Arduino Uno Quick Start Manual page 138

function handleMessageState(message) {
$("#" + message).show();
if (Game.controller.buttonPressed) {
$("#" + message).hide();
initGame();
}
}
The gameLoop function is surprisingly simple, because it only checks the game s
current state and then delegates its work accordingly. If the game is paused
currently, it checks whether the player has pressed the game controller s
button. If yes, it changes the game s state to
If the game is running already,
potential collisions, and updates the game s statistics. If the game was won
or lost, it calls handleMessageState
handleMessageState
content. It also checks whether the game controller s button was pressed. If
yes, it hides the message and initializes the game so the player can start a
new round. After a player has won or lost a game, he or she can start a new
game by pressing the button on the game controller.
Moving the objects on the screen is the most important part in many video
games. Thanks to jQuery, it s not that difficult.
BrowserGame/Arduinoid/js/arduinoid.js
function moveBall() {
Line 1
var ball_pos = $("#ball").position();
-
var ball_x = ball_pos.left;
-
var ball_y = ball_pos.top;
-
var next_x_pos = ball_x + Game.ball.vx;
5
var next_y_pos = ball_y + Game.ball.vy;
-
-
if (next_x_pos <= 0) {
-
Game.ball.vx *= -1;
-
next_x_pos = 1;
10
} else if (next_x_pos >= Game.playfield.width - Game.ball.diameter) {
-
Game.ball.vx *= -1;
-
next_x_pos = Game.playfield.width - Game.ball.diameter - 1;
-
}
-
15
var paddle_y = $("#paddle").position().top;
-
if (next_y_pos <= 0) {
-
Game.ball.vy *= -1;
-
next_y_pos = 1;
-
} else if (next_y_pos + Game.ball.diameter >= paddle_y) {
20
var paddle_x = $("#paddle").position().left;
-
Chapter 7. Writing a Game for the Motion-Sensing Game Controller
gameLoop
to display a corresponding message.
displays a message by manipulating an HTML element s
www.it-ebooks.info
GameStates.RUNNING .
moves all game objects, checks for
120
report erratum discuss