C++ RenderPassManager类代码示例

void GroundPlane::prepRenderImage( SceneRenderState* state )
{
   PROFILE_SCOPE( GroundPlane_prepRenderImage );
   
   // TODO: Should we skip rendering the ground plane into
   // the shadows?  Its not like you can ever get under it.

   if ( !mMaterial )
      return;

   // If we don't have a material instance after the override then 
   // we can skip rendering all together.
   BaseMatInstance *matInst = state->getOverrideMaterial( mMaterial );
   if ( !matInst )
      return;

   PROFILE_SCOPE( GroundPlane_prepRender );

   // Update the geometry.
   createGeometry( state->getCullingFrustum() );
   if( mVertexBuffer.isNull() )
      return;

   // Add a render instance.

   RenderPassManager*   pass  = state->getRenderPass();
   MeshRenderInst*      ri    = pass->allocInst< MeshRenderInst >();

   ri->type                   = RenderPassManager::RIT_Mesh;
   ri->vertBuff               = &mVertexBuffer;
   ri->primBuff               = &mPrimitiveBuffer;
   ri->prim                   = &mPrimitive;
   ri->matInst                = matInst;
   ri->objectToWorld          = pass->allocUniqueXform( MatrixF::Identity );
   ri->worldToCamera          = pass->allocSharedXform( RenderPassManager::View );
   ri->projection             = pass->allocSharedXform( RenderPassManager::Projection );
   ri->visibility             = 1.0f;
   ri->translucentSort        = matInst->getMaterial()->isTranslucent();
   ri->defaultKey             = matInst->getStateHint();

   if( ri->translucentSort )
      ri->type = RenderPassManager::RIT_Translucent;

	// If we need lights then set them up.
   if ( matInst->isForwardLit() )
   {
      LightQuery query;
      query.init( getWorldSphere() );
		query.getLights( ri->lights, 8 );
   }

   pass->addInst( ri );
}

void TSLastDetail::render( TSRenderState &rdata, F32 alpha )
{
#if 0
   // Early out if we have nothing to render.
   if (  alpha < 0.01f || 
         !mMatInstance ||
         mMaterial->mImposterUVs.size() == 0 )
      return;

   const MatrixF &mat = GFX->getWorldMatrix();

   // Post a render instance for this imposter... the special
   // imposter render manager will do the magic!
   RenderPassManager *renderPass = rdata.getSceneState()->getRenderPass();

   ImposterRenderInst *ri = renderPass->allocInst<ImposterRenderInst>();
   ri->mat = rdata.getSceneState()->getOverrideMaterial( mMatInstance );

   ri->state.alpha = alpha;

   // Store the up and right vectors of the rotation
   // and we'll generate the up vector in the shader.
   //
   // This is faster than building a quat on the
   // CPU and then rebuilding the matrix on the GPU.
   //
   // NOTE: These vector include scale.
   //
   mat.getColumn( 2, &ri->state.upVec );
   mat.getColumn( 0, &ri->state.rightVec );

   // We send the unscaled size and the vertex shader
   // will use the orientation vectors above to scale it.
   ri->state.halfSize = mRadius;

   // We use the center of the object bounds for
   // the center of the billboard quad.
   mat.mulP( mCenter, &ri->state.center );

   // We sort by the imposter type first so that RIT_Imposter and s
   // RIT_ImposterBatches do not get mixed together.
   //
   // We then sort by material.
   //
   ri->defaultKey = 1;
   ri->defaultKey2 = ri->mat->getStateHint();

   renderPass->addInst( ri );
#endif
}

RenderPrePassMgr* LightManager::_findPrePassRenderBin()
{
   RenderPassManager* rpm = getSceneManager()->getDefaultRenderPass();
   for( U32 i = 0; i < rpm->getManagerCount(); i++ )
   {
      RenderBinManager *bin = rpm->getManager( i );
      if( bin->getRenderInstType() == RenderPrePassMgr::RIT_PrePass )
      {
         return ( RenderPrePassMgr* ) bin;
      }
   }

   return NULL;
}

bool GroundPlane::prepRenderImage( SceneState* state, const U32 stateKey, const U32, const bool )
{
   PROFILE_SCOPE( GroundPlane_prepRenderImage );
   
   if( isLastState( state, stateKey ) )
      return false;

   setLastState( state, stateKey );

   if( !state->isObjectRendered( this )
       || !mMaterial )
      return false;

   PROFILE_SCOPE( GroundPlane_prepRender );

   // Update the geometry.
   createGeometry( state->getFrustum() );
   if( mVertexBuffer.isNull() )
      return false;

   // Add a render instance.

