sketch-a-day

one visual idea a day

2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018

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367: code [Py.Processing]

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… in preparation for something…

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357: code [Py.Processing]

Back to ideas from 322…

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A 3D take on 314

s315

315: GIF code [Py.Processing]

Horizontaly connected 314

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314: code [Py.Processing]

Isolating elements from 313

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Hatches parallel to opposed sides.

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Tried to supress some vertices from the hatch grid.

s300

300: code [Py.Processing]

Cross hatch and, a simplified “cell” polygon drawing and selective non-random verticies (if pos % 3 == 0)

s299

299: code [Py.Processing]

Inclined hatches

s298

298: code [Py.Processing]

First hatch attempt on a random “cell” grid. Each cell has 4 “node” vertices

s297

297: code [Py.Processing]

Changed my internal point grid to “pixels”

s296

296: code [Py.Processing]

Demo of how the “inside poly” test works from from my lines intersecting poly function.

s295

295: code [Py.Processing]

Testing if a point is inside a poly to make a grid/retucule. Advancing from my lines intersecting poly function.

s294

294: code [Py.Processing]

Playing with my code for lines intersecting polygons.

s293

293: code [Py.Processing]

The polygons now are non-self-intersecting, and the hatches are kept inside :) White lines in the background are from discarded random polys that self-intersected.

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True arcs and lines

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Ellipse arcs

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First attempt at joining rectangular cells into bigger polygonal faces.

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This sorts a gliph sequence from lighter to darker

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268: code[Py.Processing] & code[Pygame]

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This was kind of a dead end. It’s easy to rotate stuff with pushMatrix(), transtlate() and rotate(), but it doesn’t work inside beginShape() as I found out the next day.

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Animation

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Now (hollow) boxes, and a cutting-plane controlled by the keyboard.

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Tubes! Solid boxes hollowed in one of three directions.

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Two layer version. Added rotateX(rot).

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205: code [Py.Processing]

One layer version, I’ll use it to test some ideas another day.

s204

204: code [Py.Processing]

At each cycle, it starts on the next node.

s203

203: code [Py.Processing]

A big one, animated the maze generation process.

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A bigger one

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s186gif

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s180

    def set_nbs(self):
        self.nbs, self.unvisited_nbs = [], []
        for node in Node.nodes:
            if node != self and dist(node.x, node.y, node.z,
                                     self.x, self.y, self.z) <= Node.spacing * 1.1:
                self.nbs.append(node)
                self.unvisited_nbs.append(node)

s180b

if node != self and dist(node.x, node.y, node.z,
                         self.x, self.y, self.z) <= Node.spacing * 1.5:

180: code [Py.Processing]

s179COLOR

s179PB

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s171

171:Java code[Processing Java] & Python code [Py.Processing]

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169:code [Py.Processing]

Now same Z lines can form floors.

s168

168:code [Py.Processing]

No random movement in Z so no line connections between different (Z) levels. Comparing lines with different Zs to create translucent ‘walls’.

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167: Java code [Processing Java] & Python code [Py.Processing]

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(#152 revisited in 3D :)

s162

162: code [Processing Java]

Perlin Noise “walker” + ?

s161

161: code [Processing Java]

Perlin Noise “walker” + eye

s160

160: code [Processing Java]

Interactive genetic algorithm

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159: code [Processing Java]

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s140 + s141 + s142

140 + 141 + 142 code [Py.Processing]

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Revisiting ideas of recursion from s071

Heavy animated GIF: s138.gif

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s137: code [Py.Processing]

PDF: diagram.pdf

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Maybe I fixed it, I guess, not sure…

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BROKEN!

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To be brutally honest, I had no idea that reversing the second random grid would bring me this result!

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112: code [Py.Processing]

