def record(self, event):
""" keys to record, stop, continue save clear r of figure
r t y m q
"""
if event.text == 'r':
self.r = vv.record(self.fig)
print('recording..')
if event.text == 't':
self.r.Stop()
print('stop recording')
if event.text == 'y':
self.r.Continue()
print('continue recording')
if event.text == 'q':
self.r.Clear()
print('clear recording')
if event.text == 'm': # save
if self.filename is None:
now = datetime.datetime.now()
self.filename = now.strftime(
"%Y-%m-%d_%H.%M") + '_recorded' + '.' + self.fileformat
if self.frameRate is None:
imageio.mimsave(os.path.join(self.dirsave, self.filename),
self.r.GetFrames())
else:
imageio.mimsave(os.path.join(self.dirsave, self.filename),
self.r.GetFrames(),
fps=self.frameRate)
print('Recorded movie stored')
# try the differtent render styles, for examample
# "t.renderStyle='iso'" or "t.renderStyle='ray'"
# If the drawing hangs, your video drived decided to render in software mode.
# This is unfortunately (as far as I know) not possible to detect.
# It might help if your data is shaped a power of 2.
# Get axes and set camera to orthographic mode (with a field of view of 70)
a = vv.gcf()
f = vv.gca()#fqwang
#a.camera.fov = 45
# Create colormap editor wibject.
vv.ColormapEditor(a)
rec = vv.record(f)
# Rotate camera
#fqwang
Nangles = 36
for i in range(Nangles):
f.camera.azimuth = 360 * float(i) / Nangles
if f.camera.azimuth>180:
f.camera.azimuth -= 360
f.Draw() # Tell the axes to redraw
a.DrawNow() # Draw the figure NOW, instead of waiting for GUI event loop
# Export
rec.Stop()
rec.Export('plot.swf')
# Zoom
axes.SetLimits(margin=0.0)
axes.SetLimits(margin=0.0, rangeX=(-1, 1))
# Control lighting
#axes.bgcolor='k'
# axes.light0.ambient = 0.0 # 0.2 is default for light 0
# axes.light0.diffuse = 0.0 # 1.0 is default
axes.light0.Off()
light1 = axes.lights[1]
light1.On()
light1.ambient = 0.8
light1.diffuse = 1.0
light1.isDirectional = True
light1.position = (2, -4, 2, 0)
rec = vv.record(vv.gcf())
# Timer for controlling rotation speed
timer = vv.Timer(axes, 100, False)
timer.Bind(onTimer)
timer.Start(interval=1)
app = vv.use()
app.Run()
# Output movie to gif
rec.Stop()
rec.Export('movie.gif')
# Old code that used matplotlib, which is like 10 times slower, but left in
# since visvis is discontinued
This is not an interactive example, but a script.
"""
import visvis as vv
# Create something to show, let's show a red teapot!
mesh = vv.solidTeapot()
mesh.faceColor = 'r'
# Prepare
Nangles = 36
a = vv.gca()
f = vv.gcf()
rec = vv.record(a)
# Rotate camera
for i in range(Nangles):
a.camera.azimuth = 360 * float(i) / Nangles
if a.camera.azimuth > 180:
a.camera.azimuth -= 360
a.Draw() # Tell the axes to redraw
f.DrawNow() # Draw the figure NOW, instead of waiting for GUI event loop
# Export
rec.Stop()
rec.Export('teapot.gif')
""" NOTES
A note on a.Draw()
def record(ob):
""" record(object)
Take a snapshot of the given figure or axes after each draw.
A Recorder instance is returned, with which the recording can
be stopped, continued, and exported to GIF, SWF or AVI.
"""
# establish wheter we can record that
if not isinstance(ob, (vv.BaseFigure, vv.Axes)):
raise ValueError("The given object is not a figure nor an axes.")
# create recorder
return Recorder(ob)
if __name__ == '__main__':
import time
l = vv.plot([1,2,3,1,4])
rec = vv.record(vv.gcf())
for i in range(20):
l.SetYdata([1+i/10.0, 2,3,1,4])
vv.processEvents() # Process gui events
time.sleep(0.1)
# Export to swf, gif or avi
fname = 'recordExample' # note: set location to an existing directory
for ext in ['.swf', '.gif', '.avi']:
try:
rec.Export(fname+ext)
except Exception:
print('could not do %s' % ext)
This is not an interactive example, but a script.
"""
import visvis as vv
# Create something to show, let's show a red teapot!
mesh = vv.solidTeapot()
mesh.faceColor = 'r'
# Prepare
Nangles = 36
a = vv.gca()
f = vv.gcf()
rec = vv.record(a)
# Rotate camera
for i in range(Nangles):
a.camera.azimuth = 360 * float(i) / Nangles
if a.camera.azimuth>180:
a.camera.azimuth -= 360
a.Draw() # Tell the axes to redraw
f.DrawNow() # Draw the figure NOW, instead of waiting for GUI event loop
# Export
rec.Stop()
rec.Export('teapot.gif')
