/// <inheritdoc/>
public bool Equals(Line2 other)
{
if (ReferenceEquals(null, other))
{
return(false);
}
if (ReferenceEquals(this, other))
{
return(true);
}
return(P.Equals(other.P) &&
Direction.Equals(other.Direction));
}
/// <summary>
/// Determines the if a point <paramref name="p"/> intersects a line segment defined by <paramref name="a"/> and <paramref name="b"/>.
/// </summary>
/// <param name="a">An end point of a segment.</param>
/// <param name="b">An end point of a segment.</param>
/// <param name="p">A point.</param>
/// <returns>True when a point intersects a line segment.</returns>
[Pure] public static bool Intersects(Point2 a, Point2 b, Point2 p)
{
if (p.Equals(a) || p.Equals(b))
{
return(true);
}
Point2.Order(ref a, ref b);
var d = b - a;
var v = p - a;
var aDot = d.Dot(v);
return(
(aDot <= 0)
? (0 == v.X && 0 == v.Y)
: (
!(aDot >= d.GetMagnitudeSquared()) &&
(d.X * v.Y) - (d.Y * v.X) == 0.0
)
);
}
/// <summary>
/// Indicates whether the current object is equal to another object of the same type.
/// </summary>
/// <returns>
/// <c>true</c> if the current object is equal to the <paramref name="other"/> parameter; otherwise, <c>false</c>.
/// </returns>
/// <param name="other">An object to compare with this object.</param>
public bool Equals(Ray2 other)
{
return(!ReferenceEquals(null, other) &&
P.Equals(other.P) &&
Direction.Equals(other.Direction));
}
/// <inheritdoc/>
public bool Equals(Segment2 other)
{
return(!ReferenceEquals(null, other) &&
A.Equals(other.A) &&
B.Equals(other.B));
}