Method prepRenderImage

Engine/source/environment/VolumetricFog.cpp:977–1063

}

void VolumetricFog::prepRenderImage(SceneRenderState *state)
{
   if (!mShapeLoaded || mFogDensity <= 0.0f || mResizing)
      return;

   if (!state->isDiffusePass())
   {
      if (!state->isReflectPass())
      return;
   }
   
   PROFILE_SCOPE(VolumetricFog_prepRenderImage);

   ShapeBase* control = dynamic_cast<ShapeBase*>(conn->getControlObject());
   if (!control || (control->getWaterCoverage() >= 0.9f && !mIgnoreWater))
      return;

   camPos = state->getCameraPosition();
   F32 dist = (camPos - getBoxCenter()).len();
   F32 scaleFactor = dist * mInvScale;
   if (scaleFactor <= 0.0f)
   {
      if (mCurDetailLevel != 0)
         UpdateBuffers(0);
   }
   const F32 pixelScale = state->getViewport().extent.y / 300.0f;

   mPixelSize = (mRadius / scaleFactor) * state->getWorldToScreenScale().y * pixelScale;
   if (mPixelSize < mMinDisplaySize)
      return;
   if (mNumDetailLevels > 1)
   {
      if ((mCurDetailLevel < mNumDetailLevels - 1) && (det_size[mCurDetailLevel].det_size > mPixelSize))
         UpdateBuffers(mCurDetailLevel + 1);
      else if (mCurDetailLevel > 0)
      {
         if (mPixelSize >= det_size[mCurDetailLevel - 1].det_size)
            UpdateBuffers(mCurDetailLevel - 1);
      }
   }

   if (state->isReflectPass() && mReflect)
   {
      ObjectRenderInst *ri = state->getRenderPass()->allocInst<ObjectRenderInst>();
      ri->renderDelegate.bind(this, &VolumetricFog::reflect_render);
      ri->type = RenderPassManager::RIT_VolumetricFog;
      ri->translucentSort = true;
      ri->sortDistSq = getRenderWorldBox().getSqDistanceToPoint(camPos);
      if (dist < 1.0f)
         ri->defaultKey = 1;
      else
         ri->defaultKey = U32(dist);
      state->getRenderPass()->addInst(ri);
      return;
   }
   else if (state->isDiffusePass())
   {
      viewDist = state->getFarPlane();