连续 3D 绘图(即图形更新)
我有一个模拟,它计算模拟每次迭代的表面数据。 我想连续将该数据作为曲面图绘制到同一窗口(在每次迭代中更新该图),以便查看它如何演变并检查算法。
我的想法是创建一个类来初始化窗口/绘图,然后从模拟循环内部重绘到该窗口。这是我想出的类:
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
from matplotlib import cm
from matplotlib.ticker import LinearLocator, FixedLocator, FormatStrFormatter
import matplotlib
matplotlib.interactive( False )
class plot3dClass( object ):
def __init__( self, systemSideLength, lowerCutoffLength ):
self.systemSideLength = systemSideLength
self.lowerCutoffLength = lowerCutoffLength
self.fig = plt.figure()
self.ax = self.fig.add_subplot( 111, projection='3d' )
self.ax.set_zlim3d( -10e-9, 10e9 )
X = np.arange( 0, self.systemSideLength, self.lowerCutoffLength )
Y = X
self.X, self.Y = np.meshgrid(X, Y)
self.ax.w_zaxis.set_major_locator( LinearLocator( 10 ) )
self.ax.w_zaxis.set_major_formatter( FormatStrFormatter( '%.03f' ) )
heightR = np.zeros( self.X.shape )
self.surf = self.ax.plot_surface( self.X, self.Y, heightR, rstride=1, cstride=1, cmap=cm.jet, linewidth=0, antialiased=False )
#~ self.fig.colorbar( self.surf, shrink=0.5, aspect=5 )
plt.show()
def drawNow( self, heightR ):
self.surf = self.ax.plot_surface( self.X, self.Y, heightR, rstride=1, cstride=1, cmap=cm.jet, linewidth=0, antialiased=False )
plt.draw() # redraw the canvas
time.sleep(1)
这段代码的问题是,代码在“plt.show()”处停止,只有当我关闭绘图窗口时才会继续。另外,我不确定“self.ax.plot_surface( ... )”和“plt.draw()”的调用是否会按照我的意愿更新图形。
那么这个课程的方向是正确的吗?
如果是:需要进行哪些修改?
如果没有:有人可以给我建议如何实现我想要的吗?
我意识到这个问题对其他人来说似乎微不足道,但我(老实说)昨天确实花了一整天的时间在谷歌上尝试,但我不知所措......
任何帮助将不胜感激,以便我可以回到我的实际工作。
坦克提前很多。
作为参考:
我还发现以下代码可以实现我想要的功能,但它是二维的,所以它不能直接帮助我:
from pylab import *
import time
ion()
tstart = time.time() # for profiling
x = arange(0,2*pi,0.01) # x-array
line, = plot(x,sin(x))
for i in arange(1,200):
line.set_ydata(sin(x+i/10.0)) # update the data
draw() # redraw the canvas
print 'FPS:' , 200/(time.time()-tstart)
I have a simulation which calculates surface data for each iteration of the simulation.
I would like to continuously plot that data as a surface plot to the same window (updating the plot in each iteration) in order to see how it evolves and to check the algorithm.
My Idea was to create a class that would initialize the window/plot and then redraw to that window from inside the simulation loop. Here is the class I came up with:
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
from matplotlib import cm
from matplotlib.ticker import LinearLocator, FixedLocator, FormatStrFormatter
import matplotlib
matplotlib.interactive( False )
class plot3dClass( object ):
def __init__( self, systemSideLength, lowerCutoffLength ):
self.systemSideLength = systemSideLength
self.lowerCutoffLength = lowerCutoffLength
self.fig = plt.figure()
self.ax = self.fig.add_subplot( 111, projection='3d' )
self.ax.set_zlim3d( -10e-9, 10e9 )
X = np.arange( 0, self.systemSideLength, self.lowerCutoffLength )
Y = X
self.X, self.Y = np.meshgrid(X, Y)
self.ax.w_zaxis.set_major_locator( LinearLocator( 10 ) )
self.ax.w_zaxis.set_major_formatter( FormatStrFormatter( '%.03f' ) )
heightR = np.zeros( self.X.shape )
self.surf = self.ax.plot_surface( self.X, self.Y, heightR, rstride=1, cstride=1, cmap=cm.jet, linewidth=0, antialiased=False )
#~ self.fig.colorbar( self.surf, shrink=0.5, aspect=5 )
plt.show()
def drawNow( self, heightR ):
self.surf = self.ax.plot_surface( self.X, self.Y, heightR, rstride=1, cstride=1, cmap=cm.jet, linewidth=0, antialiased=False )
plt.draw() # redraw the canvas
time.sleep(1)
The problem I have with this code, is that the code stops at the 'plt.show()' and only continues, when I close the plot-window. Also I am not sure if the calls of 'self.ax.plot_surface( ... )' and 'plt.draw()' would update the figure as I would like it.
