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index.html
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<!doctype html>
<html>
<head>
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no"/>
<meta name="apple-mobile-web-app-capable" content="yes" />
<title>Galaxy Trip</title>
</head>
<body>
<script>
/**
* Galaxy Trip
*
* Copyright (c) 2012 Ivailo Hristov, Hristo Vladev
*
* MIT License
*/
//
// TODO: V2
//
// messages => shield, good job
// anti-gravity
// bonuses
// sounds
// full screen mode
// save records
//
// Big boss that follows you( and shoots you ),
// you run and get to the weapon, the you destroy
// it and win( 10 levels for each boss )
//
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
//
window.requestAnimationFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( callback ){
window.setTimeout(callback, 1000 / 60);
};
})();
//////////////////////////////////////////////////
// GAME SETTINGS
//////////////////////////////////////////////////
/*
* Visible area( and canvas ) width.
*/
WIDTH = window.innerWidth;
/*
* Visible area( and canvas ) height.
*/
HEIGHT = window.innerHeight;
/*
* Visible area( and canvas ) diagonal length.
*/
DIAGONAL = Math.sqrt( WIDTH*WIDTH + HEIGHT*HEIGHT );
/*
* Degree in radians
*/
DEGREE = Math.PI/180;
/*
* Check if it is android browser
*/
IS_ANDROID = /Android/.test(navigator.userAgent) && !/Chrome/.test(navigator.userAgent);
/*
* Max number of bodies that can exist
* at the same time in the world. Calculate
* this form game dimensions.
*/
BODIES_LENGTH = DIAGONAL/20;
/*
* Gravity area size relative to circle radius
*/
GRAVITY_AREA_TO_RADIUS = 2 / 1;
/*
* Shield area size relative to circle radius
*/
SHIELD_AREA_TO_RADIUS = 5 / 3;
/*
* Minimum radius of enemy circles
*/
MIN_BODY_RADIUS = 5;
/*
* Maximum radius of enemy circles
*/
MAX_BODY_RADIUS = 80;
/*
* Player start radius
*/
PLAYER_START_RADIUS = 15;
/*
* Player maximum radius
*/
PLAYER_MAX_RADIUS = 25;
/*
* How much times current velocity will be reduced
* when impulse is applied.
*/
VELOCITY_REDUCE_ON_IMPULSE = 3;
/*
* Bigger number => lower gravity.
*
*/
GRAVITY_FACTOR = 300000;
/*
* How much times current radius will be reduced
* when impulse is applied. Reduce is calculated as a
* part of applied power.
*/
RADIUS_REDUCE_TO_POWER = 12;
/*
* When bigger circle "eats" smaller one, 1/RADIUS_ABSORB
* part of the smaller circle`s radius will be absorbed by
* bigger circle.
*/
RADIUS_ABSORB = 10;
/*
* Distance between mouse position and circle radius
* relative to power of the impulse that will be applied.
*
*/
MAX_POWER = 15;
/*
* Whether do draw gravity area or not. This is
* a debug option.
*
*/
DRAW_GRAVITY_AREA = true;
/*
* How long shield that player gains
* when he reach max_radius will least.
*
*/
MAX_RADIUS_SHIELD_DURATION = 5000;
/*
* Velocity that will move area constantly and will
* kill you if you are too slow.
*
*/
STATIC_VELOCITY_X = 1;
STATIC_VELOCITY_Y = 1;
/*
* If power applied is bigger than this value,
* ACCELERATION effect will be shown;
*/
MIN_POWER_FOR_ACCELERATION = 0.35;
//////////////////////////////////////////////////
// GAME DATA
//////////////////////////////////////////////////
var
// Game wrapper element
//
wrapper = document.createElement('div'),
// Create game canvas and context
//
canvas = document.createElement('canvas'),
ctx = canvas.getContext('2d'),
// Layers list
//
layers = {
game: canvas,
message: document.createElement('canvas'),
start: document.createElement('canvas'),
end: document.createElement('canvas')
},
// Save message context
//
messageCtx = layers.message.getContext('2d'),
// List of all game objects/circles( + player )
//
bodies = [],
// Player body
//
player = null,
// How much user is far away from top left corner
//
scrollX = 0,
scrollY = 0,
// Player result which will be calculated live
//
result = 0,
// Current time
//
now = +(new Date),
// Generate canvases with different type of enemies
//
enemies = [
// Blue body and yellow core.
