Avisynth: Conditional User Defined Functions?
 

How can I execute conditional user defined functions like:

c = (x==y) ? userdefined1() : userdefined2()

where userdefined1 and userdefined2 results, are clips of not equal resolution.

The direct way :
The smart (and more efficient) way
Never used the second one but should work.

Maybe what you want is something like this :?:

x==y ? c=userdefined1() : c=userdefined2()

-kwag

And if the "then" way will "do nothing" I remember still this was

x==y ? c=userdefined1() : NOP

Let's go for an other wzy to do all that :

Do you need more ? ;-)

Why that one :?:
Either userdefined1() or userdefined2() will ALWAYS evaluate, so "c" will always have the value of the true or false condition.
So c=last is redundant, because it's already assigned once in either userdefined1() or in userdefined2() ;)
But then, we can get really obfuscated here, don't we :lol:

-kwag

Re: Conditional User Defined Functions
 

As I can see

and

and

are the same.

In Dialhot example, he asign the userdefined functions 1 an 2 to two variables and later (translation) wright the conditional statement same like mine one.
In Kwag example, he define his condition and later asign the results at c.
It is like say "If x = y, then c=udf1, if not c=udf2", and my way, "c=udf1 if x = y,c=udf2 if not". But what is the correct way? or all are the right ones?

Re: Conditional User Defined Functions
 

Nope. Not the same at all.

The statement:
c = (x==y) ? u1 : u2 assigns true or false ( 1 or 0 ) to c, depending on the value of x and y.

The statement:
x==y ? c=userdefined1() : c=userdefined2() assigns the correct value, depending on the condition that evaluates to true or false.

-kwag

Ohh!, I understand, thank you, Kwag.
And thanks to all.

Another question:

When I use the NOP statement, the script will continue beyond the conditional evaluation:
For example:

x==y ? c=userdefined1() : NOP
bicubicresize()...

In this case, resize will be applied whatever would be the condition?
(I hope you understand my english!!!)

Just in case:
:arrow: == (comparison) is not the same as :arrow: = (assignment) ;)

-kwag

Sorry, I had edit my previous post and you don't saw the last question.

Re: Conditional User Defined Functions
 

Nope !

Actually this statement set c to u1 is the condition is true, u2 if not. And actually u1 is equal to the result of userdefined1 and u2 the result of userdefined2.

So that is EXACTLY what wee need to have.

The only advantage of this uppon the previous is that you evaluate userdefine1 OR userdefine2, and not both ones.
So it's more efficient (as I told in my first post !)
:arrow: but it will work only if avisynth grammar accepts non constant lvalues with ":" operator :!:

Avisynth is not C language.

removed stupid question