技术背景
三维可视化是一项在工业领域中非常重要的技术，而Python中最热门的可视化工具matplotlib和plotly，更加倾向于在数据领域的可视化，用于展现数据的结果。类似的还有百度的pyechart也相对美观，但是这些毕竟都是在数据层面的可视化，对于工业领域，比如一个地形，一个三维的期间等等，用这些工具来做可视化效果非常的不佳，因此我找到了pyvista这个工具，简单摸索了一下给大家做个引荐。
安装pyvista
因为pyvista及其依赖都是一些python库，这就使得我们可以用pip直接简单的安装，这里放几个可能用到的依赖的安装流程：
(base) dechin@ubuntu2004:~/projects$ python3 -m pip install vtk==9.0.20210612.dev0
Collecting vtk==9.0.20210612.dev0
Downloading vtk-9.0.20210612.dev0-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (80.9 MB)
|████████████████████████████████| 80.9 MB 3.7 MB/s
Requirement already satisfied: wslink>=0.1.3 in /home/dechin/anaconda3/lib/python3.8/site-packages (from vtk==9.0.20210612.dev0) (0.2.0)
Requirement already satisfied: Twisted>=17.5.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from vtk==9.0.20210612.dev0) (21.2.0)
Requirement already satisfied: matplotlib>=2.0.0 in /home/dechin/.local/lib/python3.8/site-packages (from vtk==9.0.20210612.dev0) (3.3.4)
Requirement already satisfied: autobahn>=17.7.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from vtk==9.0.20210612.dev0) (21.3.1)
Requirement already satisfied: cryptography>=3.4.6 in /home/dechin/anaconda3/lib/python3.8/site-packages (from autobahn>=17.7.1->vtk==9.0.20210612.dev0) (3.4.7)
Requirement already satisfied: txaio>=21.2.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from autobahn>=17.7.1->vtk==9.0.20210612.dev0) (21.2.1)
Requirement already satisfied: hyperlink>=21.0.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from autobahn>=17.7.1->vtk==9.0.20210612.dev0) (21.0.0)
Requirement already satisfied: cffi>=1.12 in /home/dechin/anaconda3/lib/python3.8/site-packages (from cryptography>=3.4.6->autobahn>=17.7.1->vtk==9.0.20210612.dev0) (1.14.5)
Requirement already satisfied: pycparser in /home/dechin/anaconda3/lib/python3.8/site-packages (from cffi>=1.12->cryptography>=3.4.6->autobahn>=17.7.1->vtk==9.0.20210612.dev0) (2.20)
Requirement already satisfied: idna>=2.5 in /home/dechin/.local/lib/python3.8/site-packages (from hyperlink>=21.0.0->autobahn>=17.7.1->vtk==9.0.20210612.dev0) (2.10)
Requirement already satisfied: python-dateutil>=2.1 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk==9.0.20210612.dev0) (2.8.1)
Requirement already satisfied: pillow>=6.2.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk==9.0.20210612.dev0) (8.2.0)
Requirement already satisfied: kiwisolver>=1.0.1 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk==9.0.20210612.dev0) (1.3.1)
Requirement already satisfied: numpy>=1.15 in /home/dechin/anaconda3/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk==9.0.20210612.dev0) (1.20.2)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.3 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk==9.0.20210612.dev0) (2.4.7)
Requirement already satisfied: cycler>=0.10 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk==9.0.20210612.dev0) (0.10.0)
Requirement already satisfied: six in /home/dechin/.local/lib/python3.8/site-packages (from cycler>=0.10->matplotlib>=2.0.0->vtk==9.0.20210612.dev0) (1.16.0)
Requirement already satisfied: zope.interface>=4.4.2 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk==9.0.20210612.dev0) (5.4.0)
Requirement already satisfied: attrs>=19.2.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk==9.0.20210612.dev0) (21.2.0)
Requirement already satisfied: constantly>=15.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk==9.0.20210612.dev0) (15.1.0)
Requirement already satisfied: Automat>=0.8.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk==9.0.20210612.dev0) (20.2.0)
Requirement already satisfied: incremental>=16.10.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk==9.0.20210612.dev0) (21.3.0)
Requirement already satisfied: setuptools in /home/dechin/anaconda3/lib/python3.8/site-packages (from zope.interface>=4.4.2->Twisted>=17.5.0->vtk==9.0.20210612.dev0) (52.0.0.post20210125)
Installing collected packages: vtk
