[vtkusers] vtkexporter and vtkimagefilter problem....

[Peter]

Dear all,

for generating a VRML using "vtkVRMLExporter", i found some problem,

first, without adding Modified it just generate the first screen of
the object, which behave "vtkWindowToImageFilter" when u want to
generate continuously a serial of images.

second, when i use Update in "vtkVRMLExporter" it behaves same as
Modified, but if i use Update in  "vtkWindowToImageFilter" it goes
wrong and generate only the first screen of the window.

so hereby i want to ask what acutally the difference is between
Modified and Update. i did read the manual which it interprets in a
besotted way.

and personally i feel the manual is not so user friendly. it is very
hard for a beginner to go thru.

thanks

Yours
Pan