Init code

HRESULT InitializeSurfaces()
    {
        HRESULT hr = S_OK;

        assert(m_pDev);

        SAFE_RELEASE(m_pTexture);
        SAFE_RELEASE(m_pSurface);
        SAFE_RELEASE(m_pSysMemSurface);
        SAFE_RELEASE(m_pRenderToSurface);

        V_RETURN(D3DXCreateTexture(m_pDev, 1, 1, 1, D3DUSAGE_RENDERTARGET, D3DFMT_R32F, D3DPOOL_DEFAULT, &m_pTexture));
        V_RETURN(m_pTexture->GetSurfaceLevel(0, &m_pSurface));
        V_RETURN(m_pSurface->GetDesc(&m_desc));
        V_RETURN(m_pDev->CreateOffscreenPlainSurface(1, 1, D3DFMT_R32F, D3DPOOL_SYSTEMMEM, &m_pSysMemSurface, nullptr));
        V_RETURN(D3DXCreateRenderToSurface(m_pDev, 1, 1, D3DFMT_R32F, FALSE, D3DFMT_UNKNOWN, &m_pRenderToSurface));

        return hr;
    }

    HRESULT InitializeVertexBuffer()
    {
        HRESULT hr = S_OK;

        SAFE_RELEASE(m_pVB);
        V_RETURN(m_pDev->CreateVertexBuffer(sizeof(vec3_ty),D3DUSAGE_DYNAMIC|D3DUSAGE_WRITEONLY, D3DFVF_XYZ, D3DPOOL_DEFAULT, &m_pVB, nullptr));

        return hr;
    }

    HRESULT InitializeEffect()
    {
        HRESULT hr = S_OK;

        ID3DXBuffer* pErrors = nullptr;
        SAFE_RELEASE(m_pEffect);
        DWORD dwShaderFlags = 0;
#if defined( DEBUG ) || defined( _DEBUG )
        dwShaderFlags |= D3DXSHADER_DEBUG;
#endif
        if (FAILED(D3DXCreateEffectFromFile(m_pDev, cvEFFECT_FILE.c_str(), 0, 0, dwShaderFlags, 0, &m_pEffect, &pErrors)))
        {
            if (pErrors)
            {
                pErrors->Release();
            }

            return E_FAIL;
        }

        return hr;
    }

    HRESULT InitializeMatrices()
    {
        vec3_ty zero(0,0,0);
        vec3_ty unitY(0,1,0);
        vec3_ty unitZ(0,0,1);

        D3DXMatrixLookAtLH(&m_matView, &zero, &unitZ, &unitY);
        D3DXMatrixOrthoLH(&m_matProjection, 1, 1, 0.1f, 10.0f);
        D3DXMatrixTranslation(&m_matWorld, -1/2, -1/2, 0);
        m_viewport.X = 0;
        m_viewport.Y = 0;
        m_viewport.Width = 1;
        m_viewport.Height = 1;
        m_viewport.MinZ = 0.01f;
        m_viewport.MaxZ = 1.0f;

        return S_OK;
    }