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spaceinvaders.php
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spaceinvaders.php
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<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="util/jcanvas.min.js"></script>
<script>
// Cross-browser support for requestAnimationFrame
var w = window;
requestAnimationFrame = w.requestAnimationFrame
|| w.webkitRequestAnimationFrame
|| w.msRequestAnimationFrame
|| w.mozRequestAnimationFrame;
var h = $(w).height() - 30;
var hF = h / 500;
var Direction = {
LEFT: -1,
NONE: 0,
RIGHT: 1
}
var EnemyType = {
FIRST: 0,
SECOND: 1,
THIRD: 2,
UFO: 3
}
var dir = Direction.NONE;
var shipX = 250 * hF;
var shipY = 450 * hF;
var shotsFired = 0;
var canShoot = Date.now();
var shotCooldown = 650;
var shotSpeed = 750 * hF;
var speed = hF * 135;
var lastUpdate = Date.now();
var shots = [];
function shot(x, y){
this.x = x;
this.y = y;
shots[shots.length] = this;
}
var enemies = [[],[],[],[],[],[],[],[],[],[],[]];
var enemySpeed = 5 * hF;
var enemiesAlive = 55;
var eSpeedCoeff = 1;
function enemy(x, y, type, alive){
this.x = x;
this.y = y;
this.type = type;
this.alive = alive;
}
//Enemy reset
function resetEnemies(){
corner = {x: 50 * hF, y: 200 * hF};
enemiesAlive = 55;
rOffLeft = 0;
rOffRight = 0;
offBot = 0;
var n;
var k;
var posX;
var posY;
var eWidth = 25;
var eRatio;
for (n = 0; n < 11; n++){
for (k = 0; k < 5; k++){
posX = n + 1;
posY = k + 1;
switch (k) {
case 0:
eRatio = 76 / 120;
enemies[n][k] = new enemy(posX, posY, EnemyType.FIRST, true);
$("#c").drawImage({
name: "e" + n + k,
source: "spaceinvaders/images/a1n.png",
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - ((eWidth * eRatio + 17) * hF * k),
width: eWidth * hF,
height: eWidth * eRatio * hF,
layer: true
});
break;
case 1:
eRatio = 76 / 120;
enemies[n][k] = new enemy(posX, posY, EnemyType.FIRST, true);
$("#c").drawImage({
name: "e" + n + k,
source: "spaceinvaders/images/a1n.png",
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - ((eWidth * eRatio + 17) * hF * k),
width: eWidth * hF,
height: eWidth * eRatio * hF,
layer: true
});
break;
case 2:
eRatio = 68 / 96;
enemies[n][k] = new enemy(posX, posY, EnemyType.SECOND, true);
$("#c").drawImage({
name: "e" + n + k,
source: "spaceinvaders/images/a2n.png",
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - ((eWidth * eRatio + 17) * hF * k),
width: eWidth * hF,
height: eWidth * eRatio * hF,
layer: true
});
break;
case 3:
eRatio = 68 / 96;
enemies[n][k] = new enemy(posX, posY, EnemyType.SECOND, true);
$("#c").drawImage({
name: "e" + n + k,
source: "spaceinvaders/images/a2n.png",
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - ((eWidth * eRatio + 17) * hF * k),
width: eWidth * hF,
height: eWidth * eRatio * hF,
layer: true
});
break;
case 4:
eRatio = 70 / 70;
enemies[n][k] = new enemy(posX, posY, EnemyType.THIRD, true);
$("#c").drawImage({
name: "e" + n + k,
source: "spaceinvaders/images/a3n.png",
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - (((eWidth - 7) * eRatio + 17) * hF * k),
width: (eWidth - 5) * hF,
height: (eWidth - 5) * eRatio * hF,
layer: true
});
break;
}
}
}
}
//Redraw enemies
function drawEnemies(alt){
var n;
var k;
var posX;
var posY;
var eWidth = 25;
var eRatio;
var source;
for (n = 0; n < 11; n++){
for (k = 0; k < 5; k++){
posX = n + 1;
posY = k + 1;
if (enemies[n][k].alive){
switch (k) {
case 0:
case 1:
if (alt) { source = "spaceinvaders/images/a1a.png";}
else { source = "spaceinvaders/images/a1n.png";}
eRatio = 76 / 120;
$("#c").setLayer("e" + n + k, {
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - ((eWidth * eRatio + 17) * hF * k),
