climate_api/ca_effects/hud_overlay.lua
2020-05-12 16:00:24 +02:00

98 lines
3.0 KiB
Lua

--[[
# HUD Overlay Effect
Use this effect to display a fullscreen image as part of a player's HUD.
Expects a table as the parameter containing the following values:
- ``file <string>``: The name (including file ending) if the image to be displayed
- ``z_index <number>`` (optional): The z_index to forward to player.hud_add. Defaults to 1
- ``color_correction <bool>`` (optional): Whether the image should automatically darken based on current light. Defaults to false.
]]
if not climate_mod.settings.hud_overlay then return end
local EFFECT_NAME = "climate_api:hud_overlay"
local handles = {}
local function apply_hud(pname, weather, hud)
local player = minetest.get_player_by_name(pname)
if handles[pname] == nil then handles[pname] = {} end
if handles[pname][weather] ~= nil then
player:hud_remove(handles[pname][weather])
end
local file
if hud.color_correction then
local pos = vector.add(player:get_pos(), {x = 0, y = 1, z = 0})
local light = math.floor(math.max(minetest.env:get_node_light(pos) / 15, 0.2) * 256)
local shadow = 256 - light
local dark_file = hud.file .. "^[multiply:#000000ff^[opacity:" .. shadow
local light_file = hud.file .. "^[opacity:" .. light
file = "(" .. light_file .. ")^(" .. dark_file .. ")"
else
file = hud.file
end
local handle = player:hud_add({
name = weather,
hud_elem_type = "image",
position = {x = 0, y = 0},
alignment = {x = 1, y = 1},
scale = { x = -100, y = -100},
z_index = hud.z_index,
text = file,
offset = {x = 0, y = 0}
})
handles[pname][weather] = handle
end
local function remove_hud(pname, weather, hud)
if handles[pname] == nil or handles[pname][weather] == nil then return end
local handle = handles[pname][weather]
local player = minetest.get_player_by_name(pname)
player:hud_remove(handle)
handles[pname][weather] = nil
end
local function start_effect(player_data)
for playername, data in pairs(player_data) do
for weather, value in pairs(data) do
apply_hud(playername, weather, value)
end
end
end
local function handle_effect(player_data, prev_data)
for playername, data in pairs(player_data) do
for weather, value in pairs(data) do
if prev_data[playername][weather] == nil
or value.color_correction == true
or prev_data[playername][weather].color_correction == true
or value.file ~= prev_data[playername][weather].file
or value.z_index ~= prev_data[playername][weather].z_index
then
apply_hud(playername, weather, value)
end
end
end
for playername, data in pairs(prev_data) do
for weather, value in pairs(data) do
if player_data[playername][weather] == nil then
remove_hud(playername, weather, value)
end
end
end
end
local function stop_effect(prev_data)
for playername, data in pairs(prev_data) do
for weather, value in pairs(data) do
remove_hud(playername, weather, value)
end
end
end
climate_api.register_effect(EFFECT_NAME, start_effect, "start")
climate_api.register_effect(EFFECT_NAME, handle_effect, "tick")
climate_api.register_effect(EFFECT_NAME, stop_effect, "stop")