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Fix triangular lattice code in pgcgen

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jan 2016-06-21 18:25:23 -07:00
parent c754e1c1ad
commit 89e305f78e
1 changed files with 13 additions and 6 deletions
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19
pcgen.py
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@ -30,13 +30,20 @@ def triangular_lattice(dims: List[int],
k = 1
positions = []
for j in numpy.arange(dims[1]):
j_odd = j % 2
x_offset = (j_odd * 0.5) - dims[0]/2
y_offset = dims[1]/2
xs = numpy.arange(dims[0] - k * j_odd) + x_offset
ys = numpy.full_like(xs, j * numpy.sqrt(3)/2 + y_offset)
ymax = (dims[1] - 1)/2
for j in numpy.linspace(-ymax, ymax, dims[0]):
j_odd = numpy.floor(j) % 2
x_offset = j_odd * 0.5
y_offset = j * numpy.sqrt(3)/2
num_x = dims[0] - k * j_odd
xmax = (dims[0] - 1)/2
xs = numpy.linspace(-xmax, xmax - k * j_odd, num_x) + x_offset
ys = numpy.full_like(xs, y_offset)
positions += [numpy.vstack((xs, ys)).T]
xy = numpy.vstack(tuple(positions))
return xy[xy[:, 0].argsort(), ]