npr:
A Moire pattern inspired by ‘eddying currents’
Mathematica code:
Eddy[x_, y_, s_, n_, th_, R_] :=
Translate[
{Thickness[th], Line[
Table[
If[R == 0,
TransformationFunction[IdentityMatrix[3]],
ReflectionTransform[{0, 1}]]
[{If[Or[Mod[i, 4] == 0, Mod[i, 4] == 1],
Floor[(i + 1)/4], s - Floor[i/4]],
If[Or[Mod[i, 4] == 0, Mod[i, 4] == 3],
Floor[Abs[(i - 1)]/4], s - Floor[i/4]]}],
{i, 0, n, 1}]]},
{x, y}]
G[pr_, th_, o_, h_, s_, n_, X_, Y_, t_] :=
Graphics[{
Table[
Eddy[1 + X*x, 1 + Y*y, s, n, th, Mod[x, 2]],
{x, 0, 8, 1}, {y, 0, 8, 1}],
Translate[
Table[
{Opacity[o], Thickness[th],
Line[
Table[{{i - j*i, j*i}, {i - j*(i - h), h - j*h + j*i}},
{i, -h, h, 1}]]},
{j, 0, 1}],
{-t, -t}]},
PlotRange -> {{0, pr}, {0, 7/5 pr}}, ImageSize -> {500, 700}]
Manipulate[
G[40, .011, 1, 60, 5.25, 11, 7.2, 7.2, t],
{t, 1, 1/30, -1/30}]
via Tumblr http://pitayasