visualize.py 文件源码

def _render_polygon(axes, polygons, segments, facecolor, edgecolor, filled=True,alpha=1.0):
    vertices = []
    codes = []
    for polygon in polygons:
        vertices.extend(polygon + [(0, 0)])
        codes.extend(
            [path.Path.MOVETO] +
            [path.Path.LINETO] * (len(polygon) - 1) +
            [path.Path.CLOSEPOLY])
    if vertices and filled:
        axes.add_patch(
            patches.PathPatch(path.Path(vertices, codes), facecolor=facecolor, alpha=alpha))
    linewidth = 1
    if not filled: linewidth = 3
    for sx, sy, tx, ty in segments:
        axes.plot(
            [sx, tx], [sy, ty],
            linewidth=linewidth, color=edgecolor, zorder=1)