render_freestyle_svg.py 文件源码

def pathgen(stroke, path, height, split_at_invisible, f=lambda v: not v.attribute.visible):
        """Generator that creates SVG paths (as strings) from the current stroke """
        it = iter(stroke)
        # start first path
        yield path
        for v in it:
            x, y = v.point
            yield '{:.3f}, {:.3f} '.format(x, height - y)
            if split_at_invisible and v.attribute.visible is False:
                # end current and start new path;
                yield '" />' + path
                # fast-forward till the next visible vertex
                it = itertools.dropwhile(f, it)
                # yield next visible vertex
                svert = next(it, None)
                if svert is None:
                    break
                x, y = svert.point
                yield '{:.3f}, {:.3f} '.format(x, height - y)
        # close current path
        yield '" />'