[SOLVED]Trying to write the right expresion

I have a tiled BG. But i want the texture to be randomly loaded on the start of layout.

i puropusly named the tiledBG pngs 1.png, 2.png, 3.png... so i can use "Random(#)" expresion on them instead of using variable switches.

The problem is i cant write a working expresion for this.

i tried

AppPath & Random(10)"png"

but this doent work.

AppPath & Random(10)&"png"

AppPath & "Random(10)png"

returned negative too.

Anybody have idea how to write this correctly?

The second one is corrent, but you forgot the '.' in ".png"

AppPath & random(10) & ".png" or

AppPath & "" & random(10) & ".png" - sometimes i have to add empty "" for that to work and sometimes works without it :/

if your files start at 1.png add random(10)+1

ahh thank you guys. i am a clumsy GameDev ^^ i always lost this small little things that makes the whole structure calapse

Random(10) +1 unless you have a 0.png

Like shinkan said

...

sometimes i have to add empty "" for that to work and sometimes works without it :/

...

Although Construct tries its best to convert between numbers and text, you are free to explicitly convert to text with the expression 'str':

AppPath & str(random(10) + 1) & ".png"

This should work without exception.

oww that's a great tip, thanks tulamide!

> ...

> sometimes i have to add empty "" for that to work and sometimes works without it :/

> ...

Although Construct tries its best to convert between numbers and text, you are free to explicitly convert to text with the expression 'str':

AppPath & str(random(10) + 1) & ".png"

This should work without exception.

Ampersand concatenates to string, so it should automatically be converted.

I've seen others use the plus sign, and it worked, but I can't think of a situation where that method would be better.

okey. so to not make another thread:

do you know if theres a way to write an expresion so the value would be picked randomly but from a pattern?

example.

i want the angle of sprite X, to be randomly set from 0, 90, 180 or 270.

Is there a way to do this without the use of switches?

Do it with math:

random(3)* 90

Where is the problem? <img src="smileys/smiley2.gif" border="0" align="middle" /> Don't think too complicated...

this is one of those moments i want to smack myself in the face.

Ahhh... why i am always blind for the obvious solutions?

Thank you GF.

another thing. this:

AppPath & "" & random(10)+1 & ".png"

gives me error saying:

'+' does not work on 'integer' and 'string'

the heck?

Try AppPath & "" & str(random(10) + 1) & ".png"

Although, I don't understand why you have the "" in there, as that doesn't add anything to the string.

>

> > ...

> > sometimes i have to add empty "" for that to work and sometimes works without it :/

> > ...

>

> Although Construct tries its best to convert between numbers and text, you are free to explicitly convert to text with the expression 'str':

>

> AppPath & str(random(10) + 1) & ".png"

>

> This should work without exception.

Ampersand concatenates to string, so it should automatically be converted.

I've seen others use the plus sign, and it worked, but I can't think of a situation where that method would be better.

• That's what I said, Construct tries its best to convert.
• Never use the plus sign, the only sign you can rely on is ampersand.
• there are situations where Construct will be confused with the information given. Just create a text box and do:

      + System: Start of layout

      -> Text: Set text to AppPath & random(10) + 1 & ".png"

Do you now see, where that str method would be better? <img src="smileys/smiley2.gif" border="0" align="middle" />

EDIT: Sorry, after posting I realized that Jayjay already gave that example.