Matplotlib 动画不接受圆形补丁作为farg

Question

import math
import matplotlib
import matplotlib.pyplot as plt
import matplotlib.patches as patches
from matplotlib.patches import Circle
from matplotlib import animation
from utils import rgb2hex
from tg import small_tg

matplotlib.rcParams["figure.figsize"]=(10, 5)
matplotlib.rcParams['toolbar'] = 'None'

fig, ax = plt.subplots()
ax.axis("equal")
ax.set_xlim(-10, 10)
ax.set_ylim(-5, 5)
ax.axis("off")

state_nodes = []
for state in small_tg["states"]:
    center = small_tg["states"][state]["graphic_properties"]["position"]
    state_nodes.append(Circle(center, 0.2, color = rgb2hex(255, 255, 255)))

def animate(i, state):
    print("&", i ,state)
    y = math.ceil((abs(i-100))*2.55)
    print(i, y, (abs(i-100))*2.55)
    state.set_color = rgb2hex(y,y,y)
    ax.add_artist(state)
    return state,

for state in state_nodes:
    print(state)
    animation.FuncAnimation(fig, animate, fargs = (state,), frames=201, interval=1, blit=True, repeat = False)

plt.show()

The print statement inside the for loop is displaying the states, however the print statement inside the animate function shows nothing, meaning that the function is not being called. I can't find any logical errors. Please help.

Answer 1

If you want to animate several elements together, you should not run several FuncAnimation . Instead, run one animation, and animate all the artists in the single animate() function.

I could not run you code, but I tried to stay close to what I could understand of your code in this demonstration:

import math
import matplotlib
import matplotlib.pyplot as plt
from matplotlib.patches import Circle
from matplotlib import animation
from matplotlib.colors import rgb2hex

fig, ax = plt.subplots()
ax.axis("equal")
ax.set_xlim(-10, 10)
ax.set_ylim(-5, 5)
ax.axis("off")

state_nodes = [Circle(center, 0.2, color='k') for center in np.random.normal(loc=0, scale=1, size=(5,2))]
for state in state_nodes:
    ax.add_artist(state)

def animate(i, states):
    c = (i/255)
    for state in states:
        dx,dy = np.random.normal(loc=0, scale=0.1, size=(2,))
        x,y = state.get_center()
        state.set_center((x+dx,y+dy))
        state.set_color(rgb2hex((c,c,c)))
    return states


ani = animation.FuncAnimation(fig, animate, fargs = (state_nodes,), frames=201, interval=25, blit=True, repeat = False)
plt.show()