   RenderPassManager*   pass  = state->getRenderPass();
   MeshRenderInst*      ri    = pass->allocInst< MeshRenderInst >();

   ri->type                   = RenderPassManager::RIT_Mesh;
   ri->vertBuff               = &mVertexBuffer;
   ri->primBuff               = &mPrimitiveBuffer;
   ri->prim                   = &mPrimitive;
   ri->matInst                = mMaterial;
   ri->objectToWorld          = pass->allocUniqueXform( mRenderObjToWorld );
   ri->worldToCamera          = pass->allocSharedXform(RenderPassManager::View);
   ri->projection             = pass->allocSharedXform(RenderPassManager::Projection);
   ri->visibility             = 1.0f;
   ri->translucentSort        = ( ri->matInst->getMaterial()->isTranslucent() );
   // NOTICE: SFXBB is removed and refraction is disabled!
   //ri->backBuffTex            = GFX->getSfxBackBuffer();
   ri->defaultKey             = ( U32 ) mMaterial;

   // TODO: Get the best lights for the plane in a better
   // way.... maybe the same way as we do for terrain?
   ri->lights[0] = state->getLightManager()->getDefaultLight();

   if( ri->translucentSort )
      ri->type = RenderPassManager::RIT_Translucent;

   pass->addInst( ri );

   return true;
}

void EditTSCtrl::renderWorld(const RectI & updateRect)
{
   // Make sure that whatever the editor does, it doesn't
   // dirty the GFX transform state.
   GFXTransformSaver saver;

   updateGizmo();

   gClientSceneGraph->setDisplayTargetResolution(getExtent());

   // Use a render instance to do editor 3D scene 
   // rendering after HDR is processed and while the depth 
   // buffer is still intact.
   RenderPassManager *rpm = gClientSceneGraph->getDefaultRenderPass();
   ObjectRenderInst *inst = rpm->allocInst<ObjectRenderInst>();
   inst->type = RenderPassManager::RIT_Editor;
   inst->renderDelegate.bind(this, &EditTSCtrl::_renderScene);
   rpm->addInst(inst);

   if( mDisplayType == DisplayTypePerspective )
      gClientSceneGraph->renderScene( SPT_Diffuse );
   else
   {
      // If we are in an orthographic mode, do a special render
      // with AL, fog, and PostFX disabled.

      FogData savedFogData = gClientSceneGraph->getFogData();
      gClientSceneGraph->setFogData( FogData() );

      SceneRenderState renderState
      (
         gClientSceneGraph,
         SPT_Diffuse
      );

      gClientSceneGraph->renderScene( &renderState );
      gClientSceneGraph->setFogData( savedFogData );
   }
}

void SceneManager::renderScene( ScenePassType passType, U32 objectMask )
{
   SceneCameraState cameraState = SceneCameraState::fromGFX();
   
   // Handle frustum locking.

   const bool lockedFrustum = ( smLockDiffuseFrustum && passType == SPT_Diffuse );
   if( lockedFrustum )
      cameraState = smLockedDiffuseCamera;
   else if( passType == SPT_Diffuse )
   {
      // Store the camera state so if we lock, this will become the
      // locked state.

      if( passType == SPT_Diffuse )
         smLockedDiffuseCamera = cameraState;
   }
   
   // Create the render state.

   SceneRenderState renderState( this, passType, cameraState );

   // If we have locked the frustum, reset the view transform
   // on the render pass which the render state has just set
   // to the view matrix corresponding to the locked frustum.  For
   // rendering, however, we need the true view matrix from the
   // GFX state.

   if( lockedFrustum )
   {
      RenderPassManager* rpm = renderState.getRenderPass();
      rpm->assignSharedXform( RenderPassManager::View, GFX->getWorldMatrix() );
   }

   // Render.

   renderScene( &renderState, objectMask );
}

bool DecalRoad::prepRenderImage(	SceneState* state, 
                                 const U32 stateKey, 
                                 const U32 startZone,
                                 const bool modifyBaseZoneState)
{
   if (  mNodes.size() <= 1 || 
         isLastState(state, stateKey) || 
         mBatches.size() == 0 ||
         !mMatInst ||
         state->isShadowPass() )
      return false;

   // Set Last State.
   setLastState( state, stateKey );

   // Is Object Rendered?
   if ( !state->isObjectRendered( this ) )
      return false;

   RenderPassManager *renderPass = state->getRenderPass();

   // Debug RenderInstance
   // Only when editor is open.
   if ( smEditorOpen )
   {
      ObjectRenderInst *ri = renderPass->allocInst<ObjectRenderInst>();
      ri->type = RenderPassManager::RIT_Object;
      ri->renderDelegate.bind( this, &DecalRoad::_debugRender );
      state->getRenderPass()->addInst( ri );
   }

