面试题：回旋数

算法面试题：
形如一下：
横向右为x正坐标
竖向下为y正坐标
（0，0）= 1
（1，0）=2
（1，1）=3
（0，1）=4
（-1，1）=5
…
计算坐标（-7，5）对应值

var Point = function (x,y) {
    this.x = x;
    this.y = y;
}
function getValue(x,y) {
    // 求绝对值
    var ceilX = Math.abs(x);
    var ceilY = Math.abs(y);
    
    var compareMin = compareMax = new Point(0,0);
    var compare = ceilX;
    if (ceilX < ceilY) { //横向比对，y值固定
        compare = y;
        compareMin.y = compareMax.y = y;
        compareMin.x = y
        if (y < 0) {
            compareMax.x = -y + 1;
        }else
        {
            compareMax.x = -y;
        }
    }else
    {
        compare = x;
        compareMin.x = compareMax.x = x;
        compareMax.y = x;
        if (x > 0 ) {
            compareMin.y = -x+1;
        }
        else{
            compareMin.y = -x;
        }
    }
    console.log("compareMin:"+compareMin.x+",y= "+compareMin.y);
    
    var count = 1;
    function checkValue(checkX,checkY) {
        count ++;
        if (count > 1000) {
            console.log("error=====")
        return true
    }
    // console.log("========================================="+count);
    if (x == checkX && y == checkY ) {
        return true ;
    }
    }
    
    var gradientX = gradientY = 0 ;
    var ret = 1;
    var breakCount = 10;
    var checkOver = false ;
    
    while (!checkOver) {
    
        checkOver = checkValue(gradientX,gradientY)
        
        var ceilGX = Math.abs(gradientX)
        var ceilGY = Math.abs(gradientY);
        // x递增，
        while (!checkOver && gradientY<= 0 && ceilGX <= ceilGY ) {
            gradientX ++
            ret ++;
            ceilGX = Math.abs(gradientX)
            checkOver = checkValue(gradientX,gradientY)
            
            // console.log("ceilX == "+ceilGX +",....ceilY == "+ceilGY);
            // console.log("1111,minX== "+gradientX+",minY == " + gradientY +"....ret = "+ret);
        }
        //(1,0)=>(1,1)
        //y 递增
        while (!checkOver && gradientX > 0 && ceilGX > ceilGY ) {
            gradientY ++;
            ret ++;
            ceilGY = Math.abs(gradientY)
            checkOver = checkValue(gradientX,gradientY)
            
            // console.log("2222,minX== "+gradientX+",minY == " + gradientY +"....ret = "+ret);
        }
        //x 递降
        //（1，1）=》（-1，1）
        while (!checkOver && gradientY>0 && (ceilGX < ceilGY||gradientX == gradientY) ) {
            gradientX --
            ret ++;
            ceilGX = Math.abs(gradientX)
            checkOver = checkValue(gradientX,gradientY)
            
            // console.log("ceilX == "+ceilGX +",....ceilY == "+ceilGY);
            // console.log("333,minX== "+gradientX+",minY == " + gradientY +"....ret = "+ret);
        }
        //(-1,1)=>(-1,-1)
        while (!checkOver && gradientX < 0 && (ceilGX > ceilGY || gradientX == -gradientY) ) {
            gradientY --;
            ret ++;
            ceilGY = Math.abs(gradientY)
            checkOver = checkValue(gradientX,gradientY)
            
            // console.log("444444,minX== "+gradientX+",minY == " + gradientY +"....ret = "+ret);
        }
    }
    return ret;
    
}
    
var v = getValue(-2,-2);
console.log("value == "+v);