9b

2020/sketch_2020_03_09b/sketch_2020_03_09b.pyde

@@ -0,0 +1,51 @@
+
+ens = []
+template = ((-1, -1), (-1, 1), (1, 1), (1, -1))
+
+def setup():
+    size(500, 500)
+    noFill()
+    strokeJoin(ROUND)
+    for _ in range(5):
+        ens.append(create_points())
+               
+def create_points():
+    pts = []
+    for x, y in template:
+        w = random(25, 75)
+        pts.append((x * w, y * w))
+    return pts
+
+def draw():
+    background(240)
+    translate(width / 2 - 50, height / 2)
+    offsets = ens[0]
+    for offset, pts in zip(offsets, ens[1:]):
+        pushMatrix()
+        translate(*offset)
+        for dx in range(10):
+            pts_copy = pts[:]
+            translate(10, 0)
+            fc = 5 * dx + frameCount
+            pts_copy[2] = lerpPoint(pts_copy[2],
+                                    pts_copy[3],
+                                    (1 + cos(fc/20.))/2)
+            plot_poly(pts_copy)
+        popMatrix()
+def lerpPoint(a, b, t):
+    c = [lerp(ea, eb, t) for ea, eb in zip(a, b)]
+    return c
+
+def plot_poly(points):
+    beginShape()
+    for p in points:
+        vertex(*p)
+    endShape(CLOSE)
+
+def keyPressed():
+    if key == ' ':
+        ens[:] = []
+        for _ in range(5):
+            ens.append(create_points())
+    if key == 's':
+        saveFrame("####.png")