commit b45f31a6c2b60f887c76a08e525c4fc6cf085826
Author: Cédric Ronvel <cedric.ronvel@cloud-solutions.fr>
Date:   Wed Sep 2 16:04:41 2020 +0200

    initial publish

diff --git a/README.md b/README.md
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+
+# Astral
+
+This mod adds regular moon phases, as well as 9 special natural and surnatural Astral events to discover!
+
+
+
+## API
+
+* `astral.get_moonth()` return moonth, moonth_name
+  This returns the *moonth* (not month!) number, from 1 to 12, and its user-friendly name.
+* `astral.get_moon_phase()` return moon_phase, moon_phase_name
+  This returns the moon phase (number, from 0: new moon, to 7: waning crescent moon), and its user-friendly name.
+* `astral.get_astral_event()` return astral_event, astral_event_name
+  If there is a special astral event in progress, it returns that astral event code, otherwise it returns "none".
+  The second returned argument is the user-friendly name for that event.
+  For 3rd party games, it would allow one to produce some (magical?) effects depending on astral events.
+
diff --git a/astral.lua b/astral.lua
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+++ b/astral.lua
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+
+local mod_storage = minetest.get_mod_storage()
+
+-- Data
+local moon_phase_count = 8
+local moon_phase = 1
+local special_moon = "normal"
+local special_sun = "normal"
+local special_moonth = "normal"
+local moon_texture = "moon-0.png"
+local moon_visible = true
+local moon_scale = 0.8
+
+local sun_texture = "sun.png"
+local sun_scale = 3
+
+local astral_day_offset = mod_storage:get_int( "astral_day_offset" )
+if astral_day_offset == 0 then
+	-- First time loading the mod, init it
+	astral_day_offset = math.random( 1 , 10000 )
+end
+
+
+
+local moon_phase_name = {
+	[0] = "New Moon" ,
+	"Waxing Crescent" ,
+	"First Quarter" ,
+	"Waxing Gibbous" ,
+	"Full Moon" ,
+	"Waning Gibbous" ,
+	"Last Quarter" ,
+	"Waning Crescent"
+}
+
+local moonth_cycle = {
+	{ special = "normal" , name = "Wolf Moonth" } ,
+	{ special = "black_moon" , name = "Crow Moonth" } ,
+	{ special = "rainbow_sun" , name = "Ouroboros Moonth" } ,
+	{ special = "blue_moon" , name = "Whisper Moonth" } ,
+	{ special = "normal" , name = "Patience Moonth" } ,	-- or perseverance?
+	{ special = "white_moon" , name = "Unicorn Moonth" } ,
+	{ special = "crescent_sun" , name = "Wedding Moonth" } ,
+	{ special = "blood_moon" , name = "Phoenix Moonth" } ,
+	{ special = "normal" , name = "Child Moonth" } ,
+	{ special = "golden_moon" , name = "Golden Moonth" } ,
+	{ special = "ring_sun" , name = "Emerald Moonth" } ,
+	{ special = "super_moon" , name = "World Moonth" } ,
+}
+
+
+
+local special_moon_config = {
+	blood_moon = {
+		name = "Blood Moon",
+		at_phase = 4,
+		texture = "blood-moon.png",
+		scale = 2,
+		sky_color = "#a74ddfff",
+		horizon_color = "#ff44aaff",
+		star_color = "#ffcbcb70" ,
+	} ,
+	blue_moon = {
+		name = "Blue Moon",
+		at_phase = 4,
+		texture = "blue-moon.png",
+		scale = 2,
+		sky_color = "#57ff9dff",
+		horizon_color = "#73ffccff" ,
+		star_color = "#b0cccc70" ,
+	} ,
+	white_moon = {
+		name = "White Moon",
+		at_phase = 4,
+		texture = "white-moon.png",
+		scale = 2.5,
+		sky_color = "#579dffff",
+		horizon_color = "#73aeffff" ,
+	} ,
+	black_moon = {
+		name = "Black Moon",
+		at_phase = 0,
+		texture = "black-moon.png",
+		scale = 2.8,
+		sky_color = "#579dffff",
+		horizon_color = "#73aeffff" ,
+	} ,
+	golden_moon = {
+		name = "Golden Crescent",
+		at_phase = 1,
+		texture = "golden-moon.png",
+		scale = 2.2,
+		sky_color = "#9d57ffff",
+		horizon_color = "#ae73ffff" ,
+		star_color = "#ffff9088" ,
+	} ,
+	super_moon = {
+		name = "Super Moon",
+		at_phase = 4,
+		texture = "super-moon.png",
+		scale = 5,
