Post your modding questions here

[VanessaE]

A texturable sun/moon would be nice, and has been discussed before. The result of that discussion was that it would be somewhat non-trivial to do, namely because of the color-shifting that would need to be applied to the two as they rise/set.

[pandaro]

I can understand the other functions but not this:

on_blast = func(pos, intensity),
^ intensity: 1.0 = mid range of regular TNT
^ If defined, called when an explosion touches the node, instead of
removing the node

--how to a block NOT explode?
-how to calibrate the power of a explosion
I use TNT PilzAdam, I would like:
-a block does not explode,
-one explode if the explosion occurs at a short distance (1)
-and another block if the distance is greater, however, explodes (2 blocks away)

when I call this function what it does exactly?
where it needs to be made for it to work properly?

[pandaro]

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Code: Select all

local print_hello=function()
  print("hello")
end
local dtime=10.0
minetest.register_globalstep(function(dtime)
  hello()
end)

Seeking a way to update a formspec.
I will not clog up the engine by calling a function every 0.5sec or less.
Is there a way to enlarge dtime? what I posted does not seem to run.

[Casimir]

Just a guess, there might be a better solution.

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Code: Select all

minetest.register_globalstep(function(dtime)
   ifnot time then time = dtime end
   if time >= 10 then
      hello()
      time = 0
   end
   time = time + dtime
end


[pandaro]

Just a guess, there might be a better solution.

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

minetest.register_globalstep(function(dtime)
   ifnot time then time = dtime end
   if time >= 10 then
      hello()
      time = 0
   end
   time = time + dtime
end


it works, thanks

[Evergreen]

I have a question about stairs and slabs. I'm making a birch tree mod, and I need to make stairs and slabs from it. Here is the code I used to add stairs and slabs:

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Code: Select all

stairs.register_stair_and_slab("birch", "birch:wood",
        {cracky=3},
        {"birch_wood.png"},
        "Birch Wood stair",
        "Birch Wood slab")

But I get a run error. How do I fix?

[0gb.us]

I have a question about stairs and slabs. I'm making a birch tree mod, and I need to make stairs and slabs from it. Here is the code I used to add stairs and slabs:

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Code: Select all

stairs.register_stair_and_slab("birch", "birch:wood",
        {cracky=3},
        {"birch_wood.png"},
        "Birch Wood stair",
        "Birch Wood slab")

But I get a run error. How do I fix?

The error is caused by a bug in the stable version of stairs. Copy the code in stars and change the prefix "Stairs:" to the prefix for your plugin.

[Evergreen]

I have a question about stairs and slabs. I'm making a birch tree mod, and I need to make stairs and slabs from it. Here is the code I used to add stairs and slabs:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

stairs.register_stair_and_slab("birch", "birch:wood",
        {cracky=3},
        {"birch_wood.png"},
        "Birch Wood stair",
        "Birch Wood slab")

But I get a run error. How do I fix?

The error is caused by a bug in the stable version of stairs. Copy the code in stars and change the prefix "Stairs:" to the prefix for your plugin.

Thanks 0gb.us! :D

[Evergreen]

Still get a ModError.

I stuck this code inside the same init.lua

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Code: Select all

stairs = {}

function birch.register_stair(subname, recipeitem, groups, images, description)
    minetest.register_node("stairs:stair_" .. subname, {
        description = description,
        drawtype = "nodebox",
        tiles = images,
        paramtype = "light",
        paramtype2 = "facedir",
        is_ground_content = true,
        groups = groups,
        node_box = {
            type = "fixed",
            fixed = {
                {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
                {-0.5, 0, 0, 0.5, 0.5, 0.5},
            },
        },
    })

    minetest.register_craft({
        output = 'stairs:stair_' .. subname .. ' 4',
        recipe = {
            {recipeitem, "", ""},
            {recipeitem, recipeitem, ""},
            {recipeitem, recipeitem, recipeitem},
        },
    })

    -- Flipped recipe for the silly minecrafters
    minetest.register_craft({
        output = 'stairs:stair_' .. subname .. ' 4',
        recipe = {
            {"", "", recipeitem},
            {"", recipeitem, recipeitem},
            {recipeitem, recipeitem, recipeitem},
        },
    })
end

-- Node will be called stairs:slab_<subname>
function birch.register_slab(subname, recipeitem, groups, images, description)
    minetest.register_node("stairs:slab_" .. subname, {
        description = description,
        drawtype = "nodebox",
        tiles = images,
        paramtype = "light",
        is_ground_content = true,
        groups = groups,
        node_box = {
            type = "fixed",
            fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
        },
        selection_box = {
            type = "fixed",
            fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
        },
        on_place = function(itemstack, placer, pointed_thing)
            if pointed_thing.type ~= "node" then
                return itemstack
            end

