Tweet Archive 2020 05
RT @artistescher: Wood near Menton, 1921 #mcescher #opart
Replying to @zzznah
Actually I was wrong! Did you see Timetrap on Netflix? It was pretty exciting.
Replying to @FermentDC
This was done in 1928, so you can’t criticize him for not using more samples per pixel. https://twitter.com/artistescher/status/1261559423761371136
The spots in a Gray-Scott system have strong self-repair properties. We can infect them with small blue dots that hurt them, and they actually move around as they try to repair the damage. As long as there is somewhere to go…
Red dots help them divide. https://youtu.be/1XbV0_UviQI
Replying to @barrygoldman1 and @FlexMonkey
P. Gray, S.K. Scott (1984) “Autocatalytic reactions in the isothermal, continuous stirred tank reactor: Oscillations and instabilities in the system A + 2B → 3B; B → C” Chemical Engineering Science, Volume 39, Issue 6. PDF: http://www.academia.edu/download/43280925/Autocatalytic_Reactions_in_the_Isotherma20160302-24997-jbawss.pdf
Replying to @tim_hutton
Currently there are only four possible species: no dots, red dots, blue dots, both. Is there a way to support an indefinite number of species?
Can we support internal state changes in the cell?
Is there a way to support aggression/defence between cells?
Replying to @tim_hutton
What I like about this system:
- It’s a PDE! There are no agents or non-local effects.
- As with GS solitons, the ‘cells’ define themselves and can die by losing their self-organization.
- Multiple species can co-exist and compete.
- Cells inherit their parent’s properties.
Replying to @NathanielVirgo
How does the ecological feedback work?
Replying to @koujaku
Contributes to the success of others: ✅ Builds on the work of others: ✅
Amazing to have windows from multiple operating systems mixed together, especially for developing cross-platform applications. In front: an app running in Ubuntu (with GTK3) running through WSL2 and VcXsrv. Behind: the native Windows version of the same app. Built with wxWidgets. https://twitter.com/tomwarren/status/1262762409661325312
New mathematical art by Ghee Beom Kim. Four interlaced hexagonal grids. What is the most symmetric arrangement possible? https://www.facebook.com/photo.php?fbid=10222756481124684&set=a.10218858602720160
Replying to @tim_hutton
There seems to be a single pleasing symmetrical solution. Here’s a sketch of the repeating unit. Only single bar ‘I-beam’ shapes visible from either side. Are there any other configurations that keep this property, or is this the only one. And does this pattern have a name?
Four interlaced hexagon grids, inspired by Ghee Beom Kim.
It’s so pleasingly symmetrical that it must already be known and have a name?
Replying to @tim_hutton
Code if you want to modify: https://www.openprocessing.org/sketch/904876
Ghee Beom Kim’s original post: https://www.facebook.com/photo.php?fbid=10222756481124684
RT @eelcobvr:
