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RedMew/map_gen/shared/hail_hydra.lua
2020-08-09 22:12:38 -04:00

214 lines
6.3 KiB
Lua

-- Cut off a limb, and two more shall take its place!
local Event = require 'utils.event'
local CreateParticles = require 'features.create_particles'
local Token = require 'utils.token'
local Global = require 'utils.global'
local table = require 'utils.table'
local random = math.random
local floor = math.floor
local ceil = math.ceil
local pairs = pairs
local type = type
local clear_table = table.clear_table
local compound = defines.command.compound
local logical_or = defines.compound_command.logical_or
local attack = defines.command.attack
local attack_area = defines.command.attack_area
local hail_hydra_conf = global.config.hail_hydra
local spawn_table = {}
for k, v in pairs(global.config.hail_hydra.hydras) do
spawn_table[k] = v
end
local function formula(evo)
evo = evo * 100
local value = (0.00003 * evo ^ 3 + 0.004 * evo ^ 2 + 0.3 * evo) * 0.01
return value <= 1 and value or 1
end
local primitives = {
evolution_scale = (hail_hydra_conf.evolution_scale ~= nil) and hail_hydra_conf.evolution_scale or 1,
online_player_scale_enabled = hail_hydra_conf.online_player_scale_enabled,
online_player_scale = hail_hydra_conf.online_player_scale,
enabled = nil
}
Global.register(
{
primitives = primitives,
spawn_table = spawn_table
},
function(tbl)
primitives = tbl.primitives
spawn_table = tbl.spawn_table
end
)
local Public = {}
local function backwards_compatibility(amount)
return {min = amount, max = amount + primitives.evolution_scale}
end
local function create_attack_command(position, target)
local command = {type = attack_area, destination = position, radius = 10}
if target then
command = {
type = compound,
structure_type = logical_or,
commands = {
{type = attack, target = target},
command
}
}
end
return command
end
local on_died =
Token.register(
function(event)
local entity = event.entity
local name = entity.name
local hydra = spawn_table[name]
if not hydra then
return
end
local position = entity.position
local force = entity.force
local num_online_players = #game.connected_players
local player_scale = 0
if primitives.online_player_scale_enabled then
player_scale = (num_online_players - primitives.online_player_scale) * 0.01
end
local evolution_scaled = formula(force.evolution_factor)
local evolution_factor = evolution_scaled + evolution_scaled * player_scale
local cause = event.cause
local surface = entity.surface
local create_entity = surface.create_entity
local create_particle = surface.create_particle
local find_non_colliding_position = surface.find_non_colliding_position
local command = create_attack_command(position, cause)
for hydra_spawn, amount in pairs(hydra) do
if (type(amount) == 'number') then
amount = backwards_compatibility(amount)
end
local trigger = amount.trigger
if trigger == nil or trigger < force.evolution_factor then
if amount.locked then
evolution_factor = evolution_scaled
end
local min = amount.min
local max = amount.max
max = (max ~= nil and max >= min) and max or min
if max ~= min then
amount = (max - min) * (evolution_factor / formula(1)) + min
else
amount = min
end
else
amount = 0
end
amount = (amount > 0) and amount or 0
local extra_chance = amount % 1
if extra_chance > 0 then
if random() <= extra_chance then
amount = ceil(amount)
else
amount = floor(amount)
end
end
local particle_count
if amount > 4 then
particle_count = 60
else
particle_count = amount * 15
end
CreateParticles.blood_explosion(create_particle, particle_count, position)
for _ = amount, 1, -1 do
position = find_non_colliding_position(hydra_spawn, position, 2, 0.4) or position
local spawned = create_entity({name = hydra_spawn, force = force, position = position})
if spawned and spawned.type == 'unit' then
spawned.set_command(command)
elseif spawned and cause and cause.valid and cause.force and cause.type ~= "car" then
spawned.shooting_target = cause
end
end
end
end
)
local function register_event()
if not primitives.enabled then
Event.add_removable(defines.events.on_entity_died, on_died)
primitives.enabled = true
end
end
--- Enables hail_hydra
function Public.enable_hail_hydra()
register_event()
end
--- Disables hail_hydra
function Public.disable_hail_hydra()
if primitives.enabled then
Event.remove_removable(defines.events.on_entity_died, on_died)
primitives.enabled = nil
end
end
--- Sets the evolution scale
-- @param scale <number>
function Public.set_evolution_scale(scale)
primitives.evolution_scale = scale
end
--- Sets the online player scale
-- @param scale <number>
function Public.set_evolution_scale(scale)
primitives.online_player_scale = scale
end
--- Toggles the online player scale feature
-- @param enable <boolean>
function Public.set_evolution_scale(enabled)
primitives.online_player_scale_enabled = enabled
end
--- Sets the hydra spawning table
-- @param hydras <table> see config.lua's hail_hydra section for example
function Public.set_hydras(hydras)
clear_table(spawn_table)
for k, v in pairs(hydras) do
spawn_table[k] = v
end
end
--- Adds to/overwrites parts of the hydra spawning table
-- @param hydras <table> see config.lua's hail_hydra section for example
function Public.add_hydras(hydras)
for k, v in pairs(hydras) do
spawn_table[k] = v
end
end
if global.config.hail_hydra.enabled then
register_event()
end
return Public