Attempting uninstall: vtk
Found existing installation: vtk 9.0.2
Uninstalling vtk-9.0.2:
Successfully uninstalled vtk-9.0.2
Successfully installed vtk-9.0.20210612.dev0
安装pyvista的时候最好加上一个国内的镜像源，否则有可能出现网络问题，其他的包不需要加镜像源：
(base) dechin@ubuntu2004:~/projects$ python3 -m pip install pyvista --trusted-host https://repo.huaweicloud.com -i https://repo.huaweicloud.com/repository/pypi/simple
Looking in indexes: https://repo.huaweicloud.com/repository/pypi/simple
Collecting pyvista
Downloading https://repo.huaweicloud.com/repository/pypi/packages/ec/00/292dc2f14247d74098806dcb9e1bb0c416b936c145ca9ab4e940b6f90d4f/pyvista-0.31.3-py3-none-any.whl (1.3 MB)
|████████████████████████████████| 1.3 MB 2.7 MB/s
Requirement already satisfied: imageio in /home/dechin/anaconda3/lib/python3.8/site-packages (from pyvista) (2.9.0)
Requirement already satisfied: numpy in /home/dechin/anaconda3/lib/python3.8/site-packages (from pyvista) (1.20.2)
Requirement already satisfied: pillow in /home/dechin/anaconda3/lib/python3.8/site-packages (from pyvista) (8.2.0)
Collecting scooby>=0.5.1
Downloading https://repo.huaweicloud.com/repository/pypi/packages/1b/99/db6d34bdc3f060d631f524c2f0fc4b1919cd3bf734c905fc1b25eb847ac2/scooby-0.5.7-py3-none-any.whl (13 kB)
Collecting transforms3d==0.3.1
Downloading https://repo.huaweicloud.com/repository/pypi/packages/b5/f7/e85809168a548a854d7c1331560c27b4f5381698d29c12e57759192b2bc1/transforms3d-0.3.1.tar.gz (62 kB)
|████████████████████████████████| 62 kB 2.2 MB/s
Requirement already satisfied: vtk in /home/dechin/anaconda3/lib/python3.8/site-packages (from pyvista) (9.0.20210612.dev0)
Requirement already satisfied: appdirs in /home/dechin/anaconda3/lib/python3.8/site-packages (from pyvista) (1.4.4)
Collecting meshio<5.0,>=4.0.3
Downloading https://repo.huaweicloud.com/repository/pypi/packages/bb/36/02702cfc5fdf19e6477ea2a78cac4a774a8da4c2cf9557f3ddfb33c74192/meshio-4.4.6-py3-none-any.whl (158 kB)
|████████████████████████████████| 158 kB 2.7 MB/s
Requirement already satisfied: autobahn>=17.7.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from vtk->pyvista) (21.3.1)
Requirement already satisfied: wslink>=0.1.3 in /home/dechin/anaconda3/lib/python3.8/site-packages (from vtk->pyvista) (0.2.0)
Requirement already satisfied: matplotlib>=2.0.0 in /home/dechin/.local/lib/python3.8/site-packages (from vtk->pyvista) (3.3.4)
Requirement already satisfied: Twisted>=17.5.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from vtk->pyvista) (21.2.0)
Requirement already satisfied: txaio>=21.2.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from autobahn>=17.7.1->vtk->pyvista) (21.2.1)
Requirement already satisfied: cryptography>=3.4.6 in /home/dechin/anaconda3/lib/python3.8/site-packages (from autobahn>=17.7.1->vtk->pyvista) (3.4.7)
Requirement already satisfied: hyperlink>=21.0.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from autobahn>=17.7.1->vtk->pyvista) (21.0.0)
Requirement already satisfied: cffi>=1.12 in /home/dechin/anaconda3/lib/python3.8/site-packages (from cryptography>=3.4.6->autobahn>=17.7.1->vtk->pyvista) (1.14.5)
Requirement already satisfied: pycparser in /home/dechin/anaconda3/lib/python3.8/site-packages (from cffi>=1.12->cryptography>=3.4.6->autobahn>=17.7.1->vtk->pyvista) (2.20)
Requirement already satisfied: idna>=2.5 in /home/dechin/.local/lib/python3.8/site-packages (from hyperlink>=21.0.0->autobahn>=17.7.1->vtk->pyvista) (2.10)
Requirement already satisfied: python-dateutil>=2.1 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk->pyvista) (2.8.1)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.3 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk->pyvista) (2.4.7)
Requirement already satisfied: cycler>=0.10 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk->pyvista) (0.10.0)
Requirement already satisfied: kiwisolver>=1.0.1 in /home/dechin/.local/lib/python3.8/site-packages (from matplotlib>=2.0.0->vtk->pyvista) (1.3.1)
