4, 5, 6

2022/sketch_2022_10_06/sketch_2022_10_06.py

@@ -0,0 +1,95 @@
+import random  # sample, shuffle, seed
+
+nodes = {}
+unvisited_nodes = []
+
+EVN_NBS = ((0, 1), (0, -1), (-1, 0), (1, 0), (-1, -1), (1, -1))
+ODD_NBS = ((0, 1), (0, -1), (-1, 0), (1, 0), (-1,  1), (1,  1))
+SIN_60 = sqrt(3) / 2  # sin(radians(60))
+W = 30
+H = SIN_60 * W 
+OX, OY = W / 2, H / 2  # deslocamento (offset)
+
+def setup():
+    size(900, 900)
+    no_fill()
+    start(2022)
+
+def start(s):
+    global rnd_seed
+    rnd_seed = s
+    random.seed(s)
+    nodes.clear()
+    unvisited_nodes[:] = []
+    for _ in range(6):
+        i, j = random.randint(-12, 12), random.randint(-12, 12)
+        nodes[(i, j)] = (i, j, 0)
+        unvisited_nodes.append((i, j))
+    
+
+def draw():
+    background(240)
+    translate(width / 2, height / 2)
+    for n, v in nodes.items():
+        ia, ja = n
+        ib, jb, gen = v
+        w = W * sqrt(gen + 1) / sqrt(W)
+        stroke(0)
+        xa, ya = ij_to_xy(ia, ja)
+        xb, yb = ij_to_xy(ib, jb)
+        fill(0, 255 - w * 15)
+        if gen % 2:
+            stroke_weight(2)
+            line(xa, ya, xb, yb)
+            circle(xa, ya, 3)
+            circle(xb, yb, 3)
+        stroke_weight(1)
+        hexagon(xa, ya, w)
+        #fill(255, 0, 0)
+        #text(gen, xa, ya)
+    grow()
+
+def ij_to_xy(i, j):
+    if i % 2 == 0:
+        y = j * H  + OY
+    else:
+        y = j * H + H / 2 + OY
+    x = i * W * 3 / 4 + OX
+    return x, y
+
+def grow():
+    new_nodes = []
+
+    for n, (i, j) in enumerate(unvisited_nodes):
+        nbs = EVN_NBS if i % 2 == 0 else ODD_NBS
+        _, _, gen = nodes[(i, j)]
+        random.seed(min(6, n) + gen // 10)
+        xnbs = random.sample(nbs, 4)
+        random.shuffle(xnbs)
+        for ni, nj in xnbs:
+            ini, jnj= i + ni, j + nj
+            if (ini, jnj) not in nodes and visible(ini, jnj):
+                nodes[(ini, jnj)] = (i, j, gen + 1)
+                new_nodes.append((ini, jnj))
+    unvisited_nodes[:] = new_nodes
+    
+def visible(i, j):
+    x, y = ij_to_xy(i, j) 
+    return (abs(x) < width / 2 - W * 2 and
+            abs(y) < height / 2 - W * 2)
+
+def key_pressed():
+    if key == ' ':
+        print(frame_count)
+        start(frame_count)
+    elif key == 's':
+        save_frame(f'{rnd_seed}.png')
+
+def hexagon(xo, yo, r):
+    with begin_closed_shape(): # começa a desenhar a forma
+        for i in range(6):
+            ang = i * TWO_PI / 6 
+            x = xo + cos(ang) * r
+            y = yo + sin(ang) * r 
+            vertex(x, y)
+     

README.md

@@ -27,6 +27,30 @@ Here are listed some of the tools I have been using:
 
 ---
 
+### sketch_2022_10_06
+
+![sketch_2022_10_06](2022/sketch_2022_10_06/sketch_2022_10_06.png)
+
+[sketch_2022_10_06](https://github.com/villares/sketch-a-day/tree/main/2022/sketch_2022_10_06) [[py5](https://py5coding.org/)]
+
+---
+
+### sketch_2022_10_05
+
+![sketch_2022_10_05](2022/sketch_2022_10_05/sketch_2022_10_05.png)
+
+[sketch_2022_10_05](https://github.com/villares/sketch-a-day/tree/main/2022/sketch_2022_10_05) [[py5](https://py5coding.org/)]
+
+---
+
+### sketch_2022_10_04
+
+![sketch_2022_10_04](2022/sketch_2022_10_04/sketch_2022_10_04.jpg)
+
+[sketch_2022_10_04](https://github.com/villares/sketch-a-day/tree/main/2022/sketch_2022_10_04) [[py5](https://py5coding.org/)]
+
+---
+
 ### sketch_2022_10_03
 
 ![sketch_2022_10_03](2022/sketch_2022_10_03/sketch_2022_10_03.gif)