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Separate Rendering on Fixed Pipeline

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Hello all. I have 2 textures with color and some alpha chanel data. And i must to blend it in next way some factor; result.color = tex1.color * (factor) + tex2.color * (1- factor) result.alpha = tex1.alpha * (factor) + tex2.alpha * (1- factor) Anybody know, can I did it on fixed pipeline? Thanks in advanse! Andriy Sorich

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Sure. Check out the mfctex example.

You want to use SetTextureStageStat() to set multitexture blending (modulation, addition, etc). You can do this independantly for the rgb channels and alpha channel. For the factor, check into D3DRS_TEXTUREFACTOR and D3DTOP_BLENDFACTORALPHA.

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Yes.
I''m doing so, but it looks strange:

SD3dDeviceI->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
SD3dDeviceI->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE);
SD3dDeviceI->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE);

SD3dDeviceI->SetRenderState(D3DRS_SEPARATEALPHABLENDENABLE, TRUE);
SD3dDeviceI->SetRenderState(D3DRS_SRCBLENDALPHA, D3DBLEND_ONE);
SD3dDeviceI->SetRenderState(D3DRS_DESTBLENDALPHA, D3DBLEND_ONE);

SD3dDeviceI->SetRenderState(D3DRS_TEXTUREFACTOR, factor);

SD3dDeviceI->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
SD3dDeviceI->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
SD3dDeviceI->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_BLENDFACTORALPHA);
SD3dDeviceI->SetTextureStageState(1, D3DTSS_COLORARG1, D3DTA_TEXTURE);
SD3dDeviceI->SetTextureStageState(1, D3DTSS_COLORARG2, D3DTA_CURRENT);

SD3dDeviceI->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1);
SD3dDeviceI->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
SD3dDeviceI->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_BLENDFACTORALPHA);
SD3dDeviceI->SetTextureStageState(1, D3DTSS_ALPHAARG1, D3DTA_CURRENT);
SD3dDeviceI->SetTextureStageState(1, D3DTSS_ALPHAARG2, D3DTA_TEXTURE);

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