public bool Intersect(VectorGeneric2 vector, out Vector2 result)
{
var intersection = Vector2.zero;
var source = new Straight {
Origin = vector.Origin, Direction = vector.Target - vector.Origin
};
if (!source.Intersect(this, out result))
{
return(false);
}
return(Vector3.Dot(
Vector3.Cross(Origin - intersection, Vector3.forward).normalized,
Vector3.Cross(Target - intersection, Vector3.forward).normalized) > 0);
}
public bool Intersect(VectorGeneric2 vector, out Vector2 point)
{
point = Vector2.zero;
var plane = new Plane(Vector3.Cross(Direction, Vector3.forward), Origin);
if (plane.SameSide(vector.Origin, vector.Target))
{
return(false);
}
var originDistance = Mathf.Abs(plane.GetDistanceToPoint(vector.Origin));
var targetDistance = Mathf.Abs(plane.GetDistanceToPoint(vector.Target));
point = vector.Origin + vector.Direction * originDistance / (originDistance + targetDistance);
return(true);
}
public static bool GetIntersectionInParentSpace(this RectTransform source, Straight cutting, out VectorGeneric2 result)
{
var intersections = source.GetSidesInParentSpace().Aggregate(new List <Vector2>(2), (acm, _) =>
{
Vector2 intersection;
if (cutting.Intersect(_, out intersection))
{
acm.Add(intersection);
}
return(acm);
}).ToArray();
//var points = source.GetSidesInParentSpace().Select(_ => _.Origin).ToArray();
//Debug.Log(string.Format("<color=blue>PARENT points: {0}, {1}, {2}, {3},</color>", points[0], points[1], points[2], points[3] ));
result = intersections.Length == 0
? new VectorGeneric2()
: new VectorGeneric2
{
Origin = Vector2.Dot(cutting.Direction, intersections[1] - intersections[0]) > 0f ? intersections[0] : intersections[1],
Target = Vector2.Dot(cutting.Direction, intersections[1] - intersections[0]) > 0f ? intersections[1] : intersections[0]
};
return(intersections.Length != 0);
}