kopia lustrzana https://github.com/villares/sketch-a-day
136 wiersze
4.5 KiB
Python
136 wiersze
4.5 KiB
Python
# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
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SKETCH_NAME, OUTPUT = "sketch_190320a", ".gi"
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"""
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based on sketch 57 180226
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"""
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from collections import namedtuple
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import random as rnd
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add_library('GifAnimation')
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from gif_exporter import gif_export
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SPACING, MARGIN = 120, 120
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X_LIST, Y_LIST = [], [] # listas de posições para elementos
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DESENHO = [] # lista dos elementos, 'nodes', do desenho
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NUM_NODES = 8 # número de elementos do desenho / number of nodes
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Node = namedtuple(
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'Node', ['x', 'y', 't_size', 's_weight', 'is_arrow', 'points_to'])
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def setup():
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size(600, 600)
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rectMode(CENTER)
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noFill()
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X_LIST[:] = [x for x in range(MARGIN, 1 + width - MARGIN, SPACING)]
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Y_LIST[:] = [y for y in range(MARGIN, 1 + height - MARGIN, SPACING)]
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novo_desenho(DESENHO)
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println("'s' to save, and 'n' for a new drawing")
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def keyPressed():
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if key == 's':
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saveFrame("####.png")
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if key == 'r':
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make_nodes_point(DESENHO)
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if key == 'n':
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novo_desenho(DESENHO)
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if key == 'g':
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gif_export(GifMaker, filename=SKETCH_NAME)
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def novo_desenho(desenho):
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"""
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esvazia a lista elementos (waves e linhas) do desenho anterior
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clears the list of nodes and creates a a new drawing appending DESENHO,
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a list of nodes/drawing elements: arrows, connecting lines and lonely nodes
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"""
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desenho[:] = []
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for _ in range(NUM_NODES):
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desenho.append(new_node())
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make_nodes_point(desenho)
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def new_node():
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return Node( # elemento/"nó" uma namedtuple com:
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rnd.choice(X_LIST), # x
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rnd.choice(Y_LIST), # y
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rnd.choice([10, 20, 30]), # t_size (tail/circle size)
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rnd.choice([2, 4, 6]), # s_weight (espessura da linha)
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rnd.choice([True, False]), # is_arrow? (se é wave ou 'linha')
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[] # points_to... (lista com ref. a outro elem.))
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)
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def make_nodes_point(desenho):
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for node in desenho: # para cada elemento do desenho
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node.points_to[:] = []
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random_node = rnd.choice(desenho) # sorteia outro elemento
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if (node.x, node.y) != (random_node.x, random_node.y):
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# 'aponta' para este elemento, acrescenta na sub_lista
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node.points_to.append(random_node)
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def draw():
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background(200)
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# draws white 'lines', non-arrows, first.
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for node in (n for n in DESENHO if not n.is_arrow):
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for other in node.points_to: # se estiver apontando para alguém
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strokeWeight(node.s_weight)
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stroke(255)
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line(node.x, node.y, other.x, other.y)
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# desenha o círculo (repare que só em nós que 'apontam')
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ellipse(node.x, node.y, node.t_size, node.t_size)
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# then draws 'lonely nodes' in red (nodes that do not point anywhere)
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for node in (n for n in DESENHO if not n.points_to):
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strokeWeight(node.s_weight)
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stroke(255, 0, 0) # red stroke for lonely nodes
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if node.is_arrow:
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rect(node.x, node.y, node.t_size, node.t_size)
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else:
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ellipse(node.x, node.y, node.t_size, node.t_size)
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# then draws black arrows
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for node in (n for n in DESENHO if n.is_arrow):
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for other in node.points_to: # se estiver apontando para alguém
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strokeWeight(node.s_weight)
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stroke(0)
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wave(node.x, node.y, other.x, other.y,
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node.t_size)
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def wave(x1, y1, x2, y2, s=None):
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"""
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O código para fazer as waves, dois pares (x, y),
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"""
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L = int(dist(x1, y1, x2, y2))
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if not s:
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s = int(max(L / 10, 10))
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with pushMatrix():
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translate(x1, y1)
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angle = atan2(x1 - x2, y2 - y1)
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rotate(angle)
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offset = 0
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N = 10
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dy = L / (N-1)
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for i in range(N-2):
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# y = dy/2 + map(i, 0, N-1, 0, L)
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# if i % 2: pass
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# # line(0, y -dy, -s, y)
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# # line(0, y +dy, -s, y)
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# else:
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# line(-s, y -dy, s, y)
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# line(-s, y +dy, s, y)
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y = map(i, 0, N-1, 0, L)
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if i % 2:
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line(s, y , -s, y)
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line(s, y + 2*dy, -s, y)
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else:
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line(-s, y , s, y)
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line(-s, y + 2*dy, s, y)
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line(0, 0, 0, L)
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# print text to add to the project's README.md
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def settings():
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println(
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"""
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[{0}](https://github.com/villares/sketch-a-day/tree/master/2019/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
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""".format(SKETCH_NAME, OUTPUT)
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)
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