Update sketch_2020_05_24a.pyde

2020/sketch_2020_05_24a/sketch_2020_05_24a.pyde

@@ -1,6 +1,7 @@
 # Exploring https://easings.net/
 # https://gist.github.com/zeffii/c1e14dd6620ad855d81ec2e89a859719
 i = 0
+easing_func = []
 
 def setup():
     size(600, 400)
@@ -8,24 +9,16 @@ def setup():
     strokeWeight(5)
     stroke(255)
     colorMode(HSB)
-    global easing
-    easing = (
-        CubicEaseIn, QuadraticEaseIn,
-        SineInOut, QuadraticEaseInOut,
-        CubicEaseInOut, ExponentialInOut,
-        QuadraticEaseOut, CubicEaseOut,
-    )
     f = createFont("DejaVu Sans Mono Bold", 24)
     textFont(f)
     draw_name()
 
-        
 def draw():
     global i
     w = 480
     x = (2 * frameCount) % w + 3
     t = map(x, 0, w, 0, 1)
-    y = height - height * easing[i](t)
+    y = height - height * easing_func[i](t)
     
     stroke(i * 32, 255, 255)
     point(x, y)
@@ -40,34 +33,36 @@ def draw():
         fill(0)
         noStroke()
         circle(width - 50, 0, 100)
-        i = (i + 1) % len(easing)
+        i = (i + 1) % len(easing_func)
         delay(500)
         draw_name()
+        if i == 0: noLoop()
 
+def register(lst):
+    def deco(f):
+        lst.append(f)
+        return f
+    return deco
 
-def QuadraticEaseOut(p):
-    return -(p * (p - 2))
+@register(easing_func)
+def CubicEaseIn(p):
+    return p * p * p
 
+@register(easing_func)
 def QuadraticEaseIn(p):
     return p * p
 
+@register(easing_func)
+def SineInOut(p):
+    return -(cos(PI * p) - 1) / 2
+
+@register(easing_func)
 def QuadraticEaseInOut(p):
     if p < 0.5:
         return 2 * p * p
     return (-2 * p * p) + (4 * p) - 1
 
-def SineInOut(p):
-    return -(cos(PI * p) - 1) / 2
-
-def ExponentialInOut(p):
-    if p == 0.0 or p == 1.0:
-        return p
-    if p < 0.5:
-        return 0.5 * pow(2, (20 * p) - 10)
-    else:
-        return -0.5 * pow(2, (-20 * p) + 10) + 1
-
-
+@register(easing_func)
 def CubicEaseInOut(p):
     """
     y = (1/2)((2x)^3)       ; [0, 0.5)
@@ -79,9 +74,20 @@ def CubicEaseInOut(p):
         f = ((2 * p) - 2)
         return 0.5 * f * f * f + 1
 
-def CubicEaseIn(p):
-    return p * p * p
+@register(easing_func)
+def ExponentialInOut(p):
+    if p == 0.0 or p == 1.0:
+        return p
+    if p < 0.5:
+        return 0.5 * pow(2, (20 * p) - 10)
+    else:
+        return -0.5 * pow(2, (-20 * p) + 10) + 1
 
+@register(easing_func)
+def QuadraticEaseOut(p):
+    return -(p * (p - 2))
+
+@register(easing_func)
 def CubicEaseOut(p):
     #  y = (x - 1)^3 + 1
     f = (p - 1)
@@ -95,5 +101,6 @@ def draw_name():
     textSize(18)
     text(easing[i].__name__, 28, 40)
 
-def keyPressed():
+def keyPressed(): 
     background(0)
+    loop()