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Game.score = 0;

resetMovingObjects();

updateStatistics();

drawPlayfield();

}

function resetMovingObjects() {

$("#paddle").css("left", (Game.playfield.width - Game.paddle.width) / 2);

$("#ball").css("left", (Game.playfield.width - Game.ball.diameter) / 2);

$("#ball").css("top", parseInt($("#paddle").css("top")) - Game.paddle.height);

}

function updateStatistics() {

$('#lives').text(Game.lives);

$('#score').text(Game.score);

}

function drawPlayfield() {

var colors = ['blue', 'green', 'red', 'yellow'];

var $playfield = $('#playfield');

$playfield.children('.row').remove();

for (var row = 0; row < Game.playfield.rows; row++) {

var $row = $('<div class="row"></div>');

$row.appendTo($playfield);

for (var col = 0; col < Game.playfield.columns; col++) {

var $block = $("<div class='block'></div>");

$block.css("background", 'url("img/' + colors[row] + '.png")');

$block.appendTo($row);

}

initGame

pretty much deserves its name, because it actually initializes the

game. It sets a few properties of the

Game

object to their default values

directly. Then it calls several functions for initializing specific game objects.

resetMovingObjects

sets the positions of the ball and the paddle to their default

values. The paddle appears at the middle of the playfield’s bottom. The ball

then sits on top of the paddle.

updateStatistics

copies the current number of lives and the current score to the

HTML page. It uses jQuery’s

text

method to set the text of the elements speci-

fied by the IDs

lives

and

score

. In the

initGame

function, the game’s default values

will be copied, of course, but we’ll call this function later on, when the game

is running.

The

drawPlayfield

function draws the bricks that the player has to hit with the

ball. It creates four

<div>

elements with their

class

attribute set to

row

. Within

Chapter 7. Writing a Game for the Motion-Sensing Game Controller • 118

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Brand	Arduino
Model	NG
Category	Motherboard
Language	English

Arduino NG User Manual

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