grenades/grenades.lua

local settings = minetest.settings

local regular = settings:get_bool("enable_regular_grenade")
local flash = settings:get_bool("enable_flashbang_grenade")
local smoke = settings:get_bool("enable_smoke_grenade")


-- Regular Grenade

if not regular or regular == true then
    grenades.register_grenade("regular", {
        description = "Regular grenade (Kills anyone near blast)",
        image = "grenades_regular.png",
        on_explode = function(pos, name)
            if not name or not pos then
                return
            end

            local player = minetest.get_player_by_name(name)

            local radius = 6

            minetest.add_particlespawner({
                amount = 20,
                time = 0.5,
                minpos = vector.subtract(pos, radius),
                maxpos = vector.add(pos, radius),
                minvel = {x = 0, y = 5, z = 0},
                maxvel = {x = 0, y = 7, z = 0},
                minacc = {x = 0, y = 1, z = 0},
                maxacc = {x = 0, y = 1, z = 0},
                minexptime = 0.3,
                maxexptime = 0.6,
                minsize = 7,
                maxsize = 10,
                collisiondetection = true,
                collision_removal = false,
                vertical = false,
                texture = "grenades_smoke.png",
            })

            minetest.sound_play("boom", {
                pos = pos,
                gain = 1.0,
                max_hear_distance = 32,
            })

            for k, v in ipairs(minetest.get_objects_inside_radius(pos, radius)) do
                if v:is_player() and v:get_hp() > 0 then
                    v:punch(player, 2, {damage_groups = {fleshy = 24 - (vector.distance(pos, v:get_pos()) * 2)}}, nil)
                end
            end
        end,
    })
end

-- Flashbang Grenade

if not flash or flash == true then
    grenades.register_grenade("flashbang", {
        description = "Flashbang grenade (Blinds all who look at blast)",
        image = "grenades_flashbang.png",
        on_explode = function(pos, name)
            for k, v in ipairs(minetest.get_objects_inside_radius(pos, 20)) do
                if v:is_player() and v:get_hp() > 0 then
                    local playerdir = vector.round(v:get_look_dir())
                    local grenadedir = vector.round(vector.direction(v:get_pos(), pos))
                    local pname = v:get_player_name()

                    minetest.sound_play("glasslike_break", {
                        pos = pos,
                        gain = 1.0,
                        max_hear_distance = 32,
                    })

                    if vector.equals(playerdir, grenadedir) then
                        for i = 0, 5, 1 do
                            local key = v:hud_add({
                                hud_elem_type = "image",
                                position = {x = 0, y = 0},
                                name = "flashbang hud "..pname,
                                scale = {x = -200, y = -200},
                                text = "grenades_white.png^[opacity:"..tostring(255 - (i * 13)),
                                alignment = {x = 0, y = 0},
                                offset = {x = 0, y = 0}
                            })

                            minetest.after(2 * i, function()
                                if minetest.get_player_by_name(pname) then
                                    minetest.get_player_by_name(pname):hud_remove(key)
                                end
                            end)
                        end
                    end

                end
            end
        end,
    })
end

-- Smoke Grenade

if not smoke or smoke == true then
    grenades.register_grenade("smoke", {
        description = "Smoke grenade (Generates smoke around blast site)",
        image = "grenades_smoke_grenade.png",
        on_explode = function(pos, name)

            minetest.sound_play("glasslike_break", {
                pos = pos,
                gain = 1.0,
                max_hear_distance = 32,
            })

            minetest.sound_play("hiss", {
                pos = pos,
                gain = 1.0,
                max_hear_distance = 32,
            })

            for i = 0, 5, 1 do
                minetest.add_particlespawner({
                    amount = 30,
                    time = 11,
                    minpos = vector.subtract(pos, 3),
                    maxpos = vector.add(pos, 3),
                    minvel = {x = 0, y = 2, z = 0},
                    maxvel = {x = 0, y = 3, z = 0},
                    minacc = {x = 1, y = 0.2, z = 1},
                    maxacc = {x = 1, y = 0.2, z = 1},
                    minexptime = 0.3,
                    maxexptime = 0.5,
                    minsize = 90,
                    maxsize = 100,
                    collisiondetection = false,
                    collision_removal = false,
                    vertical = false,
                    texture = "grenades_smoke.png",
                })
            end
        end,
        particle = {
            image = "grenades_smoke.png",
            life = 1,
            size = 4,
            glow = 0,
            interval = 5,
        }
    })
end

--
-- Crafts
--

if not settings:get_bool("enable_grenade_recipes") or settings:get_bool("enable_grenade_recipes") == true then

    -- Regular Grenade

    if not regular or regular == true then
        minetest.register_craft({
            type = "shaped",
            output = "grenades:grenade_regular",
            recipe = {
                {"", "default:steel_ingot", ""},
                {"default:steel_ingot", "default:coal_lump", "default:steel_ingot"},
                {"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"}
            },
        })
    end

    -- Smoke Grenade

    if not smoke or smoke == true then
        minetest.register_craft({
            type = "shaped",
            output = "grenades:grenade_smoke",
            recipe = {
                {"", "default:steel_ingot", ""},
                {"default:steel_ingot", "grenades:gun_powder", "default:steel_ingot"},
                {"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"}
            }
        })
    end

    --Flashbang Grenade

    if not flash or flash == true then
        minetest.register_craft({
            type = "shaped",
            output = "grenades:grenade_flashbang",
            recipe = {
                {"", "default:steel_ingot", ""},
                {"default:steel_ingot", "default:torch", "default:steel_ingot"},
                {"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"}
            },
        })
    end

    -- Other

    minetest.register_craftitem("grenades:gun_powder", {
        description = "A dark powder used for crafting some grenades",
        inventory_image = "grenades_gun_powder.png"
    })

    minetest.register_craft({
        type = "shapeless",
        output = "grenades:gun_powder",
        recipe = {"default:coal_lump", "default:coal_lump", "default:coal_lump", "default:coal_lump"},
    })
end