Frederic Bouvier:

Frederic Bouvier:

I was not very happy with the size of the halo, so
I created a new animation to control it. Now we can
control the scale value with the distance from the
viewer to the object. The towers are now beginning to
look good. They might need some tuning though. If
you want to play, locate in radio-*.xml this code :

 <animation>
  <type>dist-scale</type>
  <object-name>RedLight.2</object-name>
  <interpolation>
   <entry><ind>0</ind><dep>0.1</dep></entry>
   <entry><ind>500</ind><dep>0.3</dep></entry>
   <entry><ind>16000</ind><dep>3</dep></entry>
  </interpolation>
 </animation>

You get the idea ? ind is the distance, dep is the
resulting scale value.
The medium tower appears brighter than the tall one,
because the lights are closer to each other. Maybe
they need a smaller scale factor at distance. Feel
free to modify these values if you find a better
setup.

About the code : I renamed flash to custtrans because the
ssg branch is now less specialized. It needs a callback
to compute the so called 'custom transformation'. It can
be used for the SGFlashAnimation and the new
SGDistScaleAnimation. So please cvs remove flash.[ch]xx and
add custtrans.[ch]xx. I also undo some of the code I send
you yesterday that was totally useless. It is replaced by
something simpler and that works.

There is also a patch to matmodel.cxx. This is not related
and was something I forgot. Its purpose is to set the
alpha test on material billboard models that are likely to
be trees to lessen a transparency weird effect with clouds.