genesis-3d_engine/Engine/graphicsystem/Camera/RenderPipeline/RenderPipelineManager.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

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****************************************************************************/
#include "stdneb.h"
#include "graphicsystem/Vision/RenderScene.h"
#include "RenderPipelineManager.h"
#include "GraphicSystem.h"
#include "graphicsystem/Camera/RenderPipeline/DeferredLightingRenderPipeline.h"
#include "graphicsystem/Renderable/RenderObject.h"

namespace Graphic
{

	__ImplementClass(RenderPipelineManager,'RPMA',Core::RefCounted)

		RenderPipelineManager::RenderPipelineManager()
	{
		m_pipelineContext.m_renderPipelineManager = this;
		m_forwardPipeline = ForwardShadingRenderPipeline::Create();
	}

	RenderPipelineManager::~RenderPipelineManager()
	{
		//empty
	}

	void RenderPipelineManager::PreRender(Camera* camera)
	{
		m_pipelineContext.m_camera = camera;
		//if(camera->UseViewport())
		//{
		//	const Camera::ViewPort& vp = camera->GetViewport();
		//	GraphicSystem::Instance()->SetViewPort(vp);
		//}
	}

	void RenderPipelineManager::AfterRender()
	{
		//if (m_pipelineContext.m_camera->UseViewport() && m_pipelineContext.m_camera->GetCameraOrder() != eCO_Main)
		//{
		//	GPtr<Camera> mainCam = GraphicSystem::Instance()->GetCameraByType(eCO_Main);
		//	n_assert(mainCam.isvalid());
		//	GraphicSystem::Instance()->SetViewPort(mainCam->GetViewport());
		//}

		m_pipelineContext.m_camera = 0;
	}

	void RenderPipelineManager::Open()
	{

	}

	void RenderPipelineManager::Close()
	{
		m_pipelineContext.m_camera = 0;
		m_pipelineContext.m_renderPipelineManager = 0;
		m_forwardPipeline = 0;
		m_customPipeline = 0;
	}
	void RenderPipelineManager::SetupDeferred()
	{
		m_deferredPipeline = DeferredLightingRenderPipeline::Create();
	}

	void RenderPipelineManager::SetCustomPipeline(const GPtr<RenderPipeline>& customPipeline)
	{
		this->m_customPipeline = customPipeline;
	}

	void RenderPipelineManager::OnRenderPipeline(Camera* camera)
	{
		GPtr<RenderPipelineManager>& renderpipemanager = camera->GetRenderPipelineManager();
		renderpipemanager->PreRender(camera);

		renderpipemanager->m_pipelineContext.m_renderDatas.SetUseFor(RenderDataCollection::Normal);
		AssignVisibleNodes(renderpipemanager->m_pipelineContext);

		if(camera->GetUseCallBack())
		{
			RenderCallBacks::Iterator begin = renderpipemanager->m_pipelineContext.m_callBacks.Begin();
			RenderCallBacks::Iterator end = renderpipemanager->m_pipelineContext.m_callBacks.End();
			while(begin != end)
			{
				(*begin)->OnWillRenderObject(camera);
				++begin;
			}	
		}

		RenderScene* camera_scene = camera->GetRenderScene();
		renderpipemanager->m_pipelineContext.m_renderConfig.bFog = camera_scene->GetEnvironment()->fogColor.w() > 0.0f;

		AssignEffectiveLight(renderpipemanager->m_pipelineContext);
		AssignRenderDatas(renderpipemanager->m_pipelineContext);
		renderPipeline(renderpipemanager);

		renderpipemanager->AfterRender();
	}

	void RenderPipelineManager::renderPipeline(GPtr<RenderPipelineManager>& renderpipemanager)
	{
		Camera::RenderMode rm = renderpipemanager->m_pipelineContext.m_camera->GetRenderMode();