            -- If it's being placed on an another similar one, replace it with
            -- a full block
            local slabpos = nil
            local slabnode = nil
            local p0 = pointed_thing.under
            local p1 = pointed_thing.above
            local n0 = minetest.env:get_node(p0)
            if n0.name == "stairs:slab_" .. subname and
                    p0.y+1 == p1.y then
                slabpos = p0
                slabnode = n0
            end
            if slabpos then
                -- Remove the slab at slabpos
                minetest.env:remove_node(slabpos)
                -- Make a fake stack of a single item and try to place it
                local fakestack = ItemStack(recipeitem)
                pointed_thing.above = slabpos
                fakestack = minetest.item_place(fakestack, placer, pointed_thing)
                -- If the item was taken from the fake stack, decrement original
                if not fakestack or fakestack:is_empty() then
                    itemstack:take_item(1)
                -- Else put old node back
                else
                    minetest.env:set_node(slabpos, slabnode)
                end
                return itemstack
            end
           
            -- Otherwise place regularly
            return minetest.item_place(itemstack, placer, pointed_thing)
        end,
    })

    minetest.register_craft({
        output = 'stairs:slab_' .. subname .. ' 3',
        recipe = {
            {recipeitem, recipeitem, recipeitem},
        },
    })
end

-- Nodes will be called stairs:{stair,slab}_<subname>
function birch.register_stair_and_slab(subname, recipeitem, groups, images, desc_stair, desc_slab)
    birch.register_stair(subname, recipeitem, groups, images, desc_stair)
    birch.register_slab(subname, recipeitem, groups, images, desc_slab)
end

birch.register_stair_and_slab("birch", "birch:wood",
        {snappy=2,choppy=2,oddly_breakable_by_hand=2},
        {"birch_wood.png"},
        "Birch Wood stair",
        "Birch Wood slab")


What am I doing wrong?

[pandaro]

there a way(automatic) to update (refresh) an opened formspec?(without pressing buttons)

[stu]

Is there any way to catch when a player takes a hit, either from an entity or from another player?

Something like: entity.on_punch = function(self, puncher) ... but for players.

[Evergreen]

Still get a ModError.

I stuck this code inside the same init.lua

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

stairs = {}

function birch.register_stair(subname, recipeitem, groups, images, description)
    minetest.register_node("stairs:stair_" .. subname, {
        description = description,
        drawtype = "nodebox",
        tiles = images,
        paramtype = "light",
        paramtype2 = "facedir",
        is_ground_content = true,
        groups = groups,
        node_box = {
            type = "fixed",
            fixed = {
                {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
                {-0.5, 0, 0, 0.5, 0.5, 0.5},
            },
        },
    })

    minetest.register_craft({
        output = 'stairs:stair_' .. subname .. ' 4',
        recipe = {
            {recipeitem, "", ""},
            {recipeitem, recipeitem, ""},
            {recipeitem, recipeitem, recipeitem},
        },
    })

    -- Flipped recipe for the silly minecrafters
    minetest.register_craft({
        output = 'stairs:stair_' .. subname .. ' 4',
        recipe = {
            {"", "", recipeitem},
            {"", recipeitem, recipeitem},
            {recipeitem, recipeitem, recipeitem},
        },
    })
end

-- Node will be called stairs:slab_<subname>
function birch.register_slab(subname, recipeitem, groups, images, description)
    minetest.register_node("stairs:slab_" .. subname, {
        description = description,
        drawtype = "nodebox",
        tiles = images,
        paramtype = "light",
        is_ground_content = true,
        groups = groups,
        node_box = {
            type = "fixed",
            fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
        },
        selection_box = {
            type = "fixed",
            fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
        },
        on_place = function(itemstack, placer, pointed_thing)
            if pointed_thing.type ~= "node" then
                return itemstack
            end

            -- If it's being placed on an another similar one, replace it with
            -- a full block
            local slabpos = nil
            local slabnode = nil
            local p0 = pointed_thing.under
            local p1 = pointed_thing.above
            local n0 = minetest.env:get_node(p0)
            if n0.name == "stairs:slab_" .. subname and
                    p0.y+1 == p1.y then
                slabpos = p0
                slabnode = n0
            end
            if slabpos then
                -- Remove the slab at slabpos
                minetest.env:remove_node(slabpos)
                -- Make a fake stack of a single item and try to place it
                local fakestack = ItemStack(recipeitem)
                pointed_thing.above = slabpos
                fakestack = minetest.item_place(fakestack, placer, pointed_thing)
                -- If the item was taken from the fake stack, decrement original
                if not fakestack or fakestack:is_empty() then
                    itemstack:take_item(1)
                -- Else put old node back
                else
                    minetest.env:set_node(slabpos, slabnode)
                end
                return itemstack
            end
           
            -- Otherwise place regularly
            return minetest.item_place(itemstack, placer, pointed_thing)
        end,
    })

    minetest.register_craft({
        output = 'stairs:slab_' .. subname .. ' 3',
        recipe = {
            {recipeitem, recipeitem, recipeitem},
        },
    })
end

-- Nodes will be called stairs:{stair,slab}_<subname>
function birch.register_stair_and_slab(subname, recipeitem, groups, images, desc_stair, desc_slab)
    birch.register_stair(subname, recipeitem, groups, images, desc_stair)
    birch.register_slab(subname, recipeitem, groups, images, desc_slab)
end

birch.register_stair_and_slab("birch", "birch:wood",
        {snappy=2,choppy=2,oddly_breakable_by_hand=2},
        {"birch_wood.png"},
        "Birch Wood stair",
        "Birch Wood slab")


What am I doing wrong?

