The Problem

When trying to do something like detail a long path, I want to have the blocks on the edges be a different block. For example, I want a dirt path, but to prevent grass from spreading on it, I need to have coarse dirt between the grass and the dirt.

The problem is that there's no simple way to select or mask areas based on what blocks are adjacent to them. Therefore, I cannot mask blocks that are found on the edges of the "pathway", as there isn't any method to determine what the edge even is.

A Solution

We already have offset masks to overlay (>) or underlay (<) blocks amongst one another, as well as expression masks, so I can't imagine it being that difficult to implement a new "adjacency" mask.

Example:

/gmask ~grass_block
//replace dirt coarse_dirt

or something along those lines. I feel like this could be incredibly useful feature and wouldn't be too hard to implement, either!

Alternatives

Supposedly, you're already able to do this with expression masks by using =queryRel(), however I simply cannot figure out how to correctly utilize it—if possible—with the given documentation. So, while I think it would be the most convenient to add support for adjacency masks, simply providing more detail or examples in the expression mask's EngineHub documentation would still go a long way.

Anything Else?

No response

#2056

#2056

Ah, sorry for the duplicate. Didn't see this one. I'll close the issue :p