SceneJS_math_divVec3 = function(u, v, dest) {
    if (!dest) {
        dest = u;
    }

    dest[0] = u[0] / v[0];
    dest[1] = u[1] / v[1];
    dest[2] = u[2] / v[2];

    return dest;
}
@param u vec3
@param v vec3
@param dest vec3 - optional destination
@return {vec3} dest if specified, u otherwise
@private