public bool DoRectanglesIntersect(Rectange r1, Rectange r2)
{
var condition1 = r2.Left > r1.Right; //R1 is totally left of R2
var condition2 = r2.Right < r1.Left; //R1 is totall right of R2
var condition3 = r2.Top < r1.Bottom; //R1 is on top of R2
var condition4 = r2.Bottom > r1.Top; //R1 is on the bottom of R2
return(!(condition1 || condition2 || condition3 || condition4));
}
//more than 2 rectanges, rectanges can be rotated at an angle
public Rectange IntersectionOfRectangle(Rectange r1, Rectange r2)
{
if (r1 == null)
{
return(r2);
}
if (r2 == null)
{
return(r1);
}
return(new Rectange()
{
Top = Math.Max(r1.Top, r2.Top),
Bottom = Math.Min(r1.Bottom, r2.Bottom),
Left = Math.Max(r1.Left, r2.Left),
Right = Math.Min(r1.Right, r2.Right)
});
}