Requirement already satisfied: six in /home/dechin/.local/lib/python3.8/site-packages (from cycler>=0.10->matplotlib>=2.0.0->vtk->pyvista) (1.16.0)
Requirement already satisfied: zope.interface>=4.4.2 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk->pyvista) (5.4.0)
Requirement already satisfied: attrs>=19.2.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk->pyvista) (21.2.0)
Requirement already satisfied: constantly>=15.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk->pyvista) (15.1.0)
Requirement already satisfied: Automat>=0.8.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk->pyvista) (20.2.0)
Requirement already satisfied: incremental>=16.10.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from Twisted>=17.5.0->vtk->pyvista) (21.3.0)
Requirement already satisfied: setuptools in /home/dechin/anaconda3/lib/python3.8/site-packages (from zope.interface>=4.4.2->Twisted>=17.5.0->vtk->pyvista) (52.0.0.post20210125)
Building wheels for collected packages: transforms3d
Building wheel for transforms3d (setup.py) ... done
Created wheel for transforms3d: filename=transforms3d-0.3.1-py3-none-any.whl size=59373 sha256=56293f06c7932f3c12d57476773220d4219d8a978257f84bf56f4a8be8cccb2b
Stored in directory: /home/dechin/.cache/pip/wheels/45/80/2d/22eb03277c315a020a6fdb617cc1232ef4ddc04dc2f00b8a22
Successfully built transforms3d
Installing collected packages: transforms3d, scooby, meshio, pyvista
Successfully installed meshio-4.4.6 pyvista-0.31.3 scooby-0.5.7 transforms3d-0.3.1
另外还有这个三维可交互面板绘制的插件：
(base) dechin@ubuntu2004:~/projects$ python3 -m pip install ipygany
Collecting ipygany
Using cached ipygany-0.5.0-py2.py3-none-any.whl (2.9 MB)
Requirement already satisfied: numpy in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipygany) (1.20.2)
Requirement already satisfied: traittypes in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipygany) (0.2.1)
Requirement already satisfied: ipywidgets>=7.6.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipygany) (7.6.3)
Requirement already satisfied: ipython>=4.0.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipywidgets>=7.6.0->ipygany) (7.22.0)
Requirement already satisfied: ipykernel>=4.5.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipywidgets>=7.6.0->ipygany) (5.3.4)
Requirement already satisfied: widgetsnbextension~=3.5.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipywidgets>=7.6.0->ipygany) (3.5.1)
Requirement already satisfied: jupyterlab-widgets>=1.0.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipywidgets>=7.6.0->ipygany) (1.0.0)
Requirement already satisfied: traitlets>=4.3.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipywidgets>=7.6.0->ipygany) (5.0.5)
Requirement already satisfied: nbformat>=4.2.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipywidgets>=7.6.0->ipygany) (5.1.3)
Requirement already satisfied: jupyter-client in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipykernel>=4.5.1->ipywidgets>=7.6.0->ipygany) (6.1.12)
Requirement already satisfied: tornado>=4.2 in /home/dechin/.local/lib/python3.8/site-packages (from ipykernel>=4.5.1->ipywidgets>=7.6.0->ipygany) (6.1)
Requirement already satisfied: backcall in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (0.2.0)
Requirement already satisfied: pygments in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (2.9.0)
Requirement already satisfied: prompt-toolkit!=3.0.0,!=3.0.1,<3.1.0,>=2.0.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (3.0.17)
Requirement already satisfied: decorator in /home/dechin/.local/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (4.4.2)
Requirement already satisfied: pexpect>4.3 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (4.8.0)
Requirement already satisfied: jedi>=0.16 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (0.17.2)
Requirement already satisfied: setuptools>=18.5 in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (52.0.0.post20210125)
