您可以通过从路径创建多边形来使用圆弧。
一个普通的正方形:
import matplotlib.path as mpath
import matplotlib.patches as patches
verts = [(0,0),
(1,0),
(1,1),
(0,1),
(0,0)]
codes = [mpath.Path.MOVETO] + (len(verts)-1)*[mpath.Path.LINETO]
square_verts = mpath.Path(verts, codes)
fig, ax = plt.subplots(subplot_kw={'aspect': 1.0, 'xlim': [-0.2,1.2], 'ylim': [-0.2,1.2]})
square = patches.PathPatch(square_verts, facecolor='orange', lw=2)
ax.add_patch(square)
圆角正方形可以用以下方法制作:
verts = [(0.2, 0.0),
(0.8, 0.0), # start of the lower right corner
(1.0, 0.0), # intermediate point (as if it wasn't rounded)
(1.0, 0.2), # end point of the lower right corner
(1.0, 0.8), # move to the next point etc.
(1.0, 1.0),
(0.8, 1.0),
(0.2, 1.0),
(0.0, 1.0),
(0.0, 0.8),
(0.0, 0.2),
(0.0, 0.0),
(0.2, 0.0)]
codes = [mpath.Path.MOVETO,
mpath.Path.LINETO,
mpath.Path.CURVE3,
mpath.Path.CURVE3,
mpath.Path.LINETO,
mpath.Path.CURVE3,
mpath.Path.CURVE3,
mpath.Path.LINETO,
mpath.Path.CURVE3,
mpath.Path.CURVE3,
mpath.Path.LINETO,
mpath.Path.CURVE3,
mpath.Path.CURVE3]
rounded_verts = mpath.Path(verts, codes)
fig, ax = plt.subplots(subplot_kw={'aspect': 1.0, 'xlim': [-0.2,1.2], 'ylim': [-0.2,1.2]})
rounded_verts = patches.PathPatch(rounded_verts, facecolor='orange', lw=2)
ax.add_patch(rounded_verts)
对于您的示例,您需要指定一个使用x-coordinate
从 Point1 和y-coordinate
从Point2开始。
matplotlib 路径教程提供了如何创建路径的详细描述:http://matplotlib.org/users/path_tutorial.html http://matplotlib.org/users/path_tutorial.html