sketch-a-day
coding a visual idea a day
Welcome! My name is Alexandre Villares and since January, 2018 I have been coding sketches everyday, publishing the source code in the same repository that stores this page, github.com/villares/sketch-a-day.
The results here are mostly tentative, exploratory, and I don’t feel like they need to be relevant or meaningful on any particular day. The everyday practice leads to the emergence of ideas that I consider interesting, worthy of further exploration. Some of those have been added to selected work, this collection itself became valuable for me, and it is my pleasure to share it with anyone willing to explore coding as a creative and expressive medium.
You can follow me on Mastodon @villares@ciberlandia.pt or at @villares@pynews.com.br, where I post most of my daily sketches. Please do not hesitate to contact me regarding licenses to use my work, teaching opportunities, consulting or other projects.
If you appreciate what I have been doing, you may also support my artistic work, research and open educational resources I publish on-line using the Brazilan PIX key at 46c37783-5edb-4f1c-b3a8-1309db11488c, PayPal or Wise.
2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018
sketch_2025_11_07
#SãoPaulo
sketch_2025_11_06
#São Paulo, “walk networks”, dados do #OpenStreetMap
sketch_2025_11_05
sketch_2025_11_04
#OpenStreetMap
sketch_2025_11_03
Back to my map studies… Poly data (c) #OpenStreetMap contributors \nhttps://www.openstreetmap.org/copyright
sketch_2025_11_02
failed #mediapipe experiment…
sketch_2025_11_01
Feito a maior parte duarante a apresentação no Compoética 2025
sketch_2025_10_31
#LSystem & #shapely
sketch_2025_10_30
sketch_2025_10_29
sketch_2025_10_28
sketch_2025_10_27
sketch_2025_10_26
sketch_2025_10_25
sketch_2025_10_24
WIP
sketch_2025_10_23
Exemplo feito durante o tutorial apresentado na #PythoBrasil2025 sobre #shapely e #trimesh com o mantenedor no py5, Jim!
sketch_2025_10_22
sketch_2025_10_21
sketch_2025_10_20
sketch_2025_10_19
sketch_2025_10_18
sketch_2025_10_17
sketch_2025_10_16
sketch_2025_10_15
sketch_2025_10_14
sketch_2025_10_13
sketch_2025_10_12
sketch_2025_10_11
sketch_2025_10_10
sketch_2025_10_09
sketch_2025_10_08
sketch_2025_10_07
This was fun! Mutating L-System rules by randomly permutating symbols from “X” -> “F+[[X]-X]-F[-FX]+X”. Note that invalid rules break things, like when you have ] before [… More about L-Systems: https://github.com/villares/python-in-a-visual-context/blob/main/Processing-Python-py5/LSystem.md
See the rules in the the PNG names at the repo folder.
sketch_2025_10_06
sketch_2025_10_05
back to some nice polygons
sketch_2025_10_04
sketch_2025_10_03
sketch_2025_10_02
sketch_2025_10_01
sketch_2025_09_30
sketch_2025_09_29
sketch_2025_09_28
sketch_2025_09_27
sketch_2025_09_26
#shapely #viridis
sketch_2025_09_25
#shapely #viridis
sketch_2025_09_24
#shapely
sketch_2025_09_23
WIP
sketch_2025_09_22
#viridis
sketch_2025_09_21
sketch_2025_09_20
WIP
sketch_2025_09_19
sketch_2025_09_18
sketch_2025_09_17
sketch_2025_09_16
the cyclic #twilight #matplotlib #colormap https://matplotlib.org/stable/users/explain/colors/colormaps.html
sketch_2025_09_15
more #viridis
sketch_2025_09_14
I like the public domain AIGA pictogram for departures :)
sketch_2025_09_13
#veridis
sketch_2025_09_12
Using py5 #matplotlib #colormap integration: #viridis (https://www.youtube.com/watch?v=xAoljeRJ3lU)
sketch_2025_09_11
#numpy #shapley #trimesh #stenci
sketch_2025_09_10
sketch_2025_09_09
WIP
sketch_2025_09_08
sketch_2025_09_07
sketch_2025_09_06
sketch_2025_09_05
51 unique combinations of 3 triangles from a 3 x 3 grid, avoiding rotations.
sketch_2025_09_04
All the 197 ways of dividing a 3 x 3 grid with triangles, avoiding rotated configurations.
sketch_2025_09_03
WIP (broken rotation elimination implementation)
Fixed the next day!