source: source
});
break;
case 2:
case 3:
if (alt) {source = "spaceinvaders/images/a2a.png";}
else { source = "spaceinvaders/images/a2n.png";}
eRatio = 68 / 96;
$("#c").setLayer("e" + n + k, {
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - ((eWidth * eRatio + 17) * hF * k),
source: source
});
break;
case 4:
if (alt){ source = "spaceinvaders/images/a3a.png";}
else { source = "spaceinvaders/images/a3n.png";}
eRatio = 70 / 70;
$("#c").setLayer("e" + n + k, {
x: corner.x + ((eWidth + 10) * hF * n),
y: corner.y - (((eWidth - 7) * eRatio + 17) * hF * k),
source: source
});
break;
}
} else {
$("#c").removeLayer("e" + n + k);
}
}
}
}
//Main loop
var over = false;
function main(){
if (!over){
now = Date.now();
elapsed = now - lastUpdate;
update(elapsed);
lastUpdate = now;
requestAnimationFrame(main);
}
}
var lastAlt = Date.now();
var isAlt = false;
var bombIntFact = 350
var bombTime = Date.now() + Math.random() * bombIntFact;
var bombsToRemove = [];
var bTRTimers = [];
var bombSpeed = 100 * hF;
var pause = false;
var offBot = 0;
var ufoTimer = (Math.random() * 5000 + 10000) + Date.now();
var ufoExists = false;
var alerted = false;
var firstUpdate = true;
//Position updater
function update(modifier){
if (modifier > (100) && !firstUpdate && !alerted){
alerted = true;
window.alert("Your browser appears to be running slowly. This can cause bugs. If they occur try refreshing or opening a new browser tab.");
}
firstUpdate = false;
if (pause) {
bombTime = now + Math.random() * bombIntFact;
return; }
if (!pause && now > bombTime){
dropBomb();
bombTime += 10 * Math.random() * bombIntFact;
}
if (ufoTimer < now){
$("#c").drawImage({
name: "ufo",
source: "spaceinvaders/images/ufo.png",
x: 500 * hF,
y: 25 * hF,
width: 40 * hF,
height: 40 * hF * 68/140,
layer: true
});
ufoExists = true;
}
if (ufoExists){
var newX = $("#c").getLayer("ufo").x -= (50 * hF * modifier / 1000);
$("#c").setLayer("ufo", {x: newX});
if (newX <= 0){
$("#c").removeLayer("ufo");
ufoExists = false;
ufoTimer = (Math.random() * 10000 + 5000) + now;
}
}
if (enemySpeed > 0){
enemySpeed += 0.75 * hF * modifier / 1000;
} else {
enemySpeed -= 0.75 * hF * modifier / 1000;
}
switch(dir){
case Direction.LEFT:
if ((shipX - (20 * hF)) >= 0){
shipX -= speed * modifier / 1000;
$("#c").setLayer("ship", {
x: shipX,
y: shipY,
})
} else {
dir = Direction.NONE;
}
break;
case Direction.NONE:
break;
case Direction.RIGHT:
if ((shipX + (20 * hF)) <= (500 * hF)){
shipX += speed * modifier / 1000;
$("#c").setLayer("ship", {
x: shipX,
y: shipY,
})
} else {
dir = Direction.NONE;
}
break;
}
if (willShoot && (now > canShoot)){
canShoot = now + shotCooldown;
shoot(shipX, shipY);
}
willShoot = false;
var p;
var bombDif = bombSpeed * modifier / 1000;
for (p = 0; p < bombs.length; p++){
var newY = $("#c").getLayer(bombs[p]).y + bombDif;
if (newY <= 500 * hF){
$("#c").setLayer(bombs[p], {
y: newY
}).drawLayers();
var thisB = $("#c").getLayer(bombs[p]);
var ship = $("#c").getLayer("ship");
if (testColl(ship.x, ship.y, (ship.width - (317 * hF)), ship.height,
thisB.x, thisB.y, thisB.width, thisB.height) ||
testColl(ship.x, ship.y, (ship.width), (ship.height - ship.height),
thisB.x, thisB.y, thisB.width, thisB.height) ||
testColl(ship.x, ship.y, (ship.width), (ship.height - ship.height),
thisB.x, thisB.y, thisB.width, thisB.height)){
death();
$("#c").setLayer(bombs[p], {
width: 10 * hF,
height: 10 * hF * 228 / 150,
source: "spaceinvaders/images/explosion1.png"
});
bombsToRemove[bombsToRemove.length] = bombs[p];
bTRTimers[bTRTimers.length] = now + 100;
bombs.splice(p,1);
break;
}
var q;
