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Transparency

Started by vmware Apr 1, 2009 at 2:50 AM 3 replies 1k views

Original Post

Apr 1, 2009 at 2:50 AM

Hi, I am trying to enable transparency. My vertices are defined in CUSTOMVERTEX structs. I guess that the first byte should stand for transparency, but even if I use that value, my vertices will remain opaque. How can I enable transparency? Thanks.

dmatter

597

dmatter

Apr 1, 2009 at 2:54 AM

Which language and API are you using?

I might be able to save some time by linking you to the Drunken Hyena tutorial on blending, but that assumes C++ and D3D9.

vmware

Author

vmware

Apr 1, 2009 at 3:02 AM

I am using Direct3D with C++.

I had also tried this before that is mentioned in the tutorial,
but it doesn't work.

g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE,true);
g_pd3dDevice->SetTextureStageState(0,D3DTSS_ALPHAOP,D3DTOP_SELECTARG1);
g_pd3dDevice->SetTextureStageState(0,D3DTSS_ALPHAARG1,D3DTA_DIFFUSE); g_pd3dDevice->SetTextureStageState(0,D3DTSS_ALPHAARG2,D3DTA_TEXTURE);

What am I doing wrong?

vmware

Author

vmware

Apr 1, 2009 at 3:06 AM

Okay, for the first time it works now,
after adding these three lines of code.
Hope I am doing the proper way.

g_pd3dDevice->SetRenderState(D3DRS_SRCBLEND,D3DBLEND_SRCALPHA);
g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND,D3DBLEND_INVSRCALPHA);
g_pd3dDevice->SetRenderState(D3DRS_BLENDOP,D3DBLENDOP_ADD);

dmatter

597

dmatter

Apr 1, 2009 at 6:18 AM

Quote:
Original post by vmware
Hope I am doing the proper way.

Your are doing it correctly, although as you might have guessed there is more than one 'proper way' to configure blending.

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