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

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

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#include "stdneb.h"
#include "DeferredLightingPass.h"
#include "graphicsystem/Light/Light.h"
#include "graphicsystem/Camera/RenderPipeline/ActiveLight.h"
#include "graphicsystem/Camera/RenderPipeline/RenderPipelineManager.h"
#include "foundation/meshbuilder/parallelogrambuilder.h"
#include "foundation/meshbuilder/conebuilder.h"
#include "foundation/meshbuilder/boxbuilder.h"
#include "graphicsystem/GraphicSystem.h"
#include "graphicsystem/Renderable/GraphicRenderer.h"
#include "materialmaker/parser/GenesisShaderParser.h"
#include "foundation/math/newMath/new_scalar.h"
namespace Graphic
{

	static const float S_COS15 = Math::n_cos((float)PI / 12.0f);

	using namespace Math;
	using namespace RenderBase;
	////<2F><><EFBFBD><EFBFBD>

	static const float3 P_Center(0.0f,0.0f, 0.0f);
	static const float P_Side = 2.0f;

	static const int S_Tessellation  = 12; //tessellation
	static const int S_VertexCount = CONE_VERTEX_COUNT(S_Tessellation);
	static const int S_IndexCount = CONE_INDEX_COUNT(S_Tessellation);
	static const float S_Radius = 1.0f;
	static const float3 S_Center(0.0f,-1.0f, 0.0f);

	static const float S_TopHeight = 1.0f;
	struct _light_vertex
	{
	public:
		Math::float3 position;
	};

	void _setupVertexIndex(Graphic::VertexBufferData2& vbd2, SizeT vertex_count, Graphic::IndexBufferData2& ibd2, SizeT index_count)
	{
		vbd2.Setup(vertex_count, sizeof(_light_vertex), RenderBase::BufferData::Static, RenderBase::PrimitiveTopology::TriangleList, true);
		ibd2.Setup(index_count, RenderBase::BufferData::Static, RenderBase::IndexBufferData::Int16, true);
	}

	__ImplementClass(DeferredLightingPass,'DFLP',Core::RefCounted)

		DeferredLightingPass::DeferredLightingPass()
	{
	}

	DeferredLightingPass::~DeferredLightingPass()
	{
	}
	void DeferredLightingPass::Init()
	{
		_buildSunLight();
		_buildDirectionalLight();
		_buildPointLight();
		_buildSpotLight();
	}

	void DeferredLightingPass::RenderActiveLights(PipelineParamters& params)
	{
		//ActiveLightCollection& active_lights = params.m_activeLights.GetActiveLights();; 
		//const GPtr<RenderToTexture>& light_target = params.m_camera->GetDeferredLightMap();


		//GraphicSystem* gs = GraphicSystem::Instance();
		//n_assert(NULL != gs);

		//gs->SetRenderTarget(light_target, 0, RenderBase::RenderTarget::ClearAll);



		//ActiveLightCollection::Iterator it = active_lights.Begin();
		//ActiveLightCollection::Iterator end = active_lights.End();
		//while(it != end)
		//{
		//	_renderLight(*it);
		//	++it;
		//}
	}

	void DeferredLightingPass::_buildSunLight()
	{
		Graphic::VertexBufferData2 vbd2;
		Graphic::IndexBufferData2 ibd2;
		_setupVertexIndex(vbd2, RECT_VERTEX_COUNT, ibd2, RECT_INDICES_COUNT);
		_light_vertex* pos = vbd2.GetBufferPtr<_light_vertex>();
		ushort* indices = ibd2.GetBufferPtr<ushort>();

		float3 top(0.0f, 1.0f, 0.0f);
		float3 right(1.0f, 0.0f, 0.0f);
		float3 center(0.0f, 0.0f, 0.0f);
		MeshBuilder::ParallelogramBuilder::Set(pos, top, right, center, 0);
		MeshBuilder::ParallelogramBuilder::SetIndices(indices);

