >(indexPtr, triangleCount, Allocator.None),
// "cast" it to an array of Triangles
triangleIndicesOut = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <Triangle <int> >(faceMesh.indices.GetUnsafePtr(), triangleCount, Allocator.None)
};
var indexJobHandle = indexJob.Schedule(triangleCount, 32);
// Wait on all three
JobHandle.CombineDependencies(vertexJobHandle, indexJobHandle, uvJobHandle).Complete();
}
finally
{
UnityARKit_FaceProvider_ReleaseFaceAnchor(faceAnchor);
}
}
