Hi there!
Maybe I missed something, but under OSG/opengl it should be able to
create up to 8 light sources.
I used some simple osg code to generate a spotlight but it works only if
I define it as light_num 0, which corresponds the GL_LIGHT0 of opengl I
suppose, and this setting causes generic lightning to dissappear.
Now some questions to someone with more insight into OSG:
Is it possible to add lights when modifying the code below or is there a
current limitation in flightgear that prevent lights from being added?
I had a quick look into renderer.cxx and it seems that our global
lighting is linked with osg there, but I am no programmer and I don't
know how our lighting system actually works.
Here the code I used (when GL_LIGHT1 and light_num 1 were used,nothing
appeared):
LightSource {
UniqueID LightSource_2
DataVariance STATIC
nodeMask 0xffffff
cullingActive FALSE
StateSet {
DataVariance STATIC
rendering_hint DEFAULT_BIN
renderBinMode INHERIT
GL_LIGHTING ON
GL_LIGHT0 ON
GL_DEPTH_TEST ON
}
referenceFrame RELATIVE
Light {
UniqueID LightSource_3
DataVariance STATIC
light_num 0 //0 works but global light turned off
ambient 0.2 0.2 0.2 1
diffuse 1 1 1 1
specular 0 0 0 0
position 0 0 0 1
direction -1 0 0
constant_attenuation 1
linear_attenuation 0
quadratic_attenuation 0
spot_exponent 2
spot_cutoff 15
}
num_children 0
}
fly on,
markus
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