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2020/sketch_2020_02_24a/sketch_2020_02_24a.pyde

@@ -30,8 +30,8 @@ def create_arrows():
 def draw():
     background(200)
     # stroke(h, 255, 200, 200)
-    rad = 100 + mouseX
-    m = mouseX / TAU 
+    rad = 100 + (mouseX / 10.) ** 2
+    m = PI / 2 + mouseX / 50. 
     start, sweep, thick = -PI - HALF_PI/2 + m/2, PI + HALF_PI - m, 50
     pushMatrix()
     translate(width / 2, height / 2 + rad)

2020/sketch_2020_02_25a/gif_animation_helper.py

@@ -0,0 +1,44 @@
+"""
+Alexandre B A Villares http://abav.lugaralgum.com - GPL v3 
+
+A helper for the Processing gifAnimation library https://github.com/extrapixel/gif-animation/tree/3.0
+Download from https://github.com/villares/processing-play/blob/master/export_GIF/unzip_and_move_to_libraries_GifAnimation.zip
+This helper was inspired by an example by Art Simon https://github.com/APCSPrinciples/AnimatedGIF/
+
+v2019_09_23
+
+# add at the start of your sketch:
+  add_library('gifAnimation')
+  from gif_animation_helper import gif_export
+# add at the end of draw():
+  gif_export(GifMaker, "filename")
+"""
+
+def gif_export(GifMaker,             # gets a reference to the library
+               filename="exported",  # .gif will be added
+               repeat=0,             # 0 makes it an "endless" animation
+               quality=100,          # quality range 0 - 255
+               delay=170,            # this is quick
+               frames=0,             # 0 will stop on keyPressed or frameCount >= 100000
+               finish=False):        # force stop
+    global gifExporter
+    try:
+        gifExporter
+    except NameError:
+        gifExporter = GifMaker(this, filename + ".gif")
+        gifExporter.setRepeat(repeat)
+        gifExporter.setQuality(quality)
+        gifExporter.setDelay(delay)
+        print("gif recording started")
+
+
+    gifExporter.addFrame()
+
+    if (frames == 0 and keyPressed and key == "e" or
+        frames != 0 and frameCount >= frames):
+        finish = True
+                
+    if finish:
+        gifExporter.finish()
+        print("gif saved, exit")
+        exit()

2020/sketch_2020_02_25a/sketch_2020_02_25a.pyde

@@ -1,4 +1,6 @@
-add_library('VideoExport')
+add_library('gifAnimation')
+from gif_animation_helper import gif_export
+
 from arcs import *
 
 many_arrows = []
@@ -16,12 +18,6 @@ def setup():
     for _ in range(3):
         many_arrows.append(create_arrows())
 
-    # global videoExport
-    # videoExport = VideoExport(this, "video.mp4")
-    # videoExport.setFrameRate(24)
-    # videoExport.startMovie()
-    frameRate(24)
-
 def create_arrows():
     arrows = []
     for _ in range(10):
@@ -39,31 +35,32 @@ def draw():
     ini_arrows, fin_arrows = many_arrows[i], many_arrows[i - 1]
     for a, b in zip(ini_arrows, fin_arrows):
         rad, start, sweep, thick, h = lerp_arrow(b, a, tt)
-        fill(h, 255, 200, 200)
+        fill(h, 255, 200, 150)
         stroke(0)
         strokeWeight(2)
         display_arrow(rad, start, sweep, thick)
         
-    noFill()
-    stroke(255)
-    strokeWeight(5)
-    rad, start, sweep, thick, _ = player_arrow        
-    display_arrow(rad, start, sweep, thick)
+    # noFill()
+    # stroke(255)
+    # strokeWeight(5)
+    # rad, start, sweep, thick, _ = player_arrow        
+    # display_arrow(rad, start, sweep, thick)
         
-    # videoExport.saveFrame()
-
-    t += (1 + width - t) / 300.
-    t = lerp(t, width, .5)
+    # t += (1 + width - t) / 300.
     print t
-    if t > width:
-        t += 1
-    if t > 3 * width:
+    if t <= width:
+        t = lerp(t, width + 1, .1)
+    elif t > width:
+        t += 2
+    if t > 1.5 * width:
         t = 0
         i = (i + 1) % 3
-        # if i == 0:
-        #     videoExport.endMovie()
-        #     exit()
-
+        if i == 0:
+            gif_export(GifMaker, finish=True)
+    if frameCount % 2:
+        gif_export(GifMaker, filename="c")
+    
+    
 def lerp_arrow(a, b, t):
     c = []
     for c_a, c_b in zip(a, b):
@@ -81,7 +78,7 @@ def random_arrow():
     d = -1 if random(100) >= 50 else 1
     return (int(random(height * 0.008, height * 0.08)) * 5,
             random(TWO_PI),  # start
-            random(TWO_PI),  # sweep
+            random(QUARTER_PI / 4, TWO_PI - QUARTER_PI / 4),  # sweep
             int(random(2, height / 50)) * 5 * d,  # thickness
             random(255),  # hue
             )