Dice Game - The Essential Guide to HTML5 - page 56

var ctx;

var dx;

var dy;

var firstturn = true;

Global variable, initialized to the
value true

var point; Global variable, does not need to

be initialized because it will be set
before use

function throwdice() {

Start of throwdice function

var sum; Variable to hold the sum of the

values for the 2 dice

var ch = 1+Math.floor(Math.random()*6); Set ch with the first random value

Assign this to sum

sum = ch;

dx = dicex; Set dx

dy = dicey; set dy

drawface(ch);

Draw the first die face

dx = dicex + 150;

Adjust the horizontal position

ch=1 + Math.floor(Math.random()*6);

Set ch with a random value. This
is the one for the second die.

sum += ch; Add ch to what is already in sum

drawface(ch);

Draw the second die

if (firstturn) {

Now start the implementation of
the rules. Is it a first turn?

switch(sum) { If it is, start a switch with sum as

the condition

case 7: For 7