javascript - particle.subSelf() Undefined is not a function -

i trying give velocity , origin particle threes cant add origin

 function getorigin() {     return new three.vector3(weapon.vehicle.position.x, weapon.vehicle.position.y, weapon.vehicle.position.z); } function start() {     time = weapon.time;     done = false;      var origin = getorigin();     particles = new three.geometry();     var pmaterial = new three.particlebasicmaterial({         color: weapon.explosion.color,         size: weapon.explosion.size,         map: three.imageutils.loadtexture("img/particula.png"),         blending: three.additiveblending,         transparent: true     });     for(var p = 0; p < particlecount; p++) {         // create particle random         // position values, -250 -> 250         var px = (math.random() * weapon.vehicle.size.x) - (weapon.vehicle.size.x / 2),             py = (math.random() * weapon.vehicle.size.y) - (weapon.vehicle.size.y / 2),             pz = (math.random() * weapon.vehicle.size.z) - (weapon.vehicle.size.z / 2),             particle = new three.vector3(px, py, pz);          // create velocity vector         particle.velocity = particle.clone();         particle.addself(origin);          // add geometry         particles.vertices.push(particle);     }      // create particle system     particlesystem = new three.particlesystem(particles, pmaterial);     particlesystem.sortparticles = true;     scene.add(particlesystem); } 

particle.addself(origin); line gives me undefined function working fine older version of threes wanted upgrade r52 r67 , finding lots of issues please if have idea appreciated.

you can find migration notes here: https://github.com/mrdoob/three.js/wiki/migration , release notes here: https://github.com/mrdoob/three.js/releases