for (q = 0; q < shots.length; q++){
var thisShot = $("#c").getLayer(shots[q]);
if (testColl(thisShot.x, thisShot.y, thisShot.width, thisShot.height,
thisB.x, thisB.y, thisB.width, thisB.height)){
$("#c").setLayer(bombs[p], {
width: 10 * hF,
height: 10 * hF * 228 / 150,
source: "spaceinvaders/images/explosion1.png"
});
bombsToRemove[bombsToRemove.length] = bombs[p];
bTRTimers[bTRTimers.length] = now + 100;
bombs.splice(p,1);
break;
}
}
} else {
$("#c").removeLayer(bombs[p]);
bombs.splice(p,1);
}
}
var c;
for (c = 0; c < bombsToRemove.length; c++){
if (bTRTimers[c] < now){
$("#c").removeLayer(bombsToRemove[c]);
bombsToRemove.splice(c,1);
bTRTimers.splice(c,1);
}
}
var i;
var shotDif = shotSpeed * modifier / 1000;
var n;
var k;
var j;
for (i = 0; i<shots.length; i++){
var thisS = $("#c").getLayer(shots[i]);
var broken = false;
if (ufoExists){
var ufoT = $("#c").getLayer("ufo");
if (testColl(ufoT.x, ufoT.y, ufoT.width, ufoT.height,
thisS.x, thisS.y, thisS.width, thisS.height)){
$("#c").removeLayer("ufo");
ufoExists = false;
ufoTimer = (Math.random() * 10000 + 5000) + now;
score += 100;
$("#c").setLayer("score", {text: "Score: " + score});
$("#c").removeLayer(shots[i]);
shots.splice(i,1);
broken = true;
}
}
for (n = 0; n < 11; n++){
for (k = 0; k < 5; k++){
if (enemies[n][k].alive){
var thisE = $("#c").getLayer("e" + n + k);
if (testColl(thisS.x, thisS.y, thisS.width, thisS.height,
thisE.x, thisE.y, thisE.width, thisE.height)){
$("#c").removeLayer(shots[i]);
shots.splice(i,1);
$("#c").removeLayer("e" + n + k);
enemies[n][k].alive = false;
enemiesAlive--;
switch (enemies[n][k].type){
case 0:
score += 10;
break;
case 1:
score += 20;
break;
case 2:
score += 30;
break;
}
$("#c").setLayer("score", {text: "Score: " + score});
var i;
var j;
for (i = 0; i < 11; i++){
var removeRow = true;
for (j = 0; j < 5; j++){
if (enemies[i][j].alive){
removeRow = false;
console.log("test");
}
}
if (removeRow){
if (i == rOffLeft){
rOffLeft++;
}
if (i == (10 - rOffRight)){
rOffRight++;
}
}
}
broken = true;
break;
}
}
}
if (broken){ break;
broken = false;}
}
var liveCounters = [0,0,0,0,0]
var n;
var k;
for (n = 0; n < 11; n++){
for (k = 0; k < 5; k++){
if (enemies[n][k].alive){
liveCounters[k]++;
}
}}
var u;
for (u = offBot; u < 5; u++){
if (liveCounters[u] == 0){
offBot++;
break;
}
}
if (broken != true){
$("#c").getLayer(shots[i]).y -= shotDif;
var newY = $("#c").getLayer(shots[i]).y;
if (newY > 0){
$("#c").setLayer(shots[i], {
y: newY
}).drawLayers();
} else {
$("#c").removeLayer(shots[i]);
shots.splice(i,1);
}
}
}
if ((corner.x + ((-12.5 + (rOffLeft * 35)) * hF)) <= 0){
eSpeedCoeff *= -1;
// corner.x += -((corner.x + (((enemySpeed * eSpeedCoeff * 2 * modifier / 1000) + (rOffLeft * 35) - 12.5) * hF)));
corner.y += (17 * hF);
}
if ((corner.x + (10 * 35 + 12.5 - (rOffRight * 35)) * hF) >= (500 * hF)){
eSpeedCoeff *= -1;
//corner.x += ((500 * hF) - (corner.x + (10 * 35 + (enemySpeed * eSpeedCoeff * 2 * modifier / 1000) - (rOffRight * 35)) * hF));
corner.y += (17 * hF);
}
corner.x += eSpeedCoeff * enemySpeed * hF * modifier / 1000;
//enemySpeed = eSpeedCoeff * (925 / ((4 * enemiesAlive) - 35));
if ((now - lastAlt) > 500){
if (isAlt){
isAlt = false;
} else {
isAlt = true;
}
lastAlt = now;
}
drawEnemies(isAlt);
$("#c").drawLayers();
switch (offBot){
case 0:
difOffY = 0;
break;
case 1:
difOffY = hF * 155 / 6;
break;
case 2:
difOffY = hF * 155 / 3;
break;
case 3:
difOffY = hF * ((155 / 3) + (700 / 24) + 15);
break;
case 4:
difOffY = hF * ((155 / 3) + (700 / 12) + 15);
break;
}
if (enemiesAlive == 0){
gameOver(true);
}
if ((corner.y + (hF * 12.5) - difOffY) > 450 * hF){
gameOver(false);
