使用python在deck.gl中设置TripsLayer动画

Question

我在deck.gl网站(this one)上看到过TripsLayer的例子，它看起来真的很酷。我想要完成同样的工作，但是使用pydeck，这是deck.gl的python绑定。pydeck的网页(this one)中的示例不是动画，我不确定如何才能像javascript示例中所示的那样获得流畅的动画。我尝试了多种方法(传递列表、函数、变化值的变量等)。但是它们都没有成功，我也找不到任何使用pydeck的例子。

谢谢!

Answer 1

确实，这个例子应该包含更多的trips。以下是如何在jupyter笔记本中实现多次旅行的动画。

import time
import pandas as pd
import pydeck as pdk

data = '[{"agent_id":0,"path":[[-0.63968,50.83091,0.0],[-0.78175,50.83205,0.0]],"time":[65100,65520],"color":[228,87,86]},{"agent_id":1,"path":[[-0.63968,50.83091,0.0],[-0.78175,50.83205,0.0]],"time":[65940,66420],"color":[178,121,162]},{"agent_id":2,"path":[[-0.63968,50.83091,0.0],[-0.37617,50.8185,0.0]],"time":[65340,66360],"color":[157,117,93]},{"agent_id":3,"path":[[-0.63968,50.83091,0.0],[-0.78175,50.83205,0.0]],"time":[65940,66420],"color":[238,202,59]},{"agent_id":4,"path":[[-0.63968,50.83091,0.0],[-0.78175,50.83205,0.0]],"time":[67740,68160],"color":[157,117,93]}]'

df = pd.read_json(data)
view = {"bearing": 0, "latitude": 50.85, "longitude": -0.16, "pitch": 0, "zoom": 9}

time_min = 65_000
time_max = 80_000

layer = pdk.Layer(
    "TripsLayer",
    df,
    get_path='path',
    get_timestamps='time',
    get_color='color',
    opacity=0.8,
    width_min_pixels=3,
    rounded=True,
    trail_length=900,
    current_time=0
)

# Render
r = pdk.Deck(layers=[layer], initial_view_state=view, map_style='dark_no_labels')

r.show()

# Animate
for ct in range(time_min, time_max, 100):
    layer.current_time = ct
    r.update()
    time.sleep(0.1)