[Paraview] Ensight

[Wylie, Brian]

All,
 
Some other stuff to be a bit careful of 
(1) 'Advanced Render Parameter' under '3D View Properties'
(2) 'Cache Geometry' under 'Keyframe Animation'
 
(1) Options can have things like construct T-Strips and create display
lists, both of which are not useful for animations
(2) Cache Geometry is a double edged sword, great for 'replay', but can
chew up a lot of memory which could lead to swapping or worse
 
My recommendation is for this particular test...
    Make sure 'Use Triangle Strips' is OFF
    'Use Immediate mode rendering' is ON
    'Cache Geometry' is OFF
 
Also if you could make the test data publicly available that makes all
the difference in the world. That way if there is an issue, we can
actually do something about it. :)

Brian Wylie - Org 9227 
Sandia National Laboratories 
MS 0822 - Building 880/A1-J 
(505)844-2238 FAX(505)845-0833                       
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________________________________

	From: paraview-bounces+bnwylie=sandia.gov at paraview.org
[mailto:paraview-bounces+bnwylie=sandia.gov at paraview.org] On Behalf Of
Randall Hand
	Sent: Tuesday, March 21, 2006 9:21 AM
	To: Terry Jordan
	Cc: paraview at paraview.org
	Subject: Re: [Paraview] Ensight
	
	
	Lots of information missing here.
	1) What are you animating? Single Isovalue for multiple
timesteps?  Multiple isovalues?  
	2) What data type are you using?  Native VTK, Native Ensight, or
a 3rd party.  Each of the first two give a somewhat unfair advantage to
one product, if you're going for a truly even comparison.  
	3) What data format are you using? Structured, unstructured?
2d, 3d?
	4) What pipeline/viz tools are you using? 
	5) What exactly are you counting time for?  Data load, or just
computation?  I bet you're just timing the actual time to generate all
the isosurfaces, and Ensight gets a big win because it preloads all the
data at once where Paraview loads it as it goes. 
	
	
	
	On 3/21/06, Terry Jordan <tejj at hotmail.com> wrote: 

		We are running some test of the performance of ensight
versus paraview.  In
		the test we use the same data set and create an iso
surface (contour).  Then
		we animate the transient data set.  We are seeing about
1 order of magnitude 
		increase in performance over paraview (about 2.5 mins to
29 mins).  Does
		anyone know if ensight is doing something to speed up
the performance such
		as decimation or are their algorithms that much faster?
		
		Thanks in advance.
		
		
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	-- 
	Randall Hand
	Visualization Scientist, 
	ERDC-MSRC Vicksburg, MS
	Homepage: http://www.yeraze.com 

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