20a

2019/sketch_190520a/gif_exporter.py

@@ -0,0 +1,40 @@
+"""
+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/
+
+# add at the start of your sketch:
+  add_library('gifAnimation')
+  from gif_exporter import gif_export
+# add at the end of draw():
+  gif_export(GifMaker)
+"""
+
+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=255,          # quality range 0 - 255
+               delay=200,            # 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)
+        
+    gifExporter.addFrame()
+
+    if frames == 0:
+       if keyPressed and key == "e":
+           finish = True
+                
+    if finish:
+        gifExporter.finish()
+        print("gif saved")
+        exit()

2019/sketch_190520a/sketch_190520a.pyde

@@ -0,0 +1,78 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+# More explorations of lines in grids
+
+from itertools import product, combinations, permutations, combinations_with_replacement
+from gif_exporter import gif_export
+add_library('GifAnimation')
+
+space = 20
+num_lines = 6
+
+
+def setup():
+    global line_combos, W, H, position, num
+    size(600, 600)
+    frameRate(5)
+    rectMode(CENTER)
+    strokeWeight(1)
+    # grid = product(range(-1, 2), repeat=2) # 3X3
+    grid = product(range(-2, 2), repeat=2) # 4X4
+    lines = combinations(grid, 2)
+    short_lines = []
+    for l in lines:
+        (x0, y0), (x1, y1) = l[0], l[1]
+        if dist(x0, y0, x1, y1) <= sqrt(2):
+            short_lines.append(l)
+    print(len(short_lines))
+    line_combos = list(combinations(short_lines, num_lines))
+    num = len(line_combos)
+    W, H = (width - space) / space, (height - space) / space
+    position = 0
+    print(W, H)
+
+
+def draw():
+    global position
+    colorMode(RGB)
+    background(240)
+    fill(0)
+    textSize(24)
+    text(str(num), space, height - space/4)
+    i = position
+    for y in range(H):
+        for x in range(W):
+            if i < len(line_combos):
+                pushMatrix()
+                translate(space + space * x, space + space * y)
+                draw_combo(i)
+                popMatrix()
+                i += 1
+    if i < len(line_combos):
+        # gif_export(GifMaker, SKETCH_NAME + "-" +  str(num))
+        position += W
+
+def draw_combo(i):
+    colorMode(RGB)
+    siz = space / 4
+    for i, sl in enumerate(line_combos[i]):
+        colorMode(HSB)
+        # stroke(i * 32, 200, 200)
+        (x0, y0), (x1, y1) = sl[0], sl[1]
+        line(x0 * siz, y0 * siz, x1 * siz, y1 * siz)
+
+def keyPressed():
+    if key == "s":
+        saveFrame("####.png")
+        
+def settings():
+    from os import path
+    global SKETCH_NAME
+    SKETCH_NAME = path.basename(sketchPath())
+    OUTPUT = ".gif"
+    println(
+        """
+![{0}]({2}/{0}/{0}{1})
+
+[{0}](https://github.com/villares/sketch-a-day/tree/master/{2}/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+""".format(SKETCH_NAME, OUTPUT, year())
+    )