private void PlotPanel(PaintEventArgs e, LensRayTransferFunction.VariableParameter shownParam)
{
base.OnPaint(e);
Graphics g = e.Graphics;
// scale drawing area to [0; sampleCount-1] x [0; 1]
g.ScaleTransform(e.ClipRectangle.Width / (float)sampleCount, -e.ClipRectangle.Height);
g.TranslateTransform(0, -1);
g.Clear(Color.White);
var values = SelectRayParameterDimension(outgoingRays, shownParam).ToList();
double?lastValue = null;
Pen linePen = new Pen(Color.Black, 40 / (float)e.ClipRectangle.Height);
for (int i = 0; i < values.Count; i++)
{
var value = values[i];
if (value.HasValue)
{
g.FillRectangle(Brushes.LightBlue, i, 0, 1, (float)value.Value);
}
else
{
g.FillRectangle(Brushes.LightSalmon, i, 0, 1, 1);
}
if ((lastValue != null) && (value != null))
{
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.DrawLine(linePen, i - 0.5f, (float)lastValue.Value, i + 0.5f, (float)value.Value);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.None;
}
lastValue = value;
}
}
/// <summary>
/// Create a one-dimensional list of value of particular dimension
/// from the list with all dimensions. Eg. select only list of
/// direction phi's.
/// </summary>
/// <param name="rays"></param>
/// <param name="?"></param>
/// <returns></returns>
private IEnumerable <double?> SelectRayParameterDimension(
IList <LensRayTransferFunction.Parameters> rays,
LensRayTransferFunction.VariableParameter dimension)
{
return(rays.Select((ray) => (ray != null) ? (double?)ray[dimension] : null));
}
