server-nalc/mods/bobblocks/trap.lua

-- State Changes

local update_bobtrap = function (pos, node)
    local nodename=""
    local param2=""
    --Switch Trap State
    if
    -- Swap Traps
               node.name == 'bobblocks:trap_spike' then nodename = 'bobblocks:trap_spike_set'
        elseif node.name == 'bobblocks:trap_spike_set' then nodename = 'bobblocks:trap_spike'
        elseif node.name == 'bobblocks:trap_spike_major' then nodename = 'bobblocks:trap_spike_major_set'
        elseif node.name == 'bobblocks:trap_spike_major_set' then nodename = 'bobblocks:trap_spike_major'
    end
    minetest.add_node(pos, {name = nodename})
end

-- Punch Traps
local on_bobtrap_punched = function (pos, node, puncher)
    if
       -- Start Traps
       node.name == 'bobblocks:trap_spike' or node.name == 'bobblocks:trap_spike_set'  or
       node.name == 'bobblocks:trap_spike_major' or node.name == 'bobblocks:trap_spike_major_set'
    then
        update_bobtrap(pos, node)
    end
end

minetest.register_on_punchnode(on_bobtrap_punched)


--ABM (Spring The Traps)

minetest.register_abm(
	{nodenames = {"bobblocks:trap_spike_set"},
    interval = 1.0,
    chance = 1,
    action = function(pos, node, active_object_count, active_object_count_wider)
    local objs = minetest.get_objects_inside_radius(pos, 1)
        for k, obj in pairs(objs) do

        update_bobtrap(pos, node)
    end
    end,

})

minetest.register_abm(
	{nodenames = {"bobblocks:trap_spike_major_set"},
    interval = 1.0,
    chance = 1,
    action = function(pos, node, active_object_count, active_object_count_wider)
    local objs = minetest.get_objects_inside_radius(pos, 1)
        for k, obj in pairs(objs) do

        update_bobtrap(pos, node)
    end
    end,

})




-- Nodes
minetest.register_node("bobblocks:trap_grass", {
	description = "Trap Grass",
    tiles = {"default_grass.png"},
	paramtype2 = "facedir",
	legacy_facedir_simple = true,
    groups = {snappy=2,cracky=3,oddly_breakable_by_hand=3},
    is_ground_content = false,
        walkable = false,
    climbable = false,
})

local function spikenode(name, desc, texture, drop, groups, drawtype)
minetest.register_node("bobblocks:trap_"..name, {
	description = desc,
    drawtype = drawtype,
	tiles = {"bobblocks_"..texture..".png"},
	inventory_image = ("bobblocks_"..texture..".png"),
    paramtype = "light",
    walkable = false,
	sunlight_propagates = true,
    groups = groups,
	drop = drop,
})
end

local function spike1(name, desc, texture)
spikenode(name, desc, texture, "bobblocks:trap_"..name, {cracky=3,melty=3}, "plantlike")
end

local function spike2(name, desc, texture, drop)
spikenode(name, desc, texture, drop, {cracky=3,melty=3,not_in_creative_inventory=1}, "raillike")
end

spike1("spike", "Trap Spike Minor", "minorspike")
spike2("spike_set", "Trap Spike Minor Set", "trap_set", 'bobblocks:trap_spike')
spike1("spike_major", "Trap Spike Major", "majorspike")
spike2("spike_major_set", "Trap Spike Major Set", "trap_set", 'bobblocks:trap_spike_major')

minetest.register_node("bobblocks:spike_major_reverse", {
	description = "Trap Spike Major Reverse",
    drawtype = "plantlike",
    visual_scale = 1,
	tiles = {"bobblocks_majorspike_reverse.png"},
	inventory_image = ("bobblocks_majorspike_reverse.png"),
    paramtype = "light",
    walkable = false,
	sunlight_propagates = true,
    groups = {cracky=2,melty=2},
})

-- Crafting

minetest.register_craft({
	output = 'bobblocks:trap_spike 3',
	recipe = {
		{'', 'default:obsidian_shard', ''},
		{'', 'default:steel_ingot', ''},
	}
})

minetest.register_craft({
	output = 'bobblocks:trap_spike_major',
	recipe = {
		{'default:obsidian_shard', 'default:obsidian_shard', 'default:obsidian_shard'},
		{'', 'default:steel_ingot', ''},
	}
})

minetest.register_craft({
	output = 'bobblocks:trap_grass',
	recipe = {
		{'', '', ''},
		{'', 'default:dirt', ''},
		{'', 'default:stick', ''},
	}
})

minetest.register_craft({
	output = 'bobblocks:spike_major_reverse',
	recipe = {
		{'', 'default:steel_ingot', ''},
		{'default:obsidian_shard', 'default:obsidian_shard', 'default:obsidian_shard'},
	}
})

-- ABM
minetest.register_abm(
	{nodenames = {"bobblocks:trap_spike"},
    interval = 1.0,
    chance = 1,
    action = function(pos, node, active_object_count, active_object_count_wider)
    local objs = minetest.get_objects_inside_radius(pos, 1)
        for k, obj in pairs(objs) do
        if obj:get_hp() > 0 then --MFF (crabman 8/1/2016) dont re-kill dead player
        	obj:set_hp(obj:get_hp()-1)
        end
        minetest.sound_play("bobblocks_trap_fall",
	    {pos = pos, gain = 1.0, max_hear_distance = 3,})
    end
    end,
})

minetest.register_abm(
	{nodenames = {"bobblocks:trap_spike_major"},
    interval = 1.0,
    chance = 1,
    action = function(pos, node, active_object_count, active_object_count_wider)
    local objs = minetest.get_objects_inside_radius(pos, 1)
        for k, obj in pairs(objs) do
        	if obj:get_hp() > 0 then --MFF (crabman 8/1/2016) dont re-kill dead player
	            obj:set_hp(obj:get_hp()-100)
    		end
        minetest.sound_play("bobblocks_trap_fall",
	    {pos = pos, gain = 1.0, max_hear_distance = 3,})
        end
    end,

})

minetest.register_abm(
	{nodenames = {"bobblocks:spike_major_reverse"},
	interval = 1.0,
	chance = 1,
	action = function(pos, node, active_object_count, active_object_count_wider)
		pos.y = pos.y-1.2
		local objs = minetest.get_objects_inside_radius(pos, 1)
		for k, obj in pairs(objs) do
			if obj:get_hp() > 0 then --MFF (crabman 8/1/2016) dont re-kill dead player
				obj:set_hp(obj:get_hp()-100)
			end
			minetest.sound_play("bobblocks_trap_fall",
			{pos = pos, gain = 1.0, max_hear_distance = 3,})
		end
	end,

})