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@naps62
Created April 9, 2015 00:08
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A JS component pattern implementation
var GameObject = function(name) {
this.name = name || "gameObject";
this.components = [];
}
GameObject.prototype.update = function() {
this.components.map(function(component) {
if (!!component.update) {
component.update();
}
});
}
GameObject.prototype.render = function() {
this.components.map(function(component) {
if (!!component.render) {
component.render();
}
});
}
GameObject.prototype.getComponents = function(type) {
return this.components.filter(function(component) {
return type == null || (component instanceof type);
});
}
GameObject.prototype.getComponent = function(type) {
return this.getComponents(type)[0];
}
GameObject.prototype.addComponent = function(type, options) {
var component = new type(this, options);
this.components.push(component);
}
var Transform = function(owner, options) {
this.owner = owner;
this.x = options.x || 0;
this.y = options.y || 0;
}
Transform.prototype.render = function() {
console.log(this.owner.name + ': ('+ this.x + ', ' + this.y +')')
}
var LinearMovement = function(owner, options) {
this.owner = owner;
this.offX = options.offX || 0;
this.offY = options.offY || 0;
}
LinearMovement.prototype.update = function() {
var transform = this.owner.getComponent(Transform);
transform.x += this.offX;
transform.y += this.offY;
}
var rectToRight = new GameObject("rectToRight");
rectToRight.addComponent(Transform, {
x: 10,
y: 20
});
rectToRight.addComponent(LinearMovement, {
offX: 10,
offY: 0
});
var rectToBottom = new GameObject("rectToBottom");
rectToBottom.addComponent(Transform, {
x: 10,
y: 20
});
rectToBottom.addComponent(LinearMovement, {
offX: 0,
offY: 10
});
var scene = [rectToRight];
var update = function() {
scene.map(function(object) {
object.update();
});
}
var render = function() {
scene.map(function(object) {
object.render();
});
}
setInterval(update, 500);
setInterval(render, 1300);
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