Block walking monsters only line flag.

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Block walking monsters only line flag.

Postby Enjay » Sun Nov 29, 2020 2:12 pm

There are lots of blocking (and other) line flags available in UDMF for GZDoom
Image
But there is one that has not been implemented which I would find very useful, more so than some of the ones that do exist. Specifically, I am referring to "block walking monsters" so that a line could be set up that allows floating monsters to cross but not walking ones. I have had situations where such a feature would have been very useful on several occasions but I don't think, for example, that I have ever needed the block floating monster flag (not saying it wouldn't have its uses, just that I have never needed it).

At present, mappers resort to tricks like making a very narrow invisible deep trench that is deeper than a walking monster's step height, or sometimes invisible mid textures set to act as walkable textures are used if also blocking the player is desirable, or abusing the CANTLEAVEFLOORPIC actor flag. In fact, it's one of the few things left in mapping that requires a "hack" rather than being done with proper built-in features.

So it would be nice to have this flag if it can be done.

Thank you for reading.
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Re: Block walking monsters only line flag.

Postby Rachael » Sun Nov 29, 2020 2:57 pm

I think this would be easy enough to add, I just need an "ok" to do it because it involves modifying the UDMF map reader.
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Re: Block walking monsters only line flag.

Postby Graf Zahl » Sun Nov 29, 2020 3:58 pm

Why do you need an 'ok'? Of course adding new properties requires modifying the map reader so what's so special here?
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Re: Block walking monsters only line flag.

Postby Rachael » Sun Nov 29, 2020 4:21 pm

Changing the UDMF spec?
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Re: Block walking monsters only line flag.

Postby Graf Zahl » Sun Nov 29, 2020 4:47 pm

Yeah, add a new entry to the spec, same as everybody who ever added something before had to do as well.
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