Requirement already satisfied: pickleshare in /home/dechin/anaconda3/lib/python3.8/site-packages (from ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (0.7.5)
Requirement already satisfied: parso<0.8.0,>=0.7.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from jedi>=0.16->ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (0.7.0)
Requirement already satisfied: jupyter-core in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbformat>=4.2.0->ipywidgets>=7.6.0->ipygany) (4.7.1)
Requirement already satisfied: jsonschema!=2.5.0,>=2.4 in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbformat>=4.2.0->ipywidgets>=7.6.0->ipygany) (3.2.0)
Requirement already satisfied: ipython-genutils in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbformat>=4.2.0->ipywidgets>=7.6.0->ipygany) (0.2.0)
Requirement already satisfied: six>=1.11.0 in /home/dechin/.local/lib/python3.8/site-packages (from jsonschema!=2.5.0,>=2.4->nbformat>=4.2.0->ipywidgets>=7.6.0->ipygany) (1.16.0)
Requirement already satisfied: pyrsistent>=0.14.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from jsonschema!=2.5.0,>=2.4->nbformat>=4.2.0->ipywidgets>=7.6.0->ipygany) (0.17.3)
Requirement already satisfied: attrs>=17.4.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from jsonschema!=2.5.0,>=2.4->nbformat>=4.2.0->ipywidgets>=7.6.0->ipygany) (21.2.0)
Requirement already satisfied: ptyprocess>=0.5 in /home/dechin/anaconda3/lib/python3.8/site-packages (from pexpect>4.3->ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (0.7.0)
Requirement already satisfied: wcwidth in /home/dechin/anaconda3/lib/python3.8/site-packages (from prompt-toolkit!=3.0.0,!=3.0.1,<3.1.0,>=2.0.0->ipython>=4.0.0->ipywidgets>=7.6.0->ipygany) (0.2.5)
Requirement already satisfied: notebook>=4.4.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (6.4.0)
Requirement already satisfied: pyzmq>=17 in /home/dechin/anaconda3/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (20.0.0)
Requirement already satisfied: Send2Trash>=1.5.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (1.5.0)
Requirement already satisfied: terminado>=0.8.3 in /home/dechin/anaconda3/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (0.9.4)
Requirement already satisfied: argon2-cffi in /home/dechin/anaconda3/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (20.1.0)
Requirement already satisfied: nbconvert in /home/dechin/anaconda3/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (6.1.0)
Requirement already satisfied: jinja2 in /home/dechin/anaconda3/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (3.0.1)
Requirement already satisfied: prometheus-client in /home/dechin/anaconda3/lib/python3.8/site-packages (from notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (0.11.0)
Requirement already satisfied: python-dateutil>=2.1 in /home/dechin/.local/lib/python3.8/site-packages (from jupyter-client->ipykernel>=4.5.1->ipywidgets>=7.6.0->ipygany) (2.8.1)
Requirement already satisfied: cffi>=1.0.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from argon2-cffi->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (1.14.5)
Requirement already satisfied: pycparser in /home/dechin/anaconda3/lib/python3.8/site-packages (from cffi>=1.0.0->argon2-cffi->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (2.20)
Requirement already satisfied: MarkupSafe>=2.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from jinja2->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (2.0.1)
Requirement already satisfied: entrypoints>=0.2.2 in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (0.3)
Requirement already satisfied: pandocfilters>=1.4.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (1.4.3)
Requirement already satisfied: testpath in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (0.5.0)
Requirement already satisfied: nbclient<0.6.0,>=0.5.0 in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (0.5.3)
