C++ (Cpp) LPD3DXEFFECT::GetDesc示例

//-----------------------------------------------------------------------------
// Name: GetNextTechnique
// Desc:
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::GetNextTechnique(INT nDir, BOOL bBypassValidate)
{
    D3DXEFFECT_DESC effect;
    UINT_PTR iTechnique = m_iTechnique;

    m_pEffect->GetDesc(&effect);

    for(;;)
    {
        iTechnique += nDir;

        if(((INT_PTR) iTechnique) < 0)
            iTechnique = effect.Techniques - 1;

        if(iTechnique >= effect.Techniques)
            iTechnique = 0;

        if(nDir && (iTechnique == m_iTechnique))
            break;

        if(!nDir)
            nDir = 1;


        m_pEffect->SetTechnique((LPCSTR) iTechnique);

        if(bBypassValidate || (iTechnique == effect.Techniques - 1) || 
          (m_bDrawCaustics || !m_pEffect->IsParameterUsed("tCAU")) && SUCCEEDED(m_pEffect->Validate()))
        {
            m_iTechnique = iTechnique;

            char szText[256];
            sprintf(szText, "Water - Technique %d", m_iTechnique);
            SetWindowText(m_hWnd, szText);

            return S_OK;
        }
    }

    m_pEffect->SetTechnique((LPCSTR) m_iTechnique);
    return E_FAIL;
}