Re: [Paraview] How to re-render or update the window through python script

[Burlen Loring]

you're leaking a dataset with each iteration. You need to

Delete(reader)
del reader

each iteration.


--- original.py 2013-11-08 11:52:45.746871024 -0800
+++ fixleak.py  2013-11-08 11:56:32.226876191 -0800
@@ -15,15 +15,13 @@

 while true == 1:
     OutPutFile = OutPutLocation+'local_'+str(count).zfill(4)+'.vtk'
-
-    while exist == 0:
-        try:
-            with open(OutPutFile):
-                exist = 1
-        except IOError:
-            exist = 0
-    exist = 0
-
+    if os.path.exists(OutPutFile)
+        raise RuntimeError('File %s deosnt exist'%(OutPutFile))
+
+    if reader:
+        Delete(reader)
+        del reader
+
     reader = OpenDataFile(OutPutFile)

     reader.PointData
@@ -47,13 +45,5 @@
         cam.Elevation(30)
         cam.Azimuth(30)
         Render()
-
+
     count = count + 1
-# Stop the script killing itself
-    nOutPutFile = OutPutLocation+'local_'+str(count).zfill(4)+'.vtk'
-    while exist == 0:
-        try:
-            with open(nOutPutFile):
-                exist = 1
-        except IOError:
-            exist = 0


On 11/08/2013 10:34 AM, Junyi Han wrote:

Hi,

Thanks for your reply. Below is my script:


'''
Created on 29 Oct 2013

@author: Junyi Han
'''
from paraview.simple import *

PVServer = 'localhost'
OutPutLocation = '/home/johnny/Application/DPD/myDPD-PVersion/'
exist = 0
count = 0
true = 1

Connect(PVServer)

while true == 1:
    OutPutFile = OutPutLocation+'local_'+str(count).zfill(4)+'.vtk'
    while exist == 0:
        try:
            with open(OutPutFile):
                exist = 1
        except IOError:
            exist = 0
    exist = 0
    reader = OpenDataFile(OutPutFile)

    reader.PointData
    view = GetRenderView()

    dp = GetDisplayProperties()
    dp.Representation = 'Surface'

    readerRep = GetRepresentation()
    readerRep.ColorArrayName = 'density_01'

# Force read
    reader.UpdatePipeline()

    Show(reader)
    Render()

# Get a nice view angle
    if count == 0:
        cam = GetActiveCamera()
        cam.Elevation(30)
        cam.Azimuth(30)
        Render()
    count = count + 1
# Stop the script killing itself
    nOutPutFile = OutPutLocation+'local_'+str(count).zfill(4)+'.vtk'
    while exist == 0:
        try:
            with open(nOutPutFile):
                exist = 1
        except IOError:
            exist = 0



2013/11/8 Burlen Loring <blor...@lbl.gov <mailto:blor...@lbl.gov>>

    it sounds like what happens when one leaks datasets, filters, or
    other vtk objects that hold large amounts of data. Could you share
    your script?


    On 11/08/2013 09:55 AM, Junyi Han wrote:

    Hi,

    I'm using python script to read data files. Render() function is
    called as many times as the number of files. I found that after I
    call render() for 40 or 50 times, the speed of rendering is very
    slow. Is there a way to solve it? Instead of calling Render()
    function several times, is there a way to update or re-render?

    Best wishes,
    Junyi Han


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