public void SetPixel(int x, int y, ColorD c)
{
Color sdc = c.ToColor();
var rgba = new byte[] { sdc.R, sdc.G, sdc.B, sdc.A };
Pixels.SetArea(x, y, 1, 1, rgba);
}
public ColorD GetPixel(int x, int y)
{
var rgba = Pixels.GetArea(x, y, 1, 1);
Color sdc = Color.FromArgb(rgba[0], rgba[1], rgba[2], rgba[3]);
return(ColorD.FromColor(sdc));
}
public ColorD GetColor(double index, double maximum)
{
double z = index / maximum;
GradientColour(z, Grad, out double r, out double g, out double b, out double a);
return(ColorD.FromArgb(a, r, g, b));
}
static void CreateColorMapTest()
{
IColorMap cmap = GetColorMap(out string name);
using (var img = new MagicCanvas(Options.Width, Options.Height))
{
for (int x = 0; x < Options.Width; x++)
{
ColorD c = cmap.GetColor(x, Options.Width);
img.DrawLine(c, x, 0, x, Options.Height - 1);
}
img.SavePng("ColorMapTest-" + name + ".png");
}
}
static ColorD FindColorFromRange(double min, double max, double val)
{
//iterate HSL L=[0 to 1] S=1 H[0 to 360]
double range = max - min;
double spacemax = 256.0 * 360.0; //L * H
double pos = (val - min) / range * spacemax;
//basically map 2D HxL space into one dimension
double s = 1.0;
//double l = (pos / spacemax) * 0.9 + 0.05; //clip the edges by 5%
double l = pos / spacemax;
double h = (pos % (360.0 * 4)) / (360.0 * 4); //4 slows down the cycle 4x
ColorHelpers.HSLToRGB(h, s, l, out double r, out double g, out double b);
return(ColorD.FromArgb(1.0, r, g, b));
}
static void PaintImageData(IDensityMatrix matrix, IColorMap cm, ICanvas img, ColorComponent comp = ColorComponent.None)
{
double lm = matrix.Maximum;
// find minimum method
double ln = double.MaxValue;
for (int y = 1; y < Options.Height - 1; y++)
{
for (int x = 1; x < Options.Width - 1; x++)
{
double li = matrix[x, y];
if (li > 0.0 && li < ln)
{
ln = li;
}
}
}
Debug.WriteLine("ln = " + ln);
//chop at most frequent value
//double hmax = 0.0;
//int cmax = 0;
//var histogram = new Dictionary<double,int>();
//for (int y = 1; y < Options.Height - 1; y++) {
// for (int x = 1; x < Options.Width - 1; x++) {
// double li = matrix[x, y];
// if (li < double.Epsilon || double.IsInfinity(li) || double.IsNaN(li)) { continue; }
// if (!histogram.TryGetValue(li,out int val)) {
// val = 1;
// } else {
// val++;
// }
// if (val > cmax) {
// cmax = val;
// hmax = li;
// }
// histogram[li] = val;
// }
//}
// Debug.WriteLine("hmax = "+hmax+" cmax = "+cmax);
//find minimum method using average of blocks
//double ln = double.MaxValue;
//int aspect = 32;
//int aw = (Options.Width - 1) / aspect;
//int ah = (Options.Height - 1) / aspect;
//for (int ay = 1; ay < ah; ay++) {
// for (int ax = 1; ax < aw; ax++) {
// int ys = ay * aspect; int ye = ys + aspect - 1;
// int xs = ax * aspect; int xe = xs + aspect - 1;
// double avg = 0.0;
// for(int y = ys; y < ye; y++) {
// for(int x = xs; x < xe; x++) {
// if (x >= 0 && x < Options.Width && y >=0 && y < Options.Height) {
// double li = matrix[x, y];
// avg += li;
// }
// }
// }
// avg /= (aspect * aspect);
// if (avg > 0.0 && avg < ln) { ln = avg; }
// }
//}
//Debug.WriteLine("ln = "+ln);
//find average method
//double total = 0.0;
//long count = 0;
//for (int y = 1; y < Options.Height - 1; y++) {
// for (int x = 1; x < Options.Width - 1; x++) {
// double li = matrix[x, y];
// if (li >= 0.0 && !double.IsInfinity(li) && !double.IsNaN(li)) {
// total += li;
// count++;
// }
// }
//}
//double ln = total / count;
//Debug.WriteLine("ln = "+ln);
for (int y = 0; y < Options.Height; y++)
{
for (int x = 0; x < Options.Width; x++)
{
double li = matrix[x, y];
ColorD c = cm.GetColor(li - ln, lm - ln);
if (comp != ColorComponent.None)
{
img.SetPixelComponent(x, y, comp, c.GetComponent(comp));
}
else
{
img.SetPixel(x, y, c);
}
}
}
}
public void DrawLine(ColorD color, double x1, double y1, double x2, double y2)
{
Draws.FillColor(color.ToColor());
Draws.Line(x1, y1, x2, y2);
}
public ColorD GetColor(double index, double maximum)
{
double pct = Math.Log(1 + index) / Math.Log(1 + maximum);
return(ColorD.FromArgb(1.0, pct, pct, pct));
}