kopia lustrzana https://github.com/villares/sketch-a-day
112 wiersze
4.1 KiB
Python
112 wiersze
4.1 KiB
Python
"""
|
|
sketch 54 180223 - Alexandre B A Villares
|
|
https://abav.lugaralgum.com/sketch-a-day
|
|
"""
|
|
from collections import namedtuple
|
|
import random as rnd
|
|
|
|
SPACING, MARGIN = 120, 120
|
|
X_LIST, Y_LIST = [], [] # listas de posições para elementos
|
|
NUM_NODES = 12 # número de elementos do desenho / number of nodes
|
|
Node = namedtuple(
|
|
'Node', ['x', 'y', 't_size', 's_weight', 'is_arrow', 'points_to'])
|
|
DESENHO = [] # lista dos elementos, 'nodes', do desenho
|
|
|
|
def setup():
|
|
size(600, 600)
|
|
rectMode(CENTER)
|
|
noFill()
|
|
X_LIST[:] = [x for x in range(MARGIN, 1 + width - MARGIN, SPACING)]
|
|
Y_LIST[:] = [y for y in range(MARGIN, 1 + height - MARGIN, SPACING)]
|
|
novo_desenho()
|
|
println("'s' to save, and 'n' for a new drawing")
|
|
|
|
def new_node():
|
|
return Node( # elemento/"nó" uma namedtuple com:
|
|
rnd.choice(X_LIST), # x
|
|
rnd.choice(Y_LIST), # y
|
|
rnd.choice([10, 20, 30]), # t_size (tail/circle size)
|
|
rnd.choice([2, 4, 6]), # s_weight (espessura da linha)
|
|
rnd.choice([True, False]), # is_arrow? (se é seta ou 'linha')
|
|
[] # points_to... (lista com ref. a outro elem.))
|
|
)
|
|
|
|
def novo_desenho():
|
|
"""
|
|
esvazia a lista elementos (setas e linhas) do desenho anterior
|
|
clears the list of nodes and creates a a new drawing appending DESENHO,
|
|
a list of nodes/drawing elements: arrows, connecting lines and lonely nodes
|
|
"""
|
|
DESENHO[:] = []
|
|
for _ in range(NUM_NODES):
|
|
DESENHO.append(new_node())
|
|
for node in DESENHO: # para cada elemento do desenho
|
|
random_node = rnd.choice(DESENHO) # sorteia outro elemento
|
|
if (node.x, node.y) != (random_node.x, random_node.y):
|
|
# 'aponta' para este elemento, acrescenta na sub_lista
|
|
node.points_to.append(random_node)
|
|
|
|
# the previous process might generate non-point nodes / podem haver nós
|
|
# que não apontam
|
|
lonely_nodes = [n for n in DESENHO if not n.points_to]
|
|
# check if there at least one non-pointing node
|
|
if not lonely_nodes:
|
|
# I want at least one (non-pointing nodes will be red)
|
|
DESENHO.append(new_node())
|
|
|
|
def seta(x1, y1, x2, y2, shorter=0, head=None,
|
|
tail_func=None, tail_size=None):
|
|
"""
|
|
O código para fazer as setas, dois pares (x, y),
|
|
um parâmetro de encurtamento: shorter
|
|
e para o tamanho da cabeça da seta: head
|
|
"""
|
|
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)
|
|
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)
|
|
|
|
def draw():
|
|
background(200)
|
|
# draws white 'lines', non-arrows, first.
|
|
for node in (n for n in DESENHO if not n.is_arrow):
|
|
for other in node.points_to: # se estiver apontando para alguém
|
|
strokeWeight(node.s_weight)
|
|
stroke(255)
|
|
line(node.x, node.y, other.x, other.y)
|
|
# desenha o círculo (repare que só em nós que 'apontam')
|
|
ellipse(node.x, node.y, node.t_size, node.t_size)
|
|
# then draws 'lonely nodes' in red (nodes that do not point anywhere)
|
|
for node in (n for n in DESENHO if not n.points_to):
|
|
strokeWeight(node.s_weight)
|
|
stroke(255, 0, 0) # red stroke for lonely nodes
|
|
if node.is_arrow:
|
|
rect(node.x, node.y, node.t_size, node.t_size)
|
|
else:
|
|
ellipse(node.x, node.y, node.t_size, node.t_size)
|
|
# then draws black arrows
|
|
for node in (n for n in DESENHO if n.is_arrow):
|
|
for other in node.points_to: # se estiver apontando para alguém
|
|
strokeWeight(node.s_weight)
|
|
stroke(0)
|
|
seta(node.x, node.y, other.x, other.y,
|
|
node.t_size, node.s_weight * 5,
|
|
rect, node.t_size)
|
|
|
|
def keyPressed():
|
|
if key == 's':
|
|
saveFrame("####.png")
|
|
if key == 'n':
|
|
novo_desenho()
|