LambdaHack-0.2.1: A roguelike game engine in early and very active development

Game.LambdaHack.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

 Eq Time Ord Time Show Time Binary Time

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

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.

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).

timeFit :: Time -> Time -> IntSource

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

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

Scale time by an `Int` scalar value.

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

Constructor for content definitions.

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

Scale speed by an `Int` scalar value.

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

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

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

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.