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cannon.lua
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cannon.lua
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-- vi: noexpandtab
--local has_digilines = minetest.get_modpath("digilines") and true
local has_pipeworks = minetest.get_modpath("pipeworks") and true
local cable_entry = "^technic_cable_connection_overlay.png"
local groups_base = {
cracky = 3,
oddly_breakable_by_hand = 3,
technic_machine = 1,
technic_hv = 1
}
local groups_rail = table.copy(groups_base)
if has_pipeworks then
groups_rail.tubedevice = 1
groups_rail.tubedevice_receiver = 1
end
local register_spacecannon = function(def)
local entity_texture = "energycube_" .. def.color .. ".png"
minetest.register_entity("spacecannon:energycube_" .. def.color, {
initial_properties = {
visual = "cube",
visual_size = {x=0.25, y=0.25},
textures = {
entity_texture,
entity_texture,
entity_texture,
entity_texture,
entity_texture,
entity_texture
},
collisionbox = {-0.25,-0.25,-0.25, 0.25,0.25,0.25},
physical = false
},
timer = 0,
lifetime = 0,
static_save = false,
penetrated = 0,
on_step = function(self, dtime)
self.timer = self.timer + dtime
self.lifetime = self.lifetime + dtime
if self.lifetime > def.timeout then
self.object:remove()
return
end
local pos = self.object:getpos()
if self.timer > 0.5 then
-- add sparks along the way
minetest.add_particlespawner({
amount = 5,
time = 0.5,
minpos = pos,
maxpos = pos,
minvel = {x = -2, y = -2, z = -2},
maxvel = {x = 2, y = 2, z = 2},
minacc = {x = -3, y = -3, z = -3},
maxacc = {x = 3, y = 3, z = 3},
minexptime = 1,
maxexptime = 2.5,
minsize = 0.5,
maxsize = 0.75,
texture = "spacecannon_spark.png",
glow = 5
})
self.timer = 0
end
local node = minetest.get_node(pos)
local node_def = minetest.registered_nodes[node.name]
local goes_through = not node_def.walkable
if goes_through then
local objs = minetest.get_objects_inside_radius({x=pos.x,y=pos.y,z=pos.z}, 1)
local collided = false
for _, obj in pairs(objs) do
if (obj:is_player() or (obj:get_luaentity() ~= nil
and obj:get_luaentity().name ~= self.name
and obj:get_luaentity().name ~= "__builtin:item"))
and spacecannon.can_damage(obj)
then
collided = true
obj:punch(self.object, 1.0, {
full_punch_interval=1.0,
damage_groups={fleshy=def.damage},
}, nil)
end
end
if collided then
spacecannon.destroy(pos, def.range, def.intensity)
self.penetrated = self.penetrated + 1
if self.penetrated >= def.penetration then
self.object:remove()
end
end
else
-- collision
spacecannon.destroy(pos, def.range, def.intensity)
self.penetrated = self.penetrated + 1
if self.penetrated >= def.penetration then
self.object:remove()
end
end
end
})
-- top, bottom
local textures = {
"cannon_blank.png" .. cable_entry,
"cannon_front_" .. def.color .. ".png",
"cannon_blank.png" .. cable_entry,
"cannon_blank.png" .. cable_entry,
"cannon_blank.png" .. cable_entry,
"cannon_blank.png" .. cable_entry
}
if def.textures then
textures = def.textures
end
local def_cannon = {
description = def.name .. " (" .. def.desc .. ")",
tiles = textures,
groups = def.is_th and groups_base or groups_rail,
is_ground_content = false,
drop = "spacecannon:cannon_" .. def.color,
sounds = default.node_sound_glass_defaults(),
paramtype2 = "facedir",
legacy_facedir_simple = true,
mesecons = {effector = {
action_on = function (pos)
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
spacecannon.fire(pos, owner, def.color, def.speed, def.is_th, def.storage_require_mod)
end
}},
connects_to = {"group:technic_hv_cable"},
connect_sides = {"bottom", "top", "left", "right", "front", "back"},
digiline = {
receptor = {
rules = spacecannon.digiline_rules,
action = function() end
},
effector = {
rules = spacecannon.digiline_rules,
action = spacecannon.digiline_effector
},
},
after_place_node = function(pos, placer)
local meta = minetest.get_meta(pos)
meta:set_string("owner", placer:get_player_name() or "")
if has_pipeworks then
pipeworks.after_place(pos)
end
end,
on_construct = function(pos)
local meta = minetest.get_meta(pos)
meta:set_int("powerstorage", 0)
meta:set_int("HV_EU_input", 0)
meta:set_int("HV_EU_demand", 0)
-- Set default digiline channel (do before updating formspec).
meta:set_string("channel", "spacecannon")
-- Set inventory (not used for thermal cannons)
if not def.is_th then
local inv = meta:get_inventory()
inv:set_size("src", 1)
end
spacecannon.update_formspec(meta, def.is_th)
end,
technic_run = function(pos)
local meta = minetest.get_meta(pos)
local eu_input = meta:get_int("HV_EU_input")
local demand = meta:get_int("HV_EU_demand")
local store = meta:get_int("powerstorage")
local config_store = spacecannon.config.ki_powerstorage * def.storage_require_mod
if def.is_th then config_store = spacecannon.config.th_powerstorage * def.storage_require_mod end
local config_require = spacecannon.config.ki_powerrequirement
if def.is_th then config_require = spacecannon.config.th_powerrequirement end
local infotext =
"Power: " .. eu_input .. "/" .. demand .. " " ..