		switch (rm)
		{
		case Camera::ForwardMode:
			{
				renderpipemanager->m_forwardPipeline->Render(renderpipemanager->m_pipelineContext);
			}
			break;
		case Camera::DeferredMode:
			{
				renderpipemanager->m_deferredPipeline->Render(renderpipemanager->m_pipelineContext);
			}
			break;
		case Camera::CustomedMode:
			{
				// custom pipeline rendering
				n_assert(renderpipemanager->m_customPipeline.isvalid());
				renderpipemanager->m_customPipeline->Render(renderpipemanager->m_pipelineContext);
			}
			break;
		default:
			{
				n_error("error Camera::RenderMode !");
			}
			break;
		}
	}


	void RenderPipelineManager::AssignVisibleNodes(PipelineParamters& params)
	{
		Camera* camera = params.m_camera;
		params.m_callBacks.Clear();
		params.m_visibleNodes.Clear();

		GPtr<Vis::VisQuery> pVisQuery = camera->Cull();
		n_assert( pVisQuery.isvalid() );

		bool mainCamera = eCO_Main == camera->GetCameraOrder();
		const Util::Array<GPtr<Vis::VisEntity> >& viEnityList = pVisQuery->GetQueryResult();

		Math::float4 camPos = camera->GetTransform().get_position();
		Math::float4 camDir = -camera->GetTransform().get_zaxis();

		for (IndexT i = 0; i < viEnityList.Size(); ++i)
		{
			const GPtr<Vis::VisEntity>& visEnt = viEnityList[i];
			n_assert( visEnt.isvalid() );
			Graphic::GraphicObject* obj = visEnt->GetUserData();
			n_assert( obj && obj->GetRtti()->IsDerivedFrom( RenderObject::RTTI ) );

			RenderObject* renderObj = static_cast<RenderObject*>(obj);

			uint mark = renderObj->GetRenderCullMark() & (uint)camera->GetCullMask();

			if (mark)
			{

#if __GENESIS_EDITOR__
				if (renderObj->IsEditorVisible() || camera->GetCameraTarget() == Camera::GAME)
				{
					if (mainCamera && renderObj->GetNeedCullCallBack())
					{
						params.m_callBacks.Append(renderObj);
					}
					Math::float4 renderablePos = renderObj->GetTransform().get_position();
					Math::float4 camToObj = renderablePos - camPos;
					VisibleNode& node = params.m_visibleNodes.PushBack();
					node.object = renderObj;
					node.distance = Math::float4::dot3(camDir,camToObj);
				}
#else
				if (mainCamera && renderObj->GetNeedCullCallBack())
				{
					params.m_callBacks.Append(renderObj);
				}
				Math::float4 renderablePos = renderObj->GetTransform().get_position();
				Math::float4 camToObj = renderablePos - camPos;
				VisibleNode& node = params.m_visibleNodes.PushBack();
				node.object = renderObj;
				node.distance = Math::float4::dot3(camDir,camToObj);
#endif
				
			}

		}
		if (mainCamera)
		{
			const Util::Array<RenderObject*>& notCullList = camera->GetRenderScene()->GetNotCullRenderObjects();
			Util::Array<RenderObject*>::Iterator it = notCullList.Begin();
			Util::Array<RenderObject*>::Iterator end = notCullList.End();
			while(it != end)
			{
				uint mark = (*it)->GetRenderCullMark() & (uint)camera->GetCullMask();
				if (mark)
				{
#if __GENESIS_EDITOR__
					if ( (*it)->IsEditorVisible() || camera->GetCameraTarget() == Camera::GAME)
					{
						VisibleNode& node = params.m_visibleNodes.PushBack();
						node.object = *it;
						node.distance = 0;
					}
#else
					VisibleNode& node = params.m_visibleNodes.PushBack();
					node.object = *it;
					node.distance = 0;
#endif
					
