gfx.py 文件源码

def start_simulation(self):
        """Starts the simulation with visualization."""

        self.show_setup(halt=False)
        main_plot, = self.axes.plot([])

        sim_process = mp.Process(target=self._sim_function, args=(self._plot_queue,))
        sim_process.start()

        # wait for simulation initialization
        while self._plot_queue.empty():
            pl.pause(0.1)

        finished = False
        while not finished:
            # wait for new simulation result
            while self._plot_queue.empty():
                pl.pause(0.01)

            message = self._plot_queue.get()
            # simulation function returns field object when simulation is complete to get output
            if isinstance(message, fld.Field):
                # update main process field components with simulation result
                self._update_components(message)
                finished = True
            else:
                time, data = message
                self.axes.title.set_text('{title} $t$ = {time:.{prec}f} {prefix}s'
                                         .format(title=self.plot_title, time=time/self._t_factor,
                                                 prec=self.time_precision, prefix=self._t_prefix))
                main_plot.set_data(self.field.x.vector / self._x_axis_factor, data)
                pl.pause(self.frame_delay)

        sim_process.join()
        pp.show()