def _render_callback(self):
    sites_offset = (self.sim.data.site_xpos - self.sim.model.site_pos).copy()
    site_id = self.sim.model.site_name2id('target0')
    self.sim.model.site_pos[site_id] = (self.goal - sites_offset[0])
    self.sim.forward()
def _render_callback(self):
    sites_offset = (self.sim.data.site_xpos - self.sim.model.site_pos).copy()
    site_id = self.sim.model.site_name2id('target0')
    self.sim.model.site_pos[site_id] = (self.goal - sites_offset[0])
    self.sim.forward()