So is this class the right direction?
If yes: What modifications are needed?
If not: Could somebody please give me advice how to achieve what I want?
I realize that this problem might seem trivial to others, but I (honestly) did spend the whole day yesterday on Google and trying and I'm at a loss...
Any help would greatly appreciated, so that I can get back to my actual work.
Tanks alot in advance.
As a reference:
I also found the following code which does, what I want, but it is in 2D, so it does not help me directly:
from pylab import *
import time
ion()
tstart = time.time() # for profiling
x = arange(0,2*pi,0.01) # x-array
line, = plot(x,sin(x))
for i in arange(1,200):
line.set_ydata(sin(x+i/10.0)) # update the data
draw() # redraw the canvas
print 'FPS:' , 200/(time.time()-tstart)
如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱,如果其他用户或者作者回复了您的评论,将不能在第一时间通知您!
发布评论
评论(3)
如果它是动画(交互式)绘图,则不需要
plt.show()
。您还希望将 Interactive 设置为 True,而不是 False,这与在 2d 示例中调用ion()
相同。另外,如果您不想看到全部曲面图,则需要从之前的帧中remove()
删除它们。否则你已经很接近了。
这对我有用:
You do not need to
plt.show()
if it is an animated (interactive) plot. You also want interactive set to True, not False which is the same as callingion()
in your 2d example. Also, you need toremove()
the surface plots from previous frames if you do not want to see them all.Otherwise you were pretty close.
This works for me:
我遇到了类似的问题,这对我有用:
对于你来说,我想解决方案类似于 最上面的答案,除了用
plt.pause()
替换time.sleep()
,这会在睡觉前完成图形的绘制。I had a similar problem and this worked for me:
For you, I'd imagine the solution be something similar to the top answer except replacing
time.sleep()
withplt.pause()
, which would finish the drawing the figure before sleeping.我很感谢保罗的回答,尽管我还没有尝试过。
与此同时,我找到了另一个可以使用 MayaVI 与 OpenGL 一起工作和渲染的解决方案,这很好,因为我只需要实时快速的视觉反馈。但是,我必须在 Ubuntu 下安装以下软件包: python-enthoughtbase 和 mayavi2
这是代码:
这个类并不完全是我想要的位置,并且我有两个直接的问题:
我会尝试在另一个线程中得到这些答案。
编辑:
好的。我刚刚尝试了保罗建议的代码,它也适用于我。然而,尝试后我发现 MatPlotLib 可能不是实时制作动画的最佳选择。至少对我来说它非常慢(也许只在 3D 中?)。
所以最后我会坚持使用上面的 MayaVI 实现,除了提到的两点之外,它的效果很好。
编辑:如果您使用MatPlotLib解决方案,我发现您可以将行
matplotlib.interactive(True)
放在绘图类的声明中。这样您就可以仅在绘图类中定义 MatPlotLib。I am grateful for the answer from Paul, although I haven't to tried it out yet.
In the meantime I had found another solution that works and renders with OpenGL using MayaVI, which is OK as I only need real-time quick visual feedback. However I had to install the following packages under Ubuntu: python-enthoughtbase and mayavi2
Here's the code:
This class is not quite where I would like it to be and I have two immediate issues with it:
I will try getting these answered in another thread.
EDIT:
Ok. I have just tried the code as suggested by Paul and it also works for me. However, trying it I have become aware that MatPlotLib probably is not the best choice for doing animations in real-time. At least for me it is extremely slow (perhaps only in 3D?).
So in the end I will stick with the MayaVI implementation from above, which except for the two points mentioned, works great.
EDIT: If you go with the MatPlotLib solution, I have found that you can put the line
matplotlib.interactive(True)
inside the declaration of the plotting class. That way you can have MatPlotLib only defined within the plotting class.