FOSS gamedev and creative worlds

Wooden plank and corresponding wooden slab nearby.
Sand can not be placed on slab.

that is how voxel games work.
one node in one position at a time.
the slab is occupying the whole 1*1m node with the upper half being air.
You are requesting for the sand to occupy the same positition as it cannot be half in the lower and half in the upper node. The node grid the map information is stored in is 1*1m, that is hardcoded into the engine.

This is the same reason why placing torches, papyrus or slabs underwater displaces a complete cube of water.
This is simply how most voxelbased games work.

twoelk wrote:that is how voxel games work.
one node in one position at a time.
the slab is occupying the whole 1*1m node with the upper half being air.
You are requesting for the sand to occupy the same positition as it cannot be half in the lower and half in the upper node. The node grid the map information is stored in is 1*1m, that is hardcoded into the engine.

This is the same reason why placing torches, papyrus or slabs underwater displaces a complete cube of water.
This is simply how most voxelbased games work.

But nevertheless the player "feels" the half of cube. Being on slab, player is half meter higher, not 1 meter higher.

Your claim is not entirely true. You can actually place a slab on another slab (as long they are equal) to form a full block.
For everything else, this doesn't work as you want to. Technicaly, you CAN place blocks on top of the slab, but only on the voxel above the slab's voxel. Those are the rules.

But what do you want? How do you suggest to “fix” this?
Do you want the sand block to be half inside the voxel occupied by the wooden slab, and half in the voxel above it? Sorry, this would be breaking THE core rule of all voxel games like Minetest Game: Only one “thing” per voxel. This rule is very crucial to the gameplay. It's not going to changed.

comboblock

stack slabs

I would recommend the first mod, pithy's

edit: woops, sorry the link for pithy's comboblocks is here

"Nodes can not be placed on slabs"

That awkward moment when slabs are nodes.

I was recently creating a 'realistic' model of a local building in Minetest and had a similar issue trying to duplicate a brick and cement pattern. If you are looking for a cosmetic effect and you'll use it for a large number of blocks, create a custom block with the texture representing the 'half slab half node. It isn't a perfect solution, and I wouldn't make a custom block for single use, but when using hundreds of '2/3 brick 1/3 cement blocks, creating a custom block works great for me. I have a 'mod' that's really nothing more than a generic container for a half dozen or so custom blocks I had to create. I hope this helps. (BTW - isn't the player character able to stand on a slap and be in 'two nodes' at once because it is an 'entity' or something like that?)

Wuzzy wrote:Do you want the sand block to be half inside the voxel occupied by the wooden slab, and half in the voxel above it?

Yes.

sorcerykid wrote:"Nodes can not be placed on slabs"

That awkward moment when slabs are nodes.

That is awkward indeed. I see air. I see emptiness. Why should I think of it as something solid? I see it and understand that it could be occupied with something I place there.
Slab is optical illusion.

Even a slab is a full node and you can't place nodes on "half" positions

burli wrote:Even a slab is a full node and you can't place nodes on "half" positions

Why can player be on "half" positions?

Because players aren't nodes. Would look a bit odd if a player "jumps" from node position to node position

A player is an object not a node.

Think of 3D voxel engines like the old gaming consoles that used 2D tiles and sprites. You could not position tiles outside of the grid. Only sprites could be moved independently.

so there you go..., make a 1+1/2 object... which pretends to be a node ; )

If you use pithy's comboblocks, you can use the two slabs combo you want, then place a full node of the top slab atop it... (solved). Thank you for shopping with us, have a nice day :D