Select multiple custom objects on KineticJS and Javascript

Select multiple custom objects on KineticJS and Javascript

Good Evening for everyone. I create a object on KineticJS that has this
methods:
function addCelestial(cb){
this.celestialBody = new Kinetic.Circle({
id: cb.id,
x:cb.x,
y:cb.y,
fill:cb.color,
radius:cb.radius,
shadowColor: cb.glow,
shadowBlur: cb.glowBlur,
shadowOffset: 0,
shadowOpacity: cb.glowOpacity
});
this.xpos = function(value){
if (typeof value === "undefined") {
return this.celestialBody.getX();
} else {
this.celestialBody.setX(value);
}
};
this.ypos = function(value){
if (typeof value === "undefined") {
return this.celestialBody.getY();
} else {
this.celestialBody.setY(value);
}
};
this.xvel = function(value){
if (typeof value === "undefined") {
return this.xvel_v;
} else {
this.xvel_v = value;
}
};
this.yvel = function(value){
if (typeof value === "undefined") {
return this.yvel_v;
} else {
this.yvel_v = value;
}
};
this.xacc = function(value){
if (typeof value === "undefined") {
return this.xacc_v;
} else {
this.xacc_v = value;
}
};
this.yacc = function(value){
if (typeof value === "undefined") {
return this.yacc_v;
} else {
this.yacc_v = value;
}
};
this.mass = function(value){
if (typeof value === "undefined") {
return this.mass_v;
} else {
this.mass_v = value;
}
};
this.radius = function(value){
if (typeof value === "undefined") {
return this.celestialBody.getRadius();
} else {
this.celestialBody.setRadius(value);
}
};
this.resetForce = function(){
this.xacc(0);
this.yacc(0);
};
this.calcNewState = function(){
this.xvel(this.xvel() + this.xacc() * timestep);
this.yvel(this.yvel() + this.yacc() * timestep);
this.xpos(this.xpos() + timestep + this.xvel());
this.ypos(this.ypos() + timestep + this.yvel());
};
this.addForce = function(otherbody){
var radius =
Math.pow(Math.pow(otherbody.ypos()-this.ypos(),2)+Math.pow(otherbody.xpos()-this.xpos(),2),0.5);
var Gacc = otherbody.mass()/(Math.pow(radius,2));
var angle =
Math.atan2((otherbody.ypos()-this.ypos()),(otherbody.xpos()-this.xpos()));
this.xacc(this.xacc()+Gacc*Math.cos(angle));
this.yacc(this.yacc()+Gacc*Math.sin(angle));
};
this.logStatus = function(name){
console.log(name+' xpos:'+this.xpos()+' ypos'+this.ypos()+'
xacc:'+this.xacc()+' yacc:'+this.yacc()+' xvel:'+this.xvel()+'
yvel:'+this.yvel());
};
this.getChildren = function(){
return this;
};
cb.layer.add(this.celestialBody);
}
Then, i create a loop to create this objects:
for (var i = 0; i < 20;i++){
var asteroidID = 'asteroid' + i;
var asteroid = new addCelestial({color:
'rgb(255,255,255)',layer:layer0, id: asteroidID});
asteroid.radius(1);
asteroid.xpos((Math.random()*300)+200);
asteroid.ypos((Math.random()*5)+document.height/2);
asteroid.xvel(0);
asteroid.yvel(-5);
asteroid.mass(1000);
asteroid.xacc(0);
asteroid.yacc(0);
}
I'm trying everything to select all the 20 asteroids so i can run the
methods addForce, calcNewState and resetForce but i fail miserably. Can
someone please help-me with this?