게임이 맘에 들지 않았지만 물리엔진으로 구동되는 작은 Phaser 프로토 타입을 개발했습니다.
게임은 간단하지만 다음과 같은 흥미로운 기능을 포함합니다.
* P2 물리학
* 중력과 배상
* 연락 청취자
* 정적 및 동적 몸체
다음은 완전히 주석 처리 된 소스 코드입니다. 이해하기 쉽고 개선하기 쉽습니다.
window.onload = function() {
var game = new Phaser.Game(320,480,Phaser.CANVAS,"",{preload:onPreload, create:onCreate, update:onUpdate});
// the hero!!
var hero;
// an array which will contain all game items. Used just to be sure items will be placed
// not so close to each others
var gameItems=[];
// game text displaying floor,level, lives and so on
var gameText = "";
// group which will contain all level assets
var levelGroup;
// starting level
var level=1;
// starting experience
var exp=0;
// starting lives
var lives=3;
// starting floor
var floor=1;
// starting gold
var gold=0;
function onPreload() {
// preloading images
game.load.image("skull","assets/skull.png");
game.load.image("coin","assets/coin.png");
game.load.image("hero","assets/hero.png");
}
// going fullscreen
function goFullScreen(){
game.scale.pageAlignHorizontally = true;
game.scale.pageAlignVertically = true;
game.scale.scaleMode = Phaser.ScaleManager.SHOW_ALL;
game.scale.setScreenSize();
}
function onCreate() {
goFullScreen();
// dark grey background color
game.stage.backgroundColor = '#2d2d2d';
// starting P2 physics system
game.physics.startSystem(Phaser.Physics.P2JS);
// setting a soft gravity...
game.physics.p2.gravity.y = 200;
// ... but a high restitution
game.physics.p2.restitution = 0.9;
// level creation
createLevel();
// listener for input down, to call addHero when triggered
game.input.onDown.add(addHero, this);
// setting physics world boundaries, only left and right (the first two "true")
game.physics.p2.setBoundsToWorld(true, true, false, false, false);
// adding the HUD text
gameText = game.add.text(0,0, "",{font:"normal 12px arial",fill: "#ffffff"})
// updating the text
updateText();
}
function createLevel(){
// level creation is very easy, first we add a group
levelGroup = game.add.group();
// the array of items starts as an empty array
gameItems = [];
// placing 18 items per level
for(var i=0;i<18;i++){
// skulls will be placed more and more often
if(Math.random()<0.6+(level/1000)){
gameItems[i] = game.add.sprite(0,0,"skull");
gameItems[i].name = "skull";
}
// adding coins
else{
gameItems[i] = game.add.sprite(0,0,"coin");
gameItems[i].name = "coin";
}
// adding the last created item to levelgroup
levelGroup.add(gameItems[i]);
// setting its registration point in the middle
gameItems[i].anchor.setTo(0.5,0.5);
// keep moving the item until id does not ovelap with other items
do{
gameItems[i].x = Math.random()*300+10;
gameItems[i].y = Math.random()*360+100;
} while(itemsOverlap());
// enabling item to react to physics
game.physics.p2.enable(gameItems[i]);
// setting it as a 24 pixels radius circle
gameItems[i].body.setCircle(24);
// setting items as static
gameItems[i].body.static=true;
}
}
function addHero(){
// once the hero is added, remove the listener
game.input.onDown.remove(addHero, this);
// placing hero sprite x = horizontal coordinate of your input, y = outside the stage at the top
hero = game.add.sprite(game.input.worldX,-50,"hero");
// adding the hero to the group
levelGroup.add(hero);
// enabling the hero to react to physics
game.physics.p2.enable(hero);
// listener for hero contacts, heroHit to be called when triggered
hero.body.onBeginContact.add(heroHit, this);
}
function heroHit(body){
// if the hero hits an ACTUAL body (not a world boundary)
if(body){
switch(body.sprite.name){
// if it's a coin, remove the body, update the score
case "coin":
gold+=(level*floor);
body.sprite.kill();
break;
// if it's a skull, remove the body, update experience...
case "skull":
// ... but ONLY if the hero is above the skull
if(hero.y<body.y){
body.sprite.kill();
exp+=1;
if(exp>level*level/2){
level++;
lives++;
exp=0;
}
}
else{
// otherwise decrease the lives and show a bit of "blood"
lives--;
game.stage.backgroundColor = "#ff0000";
}
break;
}
}
else{
// if the hero do not hit an ACTUAL body (that is it hit a world boundary)
// decrease the lives and show a bit of "blood"
lives--;
game.stage.backgroundColor = "#ff0000";
}
if(lives==0){
// no lives = game over
hero.kill();
}
// updating HUD text
updateText();
}
function updateText(){
// just writing a string
gameText.setText("Floor: "+floor+" - Lives: "+lives+" - Level: "+level+" - Exp: "+exp+" - Gold: "+gold);
}
function onUpdate() {
// set background color to dark grey. Should be optimized
game.stage.backgroundColor = "#2d2d2d";
// if the hero is in game...
if(hero){
// and its y position is more than 500 (outside the bottom of the screen)
if(hero.y>500){
// preparing for next level
hero.y=0;
levelGroup.destroy(true);
game.input.onDown.add(addHero, this);
floor++;
lives++;
updateText();
createLevel();
}
}
}
// just a function to see if the latest item overlaps with previous ones
function itemsOverlap(){
for(var i=0;i<gameItems.length-1;i++){
var distance = manhattanDistance(gameItems[i],gameItems[gameItems.length-1]);
if(distance<50){
return true;
}
}
return false;
}
// manhattan distance.
function manhattanDistance(from,to){
return Math.abs(from.x-to.x)+Math.abs(from.y-to.y)
}
};
소스 코드를 다운로드하십시오.
댓글 없음:
댓글 쓰기