/// <summary>
/// Calculate grid points for circular chart
/// </summary>
/// <param name="radius"></param>
/// <param name="center"></param>
/// <param name="spikesCount"></param>
/// <returns></returns>
private List <Point> GetGridPoints4Radar(Double radius, Point center, Double spikesCount)
{
Double startAngle = -Math.PI / 2;
Double actualAngle = startAngle;
Int32 nextIteration = 1;
Double minAngle = 0;
List <Point> points = new List <Point>();
Double minAngleInDegree = 360 / spikesCount;
for (Int32 i = 0; i < spikesCount; i++)
{
Double x = radius * Math.Cos(actualAngle) + center.X;
Double y = radius * Math.Sin(actualAngle) + center.Y;
points.Add(new Point(x, y));
minAngle = minAngleInDegree * nextIteration++;
actualAngle = AxisLabel.GetRadians(minAngle) - (Math.PI / 2);
}
return(points);
}
/// <summary>
/// Get point for Radar
/// </summary>
/// <param name="circularPlotDetails"></param>
/// <param name="plotGroup"></param>
/// <param name="dp"></param>
/// <param name="dataPointIndex"></param>
/// <returns></returns>
private static Point GetRadarPoint(CircularPlotDetails circularPlotDetails, PlotGroup plotGroup, DataPoint dp, Double dataPointIndex)
{
Double yValue;
if (Double.IsNaN(dp.InternalYValue))
{
yValue = 0;
}
else
{
yValue = dp.InternalYValue;
}
Double yPosition = Graphics.ValueToPixelPosition(circularPlotDetails.Radius, 0, plotGroup.AxisY.InternalAxisMinimum, plotGroup.AxisY.InternalAxisMaximum, yValue);
Double radius = circularPlotDetails.Radius - yPosition;
Double minAngle = circularPlotDetails.MinAngleInDegree * dataPointIndex;
Double actualAngle = AxisLabel.GetRadians(minAngle) - (Math.PI / 2);
Double x = radius * Math.Cos(actualAngle) + circularPlotDetails.Center.X;
Double y = radius * Math.Sin(actualAngle) + circularPlotDetails.Center.Y;
return(new Point(x, y));
}
/// <summary>
/// Calculate AxisX points for Circular chart
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="axisX"></param>
/// <param name="maxDataPointsCount"></param>
internal void CalculateAxisXLabelsPoints4Polar(Double width, Double height, Boolean isAxisLabelsEnabled, List<Double> angles, Double minValue, Double maxValue)
{
Double radius = Math.Min(width, height) / 2;
Double reducedPercent = 10;
if (isAxisLabelsEnabled)
reducedPercent = 20;
Radius = radius - (radius * reducedPercent / 100);
Center = new Point(width / 2, height / 2);
AnglesInRadian = new List<Double>();
Double minValInRadian;
if (minValue != 0)
minValInRadian = AxisLabel.GetRadians(minValue - 90);
else
minValInRadian = 2 * Math.PI - Math.PI / 2;
Double minAngle = Graphics.ValueToPixelPosition(minValInRadian, 2 * Math.PI + minValInRadian, AxisLabel.GetRadians(minValue), AxisLabel.GetRadians(maxValue), AxisLabel.GetRadians(minValue));
MinAngleInDegree = minAngle * 180 / Math.PI;
for (Int32 i = 0; i < angles.Count; i++)
{
Double actualAngle = Graphics.ValueToPixelPosition(minValInRadian, 2 * Math.PI + minValInRadian, AxisLabel.GetRadians(minValue), AxisLabel.GetRadians(maxValue), AxisLabel.GetRadians(angles[i]));
Double x = Radius * Math.Cos(actualAngle) + Center.X;
Double y = Radius * Math.Sin(actualAngle) + Center.Y;
ListOfPoints4CircularAxis.Add(new Point(x, y));
AnglesInRadian.Add(actualAngle);
}
}
/// <summary>
/// Calculate AxisX points for Circular chart
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="axisX"></param>
/// <param name="maxDataPointsCount"></param>
internal void CalculateAxisXLabelsPoints4Radar(Double width, Double height, Boolean isAxisLabelsEnabled, Int32 maxDataPointsCount)
{
Int32 noOfSpikes = maxDataPointsCount;
Double startAngle = -Math.PI / 2;
Double actualAngle = startAngle;
Int32 nextIteration = 1;
Double minAngle = 0;
Double radius = Math.Min(width, height) / 2;
Double reducedPercent = 10;
if (isAxisLabelsEnabled)
{
reducedPercent = 20;
}
Radius = radius - (radius * reducedPercent / 100);
Center = new Point(width / 2, height / 2);
//ListOfPoints4CircularAxis = new List<Point>();
AnglesInRadian = new List <Double>();
MinAngleInDegree = 360.0 / noOfSpikes;
for (Int32 i = 0; i < noOfSpikes; i++)
{
Double x = Radius * Math.Cos(actualAngle) + Center.X;
Double y = Radius * Math.Sin(actualAngle) + Center.Y;
ListOfPoints4CircularAxis.Add(new Point(x, y));
AnglesInRadian.Add(actualAngle);
minAngle = MinAngleInDegree * nextIteration++;
actualAngle = AxisLabel.GetRadians(minAngle) - (Math.PI / 2);
}
}
/// <summary>
/// Get point for Polar
/// </summary>
/// <param name="circularPlotDetails"></param>
/// <param name="plotGroup"></param>
/// <param name="dp"></param>
/// <returns></returns>
private static Point GetPolarPoint(CircularPlotDetails circularPlotDetails, PlotGroup plotGroup, DataPoint dp)
{
Double yValue = dp.InternalYValue;
Double yPosition = Graphics.ValueToPixelPosition(circularPlotDetails.Radius, 0, plotGroup.AxisY.InternalAxisMinimum, plotGroup.AxisY.InternalAxisMaximum, yValue);
Double radius = circularPlotDetails.Radius - yPosition;
Axis axisX = plotGroup.AxisX;
Double minValInRadian;
if (axisX.InternalAxisMinimum != 0)
{
minValInRadian = AxisLabel.GetRadians(axisX.InternalAxisMinimum - 90);
}
else
{
minValInRadian = 2 * Math.PI - Math.PI / 2;
}
Double actualAngle;
if (dp.Parent.XValueType == ChartValueTypes.Time)
{
actualAngle = Graphics.ValueToPixelPosition(minValInRadian, 2 * Math.PI + minValInRadian, AxisLabel.GetRadians(0), AxisLabel.GetRadians(360), AxisLabel.GetRadians(dp.InternalXValue));
}
else
{
actualAngle = Graphics.ValueToPixelPosition(minValInRadian, 2 * Math.PI + minValInRadian, AxisLabel.GetRadians(axisX.InternalAxisMinimum), AxisLabel.GetRadians(axisX.InternalAxisMaximum), AxisLabel.GetRadians(axisX.InternalAxisMinimum + dp.InternalXValue));
}
Double x = radius * Math.Cos(actualAngle) + circularPlotDetails.Center.X;
Double y = radius * Math.Sin(actualAngle) + circularPlotDetails.Center.Y;
return(new Point(x, y));
}