+		sky_color = "#579dffff",
+		horizon_color = "#73aeffff"
+	} ,
+	crescent_sun = {
+		name = "Crescent Sun",
+		at_phase = 0,
+		at_phase2 = 1,
+		no_astral_event = true,
+		not_visible = true,
+		texture = "moon-0.png",
+		sky_color = "#579dffff",
+		horizon_color = "#73aeffff" ,
+	} ,
+	ring_sun = {
+		name = "Ring Sun",
+		at_phase = 0,
+		at_phase2 = 1,
+		no_astral_event = true,
+		not_visible = true,
+		texture = "moon-0.png",
+		sky_color = "#579dffff",
+		horizon_color = "#73aeffff" ,
+	} ,
+}
+
+
+
+local special_sun_config = {
+	rainbow_sun = {
+		name = "Rainbow Sun",
+		at_phase = 6,
+		texture = "rainbow-sun.png",
+		scale = 5,
+	} ,
+	crescent_sun = {
+		name = "Crescent Sun",
+		at_phase = 0,
+		texture = "crescent-sun.png",
+		scale = 3,
+		sky_color = "#549aaa",
+		horizon_color = "#5a90a0",
+	} ,
+	ring_sun = {
+		name = "Ring Sun",
+		at_phase = 0,
+		texture = "ring-sun.png",
+		scale = 3,
+		sky_color = "#546a6a",
+		horizon_color = "#5a6868",
+	} ,
+}
+
+
+
+local moon_phase_sky_color = {
+	"#000000ff",
+	"#1d293aff",
+	"#1c4b8dff",
+	"#206affff",
+	"#579dffff",
+	"#206affff",
+	"#1c4b8dff",
+	"#1d293aff",
+}
+
+local moon_phase_horizon_color = {
+	"#000000ff",
+	"#243347ff",
+	"#235fb3ff",
+	"#4090ffff",
+	"#73aeffff",
+	"#4090ff",
+	"#3079dfff",
+	"#173154ff",
+}
+
+local normal_star_color = "#ebebff69"
+local star_color = normal_star_color
+
+local normal_cloud_density = 0.4
+local cloud_density = normal_cloud_density
+
+local normal_night_sky_color = "#006aff"
+local normal_night_horizon_color = "#4090ff"
+local night_sky_color = moon_phase_sky_color[ 0 ]
+local night_horizon_color = moon_phase_horizon_color[ 0 ]
+local normal_moon_scale = 0.8
+
+local normal_day_sky_color = "#8cbafa"
+local normal_day_horizon_color = "#9bc1f0"
+local day_sky_color = normal_day_sky_color
+local day_horizon_color = normal_day_horizon_color
+local normal_sun_scale = 3
+
+local moon_day = nil
+local sun_day = nil
+local astral_event = "none"
+local astral_event_name = "none"
+local moonth = 1
+
+
+
+local function compute_moon()
+	local old_moon_day = moon_day
+	moon_day = minetest.get_day_count() + astral_day_offset
+	
+	-- For the moon, changed at the middle of the day to avoid glitches
+	if minetest.get_timeofday() > 0.5 then
+		moon_day = moon_day + 1
+	end
+	
+	-- Nothing changed?
+	if old_moon_day == moon_day then
+		return false
+	end
+
+	moon_visible = true
+	
+	moon_phase = moon_day % moon_phase_count
+
+	local cycle_count = math.floor( moon_day / moon_phase_count )
+	moonth = 1 + cycle_count % #moonth_cycle
+	special_moonth = moonth_cycle[ moonth ].special
+
+	local config = special_moon_config[ special_moonth ]
+	
+	if
+		special_moonth == "normal"
+		or not config
+		or ( config.at_phase ~= moon_phase and config.at_phase2 ~= moon_phase )
+	then
+		special_moon = "normal"
+		moon_texture = "moon-" .. moon_phase .. ".png"
+		moon_scale = normal_moon_scale
+		night_sky_color = moon_phase_sky_color[ 1 + moon_phase ]
+		night_horizon_color = moon_phase_horizon_color[ 1 + moon_phase ]
+
+		-- Only the moon can change stars and clouds
+		star_color = normal_star_color
+		cloud_density = normal_cloud_density
+
+		return true
+	end
+	
+	special_moon = special_moonth
+	moon_texture = config.texture
+	if config.not_visible then moon_visible = false end
+	moon_scale = config.scale
+	night_sky_color = config.sky_color
+	night_horizon_color = config.horizon_color
+	
+	-- Only the moon can change stars and clouds
+	star_color = config.star_color or normal_star_color
+	cloud_density = 0.2
+	
+	return true
+end
+
+
+
+local function compute_sun()
+	local old_sun_day = sun_day
+	sun_day = minetest.get_day_count() + astral_day_offset
+	
+	--if minetest.get_timeofday() > 0.25 then sun_day = sun_day + 1 end
+	
+	-- Nothing changed?
