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2020/sketch_2020_03_21a/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_03_21a/sketch_2020_03_21a.pyde

@@ -0,0 +1,67 @@
+def setup():
+    size(1220, 400)
+    frameRate(10)
+
+def draw():
+    from random import seed
+    seed(1)
+    background(0)
+    for function in (grid, shuffled_grid, shoebot_shuffled):
+        g = make_a_grid(function, frameCount % 100)
+        plot_a_grid(g)
+        translate(410, 0)
+                        
+def plot_a_grid(a_grid):    
+    noStroke()
+    for x, y, s, c in a_grid:
+        fill(c)
+        ellipse(x, y, s, s)
+
+def shuffled_grid(cols, rows, colSize=1, rowSize=1):
+    from random import shuffle
+    sg = list(grid(cols, rows, colSize, rowSize))
+    shuffle(sg)
+    return sg
+
+def grid(cols, rows, colSize=1, rowSize=1):
+    """
+    Returns an iterator that contains coordinate tuples.
+    As seen in Shoebot & Nodebox (minus 'shuffled mode')
+    A common way to use is:
+    #    for x, y in grid(10, 10, 12, 12):
+    #        rect(x, y, 10, 10)
+    """
+    rowRange = range(int(rows))
+    colRange = range(int(cols))
+    for y in rowRange:
+        for x in colRange:
+            yield (x * colSize, y * rowSize)
+
+def shoebot_shuffled(cols, rows, colSize=1, rowSize=1):
+    from random import shuffle
+    rowRange = list(range(int(rows)))
+    colRange = list(range(int(cols)))
+    shuffle(rowRange)
+    shuffle(colRange)
+    for y in rowRange:
+        for x in colRange:
+            yield (x * colSize, y * rowSize)
+            
+def make_a_grid(grid_function, offset=50):  
+    colorMode(HSB)  
+    i = offset
+    a_grid = []
+    offset_x, offset_y = 20, 20 
+    for x, y in grid_function(10, 10, 40, 40):
+        c = color(i * 2.5 % 256, 255, 200)
+        s = 5 + abs(35 - (.7 * (i % 100)))
+        a_grid.append((x + offset_x, y + offset_y, s, c))
+        i += 1
+    return a_grid
+                                    
+def save_image():
+    from os import path
+    sketch = sketchPath()
+    filename = path.basename(sketch) + '.png'
+    saveFrame(filename)
+    print(filename + ' saved')

README.md

@@ -16,6 +16,13 @@ You may also support my artistic work, open educational resources and research u
 
 ## 2020
 
+
+---
+
+![sketch_2020_03_21a](2020/sketch_2020_03_21a/sketch_2020_03_21a.gif)
+
+[sketch_2020_03_21a](https://github.com/villares/sketch-a-day/tree/master/2020/sketch_2020_03_21a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
 ---
 
 ![sketch_2020_03_20a](2020/sketch_2020_03_20a/sketch_2020_03_20a.png)