Get Random Positions On A Plane

#Generate an array of random non-repeating positions in the same plane(Vertical)
    #<param name="startPos">Start position of the plane</param>
    #<param name="endPos">End position of the plane</param>
    #<param name="size">The spatial size of each object</param>
    #<param name="num">Number of positions to get</param>
    GetRandomPosInPlaneVertical(startPos: vector3 , endPos:vector3 , size:vector3, num: int ): []vector3=    
        #First, cut the plane into 'n' cells according to the size of the object.
        var sizePos :vector3= endPos - startPos; 

        var maxNum: int = 0
        var y:int = 0;
        var z:int = 0;
        if:
            tmpY:int = Int[sizePos.Y / size.Y] 
            tmpZ:int = Int[sizePos.Z / size.Z] 

        then:
            set maxNum = tmpY * tmpZ; 
            set y = tmpY 
            set z = tmpZ 
        #Arrange these cells into an array by serial number.
        var allList: []int = for (i:= 1..maxNum): 
            i
            
        #Randomise a number from array
        var getListNum :[]int = array{};
        loop:
            rand: int = GetRandomInt(0,allList.Length - 1)
            if:
                r: int = allList[rand];
            then:
                arr:[]int = array{r} 
                set getListNum += arr
                if (NewArray := allList.RemoveElement[rand]): 
                    set allList = NewArray
            if(getListNum.Length >= num or allList.Length <= 0):
                break