   // Normal Road RenderInstance
   // Always rendered when the editor is not open
   // otherwise obey the smShowRoad flag
   if ( !smShowRoad && smEditorOpen )
      return false;

   const Frustum &frustum = state->getFrustum();

   MeshRenderInst coreRI;
   coreRI.clear();
   coreRI.objectToWorld = &MatrixF::Identity;
   coreRI.worldToCamera = renderPass->allocSharedXform(RenderPassManager::View);
   
   MatrixF *tempMat = renderPass->allocUniqueXform( MatrixF( true ) );   
   MathUtils::getZBiasProjectionMatrix( gDecalBias, frustum, tempMat );
   coreRI.projection = tempMat;

   coreRI.type = RenderPassManager::RIT_Decal;
   coreRI.matInst = mMatInst;
   coreRI.vertBuff = &mVB;
   coreRI.primBuff = &mPB;
	
   // Make it the sort distance the max distance so that 
   // it renders after all the other opaque geometry in 
   // the prepass bin.
   coreRI.sortDistSq = F32_MAX;

	// Get the light manager and setup lights
   LightManager *lm = state->getLightManager();
   if ( lm )
   {
      lm->setupLights( this, getWorldSphere() );
		lm->getBestLights( coreRI.lights, 8 );
   }

   U32 startBatchIdx = -1;
   U32 endBatchIdx = 0;

   for ( U32 i = 0; i < mBatches.size(); i++ )   
   {
      // TODO: visibility is bugged... must fix!
      //const RoadBatch &batch = mBatches[i];
      //const bool isVisible = frustum.intersects( batch.bounds );         
      if ( true /*isVisible*/ )
      {
         // If this is the start of a set of batches.
         if ( startBatchIdx == -1 )
            endBatchIdx = startBatchIdx = i;

         // Else we're extending the end batch index.
         else
            ++endBatchIdx; 

         // If this isn't the last batch then continue.
         if ( i < mBatches.size()-1 )
            continue;
      }

      // We we still don't have a start batch, so skip.
      if ( startBatchIdx == -1 )
         continue;

      // Render this set of batches.
      const RoadBatch &startBatch = mBatches[startBatchIdx]; // mBatches[0]; 
      const RoadBatch &endBatch = mBatches[endBatchIdx]; // mBatches.last(); 

      U32 startVert = startBatch.startVert;
      U32 startIdx = startBatch.startIndex;
      U32 vertCount = endBatch.endVert - startVert;
//.........这里部分代码省略.........

void TSStatic::prepRenderImage( SceneRenderState* state )
{
   if( !mShapeInstance )
      return;

   Point3F cameraOffset;
   getRenderTransform().getColumn(3,&cameraOffset);
   cameraOffset -= state->getDiffuseCameraPosition();
   F32 dist = cameraOffset.len();
   if (dist < 0.01f)
      dist = 0.01f;

   if (mUseAlphaFade)
   {
      mAlphaFade = 1.0f;
      if ((mAlphaFadeStart < mAlphaFadeEnd) && mAlphaFadeStart > 0.1f)
      {
         if (mInvertAlphaFade)
         {
            if (dist <= mAlphaFadeStart)
            {
               return;
            }
            if (dist < mAlphaFadeEnd)
            {
               mAlphaFade = ((dist - mAlphaFadeStart) / (mAlphaFadeEnd - mAlphaFadeStart));
            }
         }
         else
         {
            if (dist >= mAlphaFadeEnd)
            {
               return;
            }
            if (dist > mAlphaFadeStart)
            {
               mAlphaFade -= ((dist - mAlphaFadeStart) / (mAlphaFadeEnd - mAlphaFadeStart));
            }
         }
      }
   }

   F32 invScale = (1.0f/getMax(getMax(mObjScale.x,mObjScale.y),mObjScale.z));   

   // If we're currently rendering our own reflection we
   // don't want to render ourselves into it.
   if ( mCubeReflector.isRendering() )
      return;


   if ( mForceDetail == -1 )
      mShapeInstance->setDetailFromDistance( state, dist * invScale );
   else
      mShapeInstance->setCurrentDetail( mForceDetail );

   if ( mShapeInstance->getCurrentDetail() < 0 )
      return;

   GFXTransformSaver saver;
   
   // Set up our TS render state.
   TSRenderState rdata;
   rdata.setSceneState( state );
   rdata.setFadeOverride( 1.0f );
   rdata.setOriginSort( mUseOriginSort );

   if ( mCubeReflector.isEnabled() )
      rdata.setCubemap( mCubeReflector.getCubemap() );

   // Acculumation
   rdata.setAccuTex(mAccuTex);

