Difference between revisions of "love.update"
m (Fixed formatting) |
m |
||
Line 1: | Line 1: | ||
Callback function used to update the state of the game every frame. | Callback function used to update the state of the game every frame. | ||
− | |||
{{notice|love.update will not be called inside of [[love.thread|Threads]]. This is not a problem if you use this callback inside of main.lua}} | {{notice|love.update will not be called inside of [[love.thread|Threads]]. This is not a problem if you use this callback inside of main.lua}} | ||
− | + | == Function == | |
=== Synopsis === | === Synopsis === | ||
<source lang="lua"> | <source lang="lua"> |
Revision as of 08:33, 23 March 2019
Callback function used to update the state of the game every frame.
love.update will not be called inside of Threads. This is not a problem if you use this callback inside of main.lua |
Function
Synopsis
love.update( dt )
Arguments
number dt
- Time since the last update in seconds.
Returns
Nothing.
Examples
Run a function called think inside a table called npc once per second.
dtotal = 0 -- this keeps track of how much time has passed
function love.update(dt)
dtotal = dtotal + dt -- we add the time passed since the last update, probably a very small number like 0.01
if dtotal >= 1 then
dtotal = dtotal - 1 -- reduce our timer by a second, but don't discard the change... what if our framerate is 2/3 of a second?
npc.think()
end
end
Change a variable var at a constant rate (+/- 3 per second in this example).
var = 10 -- arbitrary starting value
rate = 3 -- change to change the rate at which the var is changed
function love.update(dt)
if love.keyboard.isDown("down") then -- reduce the value
var = var - (dt * rate)
end
if love.keyboard.isDown("up") then -- increase the value
var = var + (dt * rate)
end
end
See Also
Other Languages
Dansk –
Deutsch –
English –
Español –
Français –
Indonesia –
Italiano –
Lietuviškai –
Magyar –
Nederlands –
Polski –
Português –
Română –
Slovenský –
Suomi –
Svenska –
Türkçe –
Česky –
Ελληνικά –
Български –
Русский –
Српски –
Українська –
עברית –
ไทย –
日本語 –
正體中文 –
简体中文 –
Tiếng Việt –
한국어
More info