Lamp2 and source terminals

[pozitron57]

Sometimes lamp and source are designated as follows:

For the lamp, I used the code

class Lamp2(Source):
    ''' Incandescent Lamp 2 '''
    def __init__(self, *d, **kwargs):
        super().__init__(*d, **kwargs)
        r=0.5
        self.segments.append(Segment(
            [(r-r/2**.5, -r/2**.5),
             (r+r/2**.5,  r/2**.5)]))
        self.segments.append(Segment(
            [(r-r/2**.5,  r/2**.5),
             (r+r/2**.5, -r/2**.5)]))

and for the Terminal:

class Terminal(Element):
    def __init__(self, *d, r: float = 0.18, open: bool = False, **kwargs):
        super().__init__(*d, **kwargs)
        fill = 'bg'
        self.anchors['start'] = (0, 0)
        self.anchors['center'] = (0, 0)
        self.anchors['end'] = (0, 0)
        self.params['drop'] = (0, 0)
        self.params['theta'] = 0
        self.params['zorder'] = 4
        self.params['fill'] = fill
        self.segments.append(SegmentCircle((0, 0), r))
        kx=1.0
        ky=2.0
        self.segments.append(Segment(
            [ (-kx*r, -ky*r),
              ( kx*r,  ky*r), ]))

[cdelker]

Added in ac7f7c3. Thanks!