getEnemyCanvas({
gradientDark: '#26addd',
gradientLight: '#2bc0e6',
gradientLighter: '#6bd3ed',
core: '#fff000'
}, Math.floor((Math.random()*10)+1), Math.floor((Math.random()*10)+1)),
// Green body and orange core.
getEnemyCanvas({
gradientDark: '#429900',
gradientLight: '#92CD00',
gradientLighter: '#b3dc4d',
core: '#ffd800'
}, Math.floor((Math.random()*10)+1), Math.floor((Math.random()*10)+1)),
// Red body and yellow core.
getEnemyCanvas({
gradientDark: '#ff0000',
gradientLight: '#ff5a19',
gradientLighter: '#ff8b5e',
core: '#ffe719'
}, Math.floor((Math.random()*10)+1), Math.floor((Math.random()*10)+1)),
// Yellow body and blue core.
getEnemyCanvas({
gradientDark: '#ffcc00',
gradientLight: '#fffc00',
gradientLighter: '#fffd4d',
core: '#26addd'
}, Math.floor((Math.random()*10)+1), Math.floor((Math.random()*10)+1)),
// Yellow body and red core.
getEnemyCanvas({
gradientDark: '#ffa200',
gradientLight: '#ffde00',
gradientLighter: '#ffe84d',
core: '#ff0000'
}, Math.floor((Math.random()*10)+1), Math.floor((Math.random()*10)+1)),
// Violet body and white core.
getEnemyCanvas({
gradientDark: '#ba00ff',
gradientLight: '#ff00f0',
gradientLighter: '#ff4df4',
core: '#fff'
}, Math.floor((Math.random()*10)+1), Math.floor((Math.random()*10)+1)),
// Dark body and bright core.
getEnemyCanvas({
gradientDark: '#333',
gradientLight: '#666',
gradientLighter: '#999',
core: '#fff'
}, Math.floor((Math.random()*10)+1), Math.floor((Math.random()*10)+1))
],
// UI elements
//
ui = {
share: {
text: 'Share',
width: round(WIDTH/6),
height: round(WIDTH/8),
offsetRight: round(WIDTH/100),
offsetBottom: 10,
action: function(){
window.open('http://www.facebook.com/sharer/sharer.php?u=' + window.location );
},
isClicked: function( offsetX, offsetY ){
return isInRect( WIDTH - this.width - this.offsetRight, HEIGHT - this.height - this.offsetBottom, this.width, this.height, offsetX, offsetY )
},
draw: function(){
this.width = round(WIDTH/6);
this.height = round(WIDTH/8);
this.offsetRight = this.text === 'Tweet' ? round(WIDTH/100) * 23 : round(WIDTH/100);
var u = this,
cc = layers.end.getContext('2d'),
x = WIDTH - u.width - u.offsetRight,
y = HEIGHT - u.height - u.offsetBottom;
cc.clearRect( x - 10, y - 10, this.width + 20, this.height + 20 );
cc.fillStyle = 'rgba(0,0,0,0.1)';
cc.strokeStyle = 'rgba(0,0,0,0.5)';
cc.fillRect( x, y, this.width, this.height );
cc.strokeRect( x - 2, y - 2, this.width + 4, this.height + 4 );
cc.fillStyle = '#fff';
cc.strokeStyle = '#666';
cc.lineWidth = 0.5;
cc.shadowOffsetX = 0;
cc.shadowOffsetY = 0;
cc.shadowBlur = 10;
cc.shadowColor = 'rgba(0,0,0,0.3)';
cc.fillRect( x + 2, y + 2, this.width - 4, this.height - 4 );
cc.strokeRect( x + 2, y + 2, this.width - 4, this.height - 4 );
cc.shadowOffsetX = 1;
cc.shadowOffsetY = 1;
cc.shadowBlur = 0;
cc.font = 'bold ' + round(WIDTH/30) + 'px Verdana';
cc.textBaseline = "middle";
cc.textAlign = "center";
cc.fillStyle = '#333';
cc.fillText( u.text, x + this.width/2, y + this.height/2, this.width );
}
},
tweet: {
text: 'Tweet',
width: round(WIDTH/6),
height: round(WIDTH/8),
offsetRight: round(WIDTH/100) * 23,
offsetBottom: 10,
action: function(){
window.open('https://twitter.com/intent/tweet?source=webclient&text=I made score ' + result + ' on Galaxy Trip('+window.location.href+')!');
},
isClicked: function(){
return ui.share.isClicked.apply( this, arguments );
},
