simgear/scene/tgdb/GroundLightManager.cxx

   1 #include <osg/Fog>
   2
   3 #include <simgear/scene/util/RenderConstants.hxx>
   4 #include "GroundLightManager.hxx"
   5
   6
   7
   8 using namespace osg;
   9
  10 namespace
  11 {
  12 StateSet* makeLightSS()
  13 {
  14     StateSet* ss = new StateSet;
  15     Fog* fog = new Fog;
  16     fog->setMode(Fog::EXP2);
  17     ss->setAttribute(fog);
  18     ss->setDataVariance(Object::DYNAMIC);
  19     return ss;
  20 }
  21 }
  22
  23 namespace simgear
  24 {
  25 GroundLightManager::GroundLightManager()
  26 {
  27     osg::Fog* fog;
  28     runwayLightSS = makeLightSS();
  29     taxiLightSS = makeLightSS();
  30     groundLightSS = makeLightSS();
  31 }
  32
  33 GroundLightManager* GroundLightManager::instance()
  34 {
  35     static ref_ptr<GroundLightManager> manager = new GroundLightManager;
  36     return manager.get();
  37 }
  38
  39 void GroundLightManager::update(const SGUpdateVisitor* updateVisitor)
  40 {
  41     osg::Fog* fog;
  42     SGVec4f fogColor = updateVisitor->getFogColor();
  43     fog = static_cast<osg::Fog*>(runwayLightSS
  44                                  ->getAttribute(StateAttribute::FOG));
  45     fog->setColor(fogColor.osg());
  46     fog->setDensity(updateVisitor->getRunwayFogExp2Density());
  47     fog = static_cast<osg::Fog*>(taxiLightSS
  48                                  ->getAttribute(StateAttribute::FOG));
  49     fog->setColor(fogColor.osg());
  50     fog->setDensity(updateVisitor->getTaxiFogExp2Density());
  51     fog = static_cast<osg::Fog*>(groundLightSS
  52                                  ->getAttribute(StateAttribute::FOG));
  53     fog->setColor(fogColor.osg());
  54     fog->setDensity(updateVisitor->getGroundLightsFogExp2Density());
  55 }
  56
  57 unsigned GroundLightManager::getLightNodeMask(const SGUpdateVisitor* updateVisitor)
  58 {
  59     unsigned mask = 0;
  60     // The current sun angle in degree
  61     float sun_angle = updateVisitor->getSunAngleDeg();
  62     if (sun_angle > 85 || updateVisitor->getVisibility() < 5000)
  63         mask |= RUNWAYLIGHTS_BIT;
  64     // ground lights
  65     if ( sun_angle > 95 )
  66         mask |= GROUNDLIGHTS2_BIT;
  67     if ( sun_angle > 92 )
  68         mask |= GROUNDLIGHTS1_BIT;
  69     if ( sun_angle > 89 )
  70         mask |= GROUNDLIGHTS0_BIT;
  71     return mask;
  72 }
  73 }