protected override MutableObject Mutate(MutableObject mutable)
{
var frequencies = ByteHistogram.GetFirstValue(mutable);
var saturation = Saturation.GetFirstValue(mutable);
var value = Value.GetFirstValue(mutable);
var frequencyBands = new List <FrequencyBand>();
var totalSize = (float)frequencies.Sum(f => f);
var currentPosition = 0f;
int i = 0;
foreach (var frequency in frequencies)
{
frequencyBands.Add(new FrequencyBand
{
Byte = i++,
Color = ColorUtility.HsvtoRgb(currentPosition / totalSize, saturation, value),
Start = currentPosition / totalSize,
End = (currentPosition + frequency) / totalSize,
Frequency = frequency
});
currentPosition = currentPosition + frequency;
}
frequencyBands.Sort((a, b) => 0 - a.Frequency.CompareTo(b.Frequency));
var smoothGradient = SmoothGradient.GetFirstValue(mutable);
var numberOfPoints = Keypoints.GetFirstValue(mutable);
var edgeWidth = EdgeWidth.GetFirstValue(mutable);
var primaryColor = PrimaryColor.GetFirstValue(mutable);
var primaryImpactOnBands = PrimaryImpactOnBands.GetFirstValue(mutable);
var newGradient = new ColorGradient(numberOfPoints * (smoothGradient?1:2));
frequencyBands = frequencyBands.Take(numberOfPoints).OrderBy(f => f.Start).ToList();
if (smoothGradient)
{
for (var k = 0; k < Mathf.Min(numberOfPoints, frequencyBands.Count); k++)
{
{
newGradient.AddColorKey(new GradientColorKey(
frequencyBands[k].Color,
(frequencyBands[k].Start + frequencyBands[k].End) / 2f));
}
}
}
else
{
for (var k = 1; k < Mathf.Min(numberOfPoints, frequencyBands.Count); k++)
{
var k1 = frequencyBands[k - 1].Color;
newGradient.AddColorKey(new GradientColorKey(
Color.Lerp(frequencyBands[k - 1].Color,
primaryColor, primaryImpactOnBands),
frequencyBands[k - 1].Start + edgeWidth / 2f));
var k2 = frequencyBands[k - 1].Color;
newGradient.AddColorKey(new GradientColorKey(
Color.Lerp(frequencyBands[k - 1].Color,
primaryColor, primaryImpactOnBands),
frequencyBands[k].Start - edgeWidth / 2f));
if (k1 != k2)
{
throw new Exception("What? How are these colors not matched?");
}
}
}
HistogramGradient.SetValue(newGradient, mutable);
return(mutable);
}