Recursive function to calculate a grid

calculate.js

function calculate(cols, nb){

        _this_.cols = cols;
        _this_.rows = Math.ceil(nb/cols);
        _this_.rest = nb % cols;

        _this_.boxDim = _this_.width/cols - 2*_this_.border;

        if(_this_.boxDim <= 1){
            debug.exec('warn', 'Dimensions of the boxes are too small to be seen');
        }

        //Recurses if the height of the resulting grid is greater than the settings height
        if((_this_.boxDim+2*_this_.border)*_this_.rows > _this_.height){
            calculate(cols + 1, nb);
        }
    }

calculate_init.js

//We start by computing the rendered grid recursively, we want at minimum 2 columns, since it's a grid
//We call the recursive function to calculate the grid at the beginning of the script
//Once it's done, the grid is calculated
calculate(2, _this_.nb_items);