private void DrawSamples(RadarChartSample[] samples, string axis, double lineLength, double currentAngle)
{
var axisSamples = samples.Where(s => s.AxisShortName == axis);
foreach (var sample in axisSamples)
{
var valueLength = sample.Value * sample.Scale * lineLength / MaxValue;
var dx = valueLength * Math.Sin(currentAngle);
var dy = valueLength * Math.Cos(currentAngle);
SampleToAngleDictionary.Add(sample, currentAngle);
DrawSample(sample, CanvasWidth / 2 + dx, CanvasHeight / 2 + dy, currentAngle);
}
}
public void RedrawChart(RadarChartSample[] samples)
{
SampleToAngleDictionary.Clear();
ClearCanvas();
if (samples == null || !samples.Any())
{
return;
}
var axes = samples.Select(s => s.AxisShortName).ToArray();
var currentAngle = 0d;
var angleChange = (2 * Math.PI) / axes.Length;
var lineLength = CanvasHeight < CanvasWidth ? CanvasHeight / 2 : CanvasWidth / 2;
CalculatedMaxLineLength = lineLength;
List <Tuple <double, double> > previousTicks = null;
List <Tuple <double, double> > firstTicks = null;
foreach (var axis in axes)
{
DrawAxis(axis, lineLength, currentAngle);
var ticks = CalculateTicks(axis, currentAngle, lineLength, axes.Length < 3);
if (axes.Length > 2)
{
if (firstTicks == null)
{
firstTicks = new List <Tuple <double, double> >(ticks);
}
if (previousTicks != null)
{
DrawWebLines(previousTicks, ticks);
}
previousTicks = ticks;
}
DrawSamples(samples, axis, lineLength, currentAngle);
currentAngle += angleChange;
}
if (axes.Length > 2)
{
DrawWebLines(firstTicks, previousTicks);
}
DrawValueRangePolygon(samples, lineLength, MaxValue);
DrawValueCompartmentsPolygons(lineLength);
}
