Hi,
About the openGL limitation of 8 lights: I recently coded a small and simple
light sources manager. Its goal is to simply switch on the most important
light sources of the current RenderStage. By most important, I mean that each
source has a priority you can define (depending on the intensity, the distance
to the camera, etc.). It's NOT a way to have more than 8 lights per
RenderStage, but it simplifies some uses.
It's included in PVLE (my small game engine - http://pvle.sourceforge.net/ )
and used in a tiny game (Paratrooper -
http://sukender.free.fr/paratrooper/index_en.php ).
The code is rather independant of the engine ; so feel free to use the
LightSourceManager from the code. Just also feel free to send back improvements
and potential fixes!...
Sincerely,
Sukender
PS: for example, in the game, there are 2 global lights (always on) and
explosions and flares. When explosions + flares 6, the manager switches off
the less intense lights.
Browse for PVLE sources : http://pvle.svn.sourceforge.net/viewvc/pvle/
Last LightSourceManager header :
http://pvle.svn.sourceforge.net/viewvc/pvle/trunk/Include/PVLE/3D/LightSourceManager.h?view=markup
Le Fri, 24 Oct 2008 10:33:53 +0200, Robert Osfield [EMAIL PROTECTED] a écrit:
HI Kevin,
RIght now the way to do multiple lights is to use the OpenGL hardware
lights GL_LIGHT0... GL_LIGHT7, must this is limited just one entry per
light per RenderStage. To scale up to more lights than 8 then you
have use tricks with multiple RenderStage. This topics is rather
complex and has been discussed on osg-users alot previously so please
search the archives for info on it.
Robert.
On Fri, Oct 24, 2008 at 8:59 AM, Kévin FAURE [EMAIL PROTECTED] wrote:
Hi everyone,
I have a problem with light. Later, my scene should be consist of a
multitude of planetary system each lit by a light, and for this reason that
I would have several light0.
I have also seen the project osgmanylights but this method doesn't suit
me.
For now, I have done a very simple osg file which display four spheres,
two on the left side of the scene and two on the right side. My two lights
are also located on both sides of the scene, each in a sphere.
I would like use many light0 in my scene but osg display only the last.
Here is a screenshot with two light0 :
a href=http://imageshack.us;img
src=http://img185.imageshack.us/img185/4232/light0sj6.png; border=0
alt=Image Hosted by ImageShack.us//abr/a
href=http://g.imageshack.us/img185/light0sj6.png/1/;img
src=http://img185.imageshack.us/img185/light0sj6.png/1/w652.png;
border=0/a
Only the last light0 (one the right) is displayed.
I have tried to understand the RenderStage and RenderBin class but for now,
still nothing...
Regards.
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