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

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****************************************************************************/

#include "stdneb.h"
#include "terrainfeature/components/TerrainRenderObject.h"
#include "terrainfeature/components/TerrainRenderComponent.h"
#include "terrainfeature/components/TerrainNode.h"
#include "graphicsystem/Camera/RenderPipeline/RenderData.h"
#include "graphicsystem/GraphicSystem.h"


namespace App
{
	using namespace Graphic;
	using namespace RenderBase;
	static bool g_bUseBaseMap(1);
	const IndexT sBrushIdxBase = 2;
	const IndexT sColorMapMaterialIdx = 1;
	__ImplementClass(TerrainRenderObject,'TROB',AppRenderObject)
		TerrainRenderObject::TerrainRenderObject()
		: m_TerrainNode(NULL)
	{

	}

	TerrainRenderObject::~TerrainRenderObject()
	{

	}

	void TerrainRenderObject::Set(Owner* comObject, TerrainNode* node,  const Math::matrix44& world)
	{
		n_assert(comObject&&node);
		mOwner = comObject;
		m_TerrainNode = node;
		SetTransform(world);
		SetBoundingBox( node->GetLocalBoundingBox() );
		SetLayerID(mOwner->GetActor()->GetLayerID());
	}

	void TerrainRenderObject::AddToCollection(Graphic::RenderDataCollection* collection, const Graphic::RenderConfig* renderConfig)
	{
		const Graphic::RenderableResUnitArray& res = GetOwner<Owner>()->GetRenderResource();
		int count = res.Size();

		if (Graphic::RenderDataCollection::Normal != collection->GetUseFor())
		{
			Graphic::Renderable* pRenderable = res[0].GetRenderable();
			Super::setShaderMask(pRenderable, renderConfig);
			collection->Push(pRenderable);
		}
		else if (g_bUseBaseMap && m_TerrainNode->IsUseBaseMap())
		{
			Graphic::Renderable* pRenderable = res[0].GetRenderable();
			Super::setShaderMask(pRenderable, renderConfig);
			collection->Push(pRenderable);
			//colormap Material
			if ( sColorMapMaterialIdx <= count )
			{
				pRenderable = res[sColorMapMaterialIdx].GetRenderable();
				Super::setShaderMask(pRenderable, renderConfig);
				collection->Push(pRenderable);
			}			

		}
		else
		{
			//other texture Material			
			for (int index = sBrushIdxBase; index< count; ++index)
			{
				Graphic::Renderable* pRenderable = res[index].GetRenderable();
				Super::setShaderMask(pRenderable, renderConfig);
				collection->Push(res[index].GetRenderable());
			}
			//colormap Material
			if ( sColorMapMaterialIdx <= count )
			{
				Graphic::Renderable* pRenderable = res[sColorMapMaterialIdx].GetRenderable();
				Super::setShaderMask(pRenderable, renderConfig);
				collection->Push(res[sColorMapMaterialIdx].GetRenderable());

				// make sure colormap is after other material
				IndexT lastIdx = count - 1;
				if ( lastIdx >= 0 )
				{
					MaterialInstance* pMatIns = res[lastIdx].GetRenderable()->GetMaterial();
					if ( pMatIns )
					{
						MaterialInstance* pMatInsColor = res[sColorMapMaterialIdx].GetRenderable()->GetMaterial();
						pMatInsColor->SetShaderInstanceID(0xEFFFFFFF - 1);
						pMatInsColor->SetSort(0xEFFFFFFF - 1);

					}

				}
			}
		}
	}
	void TerrainRenderObject::Render(const Graphic::Renderable* renderable, Graphic::RenderPassType passType, const Graphic::Material* customizedMaterial)
	{
		const Graphic::Material* material = (NULL == customizedMaterial) ? renderable->GetMaterial() : customizedMaterial;
		const RenderableType* rd = renderable->cast_fast<RenderableType>();
		//const RenderBase::PrimitiveHandle& priHandle = getOwner()->GetPrimitive(m_patchIndex);
		const RenderBase::PrimitiveHandle& priHandle = m_TerrainNode->GetPrimitiveHandle();

		if (m_TerrainNode->GetRenderEnable() && priHandle.IsValid())
		{
			GlobalMaterialParam* pGMP = Material::GetGlobalMaterialParams();

			int passindex = (eCustomized == passType) ? 0 : passType -1;
			const Util::Array< GPtr<MaterialPass> >& passList = material->GetTech()->GetPassList();
			if(passindex >= passList.Size())			
				return;
			const GPtr<MaterialPass>& pass = passList[passindex];

			const Graphic::Camera* pCamera = Graphic::GraphicSystem::Instance()->GetRenderingCamera();

