weather/api.md

Register weather types as follows:

weather.register_weather = function(name, def)

def is a table with these values:
particle = {
		pos = {x=0, y=0, z=0},
		velocity = {x=0, y=0, z=0},
		acceleration = {x=0, y=0, z=0},
		expirationtime = 1,
		size = 1,
		collisiondetection = false,
		collision_removal = false,
		vertical = false,
		texture = "image.png",
		playername = "singleplayer",
		animation = {Tile Animation definition},
		glow = 0,
		qty = 64 - required! (number of particles)
	},
hud = "image_name.png",
skybox = false used to trigger plain skybox event
clouds = true shows clouds(default)
cloud_def = set cloud parameters
	* `parameters` is a table with the following optional fields:
			* `density`: from `0` (no clouds) to `1` (full clouds) (default `0.4`)
			* `color`: basic cloud color with alpha channel, ColorSpec (default `#fff0f0e5`)
			* `ambient`: cloud color lower bound, use for a "glow at night" effect. ColorSpec (alpha ignored, default `#000000`)
			* `height`: cloud height, i.e. y of cloud base (default per conf, usually `120`)
			* `thickness`: cloud thickness in nodes (default `16`)
			* `speed`: 2D cloud speed + direction in nodes per second (default `{x=0, z=-2}`).
sound = name(s) of the sound clip(s)
* `parameter` string or a table:
	'weather_raindrop'
	OR
	{'weather_raindrop','weather_wind'}
gain = float value,
lightning = boolean

Register weather systems to a biome:

weather.register_biome = function(name, def)

def is a table of weather patterns, consisting of several types of weather and
it must use the weather type names that were registered with weather.register_weather()

example:

savanna = {
	'clear','cloudy','light_rain','overcast','cloudy'
},

The weather progresses along the entries at random intervals so the size of the array is entirely up to you!