is intersect --> rectIntersect necessary?

[nabsul]

Is it my imagination, or is the use of this function redundant? Instead of doing all combinations of two dimensions, why not just do all three dims at the same time? Or one dimension at a time?

func rectIntersect(i1, i2 *Item, x, y Axis) bool {
	d1 := i1.GetDimension()
	d2 := i2.GetDimension()

	cx1 := i1.Position[x] + d1[x]/2
	cy1 := i1.Position[y] + d1[y]/2
	cx2 := i2.Position[x] + d2[x]/2
	cy2 := i2.Position[y] + d2[y]/2

	ix := math.Max(cx1, cx2) - math.Min(cx1, cx2)
	iy := math.Max(cy1, cy2) - math.Min(cy1, cy2)

	return ix < (d1[x]+d2[x])/2 && iy < (d1[y]+d2[y])/2
}