collision detection three js

for (var vertexIndex = 0; vertexIndex < Player.geometry.vertices.length; vertexIndex++)
{       
    var localVertex = Player.geometry.vertices[vertexIndex].clone();
    var globalVertex = Player.matrix.multiplyVector3(localVertex);
    var directionVector = globalVertex.subSelf( Player.position );

    var ray = new THREE.Ray( Player.position, directionVector.clone().normalize() );
    var collisionResults = ray.intersectObjects( collidableMeshList );
    if ( collisionResults.length > 0 && collisionResults[0].distance < directionVector.length() ) 
    {
        // a collision occurred... do something...
    }
}