placing nodes with on_construct

[qwrwed]

I am going to try and place 6 nodes with only one placed by the player, but I don't know how to use on_construct to place nodes. Right now I am using after_place_node, but that only works for adding a second node because there is no placer to activate the "after_place_node" function for any more. How do I place a node (with facedir) on_construct?

How do I use add_node or set_node to create other nodes? i am making a plasma screen TV mod which has 6 nodes, arranged like this:
1 2 3
4 5 6
5 is the node that is placed, and when the player places it the other 5 nodes should generate. However, I don't know how to do this, and looking in the code for the stargate mod, doors mod and beds mod did not help - the first two were too complicated for this, and I don't even know where I'm going wrong using code from beds, so I would like to start from scratch. The nodes (which are nodeboxes) are plasmascreen:screen1, plasmascreen:screen2 etc. up to plasmascreen:screen6.

[PilzAdam]

Code: Select all

-- pos is the position of the "5" node in the format {x=1, y=2 z=3}
pos.y = pos.y + 1
minetest.set_node(pos, {name="tv:screen_2})

[Sokomine]

If your plasma screen ought to switch pictures/channels like the TV from homedecor or the TV from Redcrabs server, perhaps you ought to take a diffrent approach and just make the nodebox larger than one node. That does work. Sideeffects are that nodes may really overlap.

[PilzAdam]

If your plasma screen ought to switch pictures/channels like the TV from homedecor or the TV from Redcrabs server, perhaps you ought to take a diffrent approach and just make the nodebox larger than one node. That does work. Sideeffects are that nodes may really overlap.

And the texture just repeats itself, wich doesnt look good.

[webdesigner97]

If you need your manually placed node to facedir, make sure to add param2 to the node:

Code: Select all

    after_place_node = function(pos,placer,itemstack)
        --Don't forget to modify the <pos> table
        minetest.set_node(pos,{name="bla", param2=minetest.dir_to_facedir(placer:get_look_dir())})
    end

And for changing pictures: Why not use a texture animation?

[qwrwed]

Thanks webdesigner and PilzAdam, I will try that. Sokomine, I did that after making the first 6 nodes (it seemed simpler than using set_node) but I found that even when using a 32x48 texture, it just reverted to 6 16x16 textures. As for animation, I'm not that good with textures (maybe I will ask VanessaE) so I'll try to get the placement of the TV and a stand for it first. Currently, I have used black for the borders and dark grey for the screen.

[qwrwed]

I get this error:

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17:42:54: ERROR[main]: ServerError: LuaError: error: ...cuments\minetest-0.4.7\bin\..\mods\plasmascreen\init.lua:146: calling 'get_node' on bad self (table expected, got userdata)

The definition with the after_place_node is this:

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minetest.register_node("plasmascreen:screen5", {
    description = "Plasma TV",
    tiles = {"plasmascreen_screen.png", "plasmascreen_back.png", "plasmascreen_screen.png", "plasmascreen_screen.png", "plasmascreen_back.png", "plasmascreen_screen5.png"},
    paramtype = "light",
    paramtype2 = "facedir",
    drawtype = "nodebox",
    node_box = {
                type = "fixed",
                fixed = {
                            {-0.5000, -0.5000, 0.4375, 0.5000, 0.5000, 0.5000},
                            {-0.5000, -0.5000, 0.3750, 0.5000, -0.3125, 0.4375},
                        }
    },
        selection_box = {
                type = "fixed",
                fixed = {
                            {-0.5000, -0.5000, 0.4375, 0.5000, 0.5000, 0.5000},
                            {-0.5000, -0.5000, 0.3750, 0.5000, -0.3125, 0.4375},
                        }
    },
    groups = {snappy=1,choppy=2,oddly_breakable_by_hand=2},
        
 after_place_node = function(pos,placer,itemstack)
        pos.y = pos.y + 1
        minetest.set_node(pos,{name="plasmascreen:screen2", param2=minetest.dir_to_facedir(placer:get_look_dir())})
    end
})

This happened when I tried to modify the papyrus_bed/beds code as well.

[webdesigner97]

Which line is 146?

[qwrwed]

(previous problem solved)
Another problem: when I place screen5, screen4 appears to the left of it as planned, but instead of appearing to the right, screen6 appears in place of screen5. Here is the code:

Code: Select all

after_place_node = function(pos,placer,itemstack)
    local param2 = minetest.get_node(pos).param2
        if param2 == 0 then
            pos.x = pos.x-1
        minetest.set_node(pos,{name="plasmascreen:screen4", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        elseif param2 == 1 then
            pos.z = pos.z+1
        minetest.set_node(pos,{name="plasmascreen:screen4", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        elseif param2 == 2 then
            pos.x = pos.x+1
        minetest.set_node(pos,{name="plasmascreen:screen4", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        elseif param2 == 3 then
            pos.z = pos.z-1
        minetest.set_node(pos,{name="plasmascreen:screen4", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        end
    local param2 = minetest.get_node(pos).param2
        if param2 == 0 then
            pos.x = pos.x+1
        minetest.set_node(pos,{name="plasmascreen:screen6", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        elseif param2 == 1 then
            pos.z = pos.z-1
        minetest.set_node(pos,{name="plasmascreen:screen6", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        elseif param2 == 2 then
            pos.x = pos.x-1
        minetest.set_node(pos,{name="plasmascreen:screen6", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        elseif param2 == 3 then
            pos.z = pos.z+1
        minetest.set_node(pos,{name="plasmascreen:screen6", param2=minetest.dir_to_facedir(placer:get_look_dir())})
        end
    end
})

Everything before the first "end" works fine.
Also, the nodes I place aren't being saved when I exit the world, although it is recorded in the terminal.

[qwrwed]

How do I place a node (with facedir) on_construct?
(see first post for more details)

[SuperStarSonic]

If you need your manually placed node to facedir, make sure to add param2 to the node:

Code: Select all

    after_place_node = function(pos,placer,itemstack)
        --Don't forget to modify the <pos> table
        minetest.set_node(pos,{name="bla", param2=minetest.dir_to_facedir(placer:get_look_dir())})
    end

And for changing pictures: Why not use a texture animation?

--Don't forget to modify the <pos> table

what does this mean?

[SuperStarSonic]

do you have to deconstruct the 'pos' table into separate elements stacked into a 'list-like' structure?

Code: Select all

minetest.set_node({pos.x, pos.y, pos.z}, name="node_name")