dx9 游戏终极开发 例子有关问题

dx9 游戏终极开发 例子问题
本帖最后由 Bourbon1795 于 2013-01-14 15:23:23 编辑 bool InitializeD3D(HWND hWnd, bool fullscreen)
{
   D3DDISPLAYMODE displayMode;
   g_D3D = Direct3DCreate9(D3D_SDK_VERSION);
   if(g_D3D == NULL) return false;
   if(FAILED(g_D3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,
      &displayMode))) return false;

   D3DPRESENT_PARAMETERS d3dpp;
   ZeroMemory(&d3dpp, sizeof(d3dpp));


   if(fullscreen)
      {
         d3dpp.Windowed = FALSE;
         d3dpp.BackBufferWidth = 640;
         d3dpp.BackBufferHeight = 480;
      }
   else
      d3dpp.Windowed = TRUE;
   d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
   d3dpp.BackBufferFormat = displayMode.Format;

   if(FAILED(g_D3D->CreateDevice(D3DADAPTER_DEFAULT,
      D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING,
      &d3dpp, &g_D3DDevice))) return false;

   if(!InitializeObjects()) return false;

   return true;
}


bool InitializeObjects()
{
   unsigned long col = D3DCOLOR_XRGB(255, 255, 255);

   stD3DVertex objData[] =
      {
         { 420.0f, 150.0f, 0.5f, 1.0f, col, },
         { 420.0f, 350.0f, 0.5f, 1.0f, col, },
         { 220.0f, 150.0f, 0.5f, 1.0f, col, },
         { 220.0f, 350.0f, 0.5f, 1.0f, col, },
      };

   if(FAILED(g_D3DDevice->CreateVertexBuffer(sizeof(objData), 0,
             D3DFVF_VERTEX, D3DPOOL_DEFAULT, &g_VertexBuffer,
             NULL))) return false;

   void *ptr;

   if(FAILED(g_VertexBuffer->Lock(0, sizeof(objData),
      (void**)&ptr, 0))) return false;
  memcpy(ptr, objData, sizeof(objData));
   g_VertexBuffer->Unlock();
   return true;
}
void RenderScene()
{
   g_D3DDevice->Clear(0, NULL, D3DCLEAR_TARGET,
  D3DCOLOR_XRGB(0,0,0), 1.0f, 0);
   g_D3DDevice->BeginScene();
      g_D3DDevice->SetStreamSource(0, g_VertexBuffer, 0,                      sizeof(stD3DVertex));
      g_D3DDevice->SetFVF(D3DFVF_VERTEX);
      g_D3DDevice->DrawPrimitive(D3DPT_LINELIST, 0, 2);

   g_D3DDevice->EndScene();
   g_D3DDevice->Present(NULL, NULL, NULL, NULL);
}


void Shutdown()
{
   if(g_D3DDevice != NULL) g_D3DDevice->Release();
   if(g_D3D != NULL) g_D3D->Release();
   if(g_VertexBuffer != NULL) g_VertexBuffer->Release();
   g_D3DDevice = NULL;
   g_D3D = NULL;
   g_VertexBuffer = NULL;
}[/code]

为什么去掉这个memcpy 就不会显示三角形了呢？ （lock 和unlock之间的）
有没有大神愿意告诉我？ dx9?游戏终极开发 dx9??游戏终极开发 游戏
[解决办法]
有没有柳暗花明。