Create sketch_2020_04_17a.pyde

2020/sketch_2020_04_17a/sketch_2020_04_17a.pyde

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+"""
+"Based on traditional Japanese stitching,
+this is a riff on hitomezashi patterns." Annie Perikins @anniek_p
+https://twitter.com/anniek_p/status/1244220881347502080?s=20
+"""
+from random import choice
+
+tam = 10
+mtm = tam / 2  # meio tamanho
+grid = dict()
+
+def setup():
+    global cols, rows
+    size(400, 400)
+    cols, rows = width / mtm - 1, height / tam
+
+def init():
+    for y in range(rows):
+        on = choice((True, False))
+        for x in range(cols):
+            if x % 2 == 1:
+                if x % 4:
+                    on = not on
+                grid[(x, y)] = on
+    for x in range(cols):
+        on = choice((True, False))
+        for y in range(rows):
+            if x % 2 == 0:
+                on = not on
+                grid[(x, y)] = on
+
+def ngbs(x, y):
+    nbs = []
+    if x % 2 == 0:
+        nb_list = ((-1, 0), (-1, 1), (1, 0), (1, 1))
+    else:     
+        nb_list = ((-1, 0), (-1, -1), (1, 0), (1, -1))
+    for nx, ny in nb_list:
+        nb = x + nx, y + ny
+        if grid.get(nb, 'no') != 'no':
+            nbs.append.(nb)
+            
+def draw():
+    background(200)
+    noLoop()
+    init()
+
+    for i in range(cols):
+        x = i * mtm + mtm
+        for j in range(rows):
+            y = j * tam + mtm
+            nbs = ngbs(i, j)
+            if dist(x, y, mouseX, mouseY) < tam:
+                for n in nbs:
+                    ni, nj = n
+                    nx =  ni * mtm + mtm
+                    ny =  nj * tam + mtm
+                    circle(nx, ny, 4)
+                    
+            
+            if grid[(i, j)]:
+                if i % 2 == 0:
+                    line(x, y - mtm, x, y + mtm)
+                else:
+                    line(x - mtm, y - mtm, x + mtm, y - mtm)
+
+
+def mouseReleased():
+    loop()
+    saveFrame("####.png")