Safe Haskell	None

Game.LambdaHack.Common.Time

Description

Game time and speed.

Synopsis

Documentation

data Time Source

Game time in ticks. The time dimension. One tick is 1 microsecond (one millionth of a second), one turn is 0.5 s.

Instances

Enum Time
Eq Time
Ord Time
Show Time
Binary Time

timeZero :: Time Source

Start of the game time, or zero lenght time interval.

timeClip :: Time Source

At least once per clip all moves are resolved and a frame or a frame delay is generated. Currently one clip is 0.1 s, but it may change, and the code should not depend on this fixed value.

timeTurn :: Time Source

One turn is 0.5 s. The code may depend on that. Actors at normal speed (2 m/s) take one turn to move one tile (1 m by 1 m).

timeAdd :: Time -> Time -> Time Source

Time addition.

timeFit :: Time -> Time -> Int Source

How many time intervals of the latter kind fits in an interval of the former kind.

timeNegate :: Time -> Time Source

Negate a time interval. Can be used to subtract from a time or to reverse the ordering on time.

timeScale :: Time -> Int -> Time Source

Scale time by an Int scalar value.

timeEpsilon :: Time Source

An infinitesimal time period.

timeToDigit :: Time -> Time -> Char Source

Represent the main 10 thresholds of a time range by digits, given the total length of the time range.

data Speed Source

Speed in meters per 1 million seconds (m/Ms). Actors at normal speed (2 m/s) take one time turn (0.5 s) to move one tile (1 m by 1 m).

Instances

Eq Speed
Ord Speed
Show Speed
Binary Speed

toSpeed :: Double -> Speed Source

Constructor for content definitions.

speedZero :: Speed Source

No movement possible at that speed.

speedNormal :: Speed Source

Normal speed (2 m/s) that suffices to move one tile in one turn.

speedScale :: Rational -> Speed -> Speed Source

Scale speed by an Int scalar value.

speedAdd :: Speed -> Speed -> Speed Source

Speed addition.

speedNegate :: Speed -> Speed Source

Speed negation.

ticksPerMeter :: Speed -> Time Source

The number of time ticks it takes to walk 1 meter at the given speed.

traveled :: Speed -> Time -> Int Source

Distance in meters (so also in tiles, given the chess metric) traveled in a given time by a body with a given speed.

speedFromWeight :: Int -> Int -> Speed Source

Calculate projectile speed from item weight in grams and speed bonus in percents. See https://github.com/kosmikus/LambdaHack/wiki/Item-statistics.

rangeFromSpeed :: Speed -> Int Source

Calculate maximum range in meters of a projectile from its speed. See https://github.com/kosmikus/LambdaHack/wiki/Item-statistics. With this formula, each projectile flies for exactly one second, that is 2 turns, and then drops to the ground. Dividing and multiplying by 2 ensures both turns of flight cover the same distance.