Expressions with Remainders

[dchristo]

I'm trying to write an expression to move a piece of media in increments of 10 pixels.  Given a variable of 0-10, I would like output of 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100. 

The expression I think should work is:

 

(variable - (variable % 1)) * 10

 

I'll be ramping the variable, so I need to remove the decimal porition.  The (variable % 1) should return only the decimal portion of the variable, and subtracting it from itself should give me integers only.

 

I'm using this expression in the X axis of a position tween, and when I set the variable to 7.6, the tween is being set to 76 pixels, whereas I'm expecting it to be 70.  Is this a bug, or am I misinterpreting how the % operator should work?  Is there another way to accomplish this?

 

Watchout 6.1.5 Production (haven't tried on a display), Win7

 

Thanks,

 

--D

[Mike Fahl]

try 

 

    variable*10 - ((variable*10) % 10)

 

instead. The % operator works only with integers, not with fractions.

[dchristo]

Thanks, Mike.  This mostly works; however, when ramping the input (for example, over 5 seconds), the media jitters back and forth a couple of pixels before in between big jumps.

 

--D 

[Mike Fahl]

Should have nothing to do with the above formula as far as I can tell. Where's the input variable coming from? Most likely, there's some "jitter" here.

[dchristo]

Using the setInput command to ramp over a period of time:

 

setInput myVariable 10 5000

 

--D

[Mike Fahl]

I see no reason why a plain fade to value should result in "jitter". You may want to bring this up with support.

 

Mike