Nvm, I fixed it.

[Evergreen]

Now I have another question. Is the function math.random part of minetest?

[PilzAdam]

Now I have another question. Is the function math.random part of minetest?

No, its part of Lua.

[Evergreen]

Now I have another question. Is the function math.random part of minetest?

No, its part of Lua.

Thanks

[Evergreen]

I'm getting so close to finishing my birch tree mod. PilzAdam, I used your rubber.lua from your farming mod to generate the trees, make the sapling, leaves, and sapling growth.

Here is the tree growth that seems to cause a problem when I add it to the code.

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Code: Select all

llocal generate_birch_tree = function(pos)
    node = {name = ""}
    for dy=1,4 do
        pos.y = pos.y+dy
        if minetest.env:get_node(pos).name ~= "air" then
            return
        end
        pos.y = pos.y-dy
    end
    node.name = "birch:tree"
    for dy=0,4 do
        pos.y = pos.y+dy
        minetest.env:set_node(pos, node)
        pos.y = pos.y-dy
    end
   
    node.name = "birch:leaves"
    pos.y = pos.y+3
    for dx=-2,2 do
        for dz=-2,2 do
            for dy=0,3 do
                pos.x = pos.x+dx
                pos.y = pos.y+dy
                pos.z = pos.z+dz
               
                if dx == 0 and dz == 0 and dy==3 then
                    if minetest.env:get_node(pos).name == "air" and math.random(1, 5) <= 4 then
                        minetest.env:set_node(pos, node)
                    end
                elseif dx == 0 and dz == 0 and dy==4 then
                    if minetest.env:get_node(pos).name == "air" and math.random(1, 5) <= 4 then
                        minetest.env:set_node(pos, node)
                    end
                elseif math.abs(dx) ~= 2 and math.abs(dz) ~= 2 then
                    if minetest.env:get_node(pos).name == "air" then
                        minetest.env:set_node(pos, node)
                    end
                else
                    if math.abs(dx) ~= 2 or math.abs(dz) ~= 2 then
                        if minetest.env:get_node(pos).name == "air" and math.random(1, 5) <= 4 then
                            minetest.env:set_node(pos, node)
                        end
                    end
                end
               
                pos.x = pos.x-dx
                pos.y = pos.y-dy
                pos.z = pos.z-dz
            end
        end
    end
end

I get a ModError when I add this to the code. PS. The name of the mod is birch.

[Calinou]

Now I have another question. Is the function math.random part of minetest?

Minetest-related functions usually start with... "minetest". 8)

[0gb.us]

I'm getting so close to finishing my birch tree mod. PilzAdam, I used your rubber.lua from your farming mod to generate the trees, make the sapling, leaves, and sapling growth.

Here is the tree growth that seems to cause a problem when I add it to the code.

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

...

I get a ModError when I add this to the code. PS. The name of the mod is birch.

"a ModError" isn't very specific. What is the error?

[Evergreen]

I'm getting so close to finishing my birch tree mod. PilzAdam, I used your rubber.lua from your farming mod to generate the trees, make the sapling, leaves, and sapling growth.

Here is the tree growth that seems to cause a problem when I add it to the code.

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

...

I get a ModError when I add this to the code. PS. The name of the mod is birch.

"a ModError" isn't very specific. What is the error?

It says, "ModError: Failed to load and run /home/.minetest/mods/minetest/birch"

[VanessaE]

I might point out that More Trees already has birches.

[Evergreen]

I might point out that More Trees already has birches.

I know. Everyone and their brother has told me that already.

[Evergreen]

Whoops, nevermind, that was a stupid mistake. "llocal" XD

[Evergreen]

The saplings officially work!

[Evergreen]

The treegen is working! Now to figure out how to make them less rare...

[Evergreen]

I need to ask this question to PilzAdam, because he is the one who coded the tree generation.
Here is the code for the generation of birch trees.

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Code: Select all

minetest.register_on_generated(function(minp, maxp, blockseed)
    if math.random(1, 100) ~= 1 then
        return
    end
    local tmp = {x=(maxp.x-minp.x)/2+minp.x, y=(maxp.y-minp.y)/2+minp.y, z=(maxp.z-minp.z)/2+minp.z}
    local pos = minetest.env:find_node_near(tmp, maxp.x-minp.x, {"default:dirt_with_grass"})
    if pos ~= nil then
        generate_birch_tree({x=pos.x, y=pos.y+1, z=pos.z})
    end
end)

Please tell me how to make them less rare.

[Evergreen]

I tried changing the random, but that didn't seem to help.

[Casimir]

So, how do I get the position of an entity?

[pandaro]

! attention this is wrong!

type:
self:getpos()

! attention this is wrong!

[PilzAdam]

type:
self:getpos()

Nope, its:

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Code: Select all

self.object:getpos()

[Topywo]

I tried changing the random, but that didn't seem to help.

I think you must lower the 100. Just try changing it in 1 or 2 for a quick result.

Edit: teleport to an unloaded chunk or create a new world.