   // If we have submesh culling enabled then prepare
   // the object space frustum to pass to the shape.
   Frustum culler;
   if ( mMeshCulling )
   {
      culler = state->getCullingFrustum();
      MatrixF xfm( true );
      xfm.scale( Point3F::One / getScale() );
      xfm.mul( getRenderWorldTransform() );
      xfm.mul( culler.getTransform() );
      culler.setTransform( xfm );
      rdata.setCuller( &culler );
   }

   // We might have some forward lit materials
   // so pass down a query to gather lights.
   LightQuery query;
   query.init( getWorldSphere() );
   rdata.setLightQuery( &query );

   MatrixF mat = getRenderTransform();
   mat.scale( mObjScale );
   GFX->setWorldMatrix( mat );

   if ( state->isDiffusePass() && mCubeReflector.isEnabled() && mCubeReflector.getOcclusionQuery() )
   {
       RenderPassManager *pass = state->getRenderPass();
       OccluderRenderInst *ri = pass->allocInst<OccluderRenderInst>();  
//.........这里部分代码省略.........

//.........这里部分代码省略.........
      {
         alpha = mClampF( alpha, 0.0f, 1.0f );
         alpha *= dinst->mVisibility;
      }
      else
         alpha = mClampF( alpha * dinst->mVisibility, 0.0f, 1.0f );

      //
      for ( U32 v = 0; v < dinst->mVertCount; v++ )
         dinst->mVerts[v].color.set( 255, 255, 255, alpha * 255.0f );
   }

   PROFILE_END();   

   if ( mDecalQueue.empty() )
      return false;

   // Sort queued decals...
   // 1. Editor decals - in render priority order first, creation time second, and material third.
   // 2. Dynamic decals - in render priority order first and creation time second.
   //
   // With the constraint that decals with different render priority cannot
   // be rendered together in the same draw call.

   PROFILE_START( DecalManager_RenderDecals_Sort );
   dQsort( mDecalQueue.address(), mDecalQueue.size(), sizeof(DecalInstance*), cmpDecalRenderOrder );
   PROFILE_END();

   PROFILE_SCOPE( DecalManager_RenderDecals_RenderBatch );

   mPrimBuffs.clear();
   mVBs.clear();

   RenderPassManager *renderPass = state->getRenderPass();

   // Base render instance for convenience we use for convenience.
   // Data shared by all instances we allocate below can be copied
   // from the base instance at the same time.
   MeshRenderInst baseRenderInst;
   baseRenderInst.clear();   

   MatrixF *tempMat = renderPass->allocUniqueXform( MatrixF( true ) );
   MathUtils::getZBiasProjectionMatrix( gDecalBias, mCuller, tempMat );
   baseRenderInst.projection = tempMat;

   baseRenderInst.objectToWorld = &MatrixF::Identity;
   baseRenderInst.worldToCamera = renderPass->allocSharedXform(RenderPassManager::View);

   baseRenderInst.type = RenderPassManager::RIT_Decal;      

   // Make it the sort distance the max distance so that 
   // it renders after all the other opaque geometry in 
   // the prepass bin.
   baseRenderInst.sortDistSq = F32_MAX;

   // Get the best lights for the current camera position.
   LightManager *lm = state->getLightManager();
   if ( lm )
   {
      lm->setupLights(  NULL, 
                        mCuller.getPosition(),
                        mCuller.getTransform().getForwardVector(),
                        mCuller.getFarDist() );
      lm->getBestLights( baseRenderInst.lights, 4 );
      lm->resetLights();
   }

void RenderTranslucentMgr::render( SceneRenderState *state )
{
    PROFILE_SCOPE(RenderTranslucentMgr_render);

    // Early out if nothing to draw.
    if(!mElementList.size())
        return;

    GFXDEBUGEVENT_SCOPE(RenderTranslucentMgr_Render, ColorI::BLUE);

    // Find the particle render manager (if we don't have it)
    if(mParticleRenderMgr == NULL)
    {
        RenderPassManager *rpm = state->getRenderPass();
        for( U32 i = 0; i < rpm->getManagerCount(); i++ )
        {
            RenderBinManager *bin = rpm->getManager(i);
            if( bin->getRenderInstType() == RenderParticleMgr::RIT_Particles )
            {
                mParticleRenderMgr = reinterpret_cast<RenderParticleMgr *>(bin);
                break;
            }
        }
    }

    GFXTransformSaver saver;

    SceneData sgData;
    sgData.init( state );

    GFXVertexBuffer * lastVB = NULL;
    GFXPrimitiveBuffer * lastPB = NULL;

    // Restore transforms
    MatrixSet &matrixSet = getRenderPass()->getMatrixSet();
    matrixSet.restoreSceneViewProjection();

    U32 binSize = mElementList.size();
    for( U32 j=0; j<binSize; )
    {
        RenderInst *baseRI = mElementList[j].inst;

        U32 matListEnd = j;