+	if old_sun_day == sun_day then
+		return false
+	end
+
+	-- Fake (local) moon_phase
+	local moon_phase = sun_day % moon_phase_count
+
+	local cycle_count = math.floor( sun_day / moon_phase_count )
+	
+	-- Fake (local) moonth and special_moonth
+	local moonth = 1 + cycle_count % #moonth_cycle
+	local special_moonth = moonth_cycle[ moonth ].special
+	
+	local config = special_sun_config[ special_moonth ]
+	
+	if
+		special_moonth == "normal"
+		or not config
+		or config.at_phase ~= moon_phase
+	then
+		special_sun = "normal"
+		sun_texture = "sun.png"
+		sun_scale = normal_sun_scale
+		day_sky_color = normal_day_sky_color
+		day_horizon_color = normal_day_horizon_color
+
+		return true
+	end
+	
+	special_sun = special_moonth
+	sun_texture = config.texture or "sun.png"
+	sun_scale = config.scale or normal_sun_scale
+	day_sky_color = config.sky_color or normal_day_sky_color
+	day_horizon_color = config.horizon_color or normal_day_horizon_color
+	
+	return true
+end
+
+
+
+local function compute_astral()
+	local moon_changed = compute_moon()
+	local sun_changed = compute_sun()
+
+	local moon_config = special_moon_config[ special_moon ]
+	local sun_config = special_sun_config[ special_sun ]
+
+	local time_of_day = minetest.get_timeofday()
+	
+	if
+		special_moon ~= "normal"
+		and moon_config
+		and not moon_config.no_astral_event
+		and ( time_of_day < 0.21 or time_of_day > 0.79 )
+	then
+		astral_event = special_moon
+		astral_event_name = moon_config.name
+	elseif
+		special_sun ~= "normal"
+		and sun_config
+		and not sun_config.no_astral_event
+		and time_of_day > 0.2 and time_of_day < 0.8
+	then
+		astral_event = special_sun
+		astral_event_name = sun_config.name
+	else
+		astral_event = "none"
+		astral_event_name = "none"
+	end
+
+	return moon_changed or sun_changed
+end
+
+
+
+-- Set all sky features
+local function set_player_sky( player )
+	player:set_sky( {
+		type = "regular",
+		sky_color = {
+			day_sky = day_sky_color,
+			day_horizon = day_horizon_color,
+			night_sky = night_sky_color,
+			night_horizon = night_horizon_color
+		}
+	} )
+	
+	player:set_stars( {
+		--count = 1000,
+		star_color = star_color
+	} )
+	
+	player:set_moon( {
+		visible = moon_visible,
+		texture = moon_texture,
+		scale = moon_scale
+	} )
+
+	player:set_sun( {
+		visible = true,
+		texture = sun_texture,
+		scale = sun_scale or 3
+	} )
+	
+	-- This causes bugs (Minetest 5.3.0)
+	--player:set_clouds( { density = cloud_density } )
+end
+
+
+
+-- Check for day changes
+local function update_moon()
+	if compute_astral() then
+		for _, player in ipairs( minetest.get_connected_players() ) do
+			set_player_sky( player )
+		end
+	end
+end
+
+
+
+-- Probably deprecated
+astral.set_moon_phase = function( new_moon_phase )
+	-- May originate from command line
+	new_moon_phase = math.floor( tonumber( new_moon_phase ) or 0 ) % moon_phase_count
+
+	if new_moon_phase == moon_phase then
+		return false
+	end
+	
+	astral_day_offset = astral_day_offset + new_moon_phase - moon_phase
+	mod_storage:set_int( "astral_day_offset", astral_day_offset )
+	update_moon()
+	return true
+end
+
+
+
+astral.set_astral_day_offset = function( new_astral_day_offset )
+	-- May originate from command line
+	new_astral_day_offset = math.floor( tonumber( new_astral_day_offset ) or 0 )
+
+	astral_day_offset = new_astral_day_offset
+	mod_storage:set_int( "astral_day_offset", astral_day_offset )
+	update_moon()
+end
+
+
+
+-- API
+astral.get_astral_day_offset = function() return astral_day_offset end
+astral.get_moonth = function() return moonth , moonth_cycle[ moonth ].name end
+astral.get_moon_phase = function() return moon_phase , moon_phase_name[ moon_phase ] end
