I have a function isoToScreen(x, y) that converts Isometric coordinates to Screen coordinates.

var tileW = 16;
var tileH = 16;

var isoToScreen = function(x, y) {
    var posX = (x - y) * tileW;
    var posY = (x + y) * tileH / 2;

    return [posX, posY];
};

But how would I make a function that converts screen coordinates back to Isometric coordinates?

var pos = screenToIso(16, 8); 
pos[0] = 1; // Iso X
pos[1] = 0; // Iso Y

Thanks in advance.

I have a function isoToScreen(x, y) that converts Isometric coordinates to Screen coordinates.

var tileW = 16;
var tileH = 16;

var isoToScreen = function(x, y) {
    var posX = (x - y) * tileW;
    var posY = (x + y) * tileH / 2;

    return [posX, posY];
};

But how would I make a function that converts screen coordinates back to Isometric coordinates?

var pos = screenToIso(16, 8); 
pos[0] = 1; // Iso X
pos[1] = 0; // Iso Y

I am have function "isoToScreen(x, y);" who convert Isometric cordinates to Screen cordinates.

Something like -> var pos = isoToScreen(1, 0); pos[0] = 16 // Screen X, pos[1] = 8 // Screen Y

function is here: http://pastebin.com/bT9XY0Su (Sorry I am don't understand how to post here code with multiple lines)

But how create var pos = screenToIso(16, 8); pos[0] = 1; // Iso X, pos[1] = 0 // Iso Y

How to create function who convert Screen Cordinates to Isometric Cordinates?

Sorry for my bad English language. Thanks.

I have a function isoToScreen(x, y) that converts Isometric coordinates to Screen coordinates.

var tileW = 16;
var tileH = 16;

var isoToScreen = function(x, y) {
    var posX = (x - y) * tileW;
    var posY = (x + y) * tileH / 2;

    return [posX, posY];
};

But how would I make a function that converts screen coordinates back to Isometric coordinates?

var pos = screenToIso(16, 8); 
pos[0] = 1; // Iso X
pos[1] = 0; // Iso Y

Thanks in advance.