				}
				++it;
			}
		}
		const Util::Array<RenderObject*>& notCullList = camera->GetNotCullRenderObjects();
		Util::Array<RenderObject*>::Iterator it = notCullList.Begin();
		Util::Array<RenderObject*>::Iterator end = notCullList.End();
		while(it != end)
		{
			uint mark = (*it)->GetRenderCullMark() & (uint)camera->GetCullMask();
			if (mark)
			{
				VisibleNode& node = params.m_visibleNodes.PushBack();
				node.object = *it;
				node.distance = 0;
			}
			++it;
		}



	}

	void RenderPipelineManager::AssignRenderDatas(PipelineParamters& params)
	{
		RenderDataManager* renderDatas = &params.m_renderDatas;
		const RenderConfig* renderConfig = &params.m_renderConfig;
		renderDatas->Reset(eCO_Main == params.m_camera->GetCameraOrder() );
		VisibleNodeCollection::Iterator it = params.m_visibleNodes.Begin();
		VisibleNodeCollection::Iterator end = params.m_visibleNodes.End();
		while(it != end)
		{
			renderDatas->SetCurrentNode(it);
			it->object->AddToCollection(renderDatas, renderConfig);
			++it;
		}
		renderDatas->Sort();
	}

	void RenderPipelineManager::AssignEffectiveLight(PipelineParamters& params)
	{
		params.m_activeLights.CameraCull(params.m_camera);
		params.m_renderConfig.bLight = (params.m_activeLights.GetActiveLightCount() > 0);

		if (params.m_camera->HasLightLitMap() && params.m_camera->HasDepthMap())
		{
			const ActiveLightInfo* sun_light = params.m_activeLights.FindSunLight();
			params.m_renderConfig.bShadowMap = sun_light && sun_light->light->IsEnableShadow();
			if (params.m_renderConfig.bShadowMap)
			{
				renderShadowMap(sun_light);
				return;
			}
		}
		else
		{
			params.m_renderConfig.bShadowMap = false;
		}
		GlobalMaterialParam* pGMP = Material::GetGlobalMaterialParams();
		pGMP->SetVectorParam(eGShaderVecShadowMapSize, Math::float4(0.0f, 0.0f, 0.0f, 0.0f));
	}
	void RenderPipelineManager::renderShadowMap(const ActiveLightInfo* aLight)
	{
		RenderLayer cullmark = GraphicSystem::Instance()->GetRenderingCamera()->GetCullMask();
		aLight->light->RenderShadowMapBegin();
		const Light::ShadowMapCameraList& list = aLight->light->GetShadowMapCameraList();
		for (int i = 0; i < list.Size(); ++i)
		{
			GPtr<Camera> camera = list[i];
			GraphicSystem::Instance()->_PushRenderCamera(camera.get());
			camera->SetCullMask(cullmark);
			GPtr<RenderPipelineManager>& mgr = camera->GetRenderPipelineManager();
			mgr->m_pipelineContext.m_camera = camera.get();
			mgr->m_pipelineContext.m_renderDatas.SetUseFor(RenderDataCollection::Shadow);
			mgr->m_pipelineContext.m_renderConfig.bFog = false;
			AssignVisibleNodes(mgr->m_pipelineContext);
			AssignRenderDatas(mgr->m_pipelineContext);
			renderPipeline(mgr);
			GlobalMaterialParam* pGMP = Material::GetGlobalMaterialParams();
			n_assert(NULL != pGMP);
			const Math::float4& shadowMapParam = pGMP->GetVectorParam(Graphic::eGShaderVecShadowMapSize);
			Math::float4 srcRect(0,0,shadowMapParam.x(),shadowMapParam.y());
			Math::float4 desRect = srcRect;
			desRect.x() = shadowMapParam.x() * i;
			desRect.z() = desRect.x() + shadowMapParam.x();
			GraphicSystem::Instance()->CopyRenderTarget(camera->GetRenderToTexture()->GetTargetHandle(),srcRect,camera->GetSwapTexture()->GetTargetHandle(),desRect);
			mgr->m_pipelineContext.m_camera = NULL;
			GraphicSystem::Instance()->_PopRenderCamera();
		}
	}
}