sketch_2025_09_02
Probably not very efficient, but a lot of fun! It took about 30min to calculate all the 23903 nonoverlapping combinations of triangles on the 3x3, which then I filtered to get the 747 combinations that fill the square. #shapely
sketch_2025_09_01
All 76 possible triangles from connecting points of a 3x3 grid.
sketch_2025_08_31
225 ways of dividing a a 3x3 grid of points with 3, 4 and 5 triangles… #shapely
sketch_2025_08_30
7713 combinations of 4 triangles on a 3x3 grid. #shapely
sketch_2025_08_29
4304 non-overlapping triangle triplets form points on a 3x3 grid. #shapely
sketch_2025_08_28
sketch_2025_08_27
sketch_2025_08_26
sketch_2025_08_25
sketch_2025_08_24
sketch_2025_08_23
sketch_2025_08_22
sketch_2025_08_21
sketch_2025_08_20
sketch_2025_08_19
WIP: study for modeling Daniel Seda’s Modorituk modules.
sketch_2025_08_18
sketch_2025_08_17
sketch_2025_08_16
WIP
sketch_2025_08_15
sketch_2025_08_14
sketch_2025_08_13
sketch_2025_08_12
sketch_2025_08_11
sketch_2025_08_10
sketch_2025_08_09
Revisiting a sketch from 2021… fiddling a bit. Maybe tomorrow I’ll advance a bit.
sketch_2025_08_08
sketch_2025_08_07
Playing with an old sketch idea (also present in the Processing Video library examples) … Frame to glyph grid. I’m using py5, #OpenCV & #NumPy
sketch_2025_08_06
sketch_2025_08_05
#NumPy #OpenSimplexNoise #Loop “Noise walkers”
sketch_2025_08_04
WIP “Noise walkers” #OpenSimplexNoise
sketch_2025_08_03
More #trimesh studies… got back some missing edges, but also got one unwanted edge betweeen two co-planar faces.
sketch_2025_08_02
I found a problem with my nice #trimesh mesh drawing helper :(((
Single triangle “faces” dont have the edges listed on mesh.facets_boundary. So I miss drawing their edges.
sketch_2025_08_01
sketch_2025_07_31
sketch_2025_07_30
A quick #shapely & #py5 demo!
sketch_2025_07_29
#DebugAesthetic I think it worked…
sketch_2025_07_28
WIP, I think I found some trouble with colinear vertices! Also, I’m updating my https://abav.lugaralgum.com/arc_tangents_and_bezier_studies/ repo…
sketch_2025_07_27
sketch_2025_07_26
A #py5 multi-page #PDF export example (with a side dish of #shapely).
sketch_2025_07_25
sketch_2025_07_24
sketch_2025_07_23
sketch_2025_07_22
sketch_2025_07_21
sketch_2025_07_20
sketch_2025_07_19
sketch_2025_07_18
sketch_2025_07_17
#truchet
sketch_2025_07_16
sketch_2025_07_15
sketch_2025_07_14
sketch_2025_07_13
sketch_2025_07_13 [Folium]
A small #Folium example.
sketch_2025_07_12
#QueasyCam
sketch_2025_07_11
Eperimenting with #UrsinaEngine
sketch_2025_07_10
sketch_2025_07_09
sketch_2025_07_08
#trimesh #OpenSimplexNoise
sketch_2025_07_07
#trimesh
sketch_2025_07_06
Finally I made an arbitrary #trimesh “slab” I’ve been unsuccessfully thinking about doing for a while…
sketch_2025_07_05
I hate to calculate the index of vertices on an array for constructiong faces. So I ended up trying a dictionary with the indices… let’s see if this helps with my trimesh studies.
sketch_2025_07_04
sketch_2025_07_03
sketch_2025_07_02
Revisiting a 2018 sketch I like a lot… I should work on this a bit.
sketch_2025_07_01
sketch_2025_06_30
#AlanTuring #TuringPride #Pride
sketch_2025_06_29
sketch_2025_06_28
sketch_2025_06_27
sketch_2025_06_27 [Blender Geometry Nodes]
sketch_2025_06_26
Back to the #numpy based #flocking experiment based on Nicolas Rougier example in “From Pytnon to Numpy”
sketch_2025_06_25
sketch_2025_06_24
#FreeCAD example made during a class
sketch_2025_06_23
sketch_2025_06_22
Not very good WIP… I always struggle to make #trimesh 3D meshes from scratch with #numpy
sketch_2025_06_21
sketch_2025_06_20
sketch_2025_06_19
sketch_2025_06_18
sketch_2025_06_17
sketch_2025_06_16
sketch_2025_06_15
sketch_2025_06_14
sketch_2025_06_13
sketch_2025_06_12
sketch_2025_06_11
#shapely #trimesh
sketch_2025_06_10
A #trimesh example used in class yesterday!