Hexagons!

```python def hexagon(x, y, r): with pushMatrix(): translate(x, y) beginShape() for i in range(6): vx = cos(i * TWO_PI /6) * r vy = sin(i * TWO_PI /6) * r vertex(vx, vy) endShape(CLOSE)

---

### s111

![s111](https://raw.githubusercontent.com/villares/sketch-a-day/main/2018/s111/s111.gif)

111: [code](https://github.com/villares/sketch-a-day/tree/master/2018/s111)  [Py.Processing]

Now I 'fixed' the rotation with propper pushMatrix() and translate()

​```python
        with pushMatrix():
            translate(x0,y0)
            rotate(fs0)
            stroke(st0)
            equilateral(0, 0, fs0)
        with pushMatrix():
            translate(x1,y1)
            rotate(fs1)
            stroke(st1)
            equilateral(0, 0, fs1)
        with pushMatrix():
            translate(x2,y2)
            rotate(fs2)
            stroke(st2)
            equilateral(0, 0, fs2)

s110

110: code [Py.Processing]

Just added some rotations to mess things up. It’s “wrong”, but I like it!

        rotate(fs0)
        stroke(st0)
        equilateral(x0, y0, fs0)
        stroke(st1)
        rotate(fs1)
        equilateral(x1, y1, fs1)
        stroke(st2)
        rotate(fs2)
        equilateral(x2, y2, fs2)

s109

109: code [Py.Processing]

colorMode(HSB)
...
C = color(map(final_size,-63 , 63, 0, 255), 255, 255)
                          

s108

108: code [Py.Processing]

colorMode(HSB)
...
C = color(map(abs(final_size), 0, 63, 0, 255), 255, 255)

s107

107: code [Py.Processing]

Inverting odd rows

  v = spac_size * 1.5
    h = spac_size * sqrt(3)
    for ix in range(-1, grid_elem + 1):
        for iy in range(-1, grid_elem + 1):
            if iy % 2:
                x = ix * h + h / 4
                es = elem_size
            else:
                x = ix * h - h / 4
                es = -elem_size
            y = iy * v
            for i in range(3):
                final_size = es * (i + 0.5)
                C = map(final_size, 0, 63, 0, 255)
                oX = rand_posi * random(-1, 1)
                oY = rand_posi * random(-1, 1)
                ELEMENTS.append((C, x + oX, y + oY, final_size))

s106

106: code [Py.Processing]

Lazy triangles

def equilateral(x, y, r):
    with pushMatrix():
        translate(x, y)
        triangle(-0.866 * r, -0.5 * r,
                  0.866 * r, -0.5 * r,
                  0.000 * r,  1.0 * r) 
                  # I know... 0 * r and 1 * r...

s105

105: code [Py.Processing]

Layers now have different “base” sizes (0.5, 1.5 and 2.5 times base size). Removed lines for now.

s104

104: code [Py.Processing]

Back to stroke variation

s103

103: code [Py.Processing]

Layers but only black strokes

    spac_size = width / (grid_elem + 1)
    v = spac_size * 1.5
    h = spac_size * sqrt(3)
    for ix in range(-1, grid_elem + 1):
        for iy in range(-1, grid_elem + 1):
            if iy % 2:
                x = ix * h + h / 4
            else:
                x = ix * h - h / 4
            y = iy * v
            for i in range(3):
                final_size = elem_size + rand_size * random(-1, 1)
                ELEMENTS.append((x, y, final_size))
    # three layers of elements            
    for i in range(3):
        offsetX = rand_posi * random(-1, 1)
        offsetY = rand_posi * random(-1, 1)
        for elem in ELEMENTS[i::3]:
            x, y, es = elem
            ellipse(x + offsetX, y + offsetY, es, es)

    for _ in range(grid_elem):
        x1, y1, es1 = rnd_choice(ELEMENTS)
        x2, y2, es2 = rnd_choice(ELEMENTS)
        line(x1, y1, x2, y2)

s102

102: code [Py.Processing]

    spac_size = width / (grid_elem + 1)
    v = spac_size * 1.5
    h = spac_size * sqrt(3)
    for ix in range(-1, grid_elem + 1):
        for iy in range(-1, grid_elem + 1):
            if iy % 2:
                x = ix * h + h / 4
            else:
                x = ix * h - h / 4
            y = iy * v
            final_size = elem_size + rand_size * random(-1, 1)
            offsetX = rand_posi * random(-1, 1)
            offsetY = rand_posi * random(-1, 1)
            C = map(final_size, 0, 63, 0, 255)
            ELEMENTS.append((C,
                             x + offsetX,
                             y + offsetY,
                             final_size
                             ))
    for elem in ELEMENTS:
        stroke1, x1, y1, es1 = elem
        ellipse(x1, y1, es1, es1)

