GIMP Version: 2.8.10
Operating System: Windows
GIMP Experience: Intermediate Level

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Is there a gimp library where I could find simple single script commands, so I could piece some together, and make a script?

Such as a script command to:
* duplicate a layer.
* change the layer mode.
* rotate a layer.

And other simple commands.

I have tried looking at existing scripts but the lines seem to run together (at least in my head, lol) , and I get confused.

Greetings!

I would suggest starting with the links in this thread: Script Writing Resources For GIMP. Have a look at the links to Fencepost's Script Writing Tutorials, which are included in that thread.

If you have any questions, just ask and our members will be happy to assist.

Thanks GnuTux and Graechen. I will check out the resources, and probably be asking some questions here.

You should find this out by reading the information already provided, but for a quick look at the commands available, go to...
Help > Procedure Browser
With that information and looking over an existing similar script to what you want to build, you should be able to grasp the basic concept of how everything works.
Good Luck!

I always recommend Monsunamis script lessons. Start here.

(define new-layer (car (gimp-layer-copy orig-layer TRUE))) ; should use a 'let' variable rather than 'define'
(gimp-layer-set-mode new-layer SCREEN-MODE) ; see PDB Browser for available layer modes
(gimp-item-transform-rotate new-layer (* angle (/ *pi* 180)) TRUE 0 0) ; angle should be in degrees

The PDB Browser is your friend (either "Help->Procedure Browser" or use the "Browse" button in the Script-fu console).

If you can't find what you need in the PDB Browser or don't understand how to use the information, feel free to ask.

Thanks Rod! I will take a look this weekend.

Thanks! That certainly helped me understand the console better.

If you have to learn either Scheme or Python, go for Python:
- In Gimp, Python can do a lot more things
- Python has plenty of uses outside of Gimp
- Python is generally considered easier to learn

The only merit of Scheme is that it used to be the only standard script language for Gimp, but since 2.8 Python is standard, too.

Thanks a lot, ofnuts. I think scheme is over my head. Maybe python will be easier for me.