'use strict';

if (!("Hist2D" in this)){
    var Hist2D = {

        Hist2D : function(nx, xmin, xmax, ny, ymin, ymax)
        {
            var arr = new Array(nx);

            arr.get = function(x, y)
            {
                var ix = parseInt(nx*(x-xmin)/(xmax-xmin));
                var iy = parseInt(ny*(y-ymin)/(ymax-ymin));

                if (!arr[ix])
                    return 0;

                if (!arr[ix][iy])
                    return 0;

                return arr[ix][iy];
            }

            arr.fill = function(x, y, w)
            {
                var ix = parseInt(nx*(x-xmin)/(xmax-xmin));
                var iy = parseInt(ny*(y-ymin)/(ymax-ymin));

                if (ix<0 || ix>=nx || iy<0 || iy>=ny)
                    return false;

                if (!arr[ix])
                    arr[ix] = new Array(ny);

                if (!arr[ix][iy])
                    arr[ix][iy] = 0;

                arr[ix][iy] += w ? w : 1;

                return true;
            }

            arr.print = function()
            {
                var line1 = "   |";
                for (var ix=0; ix<nx; ix++)
                    line1 += " %3d ".$(ix);

                var line2 = "---+";
                for (var ix=0; ix<nx; ix++)
                    line2 += "+----";
                line2+="+----";

                console.out("", line1, line2);

                var sum = 0;
                var sx = [];
                for (var ix=0; ix<nx; ix++)
                    sx[ix] = 0;

                for (var iy=ny-1; iy>=0; iy--)
                {
                    var line = "%3d|".$(iy);

                    var sy = 0;
                    for (var ix=0; ix<nx; ix++)
                    {
                        var val = arr[ix] ? arr[ix][iy] : "";
                        line += " %4s".$(val?val:"");

                        if (arr[ix])
                        {
                            sy     += val?val:0;
                            sx[ix] += val?val:0;
                        }
                    }

                    sum += sy;

                    console.out(line+"|%4d".$(sy));
                }

                console.out(line2);

                line = "   |";
                for (var ix=0; ix<nx; ix++)
                    line += " %4d".$(sx[ix]);

                console.out(line+"|%4d".$(sum), "");
            }

            return arr;
        },
    };
}
else{
    console.out("multiple include of 'Hist2D.js'")
}