The Essential Guide to HTML5

BLACKJACK

Code Explanation

ctx.drawImage(playerhand[pi].picture,

playerxp,playeryp,cardw,cardh);

Draws on the canvas

playerxp = playerxp+30; Adjust the horizontal pointer

pi++; Increases the count of cards to the
player

if (more_to_house()) { if function to say there should be
more cards for the dealer

househand[hi] = dealfromdeck(2); Deals a card to the house

ctx.drawImage(househand[hi].picture,

housexp,houseyp,cardw,cardh);

Draws a card on canvas

housexp = housexp+20; Adjusts the horizontal pointer

hi++; Increases the count of cards to the
dealer

} Closes the if-true clause

} Close function

function more_to_house(){ Header for the function determining
the dealer
s moves

var ac = 0; Variable to hold the count of aces

var i; Variable for iteration

var sumup = 0; Initializes the variable for the sum

for (i=0;i<hi;i++) { Iterates over all the cards

sumup += househand[i].value; Adds up value of cards in the
dealer
s hand

if (househand[i].value==1) {ac++;} Keeps track of the number of aces

} Closes the for loop