/// Intersection
///
/// Sets the rectangle to the intersection of two rectangles.
/// Returns true if there is any intersection between the two rectangles.
/// If there is no intersection, the rectangle is set to 0, 0, 0, 0.
/// Either of the input rectangles may be the same as destination rectangle.
///
public bool Intersection(Rect2D r1, Rect2D r2)
{
if (!TriangulationUtil.RectsIntersect(r1, r2))
{
Left = Right = Top = Bottom = 0.0;
return(false);
}
Left = (r1.Left > r2.Left) ? r1.Left : r2.Left;
Top = (r1.Top < r2.Top) ? r1.Top : r2.Top;
Right = (r1.Right < r2.Right) ? r1.Right : r2.Right;
Bottom = (r1.Bottom > r2.Bottom) ? r1.Bottom : r2.Bottom;
return(true);
}
/// Union
///
/// Sets the rectangle to the union of two rectangles r1 and r2.
/// If either rect is empty, it is ignored. If both are empty, the rectangle
/// is set to r1.
/// Either of the input rectangle references may refer to the destination rectangle.
///
public void Union(Rect2D r1, Rect2D r2)
{
if ((r2.Right == r2.Left) || (r2.Bottom == r2.Top))
{
Set(r1);
}
else if ((r1.Right == r1.Left) || (r1.Bottom == r1.Top))
{
Set(r2);
}
else
{
Left = (r1.Left < r2.Left) ? r1.Left : r2.Left;
Top = (r1.Top > r2.Top) ? r1.Top : r2.Top;
Right = (r1.Right > r2.Right) ? r1.Right : r2.Right;
Bottom = (r1.Bottom < r2.Bottom) ? r1.Bottom : r2.Bottom;
}
}
public bool Equals(Rect2D r, double epsilon)
{
if (!MathUtil.AreValuesEqual(MinX, r.MinX, epsilon))
{
return(false);
}
if (!MathUtil.AreValuesEqual(MaxX, r.MaxX))
{
return(false);
}
if (!MathUtil.AreValuesEqual(MinY, r.MinY, epsilon))
{
return(false);
}
if (!MathUtil.AreValuesEqual(MaxY, r.MaxY, epsilon))
{
return(false);
}
return(true);
}
public bool ContainsInclusive(Rect2D r, double epsilon)
{
return(((Left - epsilon) <= r.Left) && ((Right + epsilon) >= r.Right) && ((Top - epsilon) <= r.Top) && ((Bottom + epsilon) >= r.Bottom));
}
public bool ContainsInclusive(Rect2D r)
{
return((Left <= r.Left) && (Right >= r.Right) && (Top <= r.Top) && (Bottom >= r.Bottom));
}
public bool Contains(Rect2D r)
{
return((Left < r.Left) && (Right > r.Right) && (Top < r.Top) && (Bottom > r.Bottom));
}
public bool Equals(Rect2D r)
{
return(Equals(r, MathUtil.EPSILON));
}