CEGUI渲染冲突问题

在Directx中使用CEGUI时渲染状态会产生一些冲突，导致DX画出来的图形不能正常显示，原因是CEGUI的Direct3D9Renderer::beginRendering() 更改了渲染状态和一些变换，所以解决方法是在DX画图形之前恢复你的渲染状态和变换：

void graphicApp::beginRenderMode()
{
    pDevice->SetFVF(NULL);

    pDevice->SetRenderState(D3DRS_LIGHTING, FALSE);
    pDevice->SetRenderState(D3DRS_FOGENABLE, FALSE);
    pDevice->SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE);
    pDevice->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);
    pDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_CCW);
    //pDevice->SetRenderState(D3DRS_CULLMODE,D3DCULL_NONE);
    pDevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_SOLID);
    pDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, FALSE);
    pDevice->SetRenderState(D3DRS_ZWRITEENABLE, TRUE);
    pDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);
    pDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE);
    pDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ZERO);

    pDevice->SetSamplerState(0, D3DSAMP_ADDRESSU, D3DTADDRESS_WRAP);
    pDevice->SetSamplerState(0, D3DSAMP_ADDRESSV, D3DTADDRESS_WRAP);
    pDevice->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
    pDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);

    pDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
    pDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_CURRENT);
    pDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
    pDevice->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
    pDevice->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_CURRENT);
    pDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1);
    pDevice->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);


    D3DXMATRIX startMat(1,0,0,0,
        0,1,0,0,
        0,0,1,0,
        0,0,0,1);//初始矩阵

    pDevice->SetTransform(D3DTS_WORLD, &startMat);

    D3DXVECTOR3 position(0.0f,0.0f,-3.0f);
    D3DXVECTOR3 targect(0.0f,0.0f,0.0f);
    D3DXVECTOR3 up(0.0f,1.0f,0.0f);
    D3DXMATRIX V;

    D3DXMatrixLookAtLH(&V,&position,&targect,&up);
    pDevice->SetTransform(D3DTS_VIEW,&V);

    D3DXMATRIX proj;
    D3DXMatrixPerspectiveFovLH(&proj,D3DX_PI * 0.5f,width/height,1.0f,1000.0f);
    pDevice->SetTransform(D3DTS_PROJECTION,&proj);


}