fl.change~ object request

[jamesb93]

It would be handy to be able to filter out repeated frames. Is there a way to do this currently? If not, can I suggest an fl.change~ object that only outputs a frame if it is different from the previous?

[AlexHarker]

You could test that the lists match using an fl.==~ operation on two frames summed to the length of the frame on one side. This could give you a 1 / 0 for whether the frame was the same from which you could drive an fl.route~ or similar to let the frame through or not.

[AlexHarker]

For @fearn-e:

• this object would need to have an output that sometimes (but not always) triggers. That can be seen in FrameLib_Route::Valve (setInput mode and also the update method).
• then it would need an update Method that figures out if the frame has changed (vs. a stored version - see FrameLib_FrameDelta) and stores the new input at the end.
• If it is the same the update method sets the output not to trigger, otherwise it sets it to trigger
• process will now only run if the input has changed and just needs to copy input to output (there's a special methods for that - see FrameLib_Route::Valve)

[jamesb93]

👀

[fearn-e]

@AlexHarker Hold on, I just got round to starting this, ran the python script to make a new object, and it says fl.change~.cpp already exists. So I go and have a look, and what do you know.
https://github.com/AlexHarker/FrameLib/blob/new-objects/FrameLib_Objects/Routing/FrameLib_Change.cpp
(edit because i'm silly and linked to the wrong file initially)

I guess the only question is, is this object finished or do you want me to take a look at it anyway?

[AlexHarker]

Ah yes it would appear that I did do this and then promptly forgot all about it. It looks like I actually did the object in full, (including VS project etc.) although I suspect I did not write a helpfile.

Can you look to see if there is a proper helpfile and if not, can you make one and test that the object works...

[AlexHarker]

Now included in develop at dad4dcb.