draw: function(){
return ui.share.draw.apply( this, arguments );
}
},
shield: {
width: round(WIDTH/6),
height: round(WIDTH/8),
offsetRight: -round(WIDTH/100),
offsetBottom: 10,
action: function(){
if( player.shield ){
player.stopShield();
this.fill = 'yellow';
} else {
player.startShield();
this.fill = 'orange';
}
this.draw();
},
draw: function(){
this.width = round(WIDTH/6);
this.height = round(WIDTH/8);
this.offsetRight = -round(WIDTH/100);
var cc = messageCtx,
x = -this.offsetRight,
y = HEIGHT - this.height - this.offsetBottom;
cc.clearRect( x - 10, y - 10, this.width + 20, this.height + 20 );
cc.fillStyle = 'rgba(0,0,0,0.1)';
cc.strokeStyle = 'rgba(0,0,0,0.5)';
cc.fillRect( x, y, this.width, this.height );
cc.strokeRect( x - 2, y - 2, this.width + 4, this.height + 4 );
cc.fillStyle = '#fff';
cc.strokeStyle = '#666';
cc.lineWidth = 0.5;
cc.shadowOffsetX = 0;
cc.shadowOffsetY = 0;
cc.shadowBlur = 10;
cc.shadowColor = 'rgba(0,0,0,0.3)';
cc.fillRect( x + 2, y + 2, this.width - 4, this.height - 4 );
cc.strokeRect( x + 2, y + 2, this.width - 4, this.height - 4 );
cc.shadowOffsetX = 1;
cc.shadowOffsetY = 1;
cc.shadowBlur = 0;
cc.font = 'bold ' + round(WIDTH/30) + 'px Verdana';
cc.textBaseline = "middle";
cc.textAlign = "center";
if( player.shield ){
cc.fillStyle = '#429900';
cc.fillText( "Shield", x + this.width/2, y + this.height/2, this.width );
} else {
cc.fillStyle = '#333';
cc.fillText( "Shield", x + this.width/2, y + this.height/2, this.width );
}
},
isClicked: function( offsetX, offsetY ){
return isInRect( -this.offsetRight, HEIGHT - this.height - this.offsetBottom, this.width, this.height, offsetX, offsetY );
}
}
},
// Used in explosions, tiles ...
//
particles = [],
// Loop and tmp vars
//
i, j, ent, cx, cy, nsx, nsy, cc, part;
//////////////////////////////////////////////////
// GAME ENTITY CLASS
//////////////////////////////////////////////////
var Circle = function(){
// Used for element position calculations
//
var rr = Math.random();
// Generate radius
//
this.radius = MIN_BODY_RADIUS + getRandomInt(MAX_BODY_RADIUS - MIN_BODY_RADIUS);
this.gravityRadius = this.radius*GRAVITY_AREA_TO_RADIUS;
this.shieldRadius = this.radius*SHIELD_AREA_TO_RADIUS;
// Generate position
//
this.x = this.startX = this.cx = scrollX + this.radius*2 + getRandomInt(WIDTH - this.radius*2);
this.y = this.startY = this.cy = scrollY + this.radius*2 + getRandomInt(HEIGHT - this.radius*2);
if( rr <= 0.33 ){
this.x += WIDTH;
} else if( rr <= 0.66 ){
this.y += HEIGHT;
} else {
this.x += WIDTH;
this.y += HEIGHT;
}
// Body visibility status
//
this.visible = false;
// Generate velocity
//
this.velocityX = Math.random() * 0.05 * (Math.random() > 0.5 ? 1 : - 1);
this.velocityY = Math.random() * 0.05 * (Math.random() > 0.5 ? 1 : - 1);
// Styles
//
this.model = getModel();
// Shield properties
//
this.shield = 0;
this.shieldEnd = 0;
this.shieldDuration = 0;
this.shieldTimer = null;
};
Circle.prototype = {
setRadius: function( r ){
// Negative radius will throw exception
//
if( r < 0 ) r = 0;
// Set new radius
//
this.radius = r;
this.gravityRadius = r*GRAVITY_AREA_TO_RADIUS;
this.shieldRadius = r*SHIELD_AREA_TO_RADIUS;
},
draw: function(){
// Locals
//
var g, cx, cy, cc;
// Calculate draw positions
//
cx = this.cx;
cy = this.cy;
// Calculate img size
//
cc = round(this.radius*2);
// Draw shield( if there is any )
//
