Method updatePriority

Engine/source/lighting/shadowMap/lightShadowMap.cpp:386–428

}

void LightShadowMap::updatePriority( const SceneRenderState *state, U32 currTimeMs )
{
   PROFILE_SCOPE( LightShadowMap_updatePriority );

   mLastCull = currTimeMs;

   if ( isViewDependent() )
   {
      mLastScreenSize = 1.0f;
      mLastPriority = F32_MAX;
      return;
   }

   U32 timeSinceLastUpdate = currTimeMs - mLastUpdate;

   const Point3F &camPt = state->getCameraPosition();
   F32 range = mLight->getRange().x;
   F32 dist;

   if ( mLight->getType() == LightInfo::Spot )
   {
      // We treat the cone as a cylinder to get the
      // approximate projection distance.

      Point3F endPt = mLight->getPosition() + ( mLight->getDirection() * range );
      Point3F nearPt = MathUtils::mClosestPointOnSegment( mLight->getPosition(), endPt, camPt );
      dist = ( camPt - nearPt ).len();

      F32 radius = range * mSin( mDegToRad( mLight->getOuterConeAngle() * 0.5f ) );
      dist -= radius;
   }
   else
      dist = SphereF( mLight->getPosition(), range ).distanceTo( camPt );

   // Get the approximate screen size of the light.
   mLastScreenSize = state->projectRadius( dist, range );
   mLastScreenSize /= state->getViewport().extent.y;

   // Update the priority.
   mLastPriority = mPow( mLastScreenSize * 50.0f, 2.0f );   
   mLastPriority += timeSinceLastUpdate;
   mLastPriority *= mLight->getPriority();
}

S32 QSORT_CALLBACK LightShadowMap::cmpPriority( LightShadowMap *const *lsm1, LightShadowMap *const *lsm2 )
{