魔神游戏客户端应用程序结构 - 仓酷云

class CD3DApplication
该类负责游戏逻辑控制，游戏场景更新，在MVC模式中，是属于控制单元。
主要数据结构如下
D3DPRESENT_PARAMETERS m_d3dpp; // 游戏显示参数
HWND m_hWnd; // 游戏主窗口句柄
LPDIRECT3D9 m_pD3D; // d3d对象
LPDIRECT3DDEVICE9 m_pd3dDevice; // d3d 设备
D3DSURFACE_DESC m_d3dsdBackBuffer; // d3d 设备后缓冲信息
DWORD m_dwWindowStyle; // windows窗口类型
// Variables for timing
FLOAT m_fTime; // 游戏当前时间
FLOAT m_fFPS; // 游戏桢率
// Overridable variables for the app
TCHAR* m_strWindowTitle; // 窗口标题
fullscreen<span style="font-family: 宋体; font-size: 10.5pt; text-indent: 15.75pt; background-color: rgb(255, 255, 255); line-height: 1.5;"> </span>

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1．INT CD3DApplication::Run()
a. 在该函数中首先负责处理windows消息
BOOL bGotMsg;
MSG msg;
msg.message = WM_NULL;
PeekMessage( &msg, NULL, 0U, 0U, PM_NOREMOVE );
while( WM_QUIT != msg.message )
{
bGotMsg = PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE );
if( bGotMsg )
{
// if( 0 == TranslateAccelerator( m_hWnd, hAccel, &msg ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
}
b. 然后调用Render3DEnvironment()函数更新游戏画面。
2．Render3DEnvironment()
a. 首先测试d3d设备是否有效
if( FAILED( hr = m_pd3dDevice->TestCooperativeLevel() ) )
{
// If the device was lost, do not render until we get it back
if( D3DERR_DEVICELOST == hr )
return S_OK;
if( D3DERR_DEVICENOTRESET == hr )
{
if( m_bWindowed )
{
D3DAdapterInfo* pAdapterInfo = &m_Adapters[m_dwAdapter];
m_pD3D->GetAdapterDisplayMode( m_dwAdapter, &pAdapterInfo->d3ddmDesktop );
m_d3dpp.BackBufferFormat = pAdapterInfo->d3ddmDesktop.Format;
}
b. 得到游戏的全局时间
FLOAT fAppTime = DXUtil_Timer( TIMER_GETAPPTIME );
c. 更新场景
if( m_bFrameMoving || m_bSingleStep )
{
// Store the time for the app
m_fTime = fAppTime;
m_fElapsedTime = fElapsedAppTime;
// Frame move the scene
if( FAILED( hr = FrameMove() ) )
return hr;
m_bSingleStep = FALSE;
}
d. 渲染场景
// Render the scene as normal
if ( !m_bPauseRendering )
{
if( FAILED( hr = Render() ) )
return hr;
}
// Keep track of the frame count
static FLOAT fLastTime = 0.0f;
static DWORD dwFrames = 0L;
FLOAT fTime = DXUtil_Timer( TIMER_GETABSOLUTETIME );
++dwFrames;<span style="font-family: 新宋体; font-size: 9pt; line-height: 1.5; text-indent: 17.25pt; background-color: rgb(255, 255, 255);"> </span>

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