		mSunLightMesh.mPrimHandle = Graphic::GraphicSystem::Instance()->CreatePrimitiveHandle(&vbd2, &ibd2);
		Util::StringAtom fileName("sys:Deferred_SunLight.shader");
		mSunLightMesh.mMaterial = GenesisMaterialMaker::MakeFromShader(fileName);
		mSunLightMesh.mShaderHandle = const_cast<RenderBase::GPUProgramHandle*>(&mSunLightMesh.mMaterial->GetTech(0)->GetDefaultPass()->GetGPUProgramHandle(0));
	}
	void DeferredLightingPass::_buildDirectionalLight()
	{
		Graphic::VertexBufferData2 vbd2;
		Graphic::IndexBufferData2 ibd2;
		_setupVertexIndex(vbd2, RECT_VERTEX_COUNT, ibd2, RECT_INDICES_COUNT);
		_light_vertex* pos = vbd2.GetBufferPtr<_light_vertex>();
		ushort* indices = ibd2.GetBufferPtr<ushort>();

		float3 top(0.0f, 1.0f, 0.0f);
		float3 right(1.0f, 0.0f, 0.0f);
		float3 center(0.0f, 0.0f, 0.0f);
		MeshBuilder::ParallelogramBuilder::Set(pos, top, right, center, 0);
		MeshBuilder::ParallelogramBuilder::SetIndices(indices);

		mDirectionalLightMesh.mPrimHandle = Graphic::GraphicSystem::Instance()->CreatePrimitiveHandle(&vbd2, &ibd2);
		Util::StringAtom fileName("sys:Deferred_DirectionalLight.shader");
		mDirectionalLightMesh.mMaterial = GenesisMaterialMaker::MakeFromShader(fileName);
		mDirectionalLightMesh.mShaderHandle = const_cast<RenderBase::GPUProgramHandle*>(&mDirectionalLightMesh.mMaterial->GetTech(0)->GetDefaultPass()->GetGPUProgramHandle(0));

	}
	void DeferredLightingPass::_buildPointLight()
	{
		Graphic::VertexBufferData2 vbd2;
		Graphic::IndexBufferData2 ibd2;
		_setupVertexIndex(vbd2, BOX_VERTEX_COUNT, ibd2, BOX_INDICES_COUNT);

		_light_vertex* pos = vbd2.GetBufferPtr<_light_vertex>();
		ushort* indices = ibd2.GetBufferPtr<ushort>();
		MeshBuilder::BoxBuilder::SetPositions(pos, sizeof(_light_vertex), 0, P_Side, P_Side, P_Side, P_Center);
		MeshBuilder::BoxBuilder::SetIndices(indices);

		mPointLightMesh.mPrimHandle = Graphic::GraphicSystem::Instance()->CreatePrimitiveHandle(&vbd2, &ibd2);
		Util::StringAtom fileName("sys:Deferred_PointLight.shader");
		mPointLightMesh.mMaterial = GenesisMaterialMaker::MakeFromShader(fileName);
		mPointLightMesh.mShaderHandle = const_cast<RenderBase::GPUProgramHandle*>(&mPointLightMesh.mMaterial->GetTech(0)->GetDefaultPass()->GetGPUProgramHandle(0));

	}
	void DeferredLightingPass::_buildSpotLight()
	{
		////Ч<><D0A7><EFBFBD>ǣ<EFBFBD>׶<EFBFBD><D7B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>㣬<EFBFBD><E3A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>z<EFBFBD><7A><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		Graphic::VertexBufferData2 vbd2;
		Graphic::IndexBufferData2 ibd2;
		_setupVertexIndex(vbd2, S_VertexCount, ibd2, S_IndexCount);

		_light_vertex* pos = vbd2.GetBufferPtr<_light_vertex>();
		ushort* indices = ibd2.GetBufferPtr<ushort>();
		MeshBuilder::ConeBuilder::SetPositions(pos, sizeof(_light_vertex), 0, S_Tessellation, S_Radius, S_TopHeight, S_Center);
		MeshBuilder::ConeBuilder::SetIndices(indices, S_Tessellation);

		matrix44 trans = matrix44::rotationx(N_PI * 0.5f);
		MeshBuilder::TransformPositions(pos, S_VertexCount, sizeof(_light_vertex), 0, trans);


		mSpotLightMesh.mPrimHandle = Graphic::GraphicSystem::Instance()->CreatePrimitiveHandle(&vbd2, &ibd2);
		Util::StringAtom fileName("sys:Deferred_SpotLight.shader");
		mSpotLightMesh.mMaterial = GenesisMaterialMaker::MakeFromShader(fileName);
		mSpotLightMesh.mShaderHandle = const_cast<RenderBase::GPUProgramHandle*>(&mSpotLightMesh.mMaterial->GetTech(0)->GetDefaultPass()->GetGPUProgramHandle(0));
	}

	void DeferredLightingPass::_renderLight(const ActiveLightInfo& activeLight)
	{
		Light::LightType light_type = activeLight.light->GetLightType();
		switch (light_type)
		{
		case Light::eSunLight:
			{
				_renderSunLight(activeLight);
			}
			break;
		case Light::eDirectionalLight:
			{
				_renderDirectionalLight(activeLight);
			}
			break;
		case Light::ePointLight:
			{
				_renderPointLight(activeLight);
			}
			break;
		case Light::eSpotLight:
			{
				_renderSpotLight(activeLight);
			}
			break;
		default:
			{

