Force minetest to load an area

[npx]

We are working on a new dimension for our mod nssm and we would like to add some schematics to it. The problem is I don't understand how to force minetest to load an area that is really far from the player.

I tried to reproduce the code that Pilzadam used for his nether mod, but there are some differences in our methods. (I need to place some schematics while Pilzadam builds his portal directly using lua code).

Anyways he uses two functions:

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Code: Select all

minetest.get_voxel_manip():read_from_map(pos, pos)
minetest.emerge_area(vector.subtract(pos, 80), vector.add(pos, 80))


I can't understand the differences between these two function (I read the wiki for them). The first doesn't work for me and it gives me this error:

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Code: Select all

minetest/mods/nssb/mapgen.lua:792: attempt to index a nil value


I can't understand which is the nil value because the variable "pos" does exist and it is set.

The second function seems to work because it doesn't give any error and after it I can add the schematic, but when I teleport to the place where I have added the schematic the world isn't loaded and when finally it gets loaded the schematic is there but some of its block have not been correctly placed.

Can someone help me?
Thank You

[paramat]

PilzAdam's nether mod now uses a schematic for the portal, i coded it. See that for an example.
Make sure you have 'force place' set to true in 'place schematic', or, per-node force place for each solid node in the schematic.
Also, every solid node in the schematic must have 'is ground content = false' to avoid being removed by overgenerating caves. For example natural materials like stone can be removed. So create mod duplicate nodes that have ground content = false.

[npx]

Thank You for your help.
I will study your version of the nether mod!