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Using math expressions


UP Deck tries to evaluate anything enclosed in square brackets. When a deck button is pressed, math expressions are evaluated before the actions are sent to OBS.

 

 

Example - if you have defined values $stream_width, $stream_height and $margin (see setting custom values), then you could position an object near the top right of the screen  by using;

 

Place object near top right

position

scene=_current

item=Icon

x=[ $stream_width - $margin ]

y=[ $margin ]

 

 

 

As well as the standard math operators for addition, subtraction, multiplication and division (+, -. *, /), all of the functions listed in the Corona Math Library will also work.

 

 

Eample - update a text object with a random number between 5 and 10.

 

Update text source with random number

text

source=LuckyNumber

text=[ random(5, 10) ]

 

 

When used with loops, this functionality allows you to create some more complex animations without having to write a lot of individual button commands.

 

 



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