        // render these separately...
        if ( baseRI->type == RenderPassManager::RIT_ObjectTranslucent )
        {
            ObjectRenderInst* objRI = static_cast<ObjectRenderInst*>(baseRI);
            objRI->renderDelegate( objRI, state, NULL );

            lastVB = NULL;
            lastPB = NULL;
            j++;
            continue;
        }
        //Volumetric Fog Add
        else if (baseRI->type == RenderPassManager::RIT_VolumetricFog)
        {
            ObjectRenderInst* objRI = static_cast<ObjectRenderInst*>(baseRI);
            objRI->renderDelegate(objRI,state,NULL);

            lastVB = NULL;
            lastPB = NULL;
            j++;
            continue;
        }
        //Volumetric Fog Add
        else if ( baseRI->type == RenderPassManager::RIT_Particle )
        {
            ParticleRenderInst *ri = static_cast<ParticleRenderInst*>(baseRI);

            // Tell Particle RM to draw the system. (This allows the particle render manager
            // to manage drawing offscreen particle systems, and allows the systems
            // to be composited back into the scene with proper translucent
            // sorting order)
            mParticleRenderMgr->renderInstance(ri, state);

            lastVB = NULL;    // no longer valid, null it
            lastPB = NULL;    // no longer valid, null it

            j++;
            continue;
        }
        else if ( baseRI->type == RenderPassManager::RIT_Translucent )
        {
            MeshRenderInst* ri = static_cast<MeshRenderInst*>(baseRI);
            BaseMatInstance *mat = ri->matInst;

            setupSGData( ri, sgData );

            while( mat->setupPass( state, sgData ) )
            {
                U32 a;
                for( a=j; a<binSize; a++ )
                {
                    RenderInst* nextRI = mElementList[a].inst;
                    if ( nextRI->type != RenderPassManager::RIT_Translucent )
                        break;

                    MeshRenderInst *passRI = static_cast<MeshRenderInst*>(nextRI);
//.........这里部分代码省略.........

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

   // No elements then nothing to render.
   if ( mElementCount == 0 )
      return;

   // We need these all over the place later.
   const Point3F &camPos = state->getCameraPosition();
   const RectI &viewport = GFX->getViewport();
   const Point3F &lightPos = flareState->lightMat.getPosition();
   LightInfo *lightInfo = flareState->lightInfo;

   bool isVectorLight = lightInfo->getType() == LightInfo::Vector;

   // Perform visibility testing on the light...
   // Project the light position from world to screen space, we need this
   // position later, and it tells us if it is actually onscreen.   
   
   Point3F lightPosSS;
   bool onscreen = MathUtils::mProjectWorldToScreen( lightPos, &lightPosSS, viewport, GFX->getWorldMatrix(), gClientSceneGraph->getNonClipProjection() );  

   U32 visDelta = U32_MAX;
   U32 fadeOutTime = 20;
   U32 fadeInTime = 125;    

   // Fade factor based on amount of occlusion.
   F32 occlusionFade = 1.0f;

   bool lightVisible = true;
   
   if ( !state->isReflectPass() )
   {
      // It is onscreen, so raycast as a simple occlusion test.

      U32 losMask =	STATIC_COLLISION_MASK |
                     ShapeBaseObjectType |
                     StaticTSObjectType |
                     ItemObjectType |
                     PlayerObjectType;

      GameConnection *conn = GameConnection::getConnectionToServer();
      if ( !conn )
         return;

      bool needsRaycast = true;

      // NOTE: if hardware does not support HOQ it will return NULL
      // and we will retry every time but there is not currently a good place
      // for one-shot initialization of LightFlareState
      if ( flareState->occlusionQuery == NULL )
         flareState->occlusionQuery = GFX->createOcclusionQuery();
      if ( flareState->fullPixelQuery == NULL )
         flareState->fullPixelQuery = GFX->createOcclusionQuery();

      if ( flareState->occlusionQuery && 
           ( ( isVectorLight && flareState->worldRadius > 0.0f ) || 
             ( !isVectorLight && mOcclusionRadius > 0.0f ) ) )
      {
         // Always treat light as onscreen if using HOQ
         // it will be faded out if offscreen anyway.
         onscreen = true;

         U32 pixels = -1;
         GFXOcclusionQuery::OcclusionQueryStatus status = flareState->occlusionQuery->getStatus( true, &pixels );

         String str = flareState->occlusionQuery->statusToString( status );
         Con::setVariable( "$Flare::OcclusionStatus", str.c_str() );
         Con::setIntVariable( "$Flare::OcclusionVal", pixels );
         
         if ( status == GFXOcclusionQuery::Occluded )
            occlusionFade = 0.0f;

         if ( status != GFXOcclusionQuery::Unset )         
            needsRaycast = false;