sketch_2025_06_09
sketch_2025_06_08
sketch_2025_06_07
sketch_2025_06_06
sketch_2025_06_05
sketch_2025_06_04
sketch_2025_06_03
sketch_2025_06_02
sketch_2025_06_01
sketch_2025_05_31
sketch_2025_05_30
sketch_2025_05_29
sketch_2025_05_28
sketch_2025_05_27
sketch_2025_05_26
sketch_2025_05_25
sketch_2025_05_24
sketch_2025_05_23
sketch_2025_05_22
WIP
sketch_2025_05_21
WIP: reviewing my geometry helpers. Hatch polygon seems… broken.
sketch_2025_05_20
sketch_2025_05_19
Ome more PeasyCam + mouse selection
sketch_2025_05_18
sketch_2025_05_17
Zoom, pan and slick 3D orbit mouse interaction with insane ease, basically for free, with the PeasyCam library.
sketch_2025_05_16
sketch_2025_05_15
sketch_2025_05_14
sketch_2025_05_13
sketch_2025_05_12
One more “snub square tiling” #loop #animation :)
sketch_2025_05_11
sketch_2025_05_10
“snub square tiling”
sketch_2025_05_09
Work in progress on the “snub square tiling”
sketch_2025_05_08
Another take at animating “Cairo tiles” which I tried not long ago (actually in 2023…).
sketch_2025_05_07
sketch_2025_05_06
sketch_2025_05_05
Data from #geobr
sketch_2025_05_04
Still the Marius Watz inspitation… check the animated version
sketch_2025_05_03
heavily inspired by Marius Watz’s work I posted recently, from the Processing examples…
sketch_2025_05_02
sketch_2025_05_01
I needed to make the bodies KINEMATIC… It was a long time since I tried this I had forgoten all about the these.
sketch_2025_04_30
Broken! Maybe something in pymunk changed, I have to investigate! (I rotated the box bodies, the shapes are drawn rotated, but the geometry for the collisions seems not to be rotated…)
sketch_2025_04_29
sketch_2025_04_28
A small Pymunk example for class. No interactive segment-wall drawing for this one. And I can’t use pickle for this sketch in imported mode :( (see previous day for both features and the triangulated polys!)
sketch_2025_04_27
sketch_2025_04_26
sketch_2025_04_25
WIP
sketch_2025_04_24
sketch_2025_04_23
sketch_2025_04_22
sketch_2025_04_21
sketch_2025_04_20
sketch_2025_04_19
sketch_2025_04_18
sketch_2025_04_17
Yet another GOL…
sketch_2025_04_16
sketch_2025_04_15
sketch_2025_04_14
sketch_2025_04_13
sketch_2025_04_12
sketch_2025_04_11
sketch_2025_04_10
sketch_2025_04_09
sketch_2025_04_08
sketch_2025_04_07
sketch_2025_04_06
sketch_2025_04_05
sketch_2025_04_04
sketch_2025_04_03
sketch_2025_04_02
#LSystem
sketch_2025_04_01
sketch_2025_03_31
Done during class.
sketch_2025_03_30
sketch_2025_03_29
Trying to adapt an awesome zoom strategy from my dear friend @Introscopia@coletivos.org
sketch_2025_03_28
sketch_2025_03_27
sketch_2025_03_26
sketch_2025_03_25
Astronaut Eileen Collins
sketch_2025_03_24
sketch_2025_03_23
sketch_2025_03_22
sketch_2025_03_21
sketch_2025_03_20
sketch_2025_03_19
sketch_2025_03_18
sketch_2025_03_17
sketch_2025_03_16
sketch_2025_03_15
sketch_2025_03_14
sketch_2025_03_13
sketch_2025_03_12
Work in progress… #OpenStreetMap data as usual #osmnx
sketch_2025_03_11
sketch_2025_03_10
sketch_2025_03_09
sketch_2025_03_08
sketch_2025_03_07
sketch_2025_03_06
Collage from “Mercado Municipal (São Paulo)” by Wilfredo Rafael Rodriguez Hernandez (Wilfredor) https://commons.wikimedia.org/wiki/File:Mercado_Municipal_(S%C3%A3o_Paulo)_16.jpg Creative Commons Attribution-Share Alike 4.0 International license.
