s322

s322/arcs.py

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+ROTATION = {0 : 0,
+            BOTTOM : 0,
+            DOWN : 0,
+            1 : HALF_PI,
+            LEFT : HALF_PI,
+            2 : PI,
+            TOP : PI,
+            UP : PI,
+            3 : PI + HALF_PI,
+            RIGHT: PI + HALF_PI,
+            BOTTOM + RIGHT : 0,
+            DOWN + RIGHT : 0,
+            DOWN + LEFT : HALF_PI,
+            BOTTOM + LEFT : HALF_PI,
+            TOP + LEFT : PI,
+            UP + LEFT : PI,
+            TOP + RIGHT: PI + HALF_PI,
+            UP + RIGHT: PI + HALF_PI,
+            }
+    
+def quarter_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], HALF_PI)
+
+def half_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], PI)
+
+def circle_arc(x, y, radius, start_ang, sweep_ang):
+    arc(x, y, radius * 2, radius * 2, start_ang, start_ang + sweep_ang)

s322/node.py

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+from random import choice
+from arcs import quarter_circle, half_circle, circle_arc
+
+class Node():
+    nodes = []
+ 
+    def __init__(self, x, y):
+        self.x = Node.border + Node.spacing / 2 + x * Node.spacing - width / 2
+        self.y = Node.border + Node.spacing / 2 + y * Node.spacing - height / 2
+        self.size_ = 1
+        self.rot0 = choice((0, HALF_PI)) #, PI, PI + HALF_PI))
+        self.rot1 = choice((HALF_PI , PI)) #, PI + HALF_PI))
+        self.type = choice(("a", "b", "c"))
+        
+    def plot(self, ang):
+        """ draws node """
+        with pushMatrix():
+            translate(self.x, self.y)
+            d = abs(self.rot0 + ang - self.rot1)
+            if d >= 0.30:
+                rotate(self.rot0 + ang)
+            else:
+                self.rot0 = self.rot1 - ang
+                rotate(self.rot1)    
+            noFill() #stroke(0)
+            siz = Node.spacing * self.size_
+            l = siz / 2.
+            a = l / 2. - 1
+            c = l / 2. + 1
+            # stroke(0, 0, 200, 50)
+            # rect(0, 0, siz, siz)
+            stroke(0, 100, 100)
+            for i in range(-5, 6, 5): # (-28, 29, 7):
+                if self.type == "a":
+                    quarter_circle(l, l, c + i, TOP + LEFT)
+                    quarter_circle(-l, -l, c + i, BOTTOM + RIGHT)                
+                    quarter_circle(-l, l, c + i, TOP + RIGHT)
+                    quarter_circle(l, -l, c + i, BOTTOM + LEFT) 
+                elif self.type == "b":
+                    half_circle(-l, 0, a + i, RIGHT)
+                    half_circle(l, 0, a + i, LEFT)                    
+                    half_circle(0, l, a + i, TOP)
+                    half_circle(0, -l, a + i, BOTTOM)
+                else:
+                    line(-l, a + i, l, a + i)
+                    line(a + i, -l, a + i, l)
+                    line(-l, -a + i, l, -a + i)
+                    line(-a + i, -l, -a + i, l)
+                
+
+    @classmethod                                            
+    def init_grid(cls, grid_size, border):
+        cls.border = border
+        cls.spacing = (width - cls.border * 2) / grid_size
+        cls.nodes = []
+        for x in range(grid_size):
+            for y in range(grid_size):
+                    new_node = cls(x, y)
+                    cls.nodes.append(new_node)
+
+    
+            

s322/s322.pyde

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+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+SKETCH_NAME = "s322" # 20181116
+OUTPUT = ".gif"
+
+GRID_SIZE = 10
+BORDER = 50
+
+from random import seed
+from random import choice
+from node import Node
+
+def setup():
+    size(500, 500)
+    strokeWeight(1)
+    rectMode(CENTER)
+    frameRate(10)
+    random_seed(101)
+    Node.init_grid(GRID_SIZE, BORDER)
+            
+def draw():
+    translate(width/2, height/2)
+    background(200)
+    ang = 0 #frameCount/31.
+        
+    for node in Node.nodes:
+        node.plot(ang)
+
+    if ang < TWO_PI:
+        pass
+        #saveFrame("###.png")
+    else:
+        noLoop()                                            
+ 
+def keyPressed():
+    if key == "n":
+        Node.init_grid(GRID_SIZE, BORDER)
+    if key == "s": saveFrame("###.png")
+    
+    
+def random_seed(s=None):
+    global rnd_seed
+    if s:
+        rnd_seed = s
+        seed(rnd_seed)
+        randomSeed(rnd_seed)    
+    else:
+        seed(rnd_seed)
+        randomSeed(rnd_seed)
+    
+# print text to add to the project's README.md             
+def settings():
+    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(SKETCH_NAME, SKETCH_NAME[1:], OUTPUT)
+    )