190

README.md

@@ -6,6 +6,15 @@ Hi! I'm [Alexandre Villares](https://abav.lugaralgum.com), let's see if I can ma
 
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+
+---
+
+![s190](s190/s190b.gif)
+
+190: [code](https://github.com/villares/sketch-a-day/tree/master/s190) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+
+
 ---
 
 ![s189](s189/s189.gif)

s190/gif_export_wrapper.py

@@ -0,0 +1,38 @@
+"""
+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=128,          # quality range 0 - 255
+               delay=170,            # this is quick
+               finish=False):            # 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 finish:
+        gifExporter.finish()
+        print("gif saved")
+        del(gifExporter)
+ 

s190/s190.pyde

@@ -0,0 +1,67 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+SKETCH_NAME = "s190b"  # 20180707
+OUTPUT = ".gif"
+
+from gif_export_wrapper import *
+add_library('gifAnimation')
+
+num_hatches = 10
+hatches = []
+global_rot = 0
+
+def setup():
+    print_text_for_readme(SKETCH_NAME, OUTPUT)
+    size(500, 500, P3D)
+    # smooth(4)
+    for _ in range(num_hatches):
+        hatches.append(Hatch())
+
+def draw():
+    global global_rot
+    background(200)
+    stroke(0)
+    for i, h in enumerate(hatches):
+        h.plot(do_rotation = (frameCount/50 % num_hatches == i))
+
+    global_rot += 0.0628
+    
+    if frameCount % 2:
+        gif_export(GifMaker, filename=SKETCH_NAME)
+
+    if global_rot > PI * num_hatches:
+        gif_export(GifMaker, finish=True)
+        noLoop()
+
+
+class Hatch:
+
+    def __init__(self):
+        self.n = int(random(20, 60))
+        self.space = random(5, 15)
+        self.half = self.n * self.space / 2.
+        self.x = random(self.half, width - self.half)
+        self.y = random(self.half, height - self.half)
+        self.rot = random(TWO_PI)
+
+    def plot(self, do_rotation):
+        with pushMatrix():
+            translate(self.x, self.y)
+            rotate(self.rot)
+            if do_rotation:
+                rotateX(global_rot)
+                rotateZ(global_rot)
+            s, l = self.space, self.half
+            #ellipse(0, 0, 5,5)
+
+            for i in range(self.n):
+                line(s * i - l, -l, s * i - l, l)
+
+
+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)
+    )