// JavaScript Document
// Particle3D class

Particle3D = function (material ) {

THREE.Particle.call( this, material );

//this.material = material instanceof Array ? material : [ material ];

// define properties
this.velocity = new THREE.Vector3(0,-8,0);
this.velocity.rotateX(randomRange(-45,45));
this.velocity.rotateY(randomRange(0,360));
this.gravity = new THREE.Vector3(0,0,0);
this.drag = 1;
// methods...

};

Particle3D.prototype = new THREE.Particle();
Particle3D.prototype.constructor = Particle3D;

Particle3D.prototype.updatePhysics = function() {

this.velocity.multiplyScalar(this.drag);
this.velocity.addSelf(this.gravity);
this.position.addSelf(this.velocity);

}

var TO_RADIANS = Math.PI/180;

THREE.Vector3.prototype.rotateY = function(angle){

cosRY = Math.cos(angle * TO_RADIANS);
sinRY = Math.sin(angle * TO_RADIANS);

var tempz = this.z;;
var tempx = this.x;

this.x= (tempx*cosRY)+(tempz*sinRY);
this.z= (tempx*-sinRY)+(tempz*cosRY);


}

THREE.Vector3.prototype.rotateX = function(angle){

cosRY = Math.cos(angle * TO_RADIANS);
sinRY = Math.sin(angle * TO_RADIANS);

var tempz = this.z;;
var tempy = this.y;

this.y= (tempy*cosRY)+(tempz*sinRY);
this.z= (tempy*-sinRY)+(tempz*cosRY);


}

THREE.Vector3.prototype.rotateZ = function(angle){

cosRY = Math.cos(angle * TO_RADIANS);
sinRY = Math.sin(angle * TO_RADIANS);

var tempx = this.x;;
var tempy = this.y;

this.y= (tempy*cosRY)+(tempx*sinRY);
this.x= (tempy*-sinRY)+(tempx*cosRY);


}



// returns a random number between the two limits provided
function randomRange(min, max)
{
return ((Math.random()*(max-min)) + min);
}