Jac*_*aak 23 python animation matplotlib
我在matplotlib的动画模块中使用FuncAnimation进行一些基本动画.此函数永久循环播放动画.有没有办法通过鼠标点击暂停和重启动画?
unu*_*tbu 30
这是一个FuncAnimation示例,我修改为在鼠标点击时暂停.由于动画由生成器函数驱动simData,当全局变量pause为True时,产生相同的数据会使动画暂停.
paused通过设置事件回调来切换值:
def onClick(event):
global pause
pause ^= True
fig.canvas.mpl_connect('button_press_event', onClick)
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import matplotlib.pyplot as plt
import numpy as np
import matplotlib.animation as animation
pause = False
def simData():
t_max = 10.0
dt = 0.05
x = 0.0
t = 0.0
while t < t_max:
if not pause:
x = np.sin(np.pi*t)
t = t + dt
yield x, t
def onClick(event):
global pause
pause ^= True
def simPoints(simData):
x, t = simData[0], simData[1]
time_text.set_text(time_template%(t))
line.set_data(t, x)
return line, time_text
fig = plt.figure()
ax = fig.add_subplot(111)
line, = ax.plot([], [], 'bo', ms=10)
ax.set_ylim(-1, 1)
ax.set_xlim(0, 10)
time_template = 'Time = %.1f s'
time_text = ax.text(0.05, 0.9, '', transform=ax.transAxes)
fig.canvas.mpl_connect('button_press_event', onClick)
ani = animation.FuncAnimation(fig, simPoints, simData, blit=False, interval=10,
repeat=True)
plt.show()
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小智 11
这有效......
anim = animation.FuncAnimation(fig, animfunc[,..other args])
#pause
anim.event_source.stop()
#unpause
anim.event_source.start()
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woo*_*ute 10
结合@fred和@unutbu的答案,我们可以在创建动画后添加onClick函数:
import matplotlib.pyplot as plt
import matplotlib.animation as animation
fig = plt.figure()
def run_animation():
anim_running = True
def onClick(event):
nonlocal anim_running
if anim_running:
anim.event_source.stop()
anim_running = False
else:
anim.event_source.start()
anim_running = True
def animFunc( ...args... ):
# Animation update function here
fig.canvas.mpl_connect('button_press_event', onClick)
anim = animation.FuncAnimation(fig, animFunc[,...other args])
run_animation()
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现在我们可以通过点击停止或启动动画.
我登陆这个页面试图实现相同的功能,暂停 matplotlibs 动画。其他答案很好,但除此之外,我还希望能够使用箭头键手动循环浏览帧。对于任何寻找相同功能的人,这是我的实现:
import matplotlib.pyplot as plt
import matplotlib.animation as ani
fig, ax = plt.subplots()
txt = fig.text(0.5,0.5,'0')
def update_time():
t = 0
t_max = 10
while t<t_max:
t += anim.direction
yield t
def update_plot(t):
txt.set_text('%s'%t)
return txt
def on_press(event):
if event.key.isspace():
if anim.running:
anim.event_source.stop()
else:
anim.event_source.start()
anim.running ^= True
elif event.key == 'left':
anim.direction = -1
elif event.key == 'right':
anim.direction = +1
# Manually update the plot
if event.key in ['left','right']:
t = anim.frame_seq.next()
update_plot(t)
plt.draw()
fig.canvas.mpl_connect('key_press_event', on_press)
anim = ani.FuncAnimation(fig, update_plot, frames=update_time,
interval=1000, repeat=True)
anim.running = True
anim.direction = +1
plt.show()
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一些注意事项:
running和direction,我分配他们anim。它避免使用非本地(在 Python2.7 中不可用)或全局(不可取,因为我在另一个函数中运行此代码)。不确定这是否是好的做法,但我发现它非常优雅。animFuncAnimation 用来更新绘图的生成器对象。这确保当我恢复动画时,它从活动帧开始,而不是从最初暂停的位置开始。| 归档时间: |
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