private static void DrawCompare(this SKCanvas canvas, SKImageInfo info, CelestialDrawModel origin, CelestialDrawModel compare)
{
var originRadius = origin.Radius;
var compareRadius = compare.Radius;
var maxCanvasWidth = info.Width;
var maxCanvasHeight = info.Height;
var maxRadius = DoubleHelper.GetMax(originRadius, compareRadius);
var minRadius = DoubleHelper.GetMin(originRadius, compareRadius);
var divisionFactor = maxCanvasWidth * 0.9 / (minRadius * 4 > maxRadius ? 2 : 1);
var factor = maxRadius / divisionFactor;
var originFactoredRadius = (int)DoubleHelper.GetMax(Math.Floor(originRadius / factor), 1);
var compareFactoredRadius = (int)DoubleHelper.GetMax(Math.Floor(compareRadius / factor), 1);
var originCentreX = GetCentreX(maxCanvasWidth, originFactoredRadius, true);
var compareCentreX = GetCentreX(maxCanvasWidth, compareFactoredRadius, false);
var centreY = maxCanvasHeight / 2;
var originDraw = new CanvasDrawModel(origin.Id, origin.Description, originFactoredRadius, originCentreX, centreY, origin.Color, null, null, 0);
var compareDraw = new CanvasDrawModel(compare.Id, compare.Description, compareFactoredRadius, compareCentreX, centreY, compare.Color, null, null, 0);
canvas.Draw(originDraw);
canvas.Draw(compareDraw);
}
private static int GetCentreX(int canvasWidth, int factoredRadius, bool lefthand)
{
var halfCanvasWidth = (int)DoubleHelper.GetMax((int)Math.Floor(canvasWidth * 0.5), 1);
if (factoredRadius >= halfCanvasWidth)
{
return(lefthand
? (int)Math.Floor(canvasWidth * 0.45) - factoredRadius
: (int)Math.Floor(canvasWidth * 0.55) + factoredRadius);
}
if (factoredRadius * 2 < halfCanvasWidth)
{
return(lefthand
? (int)Math.Floor(canvasWidth * 0.25)
: (int)Math.Floor(canvasWidth * 0.75));
}
return(lefthand
? 0
: canvasWidth);
}
public static double GetEllipticity(this ICalculatableRadius model) => 1 - (DoubleHelper.GetMin(model.EquatorialRadius, model.PolarRadius) / DoubleHelper.GetMax(model.EquatorialRadius, model.PolarRadius));