How to check if 2 keys are down?

[IAsep-TrixI]

I noticed that my player goes vertical if holding A and D, now i want to change the characters picture to a vertical picture if the 2 keys are down, but how do i detect if the 2 are down?

[DaedalusYoung]

Code: Select all

if love.keyboard.isDown('a') and love.keyboard.isDown('d') then
   --both keys are pressed
end

Assuming you're reading the keypresses in love.update.

[davisdude]

You can also do

Code: Select all

love.keyboard.isDown( 'a' and 'd' )

[DaedalusYoung]

Can you? 'a' and 'd' just returns true, doesn't it (regardless of what strings you put in anyway), so how would love.keyboard.isDown check against just a boolean?

[davisdude]

It works. Of course, you would have to do if love.keyboard.isDown( 'a' and 'd' ) then, but yes, it does work.

[DaedalusYoung]

Hmm, that doesn't seem to work for me though. If I press just 'd' it already says "You did it!", it doesn't see I haven't pressed 'a'.

[bartbes]

"'a' and 'd'" returns 'd', so that's why that works. What he's confused with is that you can pass both to isDown and it will check if either is down.

[Robin]

Just to be super-extra clear:

Code: Select all

love.keyboard.isDown( 'a' and 'd' )

is NOT a substitute for

Code: Select all

love.keyboard.isDown('a') and love.keyboard.isDown('d')

(instead, it's a weird way of saying

Code: Select all

love.keyboard.isDown( 'd' )

)

On the other hand,

Code: Select all

love.keyboard.isDown( 'a', 'd' )

IS a substitute for

Code: Select all

love.keyboard.isDown('a') or love.keyboard.isDown('d')

[Roland_Yonaba]

As a follow up to the great response of the Great Robin, I would just like to mention this part of PiL about logical operators, which is worth reading.

[davisdude]

My bad, sorry for any confusion! Glad that this is cleared up.