private UIBezierPath[] SplitPath(LiquittableCircle circle, LiquittableCircle other, nfloat ratio)
{
var p1p2 = CircleConnectedPoint(circle, other, CoreGraphicsExtensions.DegToRad(60));
var p3p4 = CircleConnectedPoint(other, circle, CoreGraphicsExtensions.DegToRad(60));
var p1 = p1p2.Item1;
var p2 = p1p2.Item2;
var p3 = p3p4.Item1;
var p4 = p3p4.Item2;
var crossed = CoreGraphicsExtensions.Intersection(p1, p3, p2, p4);
if (crossed != null)
{
var d1 = CircleConnectedPoint(circle, other, 0).Item1;
var d2 = CircleConnectedPoint(other, circle, 0).Item1;
var r = (ratio - connectThresh) / (AngleThreshold - connectThresh);
var a1 = d2.Split(crossed.Value, r * r);
var part = new UIBezierPath();
part.MoveTo(p1);
part.AddQuadCurveToPoint(p2, a1);
part.ClosePath();
var a2 = d1.Split(crossed.Value, r * r);
var part2 = new UIBezierPath();
part2.MoveTo(p3);
part2.AddQuadCurveToPoint(p4, a2);
part2.ClosePath();
return(new[] { part, part2 });
}
return(new UIBezierPath[0]);
}
private UIBezierPath NormalPath(LiquittableCircle circle, LiquittableCircle other)
{
var p1p2 = CircleConnectedPoint(circle, other);
var p3p4 = CircleConnectedPoint(other, circle);
var p1 = p1p2.Item1;
var p2 = p1p2.Item2;
var p3 = p3p4.Item1;
var p4 = p3p4.Item2;
var crossed = CoreGraphicsExtensions.Intersection(p1, p3, p2, p4);
if (crossed != null)
{
var path = new UIBezierPath();
var r = CircleRatio(circle, other);
path.MoveTo(p1);
var r1 = p2.Mid(p3);
var r2 = p1.Mid(p4);
var rate = (1 - r) / (1 - AngleThreshold) * Viscosity;
var mul = r1.Mid(crossed.Value).Split(r2, rate);
var mul2 = r2.Mid(crossed.Value).Split(r1, rate);
path.AddQuadCurveToPoint(p4, mul);
path.AddLineTo(p3);
path.AddQuadCurveToPoint(p2, mul2);
path.ClosePath();
return(path);
}
return(null);
}
private UIBezierPath PathPlus(nfloat rotation)
{
var radius = Frame.Width * internalRadiusRatio * 0.5f;
var center = Center.Minus(Frame.Location);
var points = new[] {
CoreGraphicsExtensions.CirclePoint(center, radius, CoreGraphicsExtensions.PI2 * 0f + rotation),
CoreGraphicsExtensions.CirclePoint(center, radius, CoreGraphicsExtensions.PI2 * 1f + rotation),
CoreGraphicsExtensions.CirclePoint(center, radius, CoreGraphicsExtensions.PI2 * 2f + rotation),
CoreGraphicsExtensions.CirclePoint(center, radius, CoreGraphicsExtensions.PI2 * 3f + rotation)
};
var path = new UIBezierPath();
path.MoveTo(points[0]);
path.AddLineTo(points[2]);
path.MoveTo(points[1]);
path.AddLineTo(points[3]);
return(path);
}