nssm/darts.lua

local function duck_explosion(pos)
	if minetest.is_protected(pos, "") then
		return
	end
	pos.y = pos.y+1;
	minetest.add_particlespawner({
		amount = 10,
		time = 0.2,
		minpos = {x=pos.x-1, y=pos.y-1, z=pos.z-1},
		maxpos = {x=pos.x+1, y=pos.y+4, z=pos.z+1},
		minvel = {x=0, y=0, z=0},
		maxvel = {x=1, y=1, z=1},
		minacc = {x=-0.5,y=5,z=-0.5},
		maxacc = {x=0.5,y=5,z=0.5},
		minexptime = 1,
		maxexptime = 3,
		minsize = 4,
		maxsize = 6,
		collisiondetection = false,
		vertical = false,
		texture = "duck_egg_fragments.png",
	})
	core.after(0.4, function()
		for dx = -1,1 do
			pos = {x = pos.x+dx, y=pos.y; z=pos.z+dx}
			minetest.add_particlespawner({
				amount = 100,
				time = 0.2,
				minpos = {x=pos.x-1, y=pos.y-1, z=pos.z-1},
				maxpos = {x=pos.x+1, y=pos.y+4, z=pos.z+1},
				minvel = {x=0, y=0, z=0},
				maxvel = {x=1, y=5, z=1},
				minacc = {x=-0.5,y=5,z=-0.5},
				maxacc = {x=0.5,y=5,z=0.5},
				minexptime = 1,
				maxexptime = 3,
				minsize = 2,
				maxsize = 4,
				collisiondetection = false,
				vertical = false,
				texture = "tnt_smoke.png",
			})
			minetest.add_entity(pos, "nssm:duck")
		end
	end)
end

-- arrow (duck_arrow)
mobs:register_arrow("nssm:duck_father", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"duck_egg.png"},
	velocity = 8,
	-- direct hit
	hit_player = function(self, player)
		local pos = self.object:get_pos()
		duck_explosion(pos)
	end,

	hit_mob = function(self, player)
		local pos = self.object:get_pos()
		duck_explosion(pos)
	end,

	hit_node = function(self, pos, node)
		duck_explosion(pos)
	end,
})


local function ice_explosion(pos)
	for i=pos.x-math.random(0, 1), pos.x+math.random(0, 1), 1 do
		for j=pos.y-1, pos.y+4, 1 do
			for k=pos.z-math.random(0, 1), pos.z+math.random(0, 1), 1 do
				local p = {x=i, y=j, z=k}
				local n = minetest.get_node(p).name
				if minetest.get_item_group(n, "unbreakable") == 1
				or minetest.is_protected(p, "")
				or (n == "bones:bones" and not nssm:affectbones(self)) then
				else
					minetest.set_node({x=i, y=j, z=k}, {name="default:ice"})
				end
			end
		end
	end
end

-- snow_arrow
mobs:register_arrow("nssm:snow_arrow", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"transparent.png"},
	velocity =20,
	-- direct hit
	hit_player = function(self, player)
		local pos = self.object:get_pos()
		ice_explosion(pos)
	end,

	hit_mob = function(self, player)
		local pos = self.object:get_pos()
		ice_explosion(pos)
	end,
	hit_node = function(self, pos, node)
		ice_explosion(pos)
	end,
})


-- arrow manticore
mobs:register_arrow("nssm:spine", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"manticore_spine_flying.png"},
	velocity = 10,
	-- direct hit
	hit_player = function(self, player)
		player:punch(self.object, 1.0, {
			full_punch_interval = 1.0,
			damage_groups = {fleshy = 2},
		}, nil)
	end,

	hit_mob = function(self, player)
		player:punch(self.object, 1.0, {
			full_punch_interval = 1.0,
			damage_groups = {fleshy = 2},
		}, nil)
	end,
})


--morbat arrow
mobs:register_arrow("nssm:morarrow", {
	visual = "sprite",
	visual_size = {x=0.5, y=0.5},
	textures = {"morarrow.png"},
	velocity= 13,

	hit_player = function(self, player)
		player:punch(self.object, 1.0, {
			full_punch_interval = 1.0,
			damage_groups = {fleshy = 3},
		}, nil)
	end,
})


local function explosion_web(pos)
	pos.y = round(pos.y)
	if minetest.is_protected(pos, "") then
		return
	end
	for i=pos.x-1, pos.x+1, 1 do
		for j=pos.y-3, pos.y, 1 do
			for k=pos.z-1, pos.z+1, 1 do
				local p = {x=i,y=j,z=k}
				local k = {x=i,y=j+1,z=k}
				local current = minetest.get_node(p).name
				local ontop  = minetest.get_node(k).name
				if 	(current ~= "air") and
					(current ~= "nssm:web") and
					(ontop == "air") and not
					minetest.is_protected(p,"") and not
					minetest.is_protected(k,"") then
						minetest.set_node(k, {name="nssm:web"})
				end
			end
		end
	end
end