         RenderPassManager *pass = state->getRenderPass();

         OccluderRenderInst *ri = pass->allocInst<OccluderRenderInst>();   

         Point3F scale( Point3F::One );

         if ( isVectorLight && flareState->worldRadius > 0.0f )         
            scale *= flareState->worldRadius;
         else
            scale *= mOcclusionRadius;
         
         ri->type = RenderPassManager::RIT_Occluder;
         ri->query = flareState->occlusionQuery;   
         ri->query2 = flareState->fullPixelQuery;
         ri->position = lightPos;
         ri->scale = scale;
         ri->orientation = pass->allocUniqueXform( lightInfo->getTransform() );         
         ri->isSphere = true;
         state->getRenderPass()->addInst( ri );

         if ( status == GFXOcclusionQuery::NotOccluded )
         {
            U32 fullPixels;
//.........这里部分代码省略.........

void ScatterSky::prepRenderImage( SceneRenderState *state )
{
   // Only render into diffuse and reflect passes.

   if( !state->isDiffusePass() &&
       !state->isReflectPass() )
      return;

   // Regular sky render instance.
   RenderPassManager* renderPass = state->getRenderPass();
   ObjectRenderInst *ri = renderPass->allocInst<ObjectRenderInst>();
   ri->renderDelegate.bind( this, &ScatterSky::_render );
   ri->type = RenderPassManager::RIT_Sky;
   ri->defaultKey = 10;
   ri->defaultKey2 = 0;
   renderPass->addInst(ri);

   // Debug render instance.
   /*
   if ( Con::getBoolVariable( "$ScatterSky::debug", false ) )
   {
      ri = state->getRenderPass()->allocInst<ObjectRenderInst>();
      ri->renderDelegate.bind( this, &ScatterSky::_debugRender );
      ri->type = RenderPassManager::RIT_Editor;
      state->getRenderPass()->addInst( ri );
   }
   */

   // Light flare effect render instance.
   if ( mFlareData && mNightInterpolant != 1.0f )
   {
      mFlareState.fullBrightness = mBrightness;
      mFlareState.scale = mFlareScale;
      mFlareState.lightInfo = mLight;

      Point3F lightPos = state->getCameraPosition() - state->getFarPlane() * mLight->getDirection() * 0.9f;
      mFlareState.lightMat.identity();
      mFlareState.lightMat.setPosition( lightPos );

      F32 dist = ( lightPos - state->getCameraPosition( ) ).len( );
      F32 coronaScale = 0.5f;
      F32 screenRadius = GFX->getViewport( ).extent.y * coronaScale * 0.5f;
      mFlareState.worldRadius = screenRadius * dist / state->getWorldToScreenScale( ).y;

      mFlareData->prepRender( state, &mFlareState );
   }

   // Render instances for Night effects.
   if ( mNightInterpolant <= 0.0f )
      return;

   // Render instance for Moon sprite.
   if ( mMoonEnabled && mMoonMatInst )
   {
      mMatrixSet->setSceneView(GFX->getWorldMatrix());
      mMatrixSet->setSceneProjection(GFX->getProjectionMatrix());
      mMatrixSet->setWorld(GFX->getWorldMatrix());

      ObjectRenderInst *ri = renderPass->allocInst<ObjectRenderInst>();
      ri->renderDelegate.bind( this, &ScatterSky::_renderMoon );
      ri->type = RenderPassManager::RIT_Sky;
      // Render after sky objects and before CloudLayer!
      ri->defaultKey = 5;
      ri->defaultKey2 = 0;
      renderPass->addInst(ri);
   }
}

void ProjectedShadow::_renderToTexture( F32 camDist, const TSRenderState &rdata )
{
    PROFILE_SCOPE( ProjectedShadow_RenderToTexture );

    GFXDEBUGEVENT_SCOPE( ProjectedShadow_RenderToTexture, ColorI( 255, 0, 0 ) );

    RenderPassManager *renderPass = _getRenderPass();
    if ( !renderPass )
        return;

    GFXTransformSaver saver;

    // NOTE: GFXTransformSaver does not save/restore the frustum
    // so we must save it here before we modify it.
    F32 l, r, b, t, n, f;
    bool ortho;
    GFX->getFrustum( &l, &r, &b, &t, &n, &f, &ortho );

    // Set the orthographic projection
    // matrix up, to be based on the radius
    // generated based on our shape.
    GFX->setOrtho( -mRadius, mRadius, -mRadius, mRadius, 0.001f, (mRadius * 2) * smDepthAdjust, true );

    // Set the world to light space
    // matrix set up in shouldRender().
    GFX->setWorldMatrix( mWorldToLight );