    for _ in range(grid_elem):
        stroke1, x1, y1, es1 = rnd_choice(ELEMENTS)
        stroke2, x2, y2, es2 = rnd_choice(ELEMENTS)
        stroke(stroke2)
        line(x1, y1, x2, y2)

s101

101: code [Py.Processing]

    for _ in range(grid_elem * 2):        
        stroke1, x1, y1, es1 = rnd_choice(ELEMENTS)
        stroke(stroke1)
        ellipse(x1, y1, es1, es1)
        stroke2, x2, y2, es2 = rnd_choice(ELEMENTS)
        stroke(stroke2)
        # line
        ellipse(x2, y2, es2, es2)
        line(x1, y1, x2, y2)

s100

100: code [Py.Processing]

    spac_size = int(width / (grid_elem + 1))
    for _ in range(2):
        for x in range(spac_size / 2, width, spac_size): 
            for y in range(spac_size / 2, width, spac_size):
                final_size = elem_size + rand_size * random(-1, 1)
                offsetX = rand_posi * random(-1, 1)
                offsetY = rand_posi * random(-1, 1)
                C = map(final_size, 0, 63, 0, 255)
                ELEMENTS.append((C,
                                x + offsetX,
                                y + offsetY,
                                final_size
                                ))
    for stroke_c, x, y, el_size in ELEMENTS:
        stroke(stroke_c)
        ellipse(x, y, el_size, el_size)
    for _ in range(grid_elem):
        stroke_c, x1, y1, _ = rnd_choice(ELEMENTS)
        ________, x2, y2, _ = rnd_choice(ELEMENTS)
        stroke(stroke_c)
        line(x1, y1, x2, y2)

s099

099: code [Py.Processing]

    spac_size = int(width / (grid_elem + 1))
    for x in range(spac_size / 2, width, spac_size):  
        for y in range(spac_size / 2, width, spac_size): 
            final_size = elem_size + rand_size * random(-1, 1)
            offsetX = rand_posi * random(-1, 1)
            offsetY = rand_posi * random(-1, 1)
            GREY = map(final_size, 0, 63, 0, 255)
            stroke(GREY)
            ellipse(x + offsetX,  # desenha um círculo
                 y + offsetY,
                 final_size,
                 final_size)

s098

098: code [Py.Processing]

    spac_size = int(width / (grid_elem + 1))
    for x in range(spac_size / 2, width, spac_size):  
        for y in range(spac_size / 2, width, spac_size): 
            square_size = elem_size + rand_size * random(-1, 1)
            offsetX = rand_posi * random(-1, 1)
            offsetY = rand_posi * random(-1, 1)
            HUE = map(offsetX + offsetY, -128, 127, 0, 255)
            SAT = map(square_size, 0, 63, 0, 255)
            fill(HUE, SAT, 255, 200)
            rect(x + offsetX,  # desenha um quadrado
                 y + offsetY,
                 square_size,
                 square_size)

s097

097: code [Py.Processing]

    spac_size = int(width / (grid_elem + 1))
    for x in range(spac_size / 2, width, spac_size):
        for y in range(spac_size / 2, width, spac_size):
            # sorteia um tamanho (se o rand_size > 0)
            square_size = elem_size + rand_size * random(-1, 1)
            rect(x + rand_posi * random(-1, 1),  # desenha um quadrado
                 y + rand_posi * random(-1, 1),  
                 square_size,
                 square_size)

s096

096: code [Py.Processing]

More ‘Inputs’ helper changes (WASD & arrows for sliders). New GIF export helper actually works now! More lone nodes and edge creation changes…

s095

095: code [Py.Processing]

Complete rewrite of the ‘Inputs’ helper

# Ask user for Arduino port, uses slider if none is selected, use on `setup()`
global input
input = Input(Arduino)

# on `draw()`read analog pins 1, 2, 3, 4 or sliders
pot1 = input.analog(1)
pot2 = input.analog(2)
pot3 = input.analog(3)
pot4 = input.analog(4)

tilt = input.digital(13) # also triggered by [space bar]

# When on sliders, this draws them and checks mouse dragging / keystrokes
input.update()

s094

094: code [Py.Processing]

Connection ‘rate’ can be less than 1, prevents less than 2 nodes

s093

093: code [Py.Processing]

Nodes without connection are now removed

    COM_ARESTAS = set()  # para guardar pontos com aresta
    for aresta in Aresta.ARESTAS:
        if (aresta.p1 not in Ponto.SET) or (aresta.p2 not in Ponto.SET)\
                or (aresta.p1 is aresta.p2):  # arestas degeneradas
            Aresta.ARESTAS.remove(aresta)   # remove a aresta
        else:                # senão, tudo OK!
            aresta.desenha()  # desenha a linha
