genesis-3d_engine/Engine/addons/vegetation/InstanceMap.cc

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

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#include "stdneb.h"
#include "vegetation/InstanceMap.h"
#include "vegetation/VegetationServer.h"
#include <functional>

namespace Vegetation
{	
	using namespace RenderBase;
	using namespace Math;

	__ImplementClass( Vegetation::VegeInstanceMap, 'VEIM', Core::RefCounted);

#ifdef __GENESIS_EDITOR__
	uint INSTANCEDATA_POS::Index = 0;
#endif

	const GPtr<VegeInstanceMap> VegeInstanceMap::NullVegeInstMap(NULL);
	//------------------------------------------------------------------------
	VegeInstanceMap::VegeInstanceMap()
		:mIsActive(false)
		,mVegeObject(NULL)
		,m_bHWInstancing(false)
		,m_nVertCount(g_VertexCount)
		,m_nIndicesCount(g_IndexCount)
		,m_nVertexDataSize(0)
		,m_nInstUsingCount(0)
		,m_nVertLimitCount(0)
		,m_bInstDirty(true)
	{

	}

	//------------------------------------------------------------------------
	VegeInstanceMap::~VegeInstanceMap()
	{

	}
	//--------------------------------------------------------------------------------
	bool VegeInstanceMap::BuildPrimitive()
	{
		return false;
	}
	//------------------------------------------------------------------------
	void VegeInstanceMap::Active(void)
	{
		VegetationServer::Instance()->_attachVegetationInstMap( GPtr<VegeInstanceMap>(this) );
	}
	//------------------------------------------------------------------------
	void VegeInstanceMap::DeActive(void)
	{
		VegetationServer::Instance()->_deattachVegetationInstMap( GPtr<VegeInstanceMap>(this) );
	}	
	//------------------------------------------------------------------------
	void VegeInstanceMap::_onActivate(void)
	{
		n_assert( !mIsActive );
		mIsActive = true;
	}
	//------------------------------------------------------------------------
	void VegeInstanceMap::_onDeactivate(void)
	{
		n_assert( mIsActive );
		mIsActive = false;
	}
	//------------------------------------------------------------------------
	void VegeInstanceMap::Update()
	{

	}
	//--------------------------------------------------------------------------------
	void VegeInstanceMap::UpdateInstData()
	{

	}
	//------------------------------------------------------------------------
	void VegeInstanceMap::AddInstance(const INSTANCEDATA_POS& inst)
	{
		mInstances.Append(inst);		

	}
	//--------------------------------------------------------------------------------
	void VegeInstanceMap::_calcAxisVec(ushort axis, Math::vector& retVec)
	{
		switch(axis	)
		{
		case  0:
			retVec = Math::vector(1,0,0);
			break;
		case 2:
			retVec = Math::vector(0,0,1);
			break;
		default:
			retVec = Math::vector(0,1,0);
			break;
		}
	}
	//--------------------------------------------------------------------------------
	void VegeInstanceMap::BuildVertexComponents(const GPtr<Resources::MeshRes>& meshres)
	{
		m_vVerDeclare.Clear();
		if ( meshres.isvalid() )
		{
			//SizeT vertexByteSize = 0;
			{
				n_assert(meshres);

				if( meshres->GetVertexData<PositionData>() )
				{
					m_vVerDeclare.Append( VertexComponent(VertexComponent::Position,0, VertexComponent::Float3) );
				}

				if ( meshres->GetVertexData<NormalData>() )
				{
					m_vVerDeclare.Append( VertexComponent(VertexComponent::Normal,0, VertexComponent::Float3) );
				}

				if ( meshres->GetVertexData<ColorData>() )
				{
					//if ( RenderSystem::Instance()->GetRendererType() == eRendererD3D9 )
					if(true)
					{
						m_vVerDeclare.Append( VertexComponent(VertexComponent::Color,0, VertexComponent::ColorBGRA) );
					}
					else
					{
						n_error(" should decide device use bgra or rgba");
					}
				}

				const SizeT deviceSupportTexCount = 8;	// should be defined by render system
				for ( IndexT iTex = 0; iTex < deviceSupportTexCount; ++iTex )
				{
					if ( meshres->GetVertexData<TexCoordData>(iTex) )
					{
						m_vVerDeclare.Append( VertexComponent(VertexComponent::TexCoord, iTex, VertexComponent::Float2) );
					}
					else
					{
						break;
					}
				}	

				m_vVerDeclare.Append( VertexComponent(VertexComponent::TexCoord,1, VertexComponent::Float2) );
			}
		}
		else
		{
			//SizeT vertexByteSize = 0;
			{
				m_vVerDeclare.Append( VertexComponent(VertexComponent::Position,0, VertexComponent::Float3) );
				m_vVerDeclare.Append( VertexComponent(VertexComponent::Normal,0, VertexComponent::Float3) );

				// @todo D3D<33><44>OpenGLES<45><53>OpenGL<47><4C> should use native color format
				m_vVerDeclare.Append( VertexComponent(VertexComponent::Color,0, VertexComponent::ColorBGRA) );

				m_vVerDeclare.Append( VertexComponent(VertexComponent::TexCoord, 0, VertexComponent::Float2) );

				m_vVerDeclare.Append( VertexComponent(VertexComponent::TexCoord, 1, VertexComponent::Float2) );
			}
		}
	}
	//--------------------------------------------------------------------------------
	bool VegeInstanceMap::CreateInstanceVBuffer(  GPtr<RenderBase::PrimitiveGroup>& pPrimiGoup)
	{
		if( mInstances.Size() < 1 ) 
			return false;

		return true;
	}
	//--------------------------------------------------------------------------------
	void VegeInstanceMap::_FillInstanceVBuffer( GPtr<VertexBuffer>& pVBO  )
	{


	}
	//--------------------------------------------------------------------------------
	void VegeInstanceMap::SetParentMatrix( const Math::matrix44& m  )
	{
		if ( mVegeObject == NULL)
		{
			return;
		}

		//const Math::matrix44& invMatrix = Math::matrix44::inverse(mVegeObject->GetWorldMatrix());

		for ( IndexT idx = 0; idx < mInstances.Size(); ++idx )
		{
			//mInstances[idx].pos = mInstances[idx].pos.transformPoint(invMatrix);
			mInstances[idx].pos = mInstances[idx].pos.transformPoint(m);	

		}
		//m_bInstDirty = true;
	}

}