Created
December 20, 2010 14:15
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dersoldat gamejs file
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var gamejs = require('gamejs'); | |
var $v = require('gamejs/utils/vectors'); | |
function main() { | |
gamejs.display.setCaption("Der Soldat"); | |
// create background | |
var screen = gamejs.display.setMode([850, 500]); | |
var displayRect = screen.rect; | |
var bg = gamejs.image.load('images/ground.png'); | |
var clouds = gamejs.image.load('images/clouds.png'); | |
var heliGui = gamejs.image.load('images/heligui.png'); | |
// test | |
var combatants = new gamejs.sprite.Group(); | |
var bombs = new gamejs.sprite.Group(); | |
var getCombatant = function(type) { | |
var tank = new gamejs.scene.MovingSprite(); | |
var pos = [0,0]; | |
if (Math.random() > 0.5) { | |
pos[0] = parseInt(Math.random() * displayRect.width); | |
} else { | |
pos[1] = parseInt(Math.random() * displayRect.height); | |
} | |
tank.setPosition(pos); | |
tank.setImage('images/' + type + '.png'); | |
tank.setSpeed(type === 'tank' ? 5 : 2); | |
tank.goTo([Math.random() * displayRect.width, Math.random() * displayRect.height]); | |
return tank; | |
} | |
// sounds | |
/* | |
var pulse = new gamejs.mixer.Sound('sounds/lowpulse.ogg'); | |
var explosion = new gamejs.mixer.Sound('sounds/explosion.ogg'); | |
var kick = | |
*/ | |
var craters = []; | |
/** | |
* bomb | |
*/ | |
var Bomb = function(pos) { | |
var EXP_SIZE = [60, 60]; | |
Bomb.superConstructor.apply(this, arguments); | |
this.rect = new gamejs.Rect([0,0], EXP_SIZE); | |
this.rect.center = pos; | |
this.image = null; | |
this.flightDuration = 0; | |
this.explosionDuration = 0; | |
this.isOnGround = false; | |
this.frameTime = 0; | |
this.currentFrame = 0; | |
this.frameDuration = 80; | |
this.frameDirection = 1; | |
(new gamejs.mixer.Sound('sounds/kick.ogg')).play(); | |
(new gamejs.mixer.Sound('sounds/lowpulse.ogg')).play(); | |
return this; | |
}; | |
gamejs.utils.objects.extend(Bomb, gamejs.sprite.Sprite) | |
Bomb.prototype.draw = function(screen) { | |
if (!this.image) return; | |
screen.blit(this.image, this.rect); | |
return; | |
}; | |
Bomb.prototype.update = function(msDuration) { | |
if (this.isOnGround) { | |
this.frameTime += msDuration; | |
if (!this.image || this.frameTime > this.frameDuration) { | |
if (this.currentFrame < 0) { | |
this.kill(); | |
return; | |
} | |
this.image = gamejs.image.load('images/explosion_' + this.currentFrame +'.png'); | |
this.frameTime = 0; | |
if (this.currentFrame == 11) { | |
var craterRect = new gamejs.Rect(this.rect); | |
craterRect.width = 15 | |
craterRect.height = 15; | |
craterRect.center = this.rect.center; | |
craters.push({ | |
image: gamejs.image.load('images/crater_' + parseInt(Math.random() * 6, 10) + '.png'), | |
rect: craterRect, | |
}); | |
this.frameDirection = -1; | |
} | |
this.currentFrame += this.frameDirection; | |
} | |
} else { | |
this.flightDuration += msDuration; | |
if (this.flightDuration > 3500) { | |
(new gamejs.mixer.Sound('sounds/explosion.ogg')).play(); | |
this.isOnGround = true; | |
}; | |
} | |
return; | |
}; | |
/** | |
* Main Game 'loop' | |
* | |
*/ | |
var jitterPause = 300; | |
var jitterCumulated = null; | |
jitterPos = displayRect; | |
var spawnPause = 3500; | |
var spawnCumulated = null; | |
var shootPause = 1500; | |
var shootCumulated = shootPause * 2; | |
function tick(msDuration) { | |
// event handling | |
gamejs.event.get().forEach(function(event) { | |
if (event.type === gamejs.event.MOUSE_UP) { | |
if (event.button === 0) { | |
if (shootCumulated > shootPause) { | |
bombs.add(new Bomb(event.pos)); | |
shootCumulated = 0; | |
} | |
} | |
}; | |
}); | |
shootCumulated += msDuration; | |
// update models | |
combatants.update(msDuration); | |
bombs.update(msDuration); | |
// bomb combat collision detection | |
bombs.sprites().filter(function(bomb) { | |
if (bomb.currentFrame >= 8) { | |
gamejs.sprite.spriteCollide(bomb, combatants, true); | |
} | |
}, this); | |
// combatent spawn | |
if (spawnCumulated === null || spawnCumulated > spawnPause) { | |
if (Math.random() > 0.5) { | |
combatants.add(getCombatant('tank')); | |
combatants.add(getCombatant('tank')); | |
} else { | |
combatants.add(getCombatant('infantry')); | |
combatants.add(getCombatant('infantry')); | |
} | |
spawnCumulated = 0; | |
} | |
spawnCumulated += msDuration; | |
// draw | |
screen.blit(bg, displayRect); | |
craters.forEach(function(crater) { | |
screen.blit(crater.image, crater.rect); | |
}); | |
combatants.draw(screen); | |
bombs.draw(screen); | |
// screen jitter | |
if (jitterCumulated === null | jitterCumulated >= jitterPause) { | |
jitterPos = displayRect.move(-5 + (Math.random() * 5), -5 + (Math.random() * 5)) | |
jitterPos.width = displayRect.width * 1.3; | |
jitterPos.height = displayRect.height * 1.3; | |
jitterCumulated = 0; | |
} | |
jitterCumulated += msDuration; | |
screen.blit(clouds, jitterPos); | |
screen.blit(heliGui, displayRect); | |
}; | |
gamejs.time.fpsCallback(tick, this, 30); | |
return; | |
} | |
var PRELOAD_LIST = [ | |
'images/ground.png', | |
'images/clouds.png', | |
'images/heligui.png', | |
'images/tank.png', | |
'images/infantry.png', | |
'sounds/kick.ogg', | |
'sounds/explosion.ogg', | |
'sounds/lowpulse.ogg', | |
]; | |
for (var i=0;i<12;i++) { | |
PRELOAD_LIST.push('images/explosion_' + i + '.png'); | |
}; | |
for (var i=0;i<6;i++) { | |
PRELOAD_LIST.push('images/crater_' + i + '.png'); | |
}; | |
gamejs.preload(PRELOAD_LIST); | |
gamejs.ready(main); |
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