            aresta.puxa_empurra(TAM_ARESTA)  # altera a velocidade dos pontos
            # Adiciona ao conjunto de pontos com aresta
            COM_ARESTAS.update([aresta.p1, aresta.p2])
    Ponto.SET = COM_ARESTAS  # isto remove pontos sem nenhuma aresta
 

s092

092: code [Py.Processing]

Dynamic change of connection rate

if NUM_PONTOS * NUM_CONNECT > len(Aresta.ARESTAS):
        rnd_choice(list(Ponto.SET)).cria_arestas()
    elif NUM_PONTOS * NUM_CONNECT < len(Aresta.ARESTAS):
        Aresta.ARESTAS.remove(rnd_choice(Aresta.ARESTAS))

s091

091: code [Py.Processing]

Major rethink of my Arduino/Firmata code. I can now choose on start between sliders and potentiometers.

s090

090: code [Py.Processing]

Opaque strokes, no fill, randomized colours by column.

s089

089: code [Py.Processing]

X stroke now is translucent and grid elements have random colour inside grids.

s088

088: code [Py.Processing]

Filled rects, ellipses and losangles (without sktroke) and Xs

s087

087: code [Py.Processing]

No fill again, less colours. Variable/random number of elements per grid.

s086

086: code [Py.Processing]

Translucent fill & some stroke weight

s085

085: code [Py.Processing]

Some colour, and some crazy meddling with the Slider class…

s084

084: code [Py.Processing]

Make the grid’s position/origin align based on the spacing size (super- grid)

s083

083: code [Py.Processing]

Xs and rotated rectangles

s082

082: code [Py.Processing]

Squares and ellipses

s081

081: code [Py.Processing]

Let’s try some grids

s080

080: code [Py.Processing]

More arrows (black and white alternate by generation)

s079

079: code [Py.Processing]

Arrows (right black, left white)

s078

078: code [Py.Processing]

Color

s077

077: code [Py.Processing]

Random branch reduction is now less simmetric, and random seed changes on depth change.

s076

076: code [Py.Processing]

Stroke weight and some transparency

s075

075: code [Py.Processing]

… and slightly different parameters and recursion level control instead of lenght

s074

074: code [Py.Processing]

Adaptomg Shiffmans recusive Tree, with sliders or Pots…

s073

073: code [Py.Processing]

The code remains ugly :(

s072

072: code [Py.Processing]

Let’s mix some arrows?

s071

071: code [Py.Processing]

Thicker and with a saturation slider (no more scale offset)

s070

070: code [Py.Processing]

Thicker and with a saturation slider (no more scale offset)

s069

069: code [Py.Processing]

Added rotation.

s068

068: code [Py.Processing]

… and with sliders (by Peter Farell)

s067

067: code [Py.Processing]

Something else.

s066

066: code [Py.Processing]

Arrow grid networks can be sized and placed…

s065

065: code [Py.Processing]

Arrow grid networks are now objects…

s064

064: code [Py.Processing]

Revisiting yet an older graph, adding arrows…

s063

063: code [Py.Processing]

Revisiting an older graph adding arrows…

s062

062: code [Py.Processing]

+ and - keys control the distange/range of targes in 0.5 * SPACING increments

s061

061: code [Py.Processing]

Sometimes we have multiple arrows now out of each node…But I reduced the range (distance) they can point to.

s060

060: code [Py.Processing]

Complete Object Oriented refactor…

s059

059: code [Py.Processing]

Back to a list of points, now every point of the grid has a node. Limited points_to random each.

s058

058: code [Py.Processing]

Now with some deepcopy of changeable imutable namedtuples (containing mutable lists), and some lerp()

s057

057: code [Py.Processing]

Revisited 54 and now I’m re-selecting random points_to nodes…

s056

056: code [Py.Processing]

Arrow grid moving in HSB colour space

s055

055: code [Py.Processing]

Grid revisited

s054

054: code [Py.Processing]

New arrows! With a “Tail” parameter…

s053

053: code [Py.Processing]

Big invisible refactor (no more point-grid to select from, now a list of possible X and Y positons to choose). On the visible side, fewer elements, and non-pointing elements redrawn in red on top.

s052

052: code [Py.Processing]

White lines first, black arrows on top.

s051

051: code [Py.Processing]

Points now on a grid.

s050

050: code [Py.Processing]

Arrows now…

s049

049: code [Py.Processing] Yet more graphs

s048

048: code [Py.Processing] Yet more graphs

s047

047: code [Py.Processing] Yet more graphs

s046

046: code [Py.Processing] Yet more graphs

s045

