Not sure if this is correct syntax but it comes from the urbin acid script here
http://www.aljacom.com/~gimp/Urban_Acid_2.6.scm


But it is also written like this in another script
http://snipplr.com/view/21978/gimp-scri ... ephotoscm/


Perhaps it is the addition of the hash mark?

Or perhaps this will help.
http://code.google.com/p/paynekj-gimp-s ... curves.scm

In addition to what Rod posted, from the Script-Fu Procedure Browser..



The 3rd argument specifies the number of integer values in the 4th argument (which is an integer array).

For example, a 4 element integer array: #(int1 int2 int3 int4)

Or you can define and initialize the array, as shown in the first example Rod posted.

The only difference in syntax is that gimp-curves-explicit always uses 256 as the value of the 3rd argument.

Wow
So is value = red,green,blue, and alpha channels combined.
and RGB = just red green and blue without alpha?

Cool! so what are you working on now?

No, what you've presented will not work. You have defined a procedure which calls itself and will loop forever. I think you have misplaced a parenthesis.

The gimp-curves-* procedures expect the last argument to be a Scheme 'vector', which in some other programming languages might be called an 'array'. A 'vector' is very similar to a Scheme 'list' but has some important differences (e.g., you can't take a 'car' or a 'cdr' of a vector and you can't use 'map' or 'apply' on them).

The methods of specifying the gimp-curves vector that have been presented so far in this thread are overly complicated at best, and might not work depending upon the user's setup.

There are two simple ways of creating a 'vector' suitable for use in the gimp-curves-* filters. The first is to use the #(...) form to generate a constant vector.



But the #(...) form only works for constants; i.e., everything in the curves vector has to be a specific number and not a variable or result of an evaluated function.

If you want to create a calculated curve, or one that is obtained from external data (such as a file), then you need to use the (vector ...) procedure.



These two forms of #(...) and (vector ...) are quite similar to their corresponding operations with lists: '(...) and (list ...)

Of course, you can generate your vector of points using an algorithmic procedure, just make sure your final result is vector and that you pass the number of points in the vector to the gimp-curves-* procedure.

What does the 6 represent in this procedure?

That is the number of elements in the vector.

Ok, now I get it. Thanks.

As saulgoode mentioned, single dimensional arrays are sometimes referred to as "vectors". Two dimensional arrays are sometimes referred to as "tables" and with three or more dimensions, they're called N-dimensional arrays (or multidimensional arrays). Technically, they are all arrays.

Unfortunately, GIMP's implementation of Scheme (TinyScheme) doesn't directly support N-dimensional arrays (can be simulated), as do more robust versions of Scheme. The array commands have been dropped in favor of vector commands.

In the interest of clarity, I think a few more basic examples might be helpful..

These two methods of defining the single dimensional array: my-vector are identical..
(define my-vector #(8 16 32 64))
(define my-vector (vector 8 16 32 64))

They both return my-vector as
#( 8 16 32 64 )

The value of each element in my-vector can be changed by using vector-set!
(vector-set! my-vector 0 255)

my-vector returns..
#( 255 16 32 64 )

Note that when using vector-set!, the index to each element in my-vector begins with zero (0-3 not 1-4)

You can use variables within vector-set! to change the value of each element in my-vector.

(define index 1)
(define new-value 200)
(vector-set! my-vector index new-value)

my-vector now returns..
#( 255 200 32 64 )


Looks like that will result in an infinite recursion loop.

It should be more like this..

(define splineValue #(0 0 38 31 125 129 197 223 255 255 255 255 255 255 255 255))

or

(define splineValue (vector 0 0 38 31 125 129 197 223 255 255 255 255 255 255 255 255))

(gimp-curves-spline inner-bevel-layer 0 16 splineValue)

Hope that helps!!