    // Get the shapebase datablock if we have one.
    ShapeBaseData *data = NULL;
    if ( mShapeBase )
        data = static_cast<ShapeBaseData*>( mShapeBase->getDataBlock() );

    // Init or update the shadow texture size.
    if ( mShadowTexture.isNull() || ( data && data->shadowSize != mShadowTexture.getWidth() ) )
    {
        U32 texSize = getNextPow2( data ? data->shadowSize : 256 * LightShadowMap::smShadowTexScalar );
        mShadowTexture.set( texSize, texSize, GFXFormatR8G8B8A8, &PostFxTargetProfile, "BLShadow" );
    }

    GFX->pushActiveRenderTarget();

    if ( !mRenderTarget )
        mRenderTarget = GFX->allocRenderToTextureTarget();

    mRenderTarget->attachTexture( GFXTextureTarget::DepthStencil, _getDepthTarget( mShadowTexture->getWidth(), mShadowTexture->getHeight() ) );
    mRenderTarget->attachTexture( GFXTextureTarget::Color0, mShadowTexture );
    GFX->setActiveRenderTarget( mRenderTarget );

    GFX->clear( GFXClearZBuffer | GFXClearStencil | GFXClearTarget, ColorI( 0, 0, 0, 0 ), 1.0f, 0 );

    const SceneRenderState *diffuseState = rdata.getSceneState();
    SceneManager *sceneManager = diffuseState->getSceneManager();

    SceneRenderState baseState
    (
        sceneManager,
        SPT_Shadow,
        SceneCameraState::fromGFXWithViewport( diffuseState->getViewport() ),
        renderPass
    );

    baseState.getMaterialDelegate().bind( &ProjectedShadow::_getShadowMaterial );
    baseState.setDiffuseCameraTransform( diffuseState->getCameraTransform() );
    baseState.setWorldToScreenScale( diffuseState->getWorldToScreenScale() );
    baseState.getCullingState().disableZoneCulling( true );

    mParentObject->prepRenderImage( &baseState );
    renderPass->renderPass( &baseState );

    // Delete the SceneRenderState we allocated.
    mRenderTarget->resolve();
    GFX->popActiveRenderTarget();

    // If we're close enough then filter the shadow.
    if ( camDist < BasicLightManager::getShadowFilterDistance() )
    {
        if ( !smShadowFilter )
        {
            PostEffect *filter = NULL;

            if ( !Sim::findObject( "BL_ShadowFilterPostFx", filter ) )
                Con::errorf( "ProjectedShadow::_renderToTexture() - 'BL_ShadowFilterPostFx' not found!" );

            smShadowFilter = filter;
        }

        if ( smShadowFilter )
            smShadowFilter->process( NULL, mShadowTexture );
    }

    // Restore frustum
    if (!ortho)
        GFX->setFrustum(l, r, b, t, n, f);
    else
        GFX->setOrtho(l, r, b, t, n, f);

    // Set the last render time.
    mLastRenderTime = Platform::getVirtualMilliseconds();

    // HACK: Will remove in future release!
//.........这里部分代码省略.........

bool LightFlareData::_testVisibility(const SceneRenderState *state, LightFlareState *flareState, U32 *outVisDelta, F32 *outOcclusionFade, Point3F *outLightPosSS)
{
   // Reflections use the results from the last forward
   // render so we don't need multiple queries.
   if ( state->isReflectPass() )
   {
      *outOcclusionFade = flareState->occlusion;
      *outVisDelta = Sim::getCurrentTime() - flareState->visChangedTime;
      return flareState->visible;
   }

   // Initialize it to something first.
   *outOcclusionFade = 0;

   // First check to see if the flare point 
   // is on scren at all... if not then return
   // the last result.
   const Point3F &lightPos = flareState->lightMat.getPosition();  
   const RectI &viewport = GFX->getViewport();
   MatrixF projMatrix;
   state->getCameraFrustum().getProjectionMatrix(&projMatrix);
   if( state->isReflectPass() )
      projMatrix = state->getSceneManager()->getNonClipProjection();
   bool onScreen = MathUtils::mProjectWorldToScreen( lightPos, outLightPosSS, viewport, GFX->getWorldMatrix(), projMatrix );

   // It is onscreen, so raycast as a simple occlusion test.
   const LightInfo *lightInfo = flareState->lightInfo;
   const bool isVectorLight = lightInfo->getType() == LightInfo::Vector;

   const bool useOcclusionQuery = isVectorLight ? flareState->worldRadius > 0.0f : mOcclusionRadius > 0.0f;
   bool needsRaycast = true;

   // NOTE: if hardware does not support HOQ it will return NULL
   // and we will retry every time but there is not currently a good place
   // for one-shot initialization of LightFlareState
   if ( useOcclusionQuery )
   {
      // Always treat light as onscreen if using HOQ
      // it will be faded out if offscreen anyway.
      onScreen = true;
	  needsRaycast = false;

