public override void RenderToBuffer(MandelbrotSet set, PixelBuffer buffer)
{
var renderer = new ContourRenderer(this.tracer);
Palette palette = new DefaultPalette();
int maxCount = set.EstimateMaxCount();
var bandMap = new LogarithmicBandMap(maxCount, 30.0);
renderer.Render(buffer, set, bandMap, maxCount);
buffer.ApplyPalette(palette);
}
public override double Evaluate(MandelbrotSet set)
{
double retval = 0.0;
// Use logarithmic band map but combine fewer bands than we will in full rendering
var bandMap = new LogarithmicBandMap(set.EstimateMaxCount(), 55.0);
this.Buffer.Clear();
this.ContourRenderer.Render(this.Buffer, set, bandMap, set.EstimateMaxCount());
// The more contours, the more interesting
retval = this.ContourRenderer.NumberOfContours;
var histogram = new Histogram();
histogram.Evaluate(this.Buffer);
int pointsInSet = histogram.GetValue(-1);
// If at least some points in the set appear, it is more interesting
if (pointsInSet > 0)
{
if ((pointsInSet == (size * size)))
return Double.NegativeInfinity;
retval *= 1.6;
// Reduce the interest if there are too many points in the set
double r = ((double)(size * size) / pointsInSet) / 100;
retval += r;
}
// The more different colors the more interesting. Scaled so we don't get too complex.
// Use negative to make more colors less interesting, thus reducing noisy areas
retval += histogram.NumberOfValues / 1.0;
// All else being equal, favor pictures of lower estimated count and thus speed
// This is also a zoom avoidance feature
// retval -= set.EstimateMaxCount() / 200;
return retval;
}