Create_png.py

#!/usr/bin/env python

# first argument is Mayavi mv file name
# then focus point coordinates : xf yf zy
# then camera angles and distance : phi theta dist
# then png file name

import mayavi
import vtk
import math
import sys

v=mayavi.mayavi()
v.root.geometry("1270x824")
v.root.update()
v.load_visualization(sys.argv[1])
v.renwin.ren.ResetCamera()

xf=float(sys.argv[2])
yf=float(sys.argv[3])
zf=float(sys.argv[4])
phi=float(sys.argv[5])/180.*math.pi
theta=float(sys.argv[6])/180.*math.pi
dist=float(sys.argv[7])
xc=xf+dist*math.cos(phi)*math.cos(theta)
yc=yf+dist*math.sin(phi)*math.cos(theta)
zc=zf+dist*math.sin(theta)

v.renwin.camera.SetPosition(xc,yc,zc)
v.renwin.camera.SetViewUp(0,0,1)
v.renwin.camera.SetFocalPoint(xf,yf,zf)
v.renwin.camera.SetClippingRange(0.001,1000)
v.renwin.Render()
v.renwin.save_png(sys.argv[8])