Re: [x3d-public] performance X3D

[Alan Hudson <giles@yumetech.com>]

bleue@gmx.de wrote:

> Hi ,
>
>
>  I would like to ask you :
>
>
>  1. do you know methods to store fps in a file in X3D?
>  
not sure what you mean.  There is an SAI method called 
getCurrentFrameRate which will return the current FPS.

>  2. do you know a paper about Performace or analysis of vrml or x3d  
>     models ?
>  
it will be very similar to other scenegraphs and somewhat specific to 
the implementation of the standard.  Each implementation makes decisions 
which greatly affect its rendering speed.  Thinks like culling stategy 
and state sorting can make a big difference.

>  3. are there linguistic constructs, kind of programming as for example
>     proto, group your etc. which you think have on influence on the  
>     performance(fps)?
>  
>  
typically spatial seperation  of your scene helps the culling systems.  
DEF/USE of geometry/appearances can help in state sorting and lower the 
amount of bus traffic.  PROTO's likely slow routing down very slightly 
but likely have no affect on rendering speed.   Lots of lights will slow 
your scene down.
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