			}
			break;
		}
	}
	void DeferredLightingPass::_renderSunLight(const ActiveLightInfo& activeLight)
	{
		const GPtr<Light>& light = activeLight.light; 
		GraphicSystem* gs = GraphicSystem::Instance();
		n_assert(NULL != gs);

		float4 color = light->GetLightColor() * light->GetLightIntensity();

		GlobalMaterialParam* pGMP = Material::GetGlobalMaterialParams();
		pGMP->SetVectorParam(eGShaderVecLightDir0, light->GetTransform().get_zaxis());
		pGMP->SetVectorParam(eGShaderVecLightDiffuse0, color);



		const Util::Array<GPtr<Camera> >& smcList = light->GetShadowMapCameraList();
		float lightCameraFarDistance[4] = {0.f,0.f,0.f,0.f};
		for (SizeT i = 0; i < smcList.Size(); ++i)
		{
			if (i == 0)
				pGMP->SetMatrixParam(eGShaderMatLightV,smcList[i]->GetViewTransform());

			lightCameraFarDistance[i] = smcList[i]->GetCameraSetting().GetZFar() - smcList[i]->GetCameraSetting().GetZNear();
			pGMP->SetMatrixParam(static_cast<GlobalMatrixParamIndex>(eGShaderMatLightP0 + i ),smcList[i]->GetProjTransform());
		}
		pGMP->SetVectorParam(eGShaderVecLightCameraFar,float4(lightCameraFarDistance[0],lightCameraFarDistance[1],lightCameraFarDistance[2],lightCameraFarDistance[3]));



		const GPtr<MaterialPass>& pass = mSunLightMesh.mMaterial->GetTech()->GetDefaultPass();
		GraphicRenderer::SetMaterialCommonParams(pass, 0);
		GraphicRenderer::SetMaterialCustomParams(mSunLightMesh.mMaterial->GetParamList(), pass, 0);

		gs->SetShaderProgram(*mSunLightMesh.mShaderHandle);
		gs->SetRenderState(mSunLightMesh.mMaterial->GetTech()->GetDefaultPass()->GetRenderStateObject(), 0);

		gs->DrawPrimitive(mSunLightMesh.mPrimHandle);

	}
	void DeferredLightingPass::_renderDirectionalLight(const ActiveLightInfo& activeLight)
	{
		const GPtr<Light>& light = activeLight.light; 
		GraphicSystem* gs = GraphicSystem::Instance();
		n_assert(NULL != gs);

		float4 color = light->GetLightColor() * light->GetLightIntensity();
		GlobalMaterialParam* pGMP = Material::GetGlobalMaterialParams();
		pGMP->SetVectorParam(eGShaderVecLightDir0, light->GetTransform().get_zaxis());
		pGMP->SetVectorParam(eGShaderVecLightDiffuse0, color);

		const GPtr<MaterialPass>& pass = mDirectionalLightMesh.mMaterial->GetTech()->GetDefaultPass();
		GraphicRenderer::SetMaterialCommonParams(pass, 0);
		GraphicRenderer::SetMaterialCustomParams(mDirectionalLightMesh.mMaterial->GetParamList(), pass, 0);

		gs->SetShaderProgram(*mDirectionalLightMesh.mShaderHandle);
		gs->SetRenderState(mDirectionalLightMesh.mMaterial->GetTech()->GetDefaultPass()->GetRenderStateObject(), 0);

		gs->DrawPrimitive(mDirectionalLightMesh.mPrimHandle);

	}
	void DeferredLightingPass::_renderPointLight(const ActiveLightInfo& activeLight)
	{
		const GPtr<Light>& light = activeLight.light; 
		GraphicSystem* gs = GraphicSystem::Instance();
		n_assert(NULL != gs);

