Difference between revisions of "love.keyboard.isDown"

(Examples)
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{{param|boolean|down|True if the key is down, false if not.}}
 
{{param|boolean|down|True if the key is down, false if not.}}
 
== Examples ==
 
== Examples ==
Move circle when the player press the left and right keys.  
+
Moving the circle when the player press the left and right keys.
 
<source lang="lua">
 
<source lang="lua">
 
function love.load()
 
function love.load()
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end
 
end
 
</source>
 
</source>
 +
 
== Function ==
 
== Function ==
 
{{newin|[[0.7.2]]|072|type=variant}}
 
{{newin|[[0.7.2]]|072|type=variant}}

Revision as of 23:51, 14 February 2019

Checks whether a certain key is down. Not to be confused with love.keypressed or love.keyreleased.

Function

Synopsis

down = love.keyboard.isDown( key )

Arguments

KeyConstant key
The key to check.

Returns

boolean down
True if the key is down, false if not.

Examples

Moving the circle when the player press the left and right keys.

function love.load()
  x, y = 20, 20
end

function love.update(dt)
   if love.keyboard.isDown("left") then
      x = x - 10 * dt
   end
   if love.keyboard.isDown("right") then
      x = x + 10 * dt
   end
end

function love.draw()
    love.graphics.circle("line", x, y, 10)
end

Function

Available since LÖVE 0.7.2
This variant is not supported in earlier versions.

Synopsis

anyDown = love.keyboard.isDown( key, ... )

Arguments

KeyConstant key
A key to check.
KeyConstant ...
Additional keys to check.

Returns

boolean anyDown
True if any supplied key is down, false if not.

Examples

Increase a value while a key is held down

local val = 0;
function love.update(dt)
    -- We will increase the variable by 1 for every second the key is held down.
    if love.keyboard.isDown("up") then
        val = val + dt
        print(val)
    end

    -- We will decrease the variable by 1/s if any of the wasd keys is pressed. 
    if love.keyboard.isDown('w', 'a', 's', 'd') then
        val = val - dt
        print(val)
    end
end

See Also


Other Languages