12

2025/sketch_2025_10_12/sketch_2025_10_12.py

@@ -0,0 +1,110 @@
+import py5
+import py5_tools
+
+axiom = "X"
+rules = {
+    'X': 'F+[[X]-X]-F[-FX]+X',
+    'F': 'FF'
+    }
+
+R = 'X'  # which rule to randomize
+
+step = 5
+#angle = 22.5
+iterations = 4  # repeticoes (voltas na aplicação das regraas)
+G = 6  # grid cols and rows
+W = 200  # grid width
+seqs = []
+
+def setup():
+    py5.size(600, 600, py5.P3D)
+    py5.color_mode(6, 'magma', 255) # py5.CMAP, py5.mpl_cmaps.VIRIDIS, 255 (alpha range)
+    py5.text_align(py5.CENTER, py5.TOP)
+    py5.text_size(12)
+    py5.fill('gray')
+    py5.random_seed(1)
+    generate_all()
+    py5_tools.animated_gif('out_.gif', frame_numbers=range(1, 91), duration=0.15)
+
+def generate_all():
+    seqs.clear()
+    for k in range(G * G):
+        rules = new_rules()
+        seqs.append(generate())
+        
+def generate():
+    starting_sequence = axiom
+    for i in range(iterations):
+        sequence = ""
+        for symbol in starting_sequence:
+            sequence += rules.get(symbol, symbol)
+        starting_sequence = sequence
+    return sequence
+
+def draw():
+    global angle
+    angle = -90 + py5.frame_count * 2
+    py5.background(float('NaN'))
+    k = 0
+    for i in range(G):
+        x = i * W
+        for j in range(G):
+            y = j * W
+            draw_sequence(seqs[k], x + W / 2, y + 3 * W / 4)
+            py5.text(rules[R], x + W / 2, y + W * 0.95)
+
+            k += 1
+            
+def draw_sequence(sequence, x, y):
+    with py5.push_matrix():
+        py5.translate(x, y)
+        #py5.rotate_y(py5.radians(py5.frame_count * 8))
+        for i, symbol in enumerate(sequence):
+            if symbol == "F":
+                py5.stroke(i / len(sequence) * 255)
+                py5.line(0, 0, 0, -step)  # desenha uma linha
+                py5.translate(0, -step)   # move a origem 
+            if symbol == "+":
+                py5.rotate(py5.radians(angle))
+                py5.rotate_y(py5.radians(angle))
+            if symbol == "-":
+                py5.rotate(py5.radians(-angle))
+                py5.rotate_y(py5.radians(-angle))
+            if symbol == "[":
+                py5.push_matrix()  # grava o estado (posição e ângulo)
+            if symbol == "]":
+                py5.pop_matrix()   # volta ao último estado gravado
+            if symbol == '0':
+                with py5.push_style():
+                    py5.fill(255 - i / len(sequence) * 255)
+                    py5.no_stroke()
+                    py5.circle(0, 0, step / 2)
+
+def key_pressed():
+    if py5.key == ' ':
+        generate_all()
+    elif py5.key == 's':
+        py5.save_frame(f'###.png')
+        
+def new_rules():
+    while True:
+        new_rule = ''.join(py5.random_permutation(rules[R]))
+        if check_rule(new_rule):
+            rules[R] = new_rule
+            break        
+    return rules
+        
+def check_rule(rule):
+    push_count = 0
+    for symbol in rule:
+        if symbol == '[':
+            push_count +=1
+        elif symbol == ']':
+            push_count -=1    
+        if push_count < 0:
+            return False
+    if push_count != 0: # This shouldn't be needed with permutations
+        return False    # that always have balanced [s and ]s.
+    return True
+
+py5.run_sketch(block=False)

docs/README.md

@@ -26,6 +26,16 @@ If you appreciate what I have been doing, you may also support my artistic work,
 <!-- SKETCHES_START -->
 
 
+---
+
+### sketch_2025_10_12
+
+![sketch_2025_10_12](https://raw.githubusercontent.com/villares/sketch-a-day/main/2025/sketch_2025_10_12/sketch_2025_10_12.gif)
+
+[sketch_2025_10_12](https://github.com/villares/sketch-a-day/tree/main/2025/sketch_2025_10_12) [[py5](https://py5coding.org/)]
+
+
+
 ---
 
 ### sketch_2025_10_11