-- web arrow
mobs:register_arrow("nssm:webball", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"web_ball.png"},
	velocity = 8,
	-- direct hit
	hit_player = function(self, player)
		local p = player:get_pos()
		explosion_web(p)
	end,

	hit_mob = function(self, player)
		player:punch(self.object, 1.0, {
			full_punch_interval = 1.0,
			damage_groups = {fleshy = 1},
		}, nil)
	end,

	hit_node = function(self, pos, node)
		explosion_web(pos)
	end
})


function explosion_thickweb(pos)
	pos.y = round(pos.y)
	if minetest.is_protected(pos, "") then
		return
	end
	for i=pos.x+0, pos.x+0, 1 do
		for j=pos.y-2, pos.y, 1 do
			for k=pos.z+0, pos.z+0, 1 do
				local p = {x=i,y=j,z=k}
				local k = {x=i,y=j+1,z=k}
				local current = minetest.get_node(p).name
				local ontop  = minetest.get_node(k).name
				if 	(current ~= "air") and
					(current ~= "nssm:thick_web") and
					(ontop == "air") and not
					minetest.is_protected(p,"") and not
					minetest.is_protected(k,"") then
						minetest.set_node(k, {name="nssm:thick_web"})
				end
			end
		end
	end
end

-- thick_web arrow
mobs:register_arrow("nssm:thickwebball", {
	visual = "sprite",
	visual_size = {x = 2, y = 2},
	textures = {"thick_web_ball.png"},
	velocity = 8,
	-- direct hit
	hit_player = function(self, player)
		local p = player:get_pos()
		explosion_thickweb(p)
	end,

	hit_mob = function(self, player)
		player:punch(self.object, 1.0, {
			full_punch_interval = 1.0,
			damage_groups = {fleshy = 6},
		}, nil)
	end,

	hit_node = function(self, pos, node)
		explosion_thickweb(pos)
	end
})


-- arrow=>phoenix arrow
mobs:register_arrow("nssm:phoenix_arrow", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"transparent.png"},
	velocity = 8,
	-- direct hit
	hit_player = function(self, player)
	end,

	on_step = function(self, dtime)

		local pos = self.object:get_pos()
		if minetest.is_protected(pos, "") then
			return
		end

		local n = minetest.get_node(pos).name

		if self.timer == 0 then
			self.timer = os.time()
		end

		if os.time() - self.timer > 5 or minetest.is_protected(pos, "")
		or ((n~="air") and (n~="nssm:phoenix_fire")) then
			self.object:remove()
		end

		if math.random(1,2)==2 then
			minetest.set_node(pos, {name="nssm:phoenix_fire"})
		end

		if math.random(1,6)==1 then
			dx = math.random(-1,1)
			dy = math.random(-1,1)
			dz = math.random(-1,1)
			local p = {x=pos.x+dx, y=pos.y+dy, z=pos.z+dz}
			local n = minetest.get_node(p).name
			if n=="air" then
				minetest.set_node(p, {name="nssm:phoenix_fire"})
			end
		end

	end,
})


function gas_explosion(pos)
	if minetest.is_protected(pos, "") then
		return
	end
	for dx=-2,2 do
		for dy=-1,4 do
			for dz=-2,2 do
				local p = {x=pos.x+dx, y=pos.y+dy, z=pos.z+dz}
				if minetest.is_protected(p, "") then
					return
				end
				local n = minetest.get_node(p).name
				if n== "air" then
					minetest.set_node(p, {name="nssm:venomous_gas"})
				end
			end
		end
	end
end

mobs:register_arrow("nssm:super_gas", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"transparent.png"},
	velocity = 8,
	-- direct hit
	hit_player = function(self, player)
		local p = player:get_pos()
		gas_explosion(p)
	end,

	hit_node = function(self, pos, node)
		gas_explosion(pos)
	end
})


mobs:register_arrow("nssm:roar_of_the_dragon", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"transparent.png"},
	velocity = 10,

	on_step = function(self, dtime)

		local pos = self.object:get_pos()

		local n = minetest.get_node(pos).name

		if self.timer == 0 then
			self.timer = os.time()
		end

		if os.time() - self.timer > 8 or minetest.is_protected(pos, "") then
			self.object:remove()
		end

		local objects = minetest.get_objects_inside_radius(pos, 1)
		for _,obj in ipairs(objects) do
			local name = obj:get_entity_name()
			if name~="nssm:roar_of_the_dragon" and name ~= "nssm:mese_dragon" then
				obj:set_hp(obj:get_hp()-0.05)
				if (obj:get_hp() <= 0) then
					if (not obj:is_player())
					and name ~= self.object:get_luaentity().name then
						obj:remove()
					end
				end
			end
		end

		minetest.set_node(pos, {name="air"})
		if math.random(1,2)==1 then
			dx = math.random(-1,1)
			dy = math.random(-1,1)
			dz = math.random(-1,1)
			if minetest.is_protected(p, "") then
				return
			end
			local p = {x=pos.x+dx, y=pos.y+dy, z=pos.z+dz}
			minetest.set_node(p, {name="air"})
		end
	end
})


mobs:register_arrow("nssm:lava_arrow", {
	visual = "sprite",
	visual_size = {x = 1, y = 1},
	textures = {"transparent.png"},
	velocity = 10,
	-- direct hit
	hit_player = function(self, player)
		local pos = self.object:get_pos()
		if minetest.is_protected(pos, "") then
			return
		end
		for dy=-1, 6, 1 do
			for dx=-1, 1, 2 do
				for dz=-1, 1, 2 do
					local p = {x=pos.x+dx, y=pos.y+dy, z=pos.z+dz}
					local n = minetest.get_node(p).name
					if n~="default:lava_flowing"
					and not minetest.is_protected(p, "") then
						minetest.set_node(p, {name="default:lava_flowing"})
					end
				end
			end
		end
	end,
})