[Flightgear-devel] Shader question

[Frederic B. <fre...@fr...>]

Hi Tim,

is there a way to have the value of an uniform updated every frame by
the value of a live property ?

I used :

  <parameters>
    <sun-angle><use>/sim/time/sun-angle-rad</use></sun-angle>
  </parameters>

and then, in pass

      <uniform>
        <name>sun_angle</name>
        <type>float</type>
        <value><use>sun-angle</use></value>
      </uniform>

According to README.effect, the value should dynamically change but my
shader variable stay at 0.0.
The readme also says [NOT IMPLEMENTED YET], but it is unclear to me what
in not implemented : the copy of a value from the global property tree
to a uniform, or the copy from a local property, or both ?

Regards,
-Fred