Method prepRender

Engine/source/T3D/lightFlareData.cpp:402–618

}

void LightFlareData::prepRender(SceneRenderState *state, LightFlareState *flareState)
{
   PROFILE_SCOPE(LightFlareData_prepRender);

   const LightInfo *lightInfo = flareState->lightInfo;

   if (mIsZero(flareState->fullBrightness) ||
       mIsZero(lightInfo->getBrightness()))
   return;

   // Figure out the element count to render.
   U32 elementCount = mElementCount;
   const bool isReflectPass = state->isReflectPass();
   if (isReflectPass)
   {
      // Then we don't render anything this pass.
      if (!mRenderReflectPass)
         return;

      // Find the zero distance elements which make 
      // up the corona of the light flare.
      elementCount = 0.0f;
      for (U32 i = 0; i < mElementCount; i++)
         if (mIsZero(mElementDist[i]))
      elementCount++;
   }

   // Better have something to render.
   if (elementCount == 0)
      return;

   U32 visDelta = U32_MAX;
   F32 occlusionFade = 1.0f;
   Point3F lightPosSS;
   bool lightVisible = _testVisibility(state, flareState, &visDelta, &occlusionFade, &lightPosSS);

   //DebugDrawer::get()->drawBox(flareState->lightMat.getPosition() + Point3F(-0.5, -0.5, -0.5) * 4, flareState->lightMat.getPosition() + Point3F(0.5, 0.5, 0.5) * 4, ColorI::BLUE);

   // We can only skip rendering if the light is not 
   // visible, and it has elapsed the fade out time.
   if (mIsZero(occlusionFade) ||
      (!lightVisible && visDelta > FadeOutTime))
      return;

   const RectI &viewport = GFX->getViewport();
   Point3F oneOverViewportExtent(1.0f / (F32)viewport.extent.x, 1.0f / (F32)viewport.extent.y, 0.0f);

   lightPosSS *= oneOverViewportExtent;
   lightPosSS = (lightPosSS * 2.0f) - Point3F::One;
   lightPosSS.y = -lightPosSS.y;
   lightPosSS.z = 0.0f;

   // Determine the center of the current projection so we can converge there
   Point3F centerProj(0);
   {
      MatrixF camProjMatrix = state->getSceneManager()->getNonClipProjection();
      Point3F outCenterPos;
      RectI centerViewport = RectI(Point2I(0, 0), viewport.extent);