75 lines
2.0 KiB
Python
75 lines
2.0 KiB
Python
# Constructs line equastions from a set of polar cords that represent a room
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# Invoke python mklines.py <filename>
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import csv
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import sys
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import math
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from os.path import exists as file_exists
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def main():
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filename = get_filename()
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if filename == -1: return -1
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if not file_exists(filename):
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perr('File does not exist')
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return -1
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samples_polar = read_csv(filename, remove_header=True)
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if not valid_data(samples_polar): # Assumes header is removed
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perr('Invalid or corrupt samples')
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return -1
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x = polarlist_to_cart(samples_polar)
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return 0
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def read_csv(filename: str, remove_header=False) -> list:
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tmp_data = list()
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with open(filename, 'r') as csv_file:
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reader = csv.reader(csv_file)
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for i, row in enumerate(reader):
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new_row = list()
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if remove_header and i == 0: continue
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for i, val in enumerate(row):
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if i == 0: new_row.append(val)
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else: new_row.append(float(val))
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tmp_data.append(new_row)
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return tmp_data
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def get_line_eq(point1, point2)-> tuple:
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m = ((point2[1] - point1[1])/(point2[0] - point1[0]))
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# y = mx + b
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# b = y - mx
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# Using p1 to find b
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b = point1[1] - (m*point1[0])
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def valid_data(samples:list) -> bool:
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# Check if we have even number of samples
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return len(samples) % 2 == 0
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def polarlist_to_cart(polar_points: list):
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cart_tmp = list()
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for i, polar_point in enumerate(polar_points, 1):
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if i % 2 == 0: continue
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# We can safely use i - 1 here
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p1 = polar_points[i-1]
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p2 = polar_points[i]
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print(p1, p2)
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p1 = polar_to_cart(p1[0],p1[1])
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p2 = polar_to_cart(p2[0],p2[1])
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def points_to_straight_line():
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pass
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def get_filename() -> str:
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try:
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filename = sys.argv[1]
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return filename
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except IndexError:
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perr('Provide target file name')
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return -1
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def perr(msg):
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print(msg, file=sys.stderr)
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if __name__ == '__main__':
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exit(main()) |