153

README.md

@@ -8,6 +8,12 @@ If you enjoy this, make a small donation [here](https://www.paypal.com/cgi-bin/w
 
 ----
 
+![s153](s153/s153.gif)
+
+153: [code](https://github.com/villares/sketch-a-day/tree/master/s153) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+----
+
 ![s152](s152/s152.gif)
 
 152: [code](https://github.com/villares/sketch-a-day/tree/master/s152) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]

s153/gif_export_wrapper.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/jordanorelli)
+ported to Processing 3 by 01010101 (https://github.com/01010101)
+Download the library from https://github.com/01010101/GifAnimation/archive/master.zip
+This helper was inspired by an example by Art Simon https://github.com/APCSPrinciples/AnimatedGIF/
+
+Put  at the start of your sketch:
+   add_library('gifAnimation')
+   from gif_exporter import gif_export
+and 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=48,          # quality range 0 - 255
+               delay=170,            # this is quick
+               frames=0):            # 0 will stop on keyPressed or frameCount >= 100000
+    global gifExporter
+    try:
+        gifExporter
+    except NameError:
+        gifExporter = GifMaker(this, filename + ".gif")
+        gifExporter.setRepeat(repeat)
+        gifExporter.setQuality(quality)
+        gifExporter.setDelay(delay)
+        gif_export._frame = frameCount
+        print("gif start")
+
+    gifExporter.addFrame()
+
+    if (frames == 0 and keyPressed or frameCount - gif_export._frame >= 100000) \
+            or (frames != 0 and frameCount - gif_export._frame >= frames):
+        gifExporter.finish()
+        #background(255)
+        print("gif saved")
+        del(gifExporter)
+        noLoop()
+        return False
+    else:
+        return True

s153/s153.pyde

@@ -0,0 +1,73 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+SKETCH_NAME, OUTPUT = "s153", ".gif"  # 180602
+
+add_library('gifAnimation')
+from gif_export_wrapper import *
+
+GRID_SIZE = 30
+
+def setup():
+    size(500, 500)
+    background(0)
+    print_text_for_readme(SKETCH_NAME, OUTPUT)
+    border = 25
+    spacing = (width - border * 2) / GRID_SIZE
+    Ponto.spacing = spacing
+    a = 0
+    while a < TWO_PI:
+                x = cos(a) * spacing * 10
+                y = sin(a) * spacing * 10
+                Ponto.PONTOS.append(Ponto(width/2 + x, height/2 + y))
+                a += TWO_PI/60.
+    
+def draw():
+    #fill(200, 4)
+    #noStroke()
+    #rect(0, 0, width, height)
+    for p in Ponto.PONTOS:
+        p.update()
+    for p in Ponto.PONTOS:
+        p.plot()
+    #noLoop()
+
+    if  frameCount > 200 and frameCount % 2:
+        gif_export(GifMaker, frames=200, filename=SKETCH_NAME)
+
+class Ponto():
+    PONTOS = []
+
+    def __init__(self, x, y):
+        self.tx = int(random(100))
+        self.ty = int(random(100))
+        self.speed = 0.02
+        self.space = Ponto.spacing * 5
+        self.ox = x - self.space*noise(self.tx)
+        self.oy = y - self.space*noise(self.ty)
+
+    def update(self):
+        if frameCount > 300: rs = self.speed
+        else: rs = -self.speed
+        self.tx += rs
+        self.x = self.space*noise(self.tx)
+        self.ty += rs
+        self.y = self.space*noise(self.ty)
+        self.px = self.ox + self.x
+        self.py = self.oy + self.y
+
+    def plot(self):
+        for p in Ponto.PONTOS:
+            if p != self and dist(p.px, p.py,
+                                  self.px, self.py) < Ponto.spacing * 3:
+                if frameCount % 2:  # só desenha a linha um frame sim outro não
+                    colorMode(HSB)
+                    stroke(4 * (frameCount % 64), 255, 255)
+                    line(p.px, p.py, self.px, self.py)
+        
+def print_text_for_readme(name, output):
+    println("""
+![{0}]({0}/{0}{2})
+
+{1}: [code](https://github.com/villares/sketch-a-day/tree/master/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+""".format(name, name[1:], output)
+    )