+astral.get_special_moonth = function() return special_moonth end
+astral.get_special_day = function() return special_sun , special_moon end
+astral.get_astral_event = function() return astral_event , astral_event_name end
+
+
+
+local timer = 0
+minetest.register_globalstep( function( dtime )
+	timer = timer + dtime
+	if timer < 0.5 then return end
+	update_moon()
+	timer = 0
+end )
+
+
+
+-- set the sky for newly joined player
+minetest.register_on_joinplayer( function( player )
+	set_player_sky( player, moon_phase )
+end )
+
diff --git a/commands.lua b/commands.lua
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+++ b/commands.lua
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+
+minetest.register_privilege( "astral", {
+	description = "Change astral features",
+	give_to_singleplayer = false
+})
+
+
+
+minetest.register_chatcommand( "set_astral_day_offset", {
+	params = "<phase>",
+	description = "Set the astral day offset to the given value",
+	privs = { astral = true },
+	func = function( playername, params )
+		if params == nil or params == "" then
+			minetest.chat_send_player(playername, "Missing day offset number")
+		else
+			astral.set_astral_day_offset( params )
+		end
+	end
+})
+
+
+
+minetest.register_chatcommand( "get_astral_day_offset", {
+	description = "Get the astral day offset",
+	privs = { astral = true },
+	func = function( playername )
+		minetest.chat_send_player(playername, "Astral day offset: " .. astral.get_astral_day_offset() )
+	end
+})
+
+
+
+minetest.register_chatcommand( "get_astral_event", {
+	description = "Display the current astral event",
+	privs = { astral = true },
+	func = function( playername )
+		local id, name = astral.get_astral_event()
+		minetest.chat_send_player(playername, "Astral event: " .. name )
+		--minetest.chat_send_player(playername, "Astral event: " .. name .. "   " .. minetest.get_timeofday())
+	end
+})
+
+
+minetest.register_chatcommand( "get_astral_day", {
+	description = "Display the current astral day",
+	privs = { astral = true },
+	func = function( playername )
+		local moonth , moonth_name = astral.get_moonth()
+		local moon_phase , moon_phase_name = astral.get_moon_phase()
+		local special_sun, special_moon = astral.get_special_day()
+		local event_id, event_name = astral.get_astral_event()
+		local time_of_day = minetest.get_timeofday()
+		local day = minetest.get_day_count()
+		
+		minetest.chat_send_player(playername, "Astral day: " .. moon_phase_name .. " (" .. moon_phase .. ") of " .. moonth_name .. " (" .. moonth .. ") -- special: ".. special_sun .. " / " .. special_moon .. " => " .. event_name )
+		--minetest.chat_send_player(playername, "Astral day: " .. moon_phase_name .. " (" .. moon_phase .. ") of " .. moonth_name .. " (" .. moonth .. ") -- special: ".. special_sun .. " / " .. special_moon .. " => " .. event_name .. " --  D: " .. day .. " H: " .. time_of_day )
+	end
+})
diff --git a/init.lua b/init.lua
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+-- Global landscape_shaping namespace
+astral = {}
+astral.path = minetest.get_modpath( minetest.get_current_modname() )
+
+-- Load files
+dofile( astral.path .. "/astral.lua" )
+dofile( astral.path .. "/commands.lua" )
+
+
diff --git a/mod.conf b/mod.conf
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+++ b/mod.conf
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+name = astral
+title = Astral
+author = cronvel
+description = "Moon phase, featuring rare blood moon, blue moon, super moon, and solar eclipse!"
diff --git a/screenshot.png b/screenshot.png
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