		GlobalMaterialParam* pGMP = Material::GetGlobalMaterialParams();

		const matrix44& view = pGMP->GetMatrixParam(eGShaderMatV);

		float4 light_pos = light->GetLightPos();
		const float4& camPos = pGMP->GetVectorParam(eGShaderVecCameraPos);
		float4 cam_to_light = light_pos - camPos;

		matrix44 trans = matrix44::identity();

		float scale = light->GetLightRange();
		trans.mx[0][0] = scale;
		trans.mx[1][1] = scale;
		trans.mx[2][2] = scale;		
		float4 pos = matrix44::transform(view, light_pos);
		trans.set_position(pos);


		float4 color = light->GetLightColor() * light->GetLightIntensity();

		Math::float4 attenuation;
		attenuation.set_x(light->GetConstantAttenuation());
		attenuation.set_y(light->GetLinearAttenuation());
		attenuation.set_z(light->GetQuadraticAttenuation());

		pGMP->SetMatrixParam(eGShaderMatM, trans);
		pGMP->SetVectorParam(eGShaderVecLightDir0, light->GetTransform().get_zaxis());
		pGMP->SetVectorParam(eGShaderVecLightDiffuse0, color);
		pGMP->SetVectorParam(eGShaderVecLightPos0, light_pos);
		pGMP->SetVectorParam(eGShaderVecLightAttenuation0, attenuation);

		const GPtr<MaterialPass>& pass = mPointLightMesh.mMaterial->GetTech()->GetDefaultPass();
		GraphicRenderer::SetMaterialCommonParams(pass, 0);
		GraphicRenderer::SetMaterialCustomParams(mPointLightMesh.mMaterial->GetParamList(), pass, 0);

		gs->SetShaderProgram(*mPointLightMesh.mShaderHandle);
		gs->SetRenderState(mPointLightMesh.mMaterial->GetTech()->GetDefaultPass()->GetRenderStateObject(), 0);

		gs->DrawPrimitive(mPointLightMesh.mPrimHandle);
	}

	void DeferredLightingPass::_calSpotWorld(const Light* light, Math::matrix44& trans)
	{

		float z = light->GetLightRange();

		float cut = light->GetCosHalfOuterAngle();
		float l = z / cut;
		float xy = n_sqrt(l * l - z * z) / S_COS15;//<2F><><EFBFBD><EFBFBD>Բ<EFBFBD>İ뾶
		matrix44 scale_mat = matrix44::scaling(xy, xy, z);
		trans = matrix44::multiply(light->GetTransform(), scale_mat);
	}

	void DeferredLightingPass::_renderSpotLight(const ActiveLightInfo& activeLight)
	{
		const Light* light = activeLight.light; 
		GraphicSystem* gs = GraphicSystem::Instance();
		n_assert(NULL != gs);

		GlobalMaterialParam* pGMP = Material::GetGlobalMaterialParams();

		matrix44 world;
		_calSpotWorld(light, world);

		float4 dir = light->GetTransform().get_zaxis();
		dir.set_w(light->GetCosHalfOuterAngle());
		float4 color = light->GetLightColor() * light->GetLightIntensity();

		Math::float4 attenuation;
		attenuation.set_x(light->GetConstantAttenuation());
		attenuation.set_y(light->GetLinearAttenuation());
		attenuation.set_z(light->GetQuadraticAttenuation());
		attenuation.set_w(light->GetExponent());

		float4 light_pos = light->GetLightPos();


		pGMP->SetMatrixParam(eGShaderMatM, world);
		pGMP->SetVectorParam(eGShaderVecLightDir0, dir);
		pGMP->SetVectorParam(eGShaderVecLightDiffuse0, color);
		pGMP->SetVectorParam(eGShaderVecLightPos0, light_pos);
		pGMP->SetVectorParam(eGShaderVecLightAttenuation0, attenuation);

		const GPtr<MaterialPass>& pass = mSpotLightMesh.mMaterial->GetTech()->GetDefaultPass();
		GraphicRenderer::SetMaterialCommonParams(pass, 0);
		GraphicRenderer::SetMaterialCustomParams(mSpotLightMesh.mMaterial->GetParamList(), pass, 0);


		gs->SetShaderProgram(*mSpotLightMesh.mShaderHandle);
		gs->SetRenderState(mSpotLightMesh.mMaterial->GetTech()->GetDefaultPass()->GetRenderStateObject(), 0);

		gs->DrawPrimitive(mSpotLightMesh.mPrimHandle);
	}
}