045: code [Py.Processing] Yet more graphs

s044

044: code [Py.Processing] More graphs

s043

043: code [Py.Processing] More graphs

s042

042: code [Py.Processing] Yet another interactive recursive thingy, the image on the right is shown with a key pressed

s041

041: code [Py.Processing] Yet another interactive recursive thingy, the image on the right is shown with a key pressed

sketch_180209a

040

040: sketch_180209a [Py.Processing]

More recursion

sketch_180208

039

039: sketch_180208e [Py.Processing]

Manoloide inspired recursion

038sketch_180208d

038

038: sketch_180208d [Py.Processing]

Saskia Freeke inspired grid

sketch_180206a

037

037: sketch_180206b [Py.Processing] “Carnahacking is near!”

sketch_180205b

036

036: sketch_180205b [Py.Processing]

Added some mouse disturbance

sketch_180204b

035

035: sketch_180204b [Py.Processing] Preparing for “Carnahacking”

sketch_180203c

034

034: sketch_180203c [Py.Processing] Like 33 but again with “w squared” circles

sketch_180202c

033

033: sketch_180202c [Py.Processing] Like 32 but again with lines

sketch_180201c

032

032: sketch_180201c [Py.Processing] Like 29 but with moving points after the gesture is done

sketch_180131c

031

031: sketch_180130c [Py.Processing] Like 29 but with moving points after the gesture is done

sketch_180130c

030

030: sketch_180130c [Py.Processing] Like 29 but with 3D and PeasyCam orbit…

sketch_180129c

29c

029: sketch_180129c [Py.Processing] Like 27 but with circles

sketch_180128c

28c

028: sketch_180128c [Py.Processing] Like 27 but on grayscale

sketch_180127c

27c

027: sketch_180127c [Py.Processing]YouTube

Saving a list of points to animate colour… Mouse speed changes recorded colour & strokeWeight()

sketch_180126c

026: sketch_180126c [Py.Processing] Mouse speed changing colour & strokeWeight()

sketch_180125c

025c: sketch_180125b [Py.Processing] Mouse speed changing strokeWeight()

sketch_180124b

024b: sketch_180124b [Py.Processing] Maybe tomorrow I’ll try adding some sliders & movement to this graph ? [nah…]

sketch_180123b

023b: sketch_180123b [Py.Processing] Farrel’s Sliders adding random displacement

sketch_180122

022: missed :(

sketch_180121b

21b

021b: sketch_180121b [Py.Processing] Playing with Peter “Hacking Math Class” Farrel’s Sliders!

sketch_180120

20b

020b: sketch_180120b [Py.Processing] I was stuck on my DBN conversion sketch 20a, so this HSB shape play is 20b…

20a

020a: sketch_180120a [Py.Processing] Refactored the code generation, removed most of the repeated vertices… C D E G O R not nice yet…

sketch_180119a

19a

019: sketch_180119a [Py.Processing] DBN Letters: Now working on a new approach, generating vertex/Shape code, not there yet…

sketch_180118a

18a

018: sketch_180118a [Py.Processing] DBN Color font? Nah…

sketch_180117a

17a

017: sketch_180117a [Py.Processing] John Maeda’s dbnletters.dbn code from Design by Numbers on Processing Python Mode

sketch_180116a

16a

016: 16a [Py.Processing] Converting some Typography code from Design by Numbers, almost there!

sketch_180115a

15a

015: sketch_180115a [Py.Processing] Converting some Typography code from Design by Numbers, first trials

sketch_180114a

14a

014: sketch_180114a [Py.Processing] Another 3D Graph

s180113a

13a

013: s180113 [Py.Processing] 3D Graph

s180112

012: s180112 [Py.Processing] Another Graph Take

s180111

011: s180111 [Py.Processing] A Graph Take

s180110

010: s180110 [Py.Processing] More Manoloide inspired balls PNG (derived from a sketch by Manuel Gamboa Naon)

s180109

GIF

009: s180109 [Py.Processing] Balls for Manoloide GIF (derived from a sketch by Manuel Gamboa Naon)

s180108

GIF

008: s180108 [Py.Processing] Grid of Platonic Solids in Python Mode GIF

s180107

GIF

007: s180107 [Processing Java] Another grid of Platonic Solids in Java Mode GIF

s180106

GIF

006: s180106 [Processing Java] Grid of Platonic Solids in Java Mode GIF

005: s180105 [p5js] Line Tetrahedrons in p5*js - interactive

s180104

GIF

004: s180104 [Processing Java] Tetrahedrons in Java Mode- GIF

s180103

GIF

003: s180103 [Py.Processing] Tetrahedrons Python Mode- GIF

s180102

002: s180102 [Py.Processing] Many Stars 3D - YouTube

s180101

001: s180101[Py.Processing] Many Stars - YouTube (inspired by my own p5js Xmas & New Year card code)

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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.