Nicolas wrote

> Subject: [Flightgear-devel] Patch v1 - Rain & Snow
> 
> 
> Hi,
> 
> I propose my first tries... still much work to get a good 
> implementation.
> 
> >From the README (into path) :
> -----------------------------
> 
> This first try permits to add a basic snow and rain effects 
> in using particle from OSG.
> 
> For the moment, the patch uses the METAR informations to 
> enable / disable rain or snow effects. (intensity of effects 
> is : low, meddium,
> high)
> 
> For the next release of patch :
> 1) Add the wind direction and velocity effect
> 2) it's raining cats and dogs in my plane !!! (fixed this issue)
> 3) I want to the density of effects depend on altitude. If 
> I'm higher than clouds layer, rain (or snow) is stopped...
> 4) The particle effects have to depend on the camera position.
> 5) If you have propositions... :)
> 

Just in case anyone has tried, this patch will not compile under MSVC8 - fix
is easy, just add "return true" at line 121 in precipitation.cxx (as
discussed with Nicolas over on IRC).

Although this patch has its problems, principally with transparency ordering
- cockpit canopies make the rain disappear, it is a _significant_
improvement on the existing. I would recommend its inclusion in cvs, and the
retirement of the old code.

If it is intended that there are some user-settable parameter as described
in lines 111 - 121 of the code, then they should be exposed in the property
tree (or perhaps they are redundant?) I'm sure that the next iteration will
be even better. 

Vivian



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