      // Test the hardware queries for rendered pixels.
      U32 pixels = 0, fullPixels = 0;
      GFXOcclusionQuery::OcclusionQueryStatus status;
      flareState->occlusionQuery.getLastStatus( false, &status, &pixels );      
      flareState->fullPixelQuery.getLastStatus( false, NULL, &fullPixels );
      
      if ( status == GFXOcclusionQuery::NotOccluded && fullPixels != 0 )
         *outOcclusionFade = mClampF( (F32)pixels / (F32)fullPixels, 0.0f, 1.0f );

        if( !flareState->occlusionQuery.isWaiting() )
        {
            // Setup the new queries.
            RenderPassManager *rpm = state->getRenderPass();
            OccluderRenderInst *ri = rpm->allocInst<OccluderRenderInst>();   
            ri->type = RenderPassManager::RIT_Occluder;
            ri->query = flareState->occlusionQuery.getQuery();
            ri->query2 = flareState->fullPixelQuery.getQuery();
            ri->isSphere = true;
            ri->position = lightPos;
            if ( isVectorLight && flareState->worldRadius > 0.0f )         
                ri->scale.set( flareState->worldRadius );
            else
                ri->scale.set( mOcclusionRadius );
            ri->orientation = rpm->allocUniqueXform( lightInfo->getTransform() );         
      
            // Submit the queries.
            state->getRenderPass()->addInst( ri );
        }
   }

   const Point3F &camPos = state->getCameraPosition();

   if ( needsRaycast )
   {
      // Use a raycast to determine occlusion.
      GameConnection *conn = GameConnection::getConnectionToServer();
      if ( !conn )
         return false;

      const bool fps = conn->isFirstPerson();
      GameBase *control = conn->getControlObject();
      if ( control && fps )
         control->disableCollision();

      RayInfo rayInfo;

      if ( !gClientContainer.castRay( camPos, lightPos, LosMask, &rayInfo ) )
         *outOcclusionFade = 1.0f;

      if ( control && fps )
         control->enableCollision();
   }

   // The raycast and hardware occlusion query only calculate if
   // the flare is on screen... if does not account for being 
   // partially offscreen.
   //
   // The code here clips a box against the viewport to 
//.........这里部分代码省略.........

void GuiObjectView::renderWorld( const RectI& updateRect )
{
   if( !mModel )
      return;
      
   GFXTransformSaver _saveTransforms;

   // Determine the camera position, and store off render state.
   
   MatrixF modelview;
   MatrixF mv;
   Point3F cp;

   modelview = GFX->getWorldMatrix();

   mv = modelview;
   mv.inverse();
   mv.getColumn( 3, &cp );

   RenderPassManager* renderPass = gClientSceneGraph->getDefaultRenderPass();

   S32 time = Platform::getVirtualMilliseconds();
   S32 dt = time - mLastRenderTime;
   mLastRenderTime = time;

   LIGHTMGR->unregisterAllLights();
   LIGHTMGR->setSpecialLight( LightManager::slSunLightType, mLight );
  
   GFX->setStateBlock( mDefaultGuiSB );

   F32 left, right, top, bottom, nearPlane, farPlane;
   bool isOrtho;
   GFX->getFrustum( &left, &right, &bottom, &top, &nearPlane, &farPlane, &isOrtho );

   Frustum frust( false, left, right, top, bottom, nearPlane, farPlane, MatrixF::Identity );

   SceneRenderState state
   (
      gClientSceneGraph,
      SPT_Diffuse,
      SceneCameraState( GFX->getViewport(), frust, GFX->getWorldMatrix(), GFX->getProjectionMatrix() ),
      renderPass,
      false
   );

   // Set up our TS render state here.   
   TSRenderState rdata;
   rdata.setSceneState( &state );

   // We might have some forward lit materials
   // so pass down a query to gather lights.
   LightQuery query;
   query.init( SphereF( Point3F::Zero, 1.0f ) );
   rdata.setLightQuery( &query );

   // Render primary model.

   if( mModel )
   {
      if( mRunThread )
      {
         mModel->advanceTime( dt / 1000.f, mRunThread );
         mModel->animate();
      }
      
      mModel->render( rdata );
   }
   
   // Render mounted model.

   if( mMountedModel && mMountNode != -1 )
   {
      GFX->pushWorldMatrix();
      GFX->multWorld( mModel->mNodeTransforms[ mMountNode ] );
      GFX->multWorld( mMountTransform );
      
      mMountedModel->render( rdata );

      GFX->popWorldMatrix();
   }

   renderPass->renderPass( &state );

   // Make sure to remove our fake sun.
   LIGHTMGR->unregisterAllLights();
}