Transparent 3d Slopes?

SonicSpinDash · Post by **SonicSpinDash** » Fri Nov 11, 2005 8:34

In the current version of gzdoom can you change the alpha value of sloped 3d sectors, i.e. make transparent slopes? If yes, how? If not, will we be able to in the future?

Post by **Graf Zahl** » Fri Nov 11, 2005 9:40

You can't. The handling of sloped translucent surfaces would make the handling significantly more complex. I have no idea yet whether this might be supported in the future.

Post by **solarsnowfall** » Fri Nov 11, 2005 21:41

I would fly to Germany, and buy you a pint, if this did make its way in.

Post by **Graf Zahl** » Fri Nov 11, 2005 22:21

If you find a way to reliably sort all the sprites into the level's geometry without screwing up - then I could do it. So far any attempt I made either created corruption in certain places or was too slow.

Besides what should I do with a pint?

Post by **solarsnowfall** » Fri Nov 11, 2005 22:49

Graf Zahl wrote:If you find a way to reliably sort all the sprites into the level's geometry without screwing up

So is it sprite mapping that is holding this back? If so, what if it was limited only to solid 3d floors, for sloped glass or what-have-you? Would this still be problematic?

Post by **Graf Zahl** » Fri Nov 11, 2005 22:56

Yes. The problem is that all translucent polygons have to be sorted back to front. As long as there are no sloped flats it's easy. First sort everything horizontally and then sort the resulting sub-groups back to front. But with sloped floors I can't sort horizontally anymore so I have to use the BSP to sort the entire geometry (not so hard) and then sort all the sprites correctly (which includes splits along planes and other not so nice things) This is what is causing me severe headaches.

Sussudio · Post by **Sussudio** » Tue Oct 13, 2009 12:22

4 years of development have gone by and I wonder if this could be done more easily now that the engine has matured, though maybe it's already in and I just couldn't figure out the correct tagging.

Post by **Remmirath** » Tue Oct 13, 2009 14:05

No, it's not in.

The only way to get a translucent 3d slope is to give it 64 flag bits, that is the additive rendering of the 3d floor.

Sussudio · Post by **Sussudio** » Fri Oct 16, 2009 22:24

Good enough for me. Thank you.

Post by **Graf Zahl** » Fri Oct 16, 2009 22:40

Morpheus wrote:No, it's not in.

The only way to get a translucent 3d slope is to give it 64 flag bits, that is the additive rendering of the 3d floor.

What? I missed that? Thanks for pointing it out. It wouldn't work properly anyway. Fixed for the next revision.

DRD Team

Transparent 3d Slopes?

Transparent 3d Slopes?

Re: Transparent 3d Slopes?

Re: Transparent 3d Slopes?

Re: Transparent 3d Slopes?

Re: Transparent 3d Slopes?