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Why this condition doesn't work?

• 4 posts
• Hi.

In my project, I set a custom opacity on two wall objects : 50 and 70.

"If object is opacity 50" works, but not "if object is opacity 70".

This is weird. However If I do :

"f object is opacity <71 and if object is opacity > 69"

It works.

I'm kind of puzzled. Any idea why it doesn't work with a single "equal" ?

• This has to do with how computers store numbers. I believe internally C2 uses a range of 0 to 1 for opacity, but has to convert the value to the 0 to 100 range. This leads to inaccuracies. You'll see many forum posts about checking exact numbers. It's generally best to assume a small range. Checking round(timeTravelable.Opacity) = 70 will also work.

If you log the values of opacity in the Console, you see that the opacity in question is actually 69.999999, where as the other is 50.

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• Hi, the reason behind this is that opacity, believe it or not, does not go straight in 1, 2, 3, 4 numbers but for example from 1.1231 to 2.3424 then 3.4145 and so on with totally random values after a dot.

You can work this out with System->Is between values.

This would be something like:

timeTravelable.opacity

69

71

Try this and manipulate values to see if it works : )

• Thank you !

• 4 posts