[sldev] Re: [VWR] [PATCH] particles VWR-418 VWR-983 VWR-2164 (Tofu Linden)

[Argent Stonecutter]

On 17-Sep-2007, at 10:31, Dirk Moerenhout wrote:
>> I didn't catch this before, or parsed it as "particles that are too
>> small to be seen".

> More specifically it's "Particles that are so small they are not seen
> unless they are within 25cm of the camera position".

Ah, so my original parse was correct. :)

What I was doing was based on a minimum screen area per particle  
based on size and distance. Not an absolute size. I was tryingto make  
some existing distance-based culling work a bit better. This seems to  
be a completely different issue: I suspect that the particle systems  
you're culling are actually ones that were created by a common  
mistaken workaround for an update bug a while back that broke turning  
off particle systems with "llParticleSystem([])" in child prims.

>> Does this fix the "flashing" bug where particles that have follow-
>> source set are generated as if they didn't have follow-source set
>> then *snap* to the source the first time they're updated? That one is
>> really frustrating.

> It might but I don't recall having a specific test object for this.
> Can you provide one? If it's not fixed I'll check what is causing it
> and fix it.

I'll give you a copy of some particle wings that show the effect, in- 
world. They did NOT "shed feathers" during flying before the particle  
system optimizations that produced the flashing bug.