climate_api/lib/player_physics.lua
2020-05-16 05:28:31 +02:00

87 lines
2.7 KiB
Lua

local mod_player_monoids = minetest.get_modpath("player_monoids") ~= nil
local mod_playerphysics = minetest.get_modpath("playerphysics") ~= nil
local mod_pova = minetest.get_modpath("pova") ~= nil
local physics = {}
-- use player monoids if available
if mod_player_monoids then
function physics.add(id, player, effect, value)
player_monoids[effect]:add_change(player, value, id)
end
function physics.remove(id, player, effect)
player_monoids[effect]:del_change(player, id)
end
-- fallback to playerphysics if available
elseif mod_playerphysics then
function physics.add(id, player, effect, value)
playerphysics.add_physics_factor(player, effect, id, value)
end
function physics.remove(id, player, effect)
playerphysics.remove_physics_factor(player, effect, id)
end
-- fallback to pova if available
-- pova uses additive effect modifiers
-- this tries to simulate multiplication
-- by including the default value in modifier calculation
elseif mod_pova then
function physics.add(id, player, effect, value)
local playername = player:get_player_name()
local defaults = pova.get_override(playername, "default")
local default
if defaults == nil or defaults[effect] == nil then default = 1
else default = defaults[effect] end
local override = {}
override[effect] = (value * default) - default
pova.add_override(playername, id, override)
pova.do_override(player)
end
function physics.remove(id, player, effect)
local playername = player:get_player_name()
pova.del_override(playername, id)
pova.do_override(player)
end
-- fallback to vanilla override as last resort
else
local function apply_physics(player)
local playername = player:get_player_name()
local override = { speed = 1, jump = 1, gravity = 1 }
for effect, modifiers in pairs(physics[playername]) do
override[effect] = 1
for _, modifier in pairs(modifiers) do
override[effect] = override[effect] * modifier
end
end
player:set_physics_override(override)
end
function physics.add(id, player, effect, value)
local playername = player:get_player_name()
if physics[playername] == nil then physics[playername] = {} end
if physics[playername][effect] == nil then physics[playername][effect] = {} end
physics[playername][effect][id] = value
apply_physics(player)
end
function physics.remove(id, player, effect)
local playername = player:get_player_name()
if physics[playername] == nil then return end
if physics[playername][effect] == nil then return end
if physics[playername][effect][id] == nil then return end
physics[playername][effect][id] = nil
apply_physics(player)
end
minetest.register_on_leaveplayer(function(player)
local playername = player:get_player_name()
physics[playername] = nil
end)
end
return physics