}
}
$("#c").ready(function(){
$("#start").click(function(){
over = false;
pause = false;
$("#c").removeLayers();
$("#start").hide();
$("#c").attr("height", 500 * hF);
$("#c").attr("width", 500 * hF);
var width = 40 * hF;
var height = width * 79 / 114;
$("#c").drawImage({
name: "ship",
source: "spaceinvaders/images/ship.png",
x: shipX,
y: shipY,
width: width,
height: height,
layer: true
});
resetEnemies();
lives = 3;
drawLives();
drawScore();
main();
});
});
var willShoot = false;
$(document).keydown(function(event){
var key = event.which;
switch (key) {
case 37:
dir = Direction.LEFT;
break;
case 39:
dir = Direction.RIGHT;
break;
case 32:
willShoot = true;
break;
case 27:
if (pause){ pause = false; }
else { pause = true; }
}
});
$(document).keyup(function(event){
if((event.which == 37 && dir == Direction.LEFT) || (event.which == 39 && dir == Direction.RIGHT)){
dir = Direction.NONE;
}
});
var shots = [];
function shoot(x, y){
shotsFired++;
var width = 2 * hF;
var height = width * 400 / 150;
var name = "shot" + shotsFired;
shots[shots.length] = name;
$("#c").drawImage({
name: name,
source: "spaceinvaders/images/shot.png",
x: x,
y: y - (10 * hF),
width: width,
height: height,
layer: true
});
}
function testColl(x1, y1, w1, h1, x2, y2, w2, h2){
if((x1 + w1 / 2) >= (x2 - w2 / 2)
&& (x1 - w1 / 2) <= (x2 + w2 /2)
&& (y1 + h1 / 2) >= (y2 - h2 / 2)
&& (y1 - h1 / 2) <= (y2 + h2 / 2)) {
return true;
} else {
return false;
}
}
$(w).blur(function(){ pause = true; });
$(w).focus(function(){ pause = false; });
var bombs = [];
var bombsDropped = 0;
function dropBomb(){
bombsDropped++;
var alienX = Math.round(Math.random() * 10);
var k;
for (k = 0; k < enemies[alienX].length; k++){
if (enemies[alienX][k].alive){
thisE = $("#c").getLayer("e" + alienX + k);
var width = 5 * hF;
var height = width * 228 / 99;
var name = "bomb" + bombsDropped;
bombs[bombs.length] = name;
$("#c").drawImage({
name: name,
source: "spaceinvaders/images/ebomb.png",
x: thisE.x,
y: thisE.y,
width: width,
height: height,
layer: true
});
break;
}
}
}
var lives = 3;
function drawLives(){
var lifeW = 20 * hF;
var k;
for (k = 1; k <= 3; k++){
var newX = k * (lifeW + 10);
var height = lifeW * 79 / 114;
$("#c").drawImage({
name: "life" + k,
source: "spaceinvaders/images/life.png",
x: newX,
y: 500 * hF - height + 1,
height: height,
width: lifeW,
layer: true
});
}
}
function death(){
lives--;
var thisLayer = lives + 1;
$("#c").removeLayer("life" + thisLayer);
if (lives == 0){
$("#c").drawLayers();
pause = true;
gameOver();
}
}
var score = 0;
function drawScore(){
$("#c").drawText({
name: "score",
fillStyle: 'white',
strokeWidth: 2,
x: 250 * hF, y: (500 - 14) * hF,
fontSize: 14 * hF,
fontFamily: 'Verdana, sans-serif',
text: "Score: " + score,
layer: true
});
}
function gameOver(win){
var text;
if (win){
resetEnemies();
} else {
text = "GAME OVER";
$("#c").drawText({
name: "gameover",
fillStyle: 'white',
strokeWidth: 5,
x: 250 * hF, y: 250 * hF,
fontSize: 40 * hF,
fontFamily: 'Verdana, sans-serif',
text: "GAME OVER",
layer: true
})
$("#c").setLayer("score", {x: 250 * hF, y: 280 * hF});
$("#c").drawLayers();
over = true;
$("#start").show();
}
}
</script>
<style>
#c {
// border-style: solid;
// border-width: 2px;
// border-color: #000000;
background-color: #000000;
}
</style>
</head>
<body>
<div id="holder" style="position: absolute; z-index: 0;">
<canvas id="c" width="500" height="500">Your browser does not support this feature.</canvas>
</div>
<p id="start" style="position: absolute; z-index: 1; background-color: #66FF33; color: #ffffff; font-size: 40px; cursor: pointer">Start Game</p>
</body>
</html>