PDA

View Full Version : Genesis FPS engine


Zeus
08-19-2020, 02:26 PM
Impressive. I believe he's working on a Doom port.


https://www.youtube.com/watch?v=Gbg_06eXTRY
Black_Tiger
08-19-2020, 03:22 PM
It may just happen to be doing the same thing, but it looks like a hack of the Mega Drive Duke Nukem 3D port.
Sik
08-19-2020, 05:49 PM
Since when does that port support sectors with multiple heights?
NeoVamp
08-19-2020, 07:45 PM
sectors with multiple heights

https://iruntheinternet.com/lulzdump/images/doom-guy-nodding-kid-computer-thumbs-up-1407541825R.gif
Niiiiiiiiice!!
Zeus
08-24-2020, 06:45 PM
E1M1


https://www.youtube.com/watch?v=UGbrrrLdmrk
turboxray
08-24-2020, 07:12 PM
E1M1


https://www.youtube.com/watch?v=UGbrrrLdmrk

Why does it look all melty?
mo68K
08-26-2020, 11:53 PM
Why does it look all melty?

Probably because it lacks of perspective correction, which is one of the bottlenecks in rendering.

mo68K.
Sik
08-27-2020, 08:12 PM
Except it does have perspective correction, it's just being computed wrong (looks like not enough precision).
mo68K
08-28-2020, 03:48 PM
Looking the video I still think there is no perspective correction, I really think the developer is using some sort of Affine, like you can see in this example: https://youtu.be/RyYEGdGwnFs

And like I said previously, correcting the texture through distance was very heavy for many computers back in the day, because dividing by z.

Why I think it's just Affine without perspective correction is because in the video when clipping Near-Z you can see (Around 10s to 11s) this:

https://i.imgur.com/ZzBUjYl.png

mo86K.
turboxray
08-28-2020, 06:14 PM
Looking the video I still think there is no perspective correction, I really think the developer is using some sort of Affine, like you can see in this example: https://youtu.be/RyYEGdGwnFs

And like I said previously, correcting the texture through distance was very heavy for many computers back in the day, because dividing by z.

Why I think it's just Affine without perspective correction is because in the video when clipping Near-Z you can see (Around 10s to 11s) this:

https://i.imgur.com/ZzBUjYl.png

mo86K.
Yeah I highly doubt it's doing any sort of texture mapping. So it's not an affine texture warping thing.