Jump to content
  • Advertisement

Archived

This topic is now archived and is closed to further replies.

adriano_usp

transparency - optimizations

This topic is 5345 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hi programmers, I normally use the following procedure to have total transparency, but my fps decreases a bit: g_pD3DDevice->SetRenderState(D3DRS_SRCBLEND,D3DBLEND_SRCALPHA); g_pD3DDevice->SetRenderState(D3DRS_DESTBLEND,D3DBLEND_INVSRCALPHA); ... g_pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE); Please, would you have some hints about avoiding a big performance loss (when I use transparency)? Thanks.

Share this post


Link to post
Share on other sites
Advertisement
quote:
Original post by adriano_usp
Hi programmers,

I normally use the following procedure to have total transparency, but my fps decreases a bit:

g_pD3DDevice->SetRenderState(D3DRS_SRCBLEND,D3DBLEND_SRCALPHA);
g_pD3DDevice->SetRenderState(D3DRS_DESTBLEND,D3DBLEND_INVSRCALPHA);
...
g_pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);

Please, would you have some hints about avoiding a big performance loss (when I use transparency)?

Thanks.



Try this :

- First, in your data pool, try to separate plain objects from transparents object - ( or plain primitives from transparent ones ). So when you''ll display your scene, you will be able to set those flags only for transparents objects. I think that that''s the major optimization you can do, for it would also reduce your sort time ( plain objects don''t need to be sort... )

- Use alpha test for objects that only have an "all-or-nothing" transparent value ( it means objects with maps where alpha value is either 0 or 255 ) like fences, ....

Sorry for my poor english, but I think you''ve understand !

Share this post


Link to post
Share on other sites

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!