if( this.shield ){
ctx.save();
ctx.fillStyle = 'rgba(0, 160, 255, ' + ((1 - Math.pow( 1 - (this.shieldEnd - now)/this.shieldDuration, 6))/5).toFixed(2) + ')';
ctx.lineWidth = 0.5;
ctx.strokeStyle = '#33CCCC';
ctx.beginPath();
ctx.arc( cx, cy, this.shieldRadius, 0, Math.PI * 2, true );
ctx.fill();
ctx.beginPath();
ctx.arc( cx, cy, this.shieldRadius + 1.5, 0, Math.PI * 2, true );
ctx.stroke();
ctx.restore();
}
// Draw circle
//
ctx.drawImage( this.model, cx - this.radius, cy - this.radius, cc, cc );
// Draw gravity area( if requested )
//
if( DRAW_GRAVITY_AREA ){
ctx.save();
g = ctx.createRadialGradient(cx, cy, 0, cx, cy, this.gravityRadius);
g.addColorStop( 0, 'rgba(0, 0, 0, 0.0)' );
g.addColorStop( 1, 'rgba(0, 0, 0, 0.03)' );
ctx.fillStyle = g;
ctx.beginPath();
ctx.arc( cx, cy, this.gravityRadius, 0, Math.PI * 2, true );
ctx.closePath();
ctx.fill();
ctx.restore();
}
},
step: function(){
// Calculate draw positions
//
this.cx = (this.x - scrollX);
this.cy = (this.y - scrollY);
this.visible = !(this.cx < -this.radius || this.cx > (WIDTH + this.radius) || this.cy < -this.radius || this.cy > (HEIGHT + this.radius));
// Update positions of only visible bodies
//
if( this.visible ){
this.x += this.velocityX;
this.y += this.velocityY;
}
},
addShield: function( time ){
var t = this;
// Multiple shields are not allowed for now
//
if( this.shield ) return;
// Set properties
//
this.shield = 1;
this.shieldEnd = now + time;
this.shieldDuration = time;
// Set clear timeout
//
this.shieldTimer = setTimeout(function(){
t.shield = t.shieldEnd = t.shieldDuration = 0;
t.shieldTimer = null;
}, time );
},
startShield: function(){
var t = this, reduce;
this.shieldTimer = setInterval(reduce = function(){
t.setRadius( t.radius - t.radius/40 - 0.1 );
t.shield = 1;
t.shieldEnd = now + 10000;
t.shieldDuration = 10000;
}, 250 );
reduce();
},
stopShield: function(){
if( this.shield ){
clearInterval(this.shieldTimer);
this.shield = this.shieldEnd = this.shieldDuration = 0;
this.shieldTimer = null;
}
},
impulse: function( angle, power ){
this.velocityX /= VELOCITY_REDUCE_ON_IMPULSE;
this.velocityY /= VELOCITY_REDUCE_ON_IMPULSE;
this.velocityX += Math.cos( DEGREE * angle ) * power;
this.velocityY -= Math.sin( DEGREE * angle ) * power;
this.setRadius( this.radius - power/RADIUS_REDUCE_TO_POWER );
if( power/MAX_POWER > MIN_POWER_FOR_ACCELERATION ){
this.addAcceleration( (power/MAX_POWER) );
}
},
applyGravity: function(){
for( var ent, i=-1, j=bodies.length, dx, dy, rD, rS; ++i<j; ){
// NOTE: do not apply gravity to invisible bodies
//
if( (ent = bodies[i]) === this || !ent.visible ) continue;
if( circlesCollision( ent.x, ent.y, ent.radius, this.x, this.y, this.gravityRadius) ){
if( ent.radius < this.radius ){
dx = (this.x - ent.x);
dy = (this.y - ent.y);
rD = (this.radius - ent.radius);
rS = (this.radius + ent.radius);
ent.velocityX += (dx*rD/GRAVITY_FACTOR);
ent.velocityY += (dy*rD/GRAVITY_FACTOR);
}
}
}
},
applyReduce: function(){
for( var ent, i=-1, j=bodies.length, cRadius = this.shield ? this.shieldRadius : this.radius, dx, dy, dist, radius; ++i<j; ){
if( (ent = bodies[i]) === this ) continue;
if( circlesCollision( ent.x, ent.y, ent.shield ? ent.shieldRadius : ent.radius, this.x, this.y, cRadius ) ){
if( ent.radius <= this.radius ){
// If one of the bodies have shield, destroy
// one without. If both are protected do nothing.
