kopia lustrzana https://github.com/villares/sketch-a-day
65 wiersze
2.0 KiB
Python
65 wiersze
2.0 KiB
Python
#*- coding: utf-8 -*-
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from __future__ import division, print_function
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def setup_grid(graph, width, height, margin=None):
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margin = margin or width / 40
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cols, rows = dim_grid(len(graph))
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w, h = (width - margin * 2) / cols, (height - margin * 2) / rows
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points = []
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for i in range(cols * rows):
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c = i % cols
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r = i // rows
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x = margin + w * 0.5 + c * w - 14 * (r % 2) + 7
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y = margin + h * 0.5 + r * h - 14 * (c % 2) + 7
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z = 0
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points.append((x, y, z))
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points = sorted(
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points, key=lambda p: dist(p[0], p[1], width / 2, height / 2))
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v_list = reversed(sorted(graph.vertices(), key=graph.vertex_degree))
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# v_list = sorted(graph.vertices(), key=graph.vertex_degree)
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grid = {v: p for v, p in zip(v_list, points)}
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return grid
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def dim_grid(n):
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a = int(sqrt(n))
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b = n // a
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if a * b < n:
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b += 1
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print(u'{}: {} × {} ({})'.format(n, a, b, a * b))
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return a, b
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def edge_distances(graph, grid):
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total = 0
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for edge in graph.edges():
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if len(edge) == 2:
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a, b = edge
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d = PVector.dist(PVector(*grid[a]),
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PVector(*grid[b]))
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total += d
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return total
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def grid_swap(graph, grid, num=2):
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from random import sample
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fail = 0
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n = m = edge_distances(graph, grid)
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while m <= n and fail < len(graph) ** 2:
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new_grid= dict(grid)
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if num == 2:
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a, b = sample(graph.vertices(), 2)
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new_grid[a], new_grid[b] = new_grid[b], new_grid[a]
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else:
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ks = sample(graph.vertices(), num)
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vs = [grid[k] for k in sample(ks, num)]
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for k, v in zip(ks, vs):
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new_grid[k] = v
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n = edge_distances(graph, new_grid)
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if m > n:
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t = "\n{:.2%} at: {} tries of {}v shuffle/swap"
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print(t.format((n - m) / m, fail + 1, num), end="")
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return new_grid
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else:
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fail += 1
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print(".", end='')
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return grid
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