sketch_2025_03_05
Demo of raster clipping/masking with #py5 and #numpy.
sketch_2025_03_04
sketch_2025_03_03
sketch_2025_03_02
sketch_2025_03_01
sketch_2025_02_28
Domingo vai ter oficina de GIFs animados no Garoa… versão maior da animação
sketch_2025_02_27
sketch_2025_02_26
sketch_2025_02_25
Adding basic zoom and pan
sketch_2025_02_24
Poly data (c) OpenStreetMap contributors https://www.openstreetmap.org/copyright
sketch_2025_02_23
sketch_2025_02_22
sketch_2025_02_21
sketch_2025_02_21 [matplotlib]
sketch_2025_02_20
#ControlP5 example. This is a Processing Java library, but it can be used with py5 :)
sketch_2025_02_19
sketch_2025_02_18
sketch_2025_02_17
sketch_2025_02_16
#DelaunayTriangulations and #TravelingSalesmanProblem investigations with #SciPy can be in 3D too :)
sketch_2025_02_15
sketch_2025_02_14
sketch_2025_02_13
#SciPy.spatial #ConvexHull and #MinimalSpanningTree
sketch_2025_02_12
sketch_2025_02_11
#TravellingSalesmanProblem #MinimalSpanningTree #SciPy #graphs
sketch_2025_02_10
Naive “nearest neighbor” #TravelingSalesmanProblem aproximation with just #scipy, fast but crude. Maybe tomorrow I’ll try to implement something from a scientific paper on the problem, or maybe a naive genetic algorithm just for fun.
sketch_2025_02_09
#networkx #TSP approximation
sketch_2025_02_08
#MinimalSpanningTree #networkx
sketch_2025_02_07
#networkx #MinimumSpanningTree
sketch_2025_02_06
sketch_2025_02_05
sketch_2025_02_04
sketch_2025_02_03
sketch_2025_02_02
sketch_2025_02_01
Another #PixelSorting experiment I didn’t heve the energy to try yesterday, also from an earlier #OSNoise sketch idea + #NumPy.
sketch_2025_01_31
Using #numpy.sort on a variation of the previous sketch, animating a few frames, but the color compression is brutal :(
sketch_2025_01_30
sketch_2025_01_29
sketch_2025_01_28
Interactive OpenSimplexNoise based “infinite scroll” #genuary28 #genuary2025
sketch_2025_01_27
sketch_2025_01_26
sketch_2025_01_25
sketch_2025_01_24
sketch_2025_01_24 [p5js]
I’m too sad to make my own #genuary sketch because of news of Vamoss passing away. I decided to just tweak one of his openprocessing sketches, he loved that people could work on top of his code. We will miss him so much. His inspiring energy will live on.
sketch_2025_01_23
sketch_2025_01_22
sketch_2025_01_21
#genuary21
sketch_2025_01_20
#genuary20
sketch_2025_01_19
#genuary2025 #genuary19 Homage to Jesús Soto.
sketch_2025_01_18
A lazy rehash of a PyMunk sketch
sketch_2025_01_17
#genuary2025 #genuary17
sketch_2025_01_16
sketch_2025_01_15
#genuary2025 #genuary15
sketch_2025_01_14
#genuary2025 #genurary14
sketch_2025_01_13
sketch_2025_01_12
#genuary2025 #genuary12
sketch_2025_01_11
#Wolfram #genuary2025 #genuary11 I wanted to optimize with NumPy but couldn’t do much, the drawing part needs more work…
sketch_2025_01_10
#genuary2025 #genuary10 Tau is the only number contant… (based on genuary 8)
sketch_2025_01_09
I’d love to see Wolfram’s “rule 30” on my bus seats! #genuary9 #genuary2025
sketch_2025_01_08
4000 white points randomly selected from the volume of a sphere, rotated over the Y axis and redrawn 250 times. #genuary2025 #genuary8
sketch_2025_01_07
sketch_2025_01_07 [python]
#pyautogui #LibreOffice
sketch_2025_01_06
sketch_2025_01_05
sketch_2025_01_04
sketch_2025_01_03
The next day I think I improved it:
#genuary3 #genuary2025 “42 lines of code”
sketch_2025_01_02
#genuary2 #genuary2025 layers and layers.
sketch_2025_01_01
2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018
The sketch-a-day project, images and code repository, by Alexandre B A Villares are licensed under Attribution-NonCommercial-NoDerivatives 4.0 International , except if marked/attributed otherwise in a file or code section. Please contact for licensing questions.