//
if( ent.shield ){
if( !this.shield ){
addExplosion( this.cx, this.cy, this.radius/4, getExplosionParticle() );
this.setRadius(0);
}
return;
} else if( this.shield ){
addExplosion( ent.cx, ent.cy, ent.radius/4, getExplosionParticle() );
ent.setRadius(0);
continue;
}
radius = ent.radius;
dist = Math.sqrt( (dx = this.x - ent.x)*dx + (dy = this.y - ent.y)*dy );
// Reduce small body
//
ent.setRadius( dist - this.radius );
// Do not allow bodies with radius smaller
// than minimum set in configuration
//
if( ent.radius < MIN_BODY_RADIUS ) ent.setRadius(0);
// Increase bigger body
//
this.setRadius( this.radius + (radius - ent.radius)/RADIUS_ABSORB );
}
}
}
},
addAcceleration: function( k, stop ){
var
size = this.radius*3*k,
maxAngle = 2*Math.PI,
img = getExplosionParticle(),
dist = size*2,
frames = 60,
interval = 50,
postExplosions = 4,
t = this,
i = -1, j = -1,
angle, sin, cos, part;
for( ;++i<=size; ){
angle = maxAngle*(i/size);
sin = Math.sin(angle);
cos = Math.cos(angle);
part = {
pos: 0,
img: img,
x: [],
y: []
};
for( j=-1; ++j<frames; ){
part.x.push( scrollX + this.cx + cos*dist*(j/frames) );
part.y.push( scrollY + this.cy + sin*dist*(j/frames) );
}
particles.push( part );
}
if( !stop ){
for( i=0; ++i<=postExplosions; ){
setTimeout((function(i){
return function(){
t.addAcceleration( k/i, true );
};
})(i), interval*i );
}
}
}
};
//////////////////////////////////////////////////
// START THE GAME
//////////////////////////////////////////////////
main();
//////////////////////////////////////////////////
function main(){
// Initializations
//
DOMInit();
playerInit();
bodiesInit();
// Show layers
//
show( layers.start );
show( layers.message );
show( layers.game );
}
//////////////////////////////////////////////////
// INITIALIZATION FUNCTIONS
//////////////////////////////////////////////////
function DOMInit(){
// Locals
//
var layer, cc;
// Fix wrapper styles
//
wrapper.style.width = WIDTH + 'px';
wrapper.style.height = HEIGHT + 'px';
wrapper.style.overflow = 'hidden';
wrapper.style.position = 'fixed';
wrapper.style.top = '0px';
wrapper.style.left = '0px';
wrapper.style.background = "transparent url(data:image/jpeg;base64,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) repeat top left";
wrapper.style.webkitBackfaceVisibility = "hidden";
wrapper.style.webkitPerspective = "1000";
// Prevent user select
//
wrapper.unselectable = 'no';
wrapper.onselectstart="return false;";
wrapper.style.webkitUserSelect = "none";
wrapper.style.mozUserSelect = "none";
// Set layers properties and styles
//
for( layer in layers ){
if( layers.hasOwnProperty(layer) ){
cc = layers[layer];
cc.width = WIDTH;
cc.height = HEIGHT;
cc.style.position = "absolute";
cc.style.top = "0px";
cc.style.left = "0px";
cc.style.display = "none";
cc.style.width = "100%";
cc.style.height = "100%";
cc.style.webkitBackfaceVisibility = "hidden";
cc.style.webkitPerspective = "1000";
cc.unselectable = 'no';
cc.onselectstart="return false;";
wrapper.appendChild(cc);
}
}
// Init layers
//
initStartLayer();
initEndLayer();
// Remove scroll
//
document.documentElement.style.overflow = 'hidden';
// Fix layout each time when visible area dimensions are changed
//
window.addEventListener( 'orientationchange', fixLayout, false );
window.addEventListener( 'resize', fixLayout, false );
// Prevent page scroll.