			Math::matrix44 mvp = Math::matrix44::multiply(pCamera->GetViewProjTransform(), GetTransform());
			pGMP->SetMatrixParam(eGShaderMatMVP, mvp);
			pGMP->SetMatrixParam(eGShaderMatM,GetTransform());

			if ( pass->isGlobalParamUsed( renderable->GetShaderMask(passType), eGShaderMatInverseM )//如果没有使用这几个全局的矩阵参数，就不求逆矩阵了，提高效率
				|| pass->isGlobalParamUsed( renderable->GetShaderMask(passType), eGShaderMatInverseTransposeM ) )
			{
				Math::matrix44 Inverse, InvTranspose;
				Inverse      = Math::matrix44::inverse(GetTransform());
				InvTranspose = Math::matrix44::transpose(Inverse);

				pGMP->SetMatrixParam(eGShaderMatInverseM,Inverse);
				pGMP->SetMatrixParam(eGShaderMatInverseTransposeM,InvTranspose);

			}

			if (pass->isGlobalParamUsed( renderable->GetShaderMask(passType), eGShaderMatMV ))
			{
				Math::matrix44 mv = Math::matrix44::multiply(pCamera->GetViewTransform(), GetTransform());
				pGMP->SetMatrixParam(eGShaderMatMV, mv);
			}

			if ( IsUseLM() && IsLMHandleValid() )
			{
				// lightmap support
				RenderBase::TextureHandle lightmapHandle = getOwner()->GetLMTextureHandle( 0 );

				int lmMode = (int)getOwner()->GetLightmapMode();
				if (lmMode > 0)
				{
					// lightmap support
					RenderBase::TextureHandle lightmapHandle = getOwner()->GetLMTextureHandle( 1 );
					pGMP->SetTextureParam(eGShaderTexLightmap2, lightmapHandle);
			}

				// set lightmap params
				// set lightmap params
				pGMP->SetVectorParam_X(eGShaderMatLMEnable, (float)(lmMode + 1.0f));
				pGMP->SetVectorParam(eGShaderMatLMTexParam, float4(1.0f,1.0f,0.0f,0.0f));
			}
			else
			{
				pGMP->SetVectorParam(eGShaderMatLMEnable, float4(0.0f,0.0f,0.0f,0.0f));
			}


			if (passType && material->GetTech()->IsTemplateTech())
			{
				rd->RenderForward(passType, priHandle, customizedMaterial);					
			}
			else
			{
				rd->RenderForward(eForward, priHandle, customizedMaterial);
			}

			// reset lightmap params
			pGMP->SetVectorParam(eGShaderMatLMEnable, float4(0.0f,0.0f,0.0f,0.0f));
		}
	}

	inline bool TerrainRenderObject::IsUseLM() const
	{
		return getOwner()->IsUseLM();
	}

	inline bool TerrainRenderObject::IsLMHandleValid() const
	{
		return getOwner()->IsLMTextureHandleValid();
	}

	inline TerrainRenderObject::Owner* TerrainRenderObject::getOwner() const
	{
		return GetOwner<Owner>();
	}

	Resources::Index16Container::value_type* TerrainRenderObject::GetTerrainNodeIndexData()
	{
		return GetTerrainNode()->GetIndexData();
	}

	SizeT TerrainRenderObject::GetTerrainNodeIndexDataCount()
	{
		return GetTerrainNode()->GetIndexDataCount();
	}

	const Resources::PositionData::Elem* TerrainRenderObject::GetTerrainNodePosData()
	{
		return GetTerrainNode()->GetPositionData();
	}

	SizeT TerrainRenderObject::GetTerrainNodePosCount()
	{
		return GetTerrainNode()->GetPostionDataCount();
	}




}