Requirement already satisfied: jupyterlab-pygments in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (0.1.2)
Requirement already satisfied: mistune<2,>=0.8.1 in /home/dechin/anaconda3/lib/python3.8/site-packages (from nbconvert->notebook>=4.4.1->widgetsnbextension~=3.5.0->ipywidgets>=7.6.0->ipygany) (0.8.4)
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Installing collected packages: ipygany
Successfully installed ipygany-0.5.0
以及一个基于pyqt的一个弹出式绘图插件：
(base) dechin@ubuntu2004:~/projects$ python3 -m pip install pyvistaqt
Collecting pyvistaqt
Downloading pyvistaqt-0.5.0-py3-none-any.whl (162 kB)
|████████████████████████████████| 162 kB 1.1 MB/s
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Installing collected packages: pyvistaqt
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到这里为止，我们所需要的插件就基本上安装完成了。
案例测试
到这里为止我们就可以看下这个库的运行效果。
画单个球体
首先执行一个画球的简单案例，这里一般都是在jupyter notebook上实现的，pyvista对于jupyter notebook有较好的支持。
import pyvista as pv
sphere = pv.Sphere()
sphere.plot(jupyter_backend='static')
运行的效果如下：
pyvistaqt案例
这里是一个官方提供的弹出式窗口的绘图方案：
from threading import Thread
import time
import numpy as np
import pyvista as pv
import pyvistaqt as pvqt
from pyvista import examples
globe = examples.load_globe()
globe.point_arrays['scalars'] = np.random.rand(globe.n_points)
globe.set_active_scalars('scalars')
plotter = pvqt.BackgroundPlotter()
plotter.add_mesh(globe, lighting=False, show_edges=True, texture=True, scalars='scalars')
plotter.view_isometric()
# shrink globe in the background
def shrink():
for i in range(50):
globe.points *= 0.95
# Update scalars
globe.point_arrays['scalars'] = np.random.rand(globe.n_points)
time.sleep(0.5)
thread = Thread(target=shrink)
thread.start()
执行后会弹出一个pyqt的窗口如下所示：
这个图其实是一个动态图，但是qt的这个方案似乎不能在界面上直接导出gif，这一点比较可惜。不过在pyvista的接口文档中，其实是包含导出gif视频和mp4视频的，相关接口可以参考：GIF生成示例和MP4生成示例这两个案例。
多模块可视化
在pyvista里面可以用MultiBlock将相关的模块都集成起来，比如这个案例中集成了两个球体，其实使用的方法也很简单，就是把创建的对象归纳到一个列表中：
import pyvista as pv
sphere1 = pv.Sphere(radius=0.1, center=(0, 0, 0))
sphere2 = pv.Sphere(radius=0.1, center=(0, 0, 1))
data = [sphere1,sphere2]
blocks = pv.MultiBlock(data)
blocks.plot(jupyter_backend='static',show_axes=1)
生成的结果如下图所示：
需要注意的是，因为这里都还是静态图片，三维的视角不可以调整，因此如果坐标设置不当的话，有可能导致两个球体的视角刚好重合，看起来就只有一个球体。
多模块可视化耗时
基于上述的MultiBlock，我们可以很方便的生成一大堆的数据，但是这里可视化的速率也是我们不得不考虑的一个因素，所以这里我们尝试一个1000个球体的可视化，并输出时间：
import pyvista as pv
import numpy as np
import time
start_time=time.time()
data = [pv.Sphere(radius=0.01, center=(np.random.random(), np.random.random(), np.random.random())) for i in range(1000)]
blocks = pv.MultiBlock(data)
blocks.plot(jupyter_backend='static',show_axes=1)
end_time=time.time()
print ('The time cost of ploting {} spheres is: {}s'.format(len(data),end_time-start_time))
生成的结果如下：
经过过程统计，耗时将近10s。
The time cost of ploting 1000 spheres is: 9.896512746810913s
这其实是一个比较慢的速度，让人有点担忧啊，对于一些几十万的体系，那可视化时间不得冲一天去了，这还不包含中间的时间戳。
动态画板
这里要用到我们之前安装的一个插件ipygany，可以在jupyter notebook中显示出来一个动态的画板，这样我们就可以用鼠标去拖动这个三维图，可以看不同的视角，如下是一个简单的单球体案例：
import pyvista as pv
sphere = pv.Sphere()
plotter = pv.Plotter(notebook=True)
plotter.add_mesh(sphere)
plotter.show(jupyter_backend='ipygany')
可视化效果图大概这样，只有在jupyter notebook中才能看到效果：
最后补充一个自己写的简单案例，可以在面板上画两个不同位置的三维球，使用方法是直接将两个对象加起来，这个就是python中一些魔法函数的优势了，非常的人性化：
import pyvista as pv
plotter = pv.Plotter(notebook=True)
plotter.add_mesh(pv.Sphere(radius=0.3,center=(0,0,0))+pv.Sphere(radius=0.3,center=(0,0,1)))
plotter.show(jupyter_backend='ipygany')
可视化的效果大概如下：
那么到这里，需要将的基本用例就介绍完成，后续更多的功能，大家可以自行探索。
总结概要
本文通过对pyvista这一相对“冷门”的python三维可视化工具的摸索，总结了安装与基本的使用示例，包括单模块、多模块、静态图、动态画板、gif和mp4视频的导出等。总体来说pyvista是一款渲染效果很棒的可视化软件，但是性能相对来说没有那么可观，对于规模不大的体系还是一个非常好用的工具，推荐使用。
版权声明
本文首发链接为：https://www.cnblogs.com/dechinphy/p/pyvista.html
作者ID：DechinPhy
更多原著文章请参考：https://www.cnblogs.com/dechinphy/
打赏专用链接：https://www.cnblogs.com/dechinphy/gallery/image/379634.html
腾讯云专栏同步：https://cloud.tencent.com/developer/column/91958