/// <summary>
/// Histogram descriptor for calculating the cube root of a tetrahedron given by four random vertices.
/// </summary>
/// <param name="mesh">The mesh of which the descriptor value is calculated.</param>
/// <returns>The histogram descriptor with the calculated histogram.</returns>
public static HistDescriptor CubeRootTetrahedron(IMesh mesh)
{
double binSize = 0.075;
int[] binValues = new int[Settings.BinsPerHistogram];
Parallel.For(0, Settings.ValuesPerHistogram, i => {
Random random = RandomUtil.ThreadSafeRandom;
Vector3[] randomVertices = GetRandomVertices(mesh, random, 4);
double volume = Math.Pow(Functions.GetTetVolume(randomVertices), (1d / 3d));
int bin = Math.Min((int)(volume / binSize), binValues.Length - 1);
Interlocked.Increment(ref binValues[bin]);
});
return(HistDescriptor.FromIntHistogram("CubeRootTetrahedron", binSize, binValues));
}
/// <summary>
/// Histogram descriptor for calculating the angle between three random vertices.
/// </summary>
/// <param name="mesh">The mesh of which the descriptor value is calculated.</param>
/// <returns>The histogram descriptor with the calculated histogram.</returns>
public static HistDescriptor AngleVertices(IMesh mesh)
{
double binSize = 18;
int[] binValues = new int[Settings.BinsPerHistogram];
Parallel.For(0, Settings.ValuesPerHistogram, i => {
Random random = RandomUtil.ThreadSafeRandom;
Vector3[] randomVertices = GetRandomVertices(mesh, random, 3);
double angle = Functions.GetAngleVertices(randomVertices);
int bin = Math.Min((int)(angle / binSize), binValues.Length - 1);
Interlocked.Increment(ref binValues[bin]);
});
return(HistDescriptor.FromIntHistogram("AngleVertices", binSize, binValues));
}
/// <summary>
/// Histogram descriptor for calculating the distance between two random vertices.
/// </summary>
/// <param name="mesh">The mesh of which the descriptor value is calculated.</param>
/// <returns>The histogram descriptor with the calculated histogram.</returns>
public static HistDescriptor DistanceVertices(IMesh mesh)
{
double binSize = 0.25;
int[] binValues = new int[Settings.BinsPerHistogram];
Parallel.For(0, Settings.ValuesPerHistogram, i => {
Random random = RandomUtil.ThreadSafeRandom;
Vector3[] randomVertices = GetRandomVertices(mesh, random, 2);
float distance = Vector3.Distance(randomVertices[0], randomVertices[1]);
int bin = Math.Min((int)(distance / binSize), binValues.Length - 1);
Interlocked.Increment(ref binValues[bin]);
});
return(HistDescriptor.FromIntHistogram("DistanceVertices", binSize, binValues));
}
private static IDescriptor DeserialiseDescriptor(string name,
string serialised)
{
//Check whether value is an ElemDescriptor or HistDescriptor
if (ElemDescriptor.TryParse(name, serialised, out ElemDescriptor edesc))
{
return(edesc);
}
else if (HistDescriptor.TryParse(name, serialised, out HistDescriptor hdesc))
{
return(hdesc);
}
else
{
throw new NotImplementedException(
string.Format(
Settings.Culture,
Resources.EX_Not_Supported,
serialised
)
);
}
}
