func newRectangeFromRect(rect rtree.Rectangle) *rectangle {
r := &rectangle{}
x, y := rect.LowerLeft()
r.xlow = x
r.ylow = y
x, y = rect.UpperRight()
r.xhigh = x
r.yhigh = y
return r
}
func equal(r1, r2 rtree.Rectangle) bool {
xlow1, ylow1 := r1.LowerLeft()
xhigh2, yhigh2 := r2.UpperRight()
xhigh1, yhigh1 := r1.UpperRight()
xlow2, ylow2 := r2.LowerLeft()
return xlow1 == xlow2 && xhigh1 == xhigh2 && ylow1 == ylow2 && yhigh1 == yhigh2
}
func (r *rectangle) adjust(rect rtree.Rectangle) {
x, y := rect.LowerLeft()
if x < r.xlow {
r.xlow = x
}
if y < r.ylow {
r.ylow = y
}
x, y = rect.UpperRight()
if x > r.xhigh {
r.xhigh = x
}
if y > r.yhigh {
r.yhigh = y
}
}
func getCenter(rect rtree.Rectangle) (int32, int32) {
xlow, ylow := rect.LowerLeft()
xhigh, yhigh := rect.UpperRight()
return (xhigh + xlow) / 2, (yhigh + ylow) / 2
}
func intersect(rect1 *rectangle, rect2 rtree.Rectangle) bool {
xhigh2, yhigh2 := rect2.UpperRight()
xlow2, ylow2 := rect2.LowerLeft()
return xhigh2 >= rect1.xlow && xlow2 <= rect1.xhigh && yhigh2 >= rect1.ylow && ylow2 <= rect1.yhigh
}
