vcs 3D rotating globe animation not working properly

[davis278]

While running the example code on the VCS 3D Animation Tutorial (https://cdat.llnl.gov/Jupyter-notebooks/vcs/Animations/Animations.html), Example 3: Rotating Globe, the animation that is created is not right. A red square in the attached screenshot highlights what seems to be a portion of the globe in the lower left corner of the window. Previously, the globe was centered in the middle of the view.

The code I used to create the animation is the following (updated to Python 3 from the Python 2 code in the example on the Tutorial page listed above - Python 2 code commented out):

import requests
r = requests.get("https://uvcdat.llnl.gov/cdat/sample_data/clt.nc",stream=True)
with open("clt.nc","wb") as f:
for chunk in r.iter_content(chunk_size=1024):
if chunk: # filter local_filename keep-alive new chunks
f.write(chunk)

import cdms2
f=cdms2.open("clt.nc")
clt=f("clt",time=slice(0,1),longitude=(0,361),squeeze=1) # Read the time slice and squeeze it out

make directory for pngs if not present

import os
if not os.path.exists("pngs"):
os.makedirs("pngs")

import vcs

create new canvas

x = vcs.init(bg=True)

Create projection

polar = vcs.createprojection("rotate")
polar.type = "orthographic"
polar.centerlongitude=0.
polar.centerlatitude=45.

Create isofill method

iso = vcs.createisofill()

#iso.levels = range(0,110,10)
iso.levels = list(range(0,110,10))

#iso.fillareacolors = vcs.getcolors(range(0,110,10))
iso.fillareacolors = vcs.getcolors(list(range(0,110,10)))

iso.projection = polar

for centerLongitude in range(0,366,5):
polar.centerlongitude = centerLongitude
x.clear()
x.plot(clt,iso)
x.png("pngs/rotate_%s.png" % str(centerLongitude).zfill(6))

import glob
name = "rot_animation.mp4"

Create animation into file

#print "files used",glob.glob("pngs/rotate_*png")
print ("files used",glob.glob("pngs/rotate_*png"))
x.ffmpeg(name,sorted(glob.glob("pngs/rotate_*png")), rate=15)

[doutriaux1]

@danlipsa this is actually a super high priority, please focus on this first.

[danlipsa]

@doutriaux1 Sounds good. I'll take a look at it tomorrow.

[danlipsa]

@doutriaux1 It is the projection that causes the problem. boxfill works correctly.

[doutriaux1]

@danlipsa you mean the same proj on boxfill works? So it's proj+isofill?

[danlipsa]

Yes, that is correct.

…

On Mon, Jun 3, 2019 at 5:59 PM Charles Doutriaux ***@***.***> wrote: @danlipsa <https://github.com/danlipsa> you mean the same proj on boxfill works? So it's proj+isofill? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#409?email_source=notifications&email_token=ABPE65Z2NGR3BW2B4LIELPLPYWH4RA5CNFSM4HRJPLDKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODW22BEY#issuecomment-498442387>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABPE65ZVJDFOTJLGK4EVZU3PYWH4RANCNFSM4HRJPLDA> .

[doutriaux1]

Thx. Sounds like a vtk issue then. @scottwittenburg I don't think you did anything special for isofill right?

[cdatrobot]

It is strange that isofill works for other projections that show the globe rounds (such as -3 which is tested) but does not work for "orthographic". But it hard to say where the problem comes from. I'll know more later today.

…

On Tue, Jun 4, 2019 at 10:01 AM Charles Doutriaux ***@***.***> wrote: Thx. Sounds like a vtk issue then. @scottwittenburg <https://github.com/scottwittenburg> I don't think you did anything special for isofill right? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#409?email_source=notifications&email_token=AEW527AIYOAYAI6HF4GUQFLPYZYTDA5CNFSM4HRJPLDKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODW4VETY#issuecomment-498684495>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEW527DHNBEKVNKYXKB5J73PYZYTDANCNFSM4HRJPLDA> .

[danlipsa]

getProjectedBoundsForWorldCoords in vcs returns infinity for one of the coordinates for this projection. I should have a fix today.

[scottwittenburg]

Thx. Sounds like a vtk issue then. @scottwittenburg I don't think you did anything special for isofill right?

@doutriaux1 I don't think I did anything special there. However, there were always some special cases I didn't quite understand for various pieces of work (getting plotting bounds, wrapping the grid, etc...) which I just had to leave the way they were, because trying to change them broke everything.

[danlipsa]

Fix in
#411

[danlipsa]

Fix has been merged in master.