paraview-python simple code rendering obj

pvrender.py

from __future__ import print_function
from paraview.simple import *
import sys
import vtk

if(len(sys.argv) < 3):
  print('Usage: ', sys.argv[0], 'input.obj', 'output.png', '[camera.pvcc]')

reader = WavefrontOBJReader(FileName=sys.argv[1])
Show(reader)
SetViewProperties(ViewSize = [512, 512])

# set camera
if len(sys.argv) == 4:
  import xml.etree.ElementTree
  e = xml.etree.ElementTree.parse(sys.argv[3]).getroot()
  camera = GetActiveCamera()
  props = e[0]
  pos = props[0]

  def at(p, i):
    return float(p[i].attrib['value'])

  camera.SetPosition(at(props[0],0), at(props[0],1), at(props[0],2))
  camera.SetFocalPoint(at(props[1],0), at(props[1],1), at(props[1],2))
  camera.SetViewUp(at(props[2],0), at(props[2],1), at(props[2],2))

renview = GetActiveView()
renview.OrientationAxesVisibility = 0
disp_props = GetDisplayProperties()
disp_props.Opacity = 0.7

Render()
SaveScreenshot(sys.argv[2])