public static bool IsOnLine(Point2d p1, Point2d p2, double x, double y, double w)
{
var s1 = p1.Distance(x, y);
var s2 = p2.Distance(x, y);
var s3 = p1.Distance(p2);
var d = (s3 * s3 + s1 * s1 - s2 * s2) / (2 * s3);
if (d >= 0 && d <= s3)
{
var hh = s1 * s1 - d * d;
if (hh < w * w)
{
return(true);
}
}
return(false);
}
public static bool IsOnCircle(Point2d p1, Point2d center, double radius, double w)
{
var distance = p1.Distance(center);
if (distance > (radius + w))
{
return(false);
}
else
{
return(true);
}
}
