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80 lines
1.9 KiB
Python
80 lines
1.9 KiB
Python
6 years ago
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import re
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from pprint import pprint
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from PIL import Image
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class Point:
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def __init__(self, pos, vel):
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self.pos = pos
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self.vel = vel
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def pos_at(self, sec):
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x = self.pos[0] + self.vel[0] * sec
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y = self.pos[1] + self.vel[1] * sec
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return (x, y)
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def __repr__(self):
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return f'<Point pos={self.pos} vel={self.vel}>'
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class Picture:
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def __init__(self, width, height):
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self.data = []
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for _ in range(height):
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self.data.append(['.'] * width)
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def draw(self, x, y):
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self.data[y][x] = '#'
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def paint(self):
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for row in self.data:
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print(''.join(row))
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def parse(point_str):
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pos = (int(point_str[10:16]), int(point_str[17:24]))
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vel = (int(point_str[36:38]), int(point_str[39:42]))
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return(Point(pos, vel))
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with open('input.txt', 'r') as f:
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points = [parse(x) for x in f.readlines()]
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def calc_bbox(points, sec):
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coords = [p.pos_at(sec) for p in points]
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min_x = min([x[0] for x in coords])
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min_y = min([x[1] for x in coords])
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max_x = max([x[0] for x in coords])
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max_y = max([x[1] for x in coords])
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return [(min_x, min_y), (max_x, max_y)]
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def delta_from_bbox(bbox):
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return (bbox[1][0] - bbox[0][0], bbox[1][1] - bbox[0][1])
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def calc_min_res():
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cur_res = 10000000000000000000
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i = 0
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while 1:
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bbox = calc_bbox(points, i)
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delta = delta_from_bbox(bbox)
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res = delta[0] * delta[1]
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if res > cur_res:
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return i - 1
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cur_res = res
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i += 1
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print('Calculating min res')
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i = calc_min_res()
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print('Finished. Points closest at second:', i)
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def paint(points, sec):
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coords = [p.pos_at(i) for p in points]
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bbox = calc_bbox(points, sec)
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delta = delta_from_bbox(bbox)
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pic = Picture(delta[0] + 1, delta[1] + 1)
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for pos in coords:
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pic.draw(pos[0] - bbox[0][0], pos[1] - bbox[0][1])
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pic.paint()
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paint(points, i)
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