Talking about Concentration game, Game development, HTML5, Javascript and Users contributions.
Some days ago I showed you the basics on PIXI.js by making a simple yet complete Concentration game.
Later, a reader called Bence Dobos improved it by adding some animations made with TweenJS library.
TweenJS is a simple tweening library for use in Javascript. It was developed to integrate well with the EaselJS library, but is not dependent on or specific to it. It supports tweening of both numeric object properties & CSS style properties. The API is simple but very powerful, making it easy to create complex tweens by chaining commands.
By adding different types of tweens according to game events (placing tiles, turning tiles, removing tiles), Bence improved the visual appeal of the game.
Try it by yourself:
Click on tiles and try to match them.
And here is the source code with new lines highlighted:
<!DOCTYPE HTML>
<html>
<head>
<title>PIXI Concentration</title>
<style>
body {
margin: 0;
padding: 0;
background-color: #885500;
}
</style>
<script src="pixi.dev.js"></script>
<script src="tweenjs.js"></script>
</head>
<body>
<script>
// first tile picked up by the player
var firstTile=null;
// second tile picked up by the player
var secondTile=null;
// can the player pick up a tile?
var canPick=true;
// create an new instance of a pixi stage with a grey background
var stage = new PIXI.Stage(0x888888);
// create a renderer instance width=640 height=480
var renderer = PIXI.autoDetectRenderer(640,480);
// add the renderer view element to the DOM
document.body.appendChild(renderer.view);
// importing a texture atlas created with texturepacker
var tileAtlas = ["images.json"];
// create a new loader
var loader = new PIXI.AssetLoader(tileAtlas);
// create an empty container
var gameContainer = new PIXI.DisplayObjectContainer();
// add the container to the stage
stage.addChild(gameContainer);
// use callback
loader.onComplete = onTilesLoaded
//begin load
loader.load();
function onTilesLoaded(){
// choose 24 random tile images
var chosenTiles=new Array();
while(chosenTiles.length<48){
var candidate=Math.floor(Math.random()*44);
if(chosenTiles.indexOf(candidate)==-1){
chosenTiles.push(candidate,candidate)
}
}
// shuffle the chosen tiles
for(i=0;i<96;i++){
var from = Math.floor(Math.random()*48);
var to = Math.floor(Math.random()*48);
var tmp = chosenTiles[from];
chosenTiles[from]=chosenTiles[to];
chosenTiles[to]=tmp;
}
// place down tiles
for(i=0;i<8;i++){
for(j=0;j<6;j++){
// new sprite
var tile = PIXI.Sprite.fromFrame(chosenTiles[i*6+j]);
// buttonmode+interactive = acts like a button
tile.buttonMode=true;
tile.interactive = true;
// is the tile selected?
tile.isSelected=false;
// set a tile value
tile.theVal=chosenTiles[i*6+j];
// place the tile
tile.position.x = Math.random()*600;
tile.position.y = -Math.random()*100 - 100;
tile.rotation = Math.random()*2*3.14;
// paint tile black
tile.tint = 0x000000;
// set it a bit transparent (it will look grey)
tile.alpha=0.5;
new TWEEN.Tween(tile)
.to({x: 7+i*80, y: 7+j*80, rotation:0}, 2400 + Math.random()*1200)
.easing(TWEEN.Easing.Elastic.Out)
.start();
// add the tile
gameContainer.addChild(tile);
// mouse-touch listener
tile.mousedown = tile.touchstart = function(data){
// can I pick a tile?
if(canPick) {
// is the tile already selected?
if(!this.isSelected){
new TWEEN.Tween(this)
.to({width:0.0, x:"+32"}, 300)
.easing(TWEEN.Easing.Linear.None).onComplete(function() {
this.tint = 0xffffff;
})
.chain(new TWEEN.Tween(this)
.to({alpha: 1.0, width:64, x:"-32"}, 300)
.easing(TWEEN.Easing.Linear.None))
.start();
// set the tile to selected
this.isSelected = true;
// show the tile
//this.tint = 0xffffff;
//this.alpha = 1;
// is it the first tile we uncover?
if(firstTile==null){
firstTile=this
}
// this is the second tile
else{
secondTile=this
// can't pick anymore
canPick=false;
// did we pick the same tiles?
if(firstTile.theVal==secondTile.theVal){
// wait a second then remove the tiles and make the player able to pick again
setTimeout(function(){
new TWEEN.Tween(firstTile)
.to({width:"+100", height:"+100", x:"-50", y:"-50", alpha:0.0}, 600)
.easing(TWEEN.Easing.Linear.None)
.onComplete(function() {
gameContainer.removeChild(this);
})
.start();
new TWEEN.Tween(secondTile)
.to({width:"+100", height:"+100", x:"-50", y:"-50", alpha:0.0}, 600)
.easing(TWEEN.Easing.Linear.None).onComplete(function() {
gameContainer.removeChild(this);
canPick=true;
})
.start();
firstTile=null;
secondTile=null;
},1000);
}
// we picked different tiles
else{
// wait a second then cover the tiles and make the player able to pick again
setTimeout(function(){
firstTile.isSelected=false
secondTile.isSelected=false
new TWEEN.Tween(firstTile)
.to({alpha: 0.5, width:0.0, x:"+32"}, 150)
.easing(TWEEN.Easing.Linear.None).onComplete(function() {
this.tint = 0x000000;
})
.chain(new TWEEN.Tween(firstTile)
.to({width:64, x:"-32"}, 150)
.easing(TWEEN.Easing.Linear.None))
.start();
new TWEEN.Tween(secondTile)
.to({alpha: 0.5, width:0.0, x:"+32"}, 150)
.easing(TWEEN.Easing.Linear.None)
.onComplete(function() {
this.tint = 0x000000;
canPick=true;
})
.chain(new TWEEN.Tween(secondTile)
.to({width:64, x:"-32"}, 150)
.easing(TWEEN.Easing.Linear.None))
.start();
firstTile=null;
secondTile=null;
},1000);
}
}
}
}
}
}
}
requestAnimFrame(animate);
}
function animate() {
requestAnimFrame(animate);
TWEEN.update();
renderer.render(stage);
}
</script>
</body>
</html>
As usual you can also download the entire project, libraries included.
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