• The first xml, TableData/Items/StructureDeconstruct.xml, allows setting up what structures you want to pull down, how, and what you might get:
  

  ...
  <STRUCTURE><!-- wooden planks, medium -->
  	<usDeconstructItem>5832</usDeconstructItem>
  	<usItemToCreate>1544</usItemToCreate>
  	<usCreatedItemStatus>100</usCreatedItemStatus>
  	<szTileSetName>deb_02.sti</szTileSetName>
  	<allowedtile>1</allowedtile>
  	<allowedtile>2</allowedtile>
  </STRUCTURE>
  ...
  

  Read this as: if we have item #5832 (a shovel in AIMNAS) in our primary hand, then clicking on a structure of .sti library deb_02.sti which is tileset member 1 or 2 will destroy this structure and give us item #1544 (wooden planks, medium) with 100% status.
• The second xml, TableData/Items/StructureConstruct.xml, allows setting up what structures we can create with items:
  

  ...
  <<STRUCTURE><!--wooden planks, medium 2x1 -->
  	<usCreationItem>1544</usCreationItem>
  	<usItemStatusLoss>100</usItemStatusLoss>
  	<szTileSetName>deb_02.sti</szTileSetName>
  	<northfacingtile>1</northfacingtile>
  	<southfacingtile>1</southfacingtile>
  	<eastfacingtile>2</eastfacingtile>
  	<westfacingtile>2</westfacingtile>
  </STRUCTURE>
  ...
  

  Read this as: if we have item #1544 in our primary hand (wooden planks, medium, sound familiar?), then we will build a structure of sti library deb_02.sti from this. If we face north or south doing so, we will build number 1 from that set, otherwise 2.
  
  Of course, in order for this to work, the map needs to have these sti sets. What we don't know we cannot build... Yes, I've tried getting rid of that (which would allow us to build anything anywhere), but that part of the code is so whack that it is on hold.
• As AIMNAS was built with thing like this in mind, many of these constructions will work in all maps there. For example, you can now create earthwork in all maps with a simple shovel, as Smeagol made room for that in his tilesets. This is not possible in vanilla maps, so you'll need AIMNAS or a similarly advanced map mod to get the most out of this feature.
• You can also create walls this way (not shown in the video, but it works). As deconstructing walls would allow a player to flatten an entire city right under the enemies eyes with just a spy and a shovel (I'm looking at you, Gorro!), I do not allow tearing down walls this way in the code.
• As you can set up what you get depending on what direction you face, you can set up your fortifications very detailed.
• Via <usCreatedItemStatus> and <usItemStatusLoss>, you can set up very detailed how much of your 'resource' is used. For example, the concertina I've used loses 1% per tile, thereby making constructions less of an item hassle.
• For increased immersion, you can set up what items deconstruct what - so a hammer could be used for rocks, a shovel for earth, a wrench for machines, a wirecutter for concertina wire, an axe for trees... now your dreams of playing a lumberjack have come true! :axe:
• The Items.xml ItemFlag values 2 (FULL_SANDBAG) and 8 (CONCERTINA) aren't use anymore. I'll likely reuse those numbers soon, so removing these numbers from your items won't hurt.

Cheers! To you 3 and to the summer convention. This improved feature opens up a wide array of gameplay opportunities, impressive!

Will it be possible to make window in a wooden wall with the axe or chainsaw?

Will it be possible to make window in a wooden wall with the axe or chainsaw?

Sevenfm

Will it be possible to make window in a wooden wall with the axe or chainsaw?

You can already do this by using TNT.

One of many applications: Now we can have a full crafting system.
With TableData/Items/StructureDeconstruct.xml, we can gather the ressources from the environment.
With transforms and merges, we can shape/refine them into different materials.
With TableData/Items/StructureConstruct.xml, we can make some of the items placeble on the terrain.

EDIT: It could be interesting that the deconstructed tile be replaced by something (or nothing, as it is now), defined by xml (StructureDeconstruct.xml).
For example, a deconstructed tree with an axe becomes a log, or a mined rock with a pick stays a rock (the same or a smaller/different one, without the "ore"?)

One of many applications: Now we can have a full crafting system.
With TableData/Items/StructureDeconstruct.xml, we can gather the ressources from the environment.
With transforms and merges, we can shape/refine them into different materials.
With TableData/Items/StructureConstruct.xml, we can make some of the items placeble on the terrain.

EDIT: It could be interesting that the deconstructed tile be replaced by something (or nothing, as it is now), defined by xml (StructureDeconstruct.xml).
For example, a deconstructed tree with an axe becomes a log, or a mined rock with a pick stays a rock (the same or a smaller/different one, without the "ore"?)

Grim

One of many applications: Now we can have a full crafting system.
With TableData/Items/StructureDeconstruct.xml, we can gather the ressources from the environment.
With transforms and merges, we can shape/refine them into different materials.
With TableData/Items/StructureConstruct.xml, we can make some of the items placeble on the terrain.

EDIT: It could be interesting that the deconstructed tile be replaced by something (or nothing, as it is now), defined by xml (StructureDeconstruct.xml).
For example, a deconstructed tree with an axe becomes a log, or a mined rock with a pick stays a rock (the same or a smaller/different one, without the "ore"?)

Mining rocks for ore? What's next, running a magically enchanted automining system on tofu?

StructureConstruct.xml allows setting up what exact objects an be placed depending on the location you are facing - so yes, that is possible.

• Sandbags no longer need to be filled, item #1541 has been removed.
• Empty sandbags (#1540) are now a 'stack' of bags that can be used to create 100 sandbag structures and can be merged. As a result sandbags are no longer so scarce, as one 15-item delivery from BR should be enough for quite a few barriers
• Item flags 1 and 4 (EMPTY_SANDBAG and SHOVEL) are no longer used.