[X3D-Public] [WWW-Vrml] VisibilitySensor in LOD Level Browser Tests

John A. Stewart alex.stewart at crc.ca
Tue Sep 22 13:52:12 PDT 2009


My 0.02c. Just added some debug bits to the FreeWRL code.

> FreeWRL works initially, but once the LOD range is entered and the  
> VisibiltySensor is activated, then the VisibiltySensor
> isActive TRUE no matter what –even when the red box is out of sight  
> and out of mind.

FreeWRL uses hardware occlusion culling; when the VisibilitySensor is  
switched out; it never gets redrawn, and thus, never goes inactive. It  
needs at least one frame where it can "draw" the VisibilitySensor in  
order to see whether it is there or not.

BTW - once again, I really like your tests, even if I may not like  
reading the results; you have an interesting and refreshing grasp of  

John A. Stewart
Team Leader: Networked Virtual Reality
alex.stewart at crc.ca

Network Systems and Technologies -
         Systemes et technologies des reseaux
Communications Research Centre Canada  |
          Centre de recherches sur les communications Canada

3701 Carling Ave.  |  3701, avenue Carling
PO Box 11490, Station H  |  CP 11490, succursale H
          Ottawa ON K2H 8S2   |  Ottawa (Ontario) K2H 8S2


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