// Particle3D class

Particle3D = function (material ) {

	THREE_IMWEB.Particle.call( this, material );

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

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

};

Particle3D.prototype = new THREE_IMWEB.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_IMWEB.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_IMWEB.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_IMWEB.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);
}