targetting and LOS

[d_m]

"No, no, I'm not shooting at the bat. I'm aiming at the tree behind it. Before you tell me the AC of the tree, let's see if I make the roll to miss the bat."

Kind of like learning to fly in the Hitchhiker's Guide...

[PowerDiver]

AD&D (d20, new version) I think, has a detailed method dealing with LOS and targeting enemies with partial cover.

When I see D&D and LOS in the same sentence, I remember the rules that made it harder to miss something in between than to hit your target.

"No, no, I'm not shooting at the bat. I'm aiming at the tree behind it. Before you tell me the AC of the tree, let's see if I make the roll to miss the bat."

[buzzkill]

AD&D (d20, new version) I think, has a detailed method dealing with LOS and targeting enemies with partial cover. I'm not very familiar with it, but I think it's similar to what's being proposed here. Something like if the center of the players grid can 'see' any portion of the enemies grid (or vice-versa).

I presume hat this method has already been extensively tested and works well.

I'm just throwing it out there. Please don't hurt me.

[d_m]

This proposal is good--in particular it addresses some annoying inconsistencies with the current treatment of passwall.

Also, I assume your LOS would be symmetric. I consider that one of the most sorely-needed features.

[will_asher]

I like that idea.
(wanted to just thumbs up the idea without having to leave a message with four words because I don't really have anything to add..)

[Donald Jonker]

The boundary case is

##D
##
@

and it could go either way without any particular benefits or disadvantages I can see. Probably it is better to say not visible.

Besides making more intuitive sense, if that case remained not visible, it would offer a nice tactical wrinkle where you (or a monster) could flee around a corner.

This all looks very good.

[Magnate]

Seconded. This approach is used in wargaming for good reason.

[PowerDiver]

I think there is a fairly clean way to approach targeting and LOS. It requires a single change in viewpoint, but then everything flows.


Currently, walls are considered to take up entire spaces. If you change that
perspective so that walls in a corridor only extend halfway everything becomes easy. Define two squares to be visible with respect to each other if the line connecting their centers does not pass through a wall. Consider a passwall monster in a wall to be centered at the center, but partially extending outward if the wall is adjacent to a non-wall. After all, at a minimum the mouth has to be outside the wall if it can breathe at you.


Then for anything like

################D
@

the @ and D have LOS on each other, even if the D is an ethereal dragon in a wall.

The boundary case is

##D
##
@

and it could go either way without any particular benefits or disadvantages I can see. Probably it is better to say not visible.

IMO it is absolutely vital for

#m
#
@#

to be a case where the @ can see the death mold. Also, the player is allowed to move diagonally which does not make sense if the walls completely fill the #s and thus would touch. Once you accept these points, I think the argument proceeds in a straightforward manner to the interpretation I give above.

Even if you don't like the interpretation, it leads to a clean model with good gameplay properties, and that is the important thing.