Method phase_in_material

python/simulation.py:2647–2667

`newstructure` should be the `structure` field of another `Simulation` object with the same cell size and resolution. Over the next time period `phasetime` (in the current simulation's time units), the current structure ($\\varepsilon$, $\\mu$, and conductivi

(self, structure, time)

        return self.fields.round_time()

    def phase_in_material(self, structure, time):
        """
        `newstructure` should be the `structure` field of another
        `Simulation` object with the same cell size and resolution.
        Over the next time period `phasetime` (in the current
        simulation's time units), the current structure
        ($\\varepsilon$, $\\mu$, and conductivity $\\sigma_D$) will be
        gradually changed to `newstructure`. In particular, at each
        timestep it linearly interpolates between the old structure
        and the new structure. After `phasetime` has elapsed, the
        structure will remain equal to `newstructure`. This is
        demonstrated in the following image for two
        [Cylinder](#cylinder) objects (the simulation script is in
        [examples/phase_in_material.py](https://github.com/NanoComp/meep/blob/master/python/examples/phase_in_material.py)).

        ![](images/phase-in-material.png#center)
        """
        if self.fields is None:
            self.init_sim()

        return self.fields.phase_in_material(structure, time)

    def set_boundary(self, side, direction, condition):
        """