20

2024/sketch_2024_11_20/sketch_2024_11_20.py

@@ -0,0 +1,104 @@
+import py5
+
+from py5 import Py5Vector as Vector
+
+SQRT2 = py5.sqrt(2)
+
+shapes = []
+
+star_side = 20.2
+
+
+def setup():
+    global current_pos, heading
+    py5.size(500, 500)
+    py5.background(0)
+    py5.no_stroke()
+    py5.color_mode(py5.HSB)
+
+    current_pos = Vector(0, 0)
+    heading = 0
+    octagon_side = star_side * 2 + star_side * SQRT2
+
+    forward(-star_side * SQRT2 / 2)
+    turn(-90)
+    forward(octagon_side / 2)
+    set_heading(0)
+    #star = []
+    for i in range(16):
+        #star.append(current_pos)
+        if i % 2 == 0:
+            turn(-45)
+            shapes.append(square_pts(star_side))
+        else:
+            turn(90)
+            shapes.append(triangle_pts(octagon_side / SQRT2))
+        forward(star_side)
+    #shapes.insert(0, star)
+    forward(-star_side)
+    turn(-90)
+    forward(octagon_side / SQRT2)
+
+    ow = octagon_side + 2 * octagon_side / SQRT2
+    for i in range(4):
+        x = i * ow
+        for j in range(4):
+            y = j * ow
+            with py5.push_matrix():
+                py5.translate(x, y)
+                for i, shp in enumerate(shapes):
+                    #py5.fill((255 - i * 32) % 255, 200, 200)
+                    py5.fill((i * 8) % 255, 200, 200)
+                    draw_poly(shp)
+
+    py5.save(__file__[:-3] + '.png')
+
+def forward(d):
+    global current_pos
+    current_pos = current_pos.copy + (Vector.from_heading(heading) * d)
+
+def set_heading(deg):
+    global heading
+    heading = py5.radians(deg)
+
+def turn(deg):
+    global heading
+    heading += py5.radians(deg)
+
+def draw_poly(pts):
+    with py5.begin_closed_shape():
+        py5.vertices(pts)
+
+def triangle_pts(d):
+    s = (d * SQRT2) / (2 + SQRT2) 
+    pts = []
+    pts.append(current_pos)
+    turn(-90)
+    forward(d)
+    pts.append(current_pos)
+    turn(-90-45)
+    forward(s)
+    pts.append(current_pos)
+    turn(-45)
+    forward(s)
+    pts.append(current_pos)
+    turn(90)
+    forward(s)
+    pts.append(current_pos)
+    turn(-45)
+    forward(s)
+    pts.append(current_pos)
+    turn(-90-45)
+    forward(d)
+    return pts
+
+def square_pts(d):
+    pts = []
+    for _ in range(4):
+        pts.append(current_pos)
+        forward(d)
+        turn(90)
+    return pts
+
+py5.run_sketch(block=False)
+

docs/README.md

@@ -30,6 +30,16 @@ Here are listed some of the tools I have been using more recently:
 2024 \| [<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_2024_11_20
+
+![sketch_2024_11_20](https://raw.githubusercontent.com/villares/sketch-a-day/main/2024/sketch_2024_11_20/sketch_2024_11_20.png)
+
+[sketch_2024_11_20](https://github.com/villares/sketch-a-day/tree/main/2024/sketch_2024_11_20) [[py5](https://py5coding.org/)]
+
+
+
 ---
 
 ### sketch_2024_11_19