File size: 909 Bytes
84d8880 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 |
from itertools import chain
import numexpr as ne
import numpy as np
from ._letter import letter
def series(string, n, str):
segments = []
for i, _letter in enumerate(string):
# move pts to the correction position in a word
pts = letter(_letter) + i
# move pts to unit square
pts = 2 * pts / len(string) - 1
segments.append(ne.evaluate(str, local_dict={"z": list(__segment(pts, n=n))}))
# segments is a list of list, flatten it
return list(chain.from_iterable(segments))
def __segment(points, n=100):
"""
Each letter is a represented by a bunch of points a,b,c,d...
There are straight segments between two adjacent points
We represent each such segment as a collection of n auxilliary points
"""
for a, b in zip(points[:-1], points[1:]):
yield np.linspace(a.real, b.real, n) + 1j * np.linspace(a.imag, b.imag, n)
|