public AffineTransform(Box from_box, Box to_box)
{
_matrix = new double[6] { 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 };
Translate(-from_box.X1, -from_box.Y1);
Scale(to_box.Width / from_box.Width, to_box.Height / from_box.Height);
Translate(to_box.X1, to_box.X1);
}
public bool Intersects(Box rhs)
{
return ((rhs._x1 <= _x1 && _x1 <= rhs._x2) || (_x1 <= rhs._x1 && rhs._x1 <= _x2)) &&
((rhs._y1 <= _y1 && _y1 <= rhs._y2) || (_y1 <= rhs._y1 && rhs._y1 <= _y2));
}
public void ExpandToInclude(Box rhs)
{
_x1 = Math.Min(_x1, rhs._x1);
_y1 = Math.Min(_y1, rhs._y1);
_x2 = Math.Max(_x2, rhs._x2);
_y2 = Math.Max(_y2, rhs._y2);
}
public double GetOverlappingArea(Box rhs)
{
double rightMostLeft = Math.Max(_x1, rhs._x1);
double leftMostRight = Math.Min(_x2, rhs._x2);
double bottomMostTop = Math.Max(_y1, rhs._y1);
double topMostBottom = Math.Min(_y2, rhs._y2);
if (leftMostRight <= rightMostLeft) return 0.0;
if (topMostBottom <= bottomMostTop) return 0.0;
return (leftMostRight - rightMostLeft) * (topMostBottom - bottomMostTop);
}
public bool Contains(Box rhs)
{
return
_x1 <= rhs._x1 && rhs._x1 <= _x2 &&
_x1 <= rhs._x2 && rhs._x2 <= _x2 &&
_y1 <= rhs._y1 && rhs._y1 <= _y2 &&
_y1 <= rhs._y2 && rhs._y2 <= _y2;
}