7a

2021/sketch_2021_01_07a/sketch_2021_01_07a.pyde

@@ -0,0 +1,51 @@
+from itertools import product
+from random import sample, choice
+from villares.line_geometry import line_intersect
+
+MARGIN = 50
+SIZE = 100
+
+def setup():
+    size(500, 500)
+    prepare()
+
+def prepare():
+    global triangles
+    n = 12
+    grid = list(product(range(MARGIN, width - MARGIN + 1, SIZE), repeat=2))
+    points = sample(grid, n)
+    triangles = [(pa, points[i - 1], points[i - 2])
+                 for i, pa in enumerate(points)]
+
+def subdivide():
+    global triangles
+    new_triangles = []
+    for i, (pa, pb, pc) in enumerate(triangles):
+        mid_ab = midpoint(pa, pb)
+        mid_bc = midpoint(pc, pb)
+        mid_ac = midpoint(pa, pc)
+        new_triangles.append((pa, mid_ab, mid_ac))
+        new_triangles.append((pb, mid_bc, mid_ab))
+        new_triangles.append((pc, mid_bc, mid_ac))
+    triangles = new_triangles
+
+def midpoint(a, b):
+    return ((a[0] + b[0]) / 2,
+            (a[1] + b[1]) / 2)
+
+def draw():
+    clear()
+    for pa, pb, pc in triangles:
+        fill(255, 100)
+        stroke(255, 100)
+
+        triangle(pa[0], pa[1],
+                 pb[0], pb[1],
+                 pc[0], pc[1])
+
+
+def keyPressed():
+    if key == "r":
+        prepare()
+    elif key == "d":
+        subdivide()

README.md

@@ -26,6 +26,12 @@ Here are listed some of the tools I have been using:
 
 ---
 
+![sketch_2021_01_07a](2021/sketch_2021_01_07a/sketch_2021_01_07a.gif)
+
+[sketch_2021_01_07a](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_01_07a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+---
+
 ![sketch_2021_01_06a](2021/sketch_2021_01_06a/sketch_2021_01_06a.gif)
 
 [sketch_2021_01_06a](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_01_06a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]