/// <summary>
/// Initializes a new instance of the <see cref="PolygonFactory"/>
/// class. The environment provided is used for default values.
/// Optionally a custom random generator can be provided.
/// </summary>
/// <param name="env">The configuration.</param>
/// <param name="r">Custom random number generator.</param>
public PolygonFactory(EvolutionaryAlgorithm env, Random r = null)
{
this.environment = env;
// Assign given generator to r or default if null
this.r = r ?? new Random();
}
/// <summary>
/// Converts a little endian byte array of [ ( 4 + 8 x PolygonEdgeCount ) * PolygonCount ] bytes
/// to a <see cref="ICanvas"/> object using settings in the given <seealso cref="EvolutionaryAlgorithm"/>.
/// </summary>
/// <param name="bytes">Bytes to convert</param>
/// <param name="ea">Algorithm to get PolygonCount and PolygonEdgeCount from</param>
/// <returns>A canvas for the given EvolutionaryAlgorithm</returns>
public static ICanvas AsCanvas(this byte[] bytes, EvolutionaryAlgorithm ea)
{
// per polygon: 4B+8B*coords
// per canvas: (4B+8B*C)*N where N=polygoncount
var expectedPerPolygon = 4 + (8 * ea.PolygonEdgeCount);
var expectedPerCanvas = expectedPerPolygon * ea.PolygonCount;
if (bytes.Length != expectedPerCanvas)
{
throw new ArgumentException(string.Format("expected {0} bytes, got {1}.", expectedPerCanvas, bytes.Length));
}
var canvas = new Canvas(ea);
canvas.Elements = new List <IShape>();
for (int i = 0; i < bytes.Length; i += expectedPerPolygon)
{
canvas.Elements.Add(bytes.Skip(i).Take(expectedPerPolygon).ToArray().AsPolygon());
}
return(canvas);
}
/// <summary>
/// Initializes a new instance of the <see cref="Canvas"/> class. It
/// used the given algorithm as environment to run in. The created
/// canvas is still empty (i.e. has no shapes in it yet).
/// </summary>
/// <param name="environment">The context for this individual.</param>
public Canvas(EvolutionaryAlgorithm environment)
{
this.Environment = environment;
}
/// <summary>
/// Converts a little endian byte array of [ ( 32 + 64 x PolygonEdgeCount ) * PolygonCount ] bits
/// to a <see cref="ICanvas"/> object using settings in the given <seealso cref="EvolutionaryAlgorithm"/>.
/// </summary>
/// <param name="bits">Bits to convert</param>
/// <param name="ea">Algorithm to get PolygonCount and PolygonEdgeCount from</param>
/// <returns>A canvas for the given EvolutionaryAlgorithm</returns>
public static ICanvas AsCanvas(this bool[] bits, EvolutionaryAlgorithm ea)
{
return(bits.AsByteArray().AsCanvas(ea));
}
/// <summary>
/// Initializes a new instance of the <see cref="AlgorithmEvent"/>
/// class. Contains the algorithm itself by default.
/// </summary>
/// <param name="current">The algorithm for this event</param>
public AlgorithmEvent(EvolutionaryAlgorithm current)
{
this.Current = current;
}