//
document.body.addEventListener('touchmove', function(e){
e.preventDefault();
}, false);
// Add game to DOM
//
document.documentElement.appendChild(wrapper);
}
function initStartLayer(){
var layer = layers.start,
cc = layer.getContext('2d');
// NOTE: this layer will be shown only once,
// all drawing should be here
//
drawStartLayer();
layer.addEventListener('click', function(e){
hide( layer );
startGame();
}, false);
}
function initEndLayer(){
var layer = layers.end,
ctx = layer.getContext('2d');
layer.addEventListener('click', function(e){
var offsetX = e.pageX - wrapper.offsetLeft,
offsetY = e.pageY - wrapper.offsetTop;
if( ui.share.isClicked(offsetX, offsetY) ){
ui.share.action();
return false
}
if( ui.tweet.isClicked(offsetX, offsetY) ){
ui.tweet.action();
return false
}
hide( layer );
restartGame();
return false;
}, false);
}
function playerInit(){
// Locals
//
var dx, dy, dist, sin, angle;
// Create player
//
player = new Circle();
// Set player to be in the middle of the stage
//
player.setRadius( PLAYER_START_RADIUS );
player.x = player.startX = WIDTH/2;
player.y = player.startY = HEIGHT/2;
// Load player model
//
player.model = getPlayerCanvas();
// Player controls
//
layers.message.addEventListener('click', function(e){
// NOTE: do not use e.offsetX and e.offsetY they are
// so buggy on mobile.
//
var offsetX = e.pageX - wrapper.offsetLeft,
offsetY = e.pageY - wrapper.offsetTop;
if( ui.shield.isClicked( offsetX, offsetY ) ){
ui.shield.action();
return false;
}
dx = offsetX + scrollX - player.x;
dy = offsetY + scrollY - player.y;
// Calculate distance between mouse position and
// player`s circle center.
//
dist = Math.sqrt( dx*dx + dy*dy );
// Impulse angle
//
sin = Math.abs(dy)/dist;
angle = Math.asin(sin) * 180 / Math.PI;
// if( dx > 0 && dy < 0 ){ } else
//
if( dx < 0 && dy < 0 ){ // top left
angle = 180 - angle;
} else if( dx < 0 && dy > 0 ){
angle = 270 - angle;
} else if( dx > 0 && dy > 0 ){
angle = 360 - angle;
}
// Apply impulse on player
player.impulse( angle, dist/DIAGONAL*MAX_POWER );
// Prevent select
//
e.preventDefault();
});
}
function bodiesInit(){
// Add some circles
//
for( i=-1; ++i<BODIES_LENGTH; ) bodies.push(addBody());
bodies.push(player);
}
function drawStartLayer(){
var layer = layers.start,
cc = layer.getContext('2d');
cc.clearRect( 0, 0, WIDTH, HEIGHT );
cc.fillStyle = 'rgba(0,0,0,0.1)';
cc.strokeStyle = 'rgba(0,0,0,0.5)';
cc.fillRect( WIDTH/2 - 250, HEIGHT/2 - 150, 500, 300 );
cc.strokeRect( WIDTH/2 - 252, HEIGHT/2 - 152, 504, 304 );
cc.fillStyle = '#fff';
cc.strokeStyle = '#666';
cc.lineWidth = 0.5;
cc.shadowOffsetX = 0;
cc.shadowOffsetY = 0;
cc.shadowBlur = 10;
cc.shadowColor = 'rgba(0,0,0,0.3)';
cc.fillRect( WIDTH/2 - 240, HEIGHT/2 - 140, 480, 280 );
cc.strokeRect( WIDTH/2 - 240, HEIGHT/2 - 140, 480, 280 );
cc.shadowOffsetX = 1;
cc.shadowOffsetY = 1;
cc.shadowBlur = 0;
cc.font = 'bold 33px Verdana';
cc.textBaseline = "middle";
cc.textAlign = "center";
cc.fillStyle = '#EE3C7E';
cc.fillText( "Galaxy Trip", WIDTH/2, HEIGHT/2 - 80, WIDTH/2 );
cc.fillStyle = '#333';
cc.fillText( "Click to start game", WIDTH/2, HEIGHT/2 + 60, WIDTH/2 );
cc.drawImage(getPlayerCanvas(), WIDTH/2 - 30, HEIGHT/2 - 40)
}
//////////////////////////////////////////////////
// GAME FUNCTIONS
//////////////////////////////////////////////////
function startGame(){
gameLoop();