public PlottableVectorField(Vector2[,] vectors, double[] xs, double[] ys, string label, Color color, Colormap colormap, double scaleFactor)
{
//the magnitude squared is faster to compute than the magnitude
double minMagnitudeSquared = vectors[0, 0].Length();
double maxMagnitudeSquared = vectors[0, 0].Length();
for (int i = 0; i < xs.Length; i++)
{
for (int j = 0; j < ys.Length; j++)
{
if (vectors[i, j].LengthSquared() > maxMagnitudeSquared)
{
maxMagnitudeSquared = vectors[i, j].LengthSquared();
}
else if (vectors[i, j].LengthSquared() < minMagnitudeSquared)
{
minMagnitudeSquared = vectors[i, j].LengthSquared();
}
}
}
double minMagnitude = Math.Sqrt(minMagnitudeSquared);
double maxMagnitude = Math.Sqrt(maxMagnitudeSquared);
double[,] intensities = new double[xs.Length, ys.Length];
for (int i = 0; i < xs.Length; i++)
{
for (int j = 0; j < ys.Length; j++)
{
if (colormap != null)
{
intensities[i, j] = (vectors[i, j].Length() - minMagnitude) / (maxMagnitude - minMagnitude);
}
vectors[i, j] = Vector2.Multiply(vectors[i, j], (float)(scaleFactor / (maxMagnitude * 1.2))); //This is not a true normalize
}
}
if (colormap != null)
{
double[] flattenedIntensities = intensities.Cast <double>().ToArray();
arrowColors = Colormap.GetColors(flattenedIntensities, colormap);
}
this.vectors = vectors;
this.xs = xs;
this.ys = ys;
this.label = label;
this.color = color;
this.colormap = colormap;
this.scaleFactor = scaleFactor;
pen = new Pen(color);
pen.CustomEndCap = new AdjustableArrowCap(2, 2);
}
public VectorField(Vector2[,] vectors, double[] xs, double[] ys, Colormap colormap, double scaleFactor, Color defaultColor)
{
double minMagnitudeSquared = vectors[0, 0].LengthSquared();
double maxMagnitudeSquared = vectors[0, 0].LengthSquared();
for (int i = 0; i < xs.Length; i++)
{
for (int j = 0; j < ys.Length; j++)
{
if (vectors[i, j].LengthSquared() > maxMagnitudeSquared)
{
maxMagnitudeSquared = vectors[i, j].LengthSquared();
}
else if (vectors[i, j].LengthSquared() < minMagnitudeSquared)
{
minMagnitudeSquared = vectors[i, j].LengthSquared();
}
}
}
double minMagnitude = Math.Sqrt(minMagnitudeSquared);
double maxMagnitude = Math.Sqrt(maxMagnitudeSquared);
double[,] intensities = new double[xs.Length, ys.Length];
for (int i = 0; i < xs.Length; i++)
{
for (int j = 0; j < ys.Length; j++)
{
if (colormap != null)
{
intensities[i, j] = (vectors[i, j].Length() - minMagnitude) / (maxMagnitude - minMagnitude);
}
vectors[i, j] = Vector2.Multiply(vectors[i, j], (float)(scaleFactor / (maxMagnitude * 1.2)));
}
}
double[] flattenedIntensities = intensities.Cast <double>().ToArray();
VectorColors = colormap is null?
Enumerable.Range(0, flattenedIntensities.Length).Select(x => defaultColor).ToArray() :
Colormap.GetColors(flattenedIntensities, colormap);
this.Vectors = vectors;
this.Xs = xs;
this.Ys = ys;
}
