Flowlayout rect

struct Point {
    let x : Double
    let y : Double
}


struct Rect {
    let h : Double
    let w : Double
}

func getPoint(_ out : Rect, _ array : [Rect] ) -> [Point]{
    guard array.count > 0 else { return []}
    var res = [Point]()
    var currx: Double = 0
    var curry: Double = 0
    var maxCurrW : Double = 0
    var i = 0

    while i < array.count {
        let rect = array[i]
        if rect.w + currx > out.w { return [] } // not valid input
        if rect.h + curry > out.h {
            if curry == 0 { return  [] } // not valid input
            // need to col
            curry = 0
            currx += maxCurrW
            maxCurrW = 0
            continue
        }
        // put on current col
        res.append(Point(x: currx, y: curry))
        maxCurrW = max(maxCurrW, rect.w)
        curry += rect.h
        i += 1
    }
    return res
}