public void GetVertices(IntPtr faceHandle, List <Vector3> vertices)
{
IntPtr verticesHandle = IntPtr.Zero;
int verticesNum = 0;
ExternApi.ArAugmentedFace_getMeshVertices(m_NativeSession.SessionHandle, faceHandle,
ref verticesHandle, ref verticesNum);
int floatNum = verticesNum * 3;
if (m_TempVertices == null || m_TempVertices.Length != floatNum)
{
m_TempVertices = new float[floatNum];
}
Marshal.Copy(verticesHandle, m_TempVertices, 0, floatNum);
vertices.Clear();
vertices.Capacity = verticesNum;
for (int i = 0; i < floatNum; i += 3)
{
vertices.Add(new Vector3(m_TempVertices[i], m_TempVertices[i + 1], -m_TempVertices[i + 2]));
}
}