billboardmanager.cpp

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// BillBoardManager.cpp: implementation of the CBillBoardManager class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"

const DWORD BILLBOARDVERTEX::FVF = D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1;

HRESULT CreateBillBoardBuf( LPDIRECT3DVERTEXBUFFER9 *pVB, float fSize, DWORD dwColor)
{
	HRESULT hr;

	if(FAILED( g_pApp->GetD3dDevice()->CreateVertexBuffer( 4*sizeof(BILLBOARDVERTEX),
									D3DUSAGE_DYNAMIC|D3DUSAGE_WRITEONLY,
									BILLBOARDVERTEX::FVF,D3DPOOL_DEFAULT, pVB, NULL) ))
	{
		OutputDebugString("[角菩] CEffectBillBoard::CreateBillBoardBuf");
		return E_FAIL;
	}

	BILLBOARDVERTEX *pVertices;
	float fSizeDiv2 = fSize/2.0f;
	
	if( FAILED( hr = (*pVB)->Lock( 0, 0, (void**)&pVertices, 0 ) ) )
		return hr;
	
	// first triangle
	pVertices[0].p = D3DXVECTOR3(-fSizeDiv2, -fSizeDiv2, 0.0f);
	pVertices[0].color    = dwColor;
	pVertices[0].tu       = 0.0f;
	pVertices[0].tv       = 1.0f;
	
	pVertices[1].p = D3DXVECTOR3(-fSizeDiv2, fSizeDiv2, 0.0f);
	pVertices[1].color    = dwColor;
	pVertices[1].tu       = 0.0f;
	pVertices[1].tv       = 0.0f;
	
	pVertices[2].p = D3DXVECTOR3(fSizeDiv2, -fSizeDiv2, 0.0f);
	pVertices[2].color    = dwColor;
	pVertices[2].tu       = 1.0f;
	pVertices[2].tv       = 1.0f;
	
	pVertices[3].p = D3DXVECTOR3(fSizeDiv2, fSizeDiv2, 0.0f);
	pVertices[3].color    = dwColor;
	pVertices[3].tu       = 1.0f;
	pVertices[3].tv       = 0.0f;
	
	if( FAILED( hr = (*pVB)->Unlock() ) ) return hr;

	return(S_OK);
}
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CBillBoardManager::CBillBoardManager()
{
	m_pVBOneBillBoard = NULL;
	m_pVBBillBoard = NULL;
	m_dwBDiscard = 0;
}

CBillBoardManager::~CBillBoardManager()
{
	SAFE_RELEASE(m_pVBOneBillBoard);
	SAFE_RELEASE(m_pVBBillBoard);
}

HRESULT CBillBoardManager::Create()
{
	RestoreDeviceObjects();
	
	return S_OK;
}

HRESULT CBillBoardManager::AddBillBoard()
{
	return S_OK;
}

HRESULT CBillBoardManager::InvalidateDeviceObjects()
{
	SAFE_RELEASE(m_pVBOneBillBoard);
	SAFE_RELEASE(m_pVBBillBoard);

	return S_OK;
}

HRESULT CBillBoardManager::RestoreDeviceObjects()
{
	if(FAILED( g_pApp->GetD3dDevice()->CreateVertexBuffer( 4*sizeof(BILLBOARDVERTEX),
									0, BILLBOARDVERTEX::FVF,D3DPOOL_DEFAULT, &m_pVBBillBoard, NULL) ))
	{
		OutputDebugString("[角菩] CBillBoardManager::CreateVertexBuffer");
		return E_FAIL;
	}

	if(FAILED( g_pApp->GetD3dDevice()->CreateVertexBuffer( m_dwBDiscard*sizeof(BILLBOARDVERTEX),
									D3DUSAGE_DYNAMIC|D3DUSAGE_WRITEONLY,
									BILLBOARDVERTEX::FVF,D3DPOOL_DEFAULT, &m_pVBBillBoard, NULL) ))
	{
		OutputDebugString("[角菩] CBillBoardManager::CreateVertexBuffer");
		return E_FAIL;
	}

	return S_OK;
}