day 62!

s062/s062.pyde

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+"""
+sketch 62 180303 - Alexandre B A Villares
+https://abav.lugaralgum.com/sketch-a-day
+"""
+
+import random as rnd
+import copy as cp
+
+SPACING, MARGIN, RANGE = 50, 75, 1
+DRAWING = []  # drawing elements 'D_nodes'
+SAVE_FRAMES = False
+
+def setup():
+    size(600, 600)
+    rectMode(CENTER)
+    noFill()
+    create_drawing(DRAWING)
+
+def keyPressed():
+    global RANGE
+    if key == 'n':
+        create_drawing(DRAWING)
+    if key == 'b':
+        for node in DRAWING:
+            node.copy_target(-1, 1)  # target back to the first points
+    if key == '=' or key == "+":
+        RANGE += .5
+    if key == '-' and RANGE > 1:
+        RANGE -= .5
+
+def create_drawing(drawing):
+    """
+    clears the list of nodes and creates a a new drawing appending a
+    list of nodes/drawing elements: arrows, connecting lines and lonely nodes
+    """
+    drawing[:] = []
+    for x in range(MARGIN, 1 + width - MARGIN, SPACING):
+        for y in range(MARGIN, 1 + height - MARGIN, SPACING):
+            drawing.append(D_node(x, y, DRAWING))
+    for node in drawing:  # para cada elemento do drawing
+        node.randomize_target(0, RANGE * SPACING)  # set of random targets
+        node.copy_target(0, -1)   # backup of original targets
+        node.randomize_target(1, RANGE * SPACING)  # secondary set of random targets
+
+def draw():
+    background(200)
+    fc = frameCount % 300 - 150
+    if fc < 0:
+        fase = 0
+    elif 0 <= fc < 149:
+        fase = map(fc, 0, 149, 0, 1)
+    # and frameCount < 1050:  # add/remove 300 for longer/shorter
+    elif fc == 149:
+        fase = 0
+        for node in DRAWING:
+            node.copy_target(1, 0)
+            node.randomize_target(1, RANGE * SPACING)
+
+    # draws circles/'lines', non-arrows
+    for node in (n for n in DRAWING if not n.is_arrow):
+        node.plot(fase)
+    # draws arrows
+    for node in (n for n in DRAWING if n.is_arrow):
+        node.plot(fase)
+    if SAVE_FRAMES and not fc % 10:
+        saveFrame("####.tga")
+
+class D_node(object):
+
+    """ Drawing elements,  arrows or circles that might point to another element """
+
+    def __init__(self, x, y, drawing):
+        self.x = x
+        self.y = y
+        self.t_size = rnd.choice([5, 10, 15])    # t_size
+        self.s_weight = rnd.choice([1, 2, 3])    # s_weight
+        self.is_arrow = rnd.choice([True, False])
+        self.points_to = [[], [], []] # current targets, next targets, initial targets
+        self.drawing = drawing
+
+    def plot(self, amt, other=None):
+        strokeWeight(self.s_weight)
+        stroke(self.s_color(amt))
+        for other in self.points_now(amt):
+            if self.is_arrow:
+                seta(self.x, self.y, other.x, other.y,
+                     self.t_size, self.s_weight * 5, # shorten amount, head size
+                     rect, self.t_size) # tail func, tail size
+            else:
+                line(self.x, self.y, other.x, other.y)
+                ellipse(self.x, self.y, self.t_size, self.t_size)
+        if not other:
+            if self.is_arrow:
+                other = self
+                seta(self.x, self.y, other.x, other.y,
+                     self.t_size, self.s_weight * 5,
+                     rect, self.t_size)
+            else:
+                ellipse(self.x, self.y, self.t_size, self.t_size)
+
+    def randomize_target(self, index, range_times_spacing):
+        self.points_to[index][:] = []
+        for _ in range(3):
+            rnd_node = rnd.choice(self.drawing)
+            while dist(self.x, self.y, rnd_node.x, rnd_node.y) > range_times_spacing:
+                rnd_node = rnd.choice(self.drawing)
+            if (self.x, self.y) != (rnd_node.x, rnd_node.y) and random(10) < 5:
+                self.points_to[index].append(PVector(rnd_node.x, rnd_node.y))
+
+    def copy_target(self, origin, destination):
+        self.points_to[destination] = cp.deepcopy(self.points_to[origin])
+
+    def never_empty(self, points):
+        if not points:
+            return [PVector(self.x, self.y)]
+        else:
+            return points
+
+    def points_now(self, amt=0):
+        points = []
+        if amt == 0 or amt == 1:
+            return self.points_to[int(amt)]
+        else:
+            #for p0 in self.never_empty(self.points_to[0]):
+                p0 = self.never_empty(self.points_to[0])[0]   # not all interpolated arrows are shown
+                for p1 in self.never_empty(self.points_to[1]):
+                    points.append(PVector(lerp(p0.x, p1.x, amt),
+                                          lerp(p0.y, p1.y, amt)))
+        return points
+
+    def s_color(self, amt):
+        if amt == 0 or amt == 1:
+            if not self.points_to[int(amt)]:
+                return color(0, 0, 255)
+            elif self.is_arrow:
+                return color(0)
+            else:
+                return color(255)
+        else:
+            return lerpColor(self.s_color(0), self.s_color(1), amt)
+
+def seta(x1, y1, x2, y2, shorter=0, head=None,
+         tail_func=None, tail_size=None):
+    """
+    Seta means arrow in Portuguese
+    """
+    L = dist(x1, y1, x2, y2)
+    if not head:
+        head = max(L / 10, 10)
+    with pushMatrix():
+        translate(x1, y1)
+        angle = atan2(x1 - x2, y2 - y1)
+        rotate(angle)
+        offset = shorter / 2
+        strokeCap(ROUND)
+        if L > head * 2:
+            line(0, L - offset, -head / 3, L - offset - head)
+            line(0, L - offset, head / 3, L - offset - head)
+            strokeCap(SQUARE)
+            line(0, offset, 0, L - offset)
+        if tail_func and tail_size:
+            tail_func(0, 0, tail_size, tail_size)

s062/sketch.properties

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+mode=Python
+mode.id=jycessing.mode.PythonMode