26

2025/sketch_2025_01_26/sketch_2025_01_26.py

@@ -0,0 +1,57 @@
+from shapely import Polygon
+import py5
+
+def setup():
+    py5.size(600, 600)
+    start()
+
+def start():
+    global ps
+    crossing = True
+    while crossing:
+        pts_a = [(py5.random_int(1, 20) * 10,
+                  py5.random_int(1, 20) * 10) 
+                  for _ in range(5)]
+        pts_b = [(y, -x) for x, y in pts_a]
+        pts = pts_a + pts_b
+        p = Polygon(pts)
+        p_mirror = Polygon([(-x, y) for x, y in pts])
+        p_mirror = p_mirror.union(p)
+        crossing = not p_mirror.is_simple
+    ps = [p_mirror]
+
+def draw():
+    py5.background(230, 240, 240)
+    py5.translate(py5.width / 2, py5.height / 2)
+    py5.no_fill()
+    for p in ps:
+        py5.shape(py5.convert_cached_shape(p))
+
+def shrink():
+    p = ps[-1]
+    new_p = p.buffer(-10, cap_style='round')
+    print(new_p.area)
+    while new_p.area > 0:
+        ps.append(new_p)
+        new_p = ps[-1].buffer(-10, cap_style='round')
+
+def grow():
+    p = ps[-1]
+    new_p = p.buffer(10, cap_style='round')
+    print(new_p.area)
+    while new_p.area < 1000000:
+        ps.append(new_p)
+        new_p = ps[-1].buffer(10, cap_style='round')
+
+
+def key_pressed():
+    if py5.key == 's':
+        py5.save_frame('out###.png')
+    elif py5.key == ' ':
+        start()
+    elif py5.key == 'a':
+        shrink()
+    elif py5.key == 'z':
+        grow()
+
+py5.run_sketch(block=False)

docs/README.md

@@ -21,6 +21,16 @@ If you appreciate what I have been doing, you may also support my artistic work,
 2025 \| [<b>2024</b>](2024.md) \| [<b>2023</b>](2023.md) \| [<b>2022</b>](2022.md) \| [<b>2021</b>](2021.md) \| [<b>2020</b>](2020.md) \| [<b>2019</b>](2019.md) \| [<b>2018</b>](2018.md) 
 
 
+---
+
+### sketch_2025_01_26
+
+![sketch_2025_01_26](https://raw.githubusercontent.com/villares/sketch-a-day/main/2025/sketch_2025_01_26/sketch_2025_01_26.gif)
+
+[sketch_2025_01_26](https://github.com/villares/sketch-a-day/tree/main/2025/sketch_2025_01_26) [[py5](https://py5coding.org/)]
+
+
+
 ---
 
 ### sketch_2025_01_25