Created
May 7, 2012 20:42
-
-
Save jeremytrimble/2630258 to your computer and use it in GitHub Desktop.
Trying to write a fast plot in matplotlib.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# Copyright 2012 Jeremy Trimble | |
import wx | |
from matplotlib.figure import Figure | |
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas | |
import numpy as np | |
from math import sqrt | |
import time | |
import types | |
class AnimatedPlotPanel(wx.Panel): | |
def __init__(self, parent, *args, **kwargs): | |
wx.Panel.__init__(self, parent) | |
self.background = None | |
self.backgroundValid = False | |
self.midground = None | |
self.midElements = [] | |
self.midgroundValid = False | |
self.foreElements = [] | |
self.createUI() | |
self.canvas.mpl_connect('resize_event', self.onResize) | |
def createUI(self): | |
self.fig = Figure( (6,4), 100 ) | |
self.canvas = FigureCanvas( self, wx.ID_ANY, self.fig ) | |
self.ax = self.fig.add_subplot(111) | |
self.ax.set_rasterized(True) | |
self.ax.set_autoscale_on(False) | |
self.ax.set_xticks([]) | |
self.ax.set_yticks([]) | |
self.ax.grid(True) | |
(self.trace,) = self.ax.plot(np.arange(5), np.arange(5), animated=True) | |
self.midElements.append( (None, self.trace) ) | |
self.canvas.draw() | |
sizer = wx.FlexGridSizer(cols=1) | |
sizer.AddGrowableRow(0); sizer.AddGrowableCol(0); | |
sizer.Add( self.canvas, flag=wx.EXPAND ) | |
self.SetSizer(sizer) | |
def onResize(self, event): | |
self.backgroundValid = False | |
self.midgroundValid = False | |
def onMouseMove(self, event): | |
if event.xdata is not None: | |
xpoints = self.trace.get_xdata() | |
xClosestIdx = np.abs(xpoints-event.xdata).argmin() | |
def setXBounds(self, xbounds): | |
assert( len(xbounds) == 2 ) | |
self.ax.set_xlim( xbounds ) | |
self.backgroundValid = False | |
def setYBounds(self, ybounds): | |
assert( len(ybounds) == 2 ) | |
self.ax.set_ylim( ybounds ) | |
def setXTicks(self, xticks): | |
self.ax.set_xticks(xticks) | |
self.backgroundValid = False | |
def setYTicks(self, yticks): | |
self.ax.set_yticks(yticks) | |
self.backgroundValid = False | |
def setTraceData(self, newData): | |
self.trace.set_xdata(np.arange(len(newData))) | |
self.trace.set_ydata(newData) | |
self.midgroundValid = False | |
def drawBackground(self): | |
if self.backgroundValid: | |
self.canvas.restore_region(self.background) | |
return | |
else: | |
self.canvas.draw() | |
self.background = self.canvas.copy_from_bbox(self.ax.bbox) | |
self.backgroundValid = True | |
def drawMidground(self): | |
self.drawBackground() | |
if self.midgroundValid: | |
self.canvas.restore_region(self.midground) | |
return | |
else: | |
for (setupFunc, element) in self.midElements: | |
if setupFunc: | |
setupFunc(element) | |
self.ax.draw_artist(element) | |
self.canvas.blit(self.ax.bbox) | |
self.midground = self.canvas.copy_from_bbox(self.ax.bbox) | |
self.midgroundValid = True | |
def drawAll(self): | |
self.drawMidground() | |
for (setupFunc, element) in self.foreElements: | |
if setupFunc: | |
setupFunc(element) | |
self.ax.draw_artist(element) | |
self.canvas.blit(self.ax.bbox) | |
class TestFrame(wx.Frame): | |
instance = None | |
def __init__(self, *args, **kwargs): | |
wx.Frame.__init__(self, title="Test Frame", *args, **kwargs) | |
self.createUI() | |
REFRESH_FPS = 45 # Reduce this if performance is poor | |
self.TIMER_INTERVAL = 1000.0/REFRESH_FPS | |
self.frameDecCounter = 0 | |
self.fpsPeriodBegin = time.time() | |
self.fpsFramesInPeriod = 0 | |
timerId = wx.NewId() | |
self.timer = wx.Timer(self, timerId) | |
self.Bind(wx.EVT_TIMER, self.onTimer, id=timerId) | |
self.timer.Start(self.TIMER_INTERVAL, wx.TIMER_ONE_SHOT) | |
self.apf.setXTicks( np.arange(0,501, 100) ) | |
self.apf.setYTicks( np.arange(-6,6.1,0.5) ) | |
def createUI(self): | |
panel = self | |
self.apf = AnimatedPlotPanel(panel, -1) | |
sizer = wx.FlexGridSizer(cols=1) | |
sizer.AddGrowableRow(0); sizer.AddGrowableCol(0); | |
sizer.Add( self.apf, flag=wx.EXPAND ) | |
self.SetSizer(sizer) | |
def onTimer(self, evt): | |
self.apf.setTraceData( np.random.randn(500) ) | |
self.apf.drawAll() | |
self.fpsFramesInPeriod += 1 | |
curTime = time.time() | |
if curTime > self.fpsPeriodBegin+3: | |
deltaT = (curTime - self.fpsPeriodBegin) | |
fps = self.fpsFramesInPeriod / float(deltaT) | |
self.fpsPeriodBegin = time.time() | |
self.fpsFramesInPeriod = 0 | |
print "FPS: %f" % fps | |
self.timer.Start(self.TIMER_INTERVAL, wx.TIMER_ONE_SHOT) | |
if __name__ == '__main__': | |
app = wx.PySimpleApp() | |
frame = TestFrame(None, size=(900,500)) | |
app.SetTopWindow(frame) | |
frame.Show() | |
app.MainLoop() | |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment