kopia lustrzana https://github.com/villares/sketch-a-day
116 wiersze
3.2 KiB
Python
116 wiersze
3.2 KiB
Python
#*- coding: utf-8 -*-
|
||
|
||
from __future__ import division, print_function
|
||
from random import sample, choice
|
||
|
||
|
||
class Grid():
|
||
|
||
def __init__(self, graph, width, height, margin=None, mode=0):
|
||
"""
|
||
mode 0: heavy center
|
||
mode 1: heavy perifery
|
||
"""
|
||
margin = margin or width / 40
|
||
cols, rows = dim_grid(len(graph))
|
||
w, h = (width - margin * 2) / cols, (height - margin * 2) / rows
|
||
points = []
|
||
for i in range(cols * rows):
|
||
c = i % cols
|
||
r = i // rows
|
||
x = margin + w * 0.5 + c * w # - 14 * (r % 2) + 7
|
||
y = margin + h * 0.5 + r * h # - 14 * (c % 2) + 7
|
||
z = 0
|
||
points.append([x, y, z])
|
||
points = sorted(
|
||
points, key=lambda p: dist(p[0], p[1], width / 2, height / 2))
|
||
if mode == 0:
|
||
v_list = reversed(
|
||
sorted(graph.vertices(), key=graph.vertex_degree))
|
||
elif mode == 1:
|
||
v_list = sorted(graph.vertices(), key=graph.vertex_degree)
|
||
else:
|
||
v_list = graph.vertices()
|
||
print("random mode")
|
||
|
||
Grid.w, Grid.h = w, h
|
||
self.graph = graph
|
||
self.grid = {v: p for v, p in zip(v_list, points)}
|
||
recalculate_sizes_from_v_deg(self.graph, self)
|
||
|
||
def __getitem__(self, k):
|
||
return self.grid[k]
|
||
|
||
def __setitem__(self, k, v):
|
||
self.grid[k] = v
|
||
|
||
def __len__(self):
|
||
return len(self.grid)
|
||
|
||
def keys(self):
|
||
return self.grid.keys()
|
||
|
||
def values(self):
|
||
return self.grid.values()
|
||
|
||
def __iter__(self):
|
||
return iter(self.grid)
|
||
|
||
def swap(self, num=2):
|
||
grid = self.grid
|
||
graph = self.graph
|
||
fail = 0
|
||
n = m = edge_distances(graph, grid)
|
||
while m <= n and fail < len(graph) ** 2:
|
||
new_grid = dict(grid)
|
||
if num == 2:
|
||
a, b = sample(graph.vertices(), 2)
|
||
new_grid[a], new_grid[b] = new_grid[b], new_grid[a]
|
||
else:
|
||
ks = sample(graph.vertices(), num)
|
||
vs = [grid[k] for k in sample(ks, num)]
|
||
for k, v in zip(ks, vs):
|
||
new_grid[k] = v
|
||
n = edge_distances(graph, new_grid)
|
||
if m > n:
|
||
t = "{:.2%} at: {} tries of {}v shuffle/swap" \
|
||
.format((n - m) / m, fail + 1, num)
|
||
print("\n" + t, end="")
|
||
recalculate_sizes_from_v_deg(graph, new_grid)
|
||
self.grid = new_grid
|
||
else:
|
||
fail += 1
|
||
print(".", end='')
|
||
|
||
|
||
|
||
def dim_grid(n):
|
||
a = int(sqrt(n))
|
||
b = n // a
|
||
if a * b < n:
|
||
b += 1
|
||
print(u'{}: {} × {} ({})'.format(n, a, b, a * b))
|
||
return a, b
|
||
|
||
def edge_distances(graph, grid):
|
||
total = 0
|
||
for edge in graph.edges():
|
||
if len(edge) == 2:
|
||
a, b = edge
|
||
d = PVector.dist(PVector(*grid[a]),
|
||
PVector(*grid[b]))
|
||
total += d
|
||
return total
|
||
|
||
|
||
def recalculate_sizes_from_v_deg(graph, grid):
|
||
u = Grid.w / 10
|
||
for k in grid.keys():
|
||
grid[k][2] = u * graph.vertex_degree(k)
|
||
return u
|
||
|
||
def v_dist(a, b):
|
||
xa, ya, _ = a
|
||
xb, yb, _ = b
|
||
return dist(xa, ya, xb, yb)
|