/// <summary>
///
/// </summary>
/// <param name="width">Width of the resulting image</param>
/// <param name="height">Height of the resulting image</param>
/// <param name="xPeriod">Defines repetition of marble lines in x direction</param>
/// <param name="yPeriod">Defines repetition of marble lines in y direction</param>
/// <param name="turbPower">Makes twists, the greater the more twists(5.0 - 1.0), 0 ==> it becomes a normal sine pattern</param>
/// <param name="turbSize">Initial size of the turbulence, lowering this increaseas the agressive effect (16.0), increasing it makes it more subtle (128.0)</param>
/// <returns></returns>
public static byte[] Marble(int width, int height, double xPeriod = 0, double yPeriod = 0, double turbPower = 5.0, double turbSize = 32.0, int seed = -1)
{
var noise = White.Generate(width, height, seed);
var data = new byte[width * height];
//xPeriod and yPeriod together define the angle of the lines
//xPeriod and yPeriod both 0 ==> it becomes a normal clouds or turbulence pattern
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
var xy = i * xPeriod / width + j * yPeriod / height + turbPower * White.Turbulence(i, j, turbSize, width, height, noise) / 256.0;
var sine = (byte)(Math.Abs(Math.Sin(xy * Math.PI)) * 255);
data[j * width + i] = sine;
}
}
return(data);
}
public static byte[] WoodRings(int width, int height, double xyPeriod = 12.0, double turbPower = 0.1, double turbSize = 32.0, int seed = -1)
{
var noise = White.Generate(width, height, seed);
var data = new byte[width * height];
//xPeriod and yPeriod together define the angle of the lines
//xPeriod and yPeriod both 0 ==> it becomes a normal clouds or turbulence pattern
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
var xValue = (i - width / 2.0) / width;
var yValue = (j - height / 2.0) / height;
var distance = Math.Sqrt(xValue * xValue + yValue * yValue) + turbPower * White.Turbulence(i, j, turbSize, width, height, noise) / 256.0;
var sine = (byte)(Math.Abs(Math.Sin(2 * xyPeriod * distance * Math.PI)) * 128.0);
data[j * width + i] = sine;
}
}
return(data);
}
