I avoided double buffering to save precious RAM for audio purposes, thus some limitations in my object.
As my object allows to draw the content of an oscillo scope object, it may be easy to make an object compatible with a scope object to draw other curves, such as envelopes.
If you want to use two displays, verify that you can change their I2C address (generaly with some strap or soldering desoldering a 0 Ohm resistor).
On Axoloti I dont really need the graphics so I can do with the simple version and save ram for other puposes.
Thanks for the tip 
Object tiar/8bit/gen t
help/test patch available in
Help -> Library -> Community -> tiar -> 8bit -> gen t
(triggered by C4 and D4 keys)
This object is directly inspired by this video and page:
Now, you can experiment and use in the Axoloti this kind of 8bit sound with the tiar/8bit/gen t:
Now, let's experiment and share some 8bit formulas !
I begin:
accelerating engine:
t*t>>15^0x55555555" t*t>>15 " generates a pitch increasing sawtooth
" ^0x55555555 " inverts one in two bits, it transforms the sawtooth into a more complicated waveform (sort of fractal)
(this trick is the base for the dist/fractalI distortion)
ahem, this has been done before
see here: https://sebiik.github.io/community.axoloti.com.backup/t/hellcore-contributions/1745
Thanks @lokki, I missed this one ! it really looks great and includes some presets !
see the help patch to get an idea: menu: Help -> Library -> Community -> tiar -> dist -> fractalI and fractalI_multisin
This is a very special kind of distortion that generate lots of harmonics.
It is roughly x8 oversampled to limit aliasing.
The help patch uses a simple sine wave as an input.. but the output is somewhat more "powerful".
Just want to give a huge thumbs up from here @SmashedTransistors. Your objects are really cool and for a beginner coder like me, I learned a lot from looking at some of your objects.
hey @SmashedTransistors any chance the iteration speed of these fractal distortions could be modulated? that would add the possibility to have slower evolving distortion sounds...
Thanks @jaffasplaffa,
I plan to take a "break" to add some comments in the patches and in the objects code.
Hi @lokki,
The distortions themselves are static functions (for a given input value, they will always give you the same output value).
The fractal distortions in the examples seem to be modulated because their inputs are modulated.
The inputs can be modulated in many interesting ways. I have experimented with some and
I have added a few help patches in Menu: Help -> community -> tiar -> dist
Notes:
Sounds great and would be appreciated. Some of your code... Just seems like voodoo to me, haha Mostly because its a lot more advanced than what I understand atm...... 
But its getting better. I actually got a simple VST written the other day, using Juce. Just one of the simple tutorials and it actually loads/works in Logic, which made me pretty excited. But so many things to learn in audio coding and i am really glad that we have these open source projects, where there is so many resources available. But going from Axoloti objects to Juce, where I have to worry about classes and all kind stuff which is not needed in Axoloti... Is another world. Should have started with coding 10 years ago
haha, thanks for the clarification. i was obviously a bit in a hurry when i wrote this. by looking at the help patches it is obvious that the "modulation" is external. great!
Well, i tend to use short variable names to get compact and more readable code, but i try to stick to the same names (i.e. "p" is for phase, "dp" is for delta phase(phase increment)... )
That's great news. 
I tried to make some VST "some" time ago:
http://www.vst4free.com/free_vst.php?id=2219
But I let it go because I spendt more time on GUIs than on DSPs.
I guess that things has evolved since then.
Yeah thats a really cool GUI.
Yeah today things are much easier. Juce handles a lot of the stuff that make the process of making a plug in very long. it handles the framework, libraries etc. Even the GUI, you can use some bundled knobs faders etc..
I did try a few times but when I actually got it working it only took me like a couple of hours getting it working. And Juce also offers a build in test system, so you can actually code in "real time" almost like using Axolotis editor, but just with VST's Its pretty cool .All though first one I did, I made it in Xcode. I need to get that set up, so I can do it "real time"
A lot of the big vendors use it too. I think Eventide makes the UI in Juce and a also Slate Digital for example. So its definately "professional standard".
Juce?
I am not 100% sure about this, "legal terms" are not really my speciality, but I think they have different licences and I think even with the free one you are allowed to sell plug ins, you just have a limit of how much dollars you are allowed to make from a personal account. The bigger accounts, which you pay for, you can make unlimited dollars
(If i understand the above correctly)
Anyway, Maybe we should move this Juce talk to another thread, or just call it quits, so we dont spam your contribution page 
Back to the Fractal distortion topic...
Here are some more explicit graphs of the distortions functions :
(poitive part of the functions, the negative part being symetric).
Fractal I is based on one in two bit inversion
Fractal II is based on Gray code
Fractal III is based on bit swapping by pairs
Fractal IV
Fractal V
Fractal VI
[EDIT 20 jan 18]Added Fractals IV, V and VI
see the help patch to get an idea: menu: Help -> Library -> Community -> tiar -> dist -> fractalRing
This is a two input fractal distortion sort of ring modulator.
Here is one quadrant of the function:
The help Patch shows how it can be used as a waveterrain (thanks to @DrJustice for the quad_sine oscillator).
In the help patch you can change the Decay and Sustain of the ring input enveloppe to change the dynamics of the effect, you can change the Y gain to have some assymetry, you can also add offset to X and Y to change the distortion.