"Store: " .. store .. "\n" ..
def.name .. ": " .. def.desc
meta:set_string("infotext", infotext)
if store < config_store then
-- charge
meta:set_int("HV_EU_demand", config_require)
meta:set_int("powerstorage", store + eu_input)
else
-- charged
meta:set_int("HV_EU_demand", 0)
end
end,
on_receive_fields = function(pos, _, fields, sender)
local playername = sender and sender:get_player_name() or ""
if minetest.is_protected(pos, playername) then
-- only allow protection-owner to fire and configure
return
end
local meta = minetest.get_meta(pos)
if fields.fire then
spacecannon.fire(pos, playername, def.color, def.speed, def.is_th, def.storage_require_mod)
end
if fields.set_digiline_channel and fields.digiline_channel then
meta:set_string("channel", fields.digiline_channel)
end
spacecannon.update_formspec(meta, def.is_th)
end,
after_dig_node = function(pos, _node, meta, _digger)
if meta.inventory and meta.inventory.src and meta.inventory.src[1] then
minetest.add_item(pos, ItemStack(meta.inventory.src[1]))
end
if has_pipeworks then
pipeworks.after_dig(pos)
end
end
}
if has_pipeworks and not def.is_th then
def_cannon.tube = {
insert_object = function(pos, _, stack)
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
return inv:add_item("src", stack)
end,
can_insert = function(pos, _, stack)
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
stack = stack:peek_item(1)
return inv:room_for_item("src", stack)
end,
input_inventory = "src",
connect_sides = {
left = 1, back = 1, top = 1,
right = 1, front = 1, bottom = nil
}
}
end
minetest.register_node("spacecannon:cannon_" .. def.color, def_cannon)
technic.register_machine("HV", "spacecannon:cannon_" .. def.color, technic.receiver)
minetest.register_craft({
output = 'spacecannon:cannon_' .. def.color,
recipe = {
{'', 'default:steelblock', ''},
{ def.ingredient, def.ingredient, def.ingredient},
{'', 'default:steelblock', ''}
}
})
end
register_spacecannon({
color = "green",
name = "Ion cannon",
desc = "fast, low damage",
is_th = true,
range = 1,
storage_require_mod = 1,
damage = 5,
intensity = 1,
timeout = 8,
speed = 10,
penetration = 0,
ingredient = "default:mese_block"
})
register_spacecannon({
color = "yellow",
name = "Plasma cannon",
desc = "medium speed, medium damage",
is_th = true,
range = 3,
storage_require_mod = 3,
intensity = 2,
damage = 8,
timeout = 8,
speed = 5,
penetration = 0,
ingredient = "spacecannon:cannon_green"
})
register_spacecannon({
color = "red",
name = "Nova cannon",
desc = "slow, heavy damage",
is_th = true,
range = 5,
storage_require_mod = 5,
intensity = 4,
damage = 10,
timeout = 15,
speed = 3,
penetration = 0,
ingredient = "spacecannon:cannon_yellow"
})
-- Railguns
-- Regular railgun
register_spacecannon({
color = "blue",
name = "Railgun cannon",
desc = "fast, 2x penetrating damage",
textures = {
"railgun_blank.png" .. cable_entry,
"railgun_front.png",
"railgun_blank.png" .. cable_entry,
"railgun_blank.png" .. cable_entry,
"railgun_top_bottom.png",
"railgun_top_bottom.png",
},
is_th = false,
range = 0,
storage_require_mod = 1,
intensity = 2,
damage = 6,
timeout = 10,
speed = 9,
penetration = 2,
ingredient = "technic:copper_coil"
})
-- Helical railgun
register_spacecannon({
color = "purple",
name = "Helical railgun cannon",
desc = "fast, 4x penetrating damage",
textures = {
"railgun_blank.png" .. cable_entry,
"helical_railgun_front.png",
"railgun_blank.png" .. cable_entry,
"railgun_blank.png" .. cable_entry,
"helical_railgun_top_bottom.png",
"helical_railgun_top_bottom.png",
},
is_th = false,
range = 0,
storage_require_mod = 1.5,
intensity = 4,
damage = 6,
timeout = 15,
speed = 10,
penetration = 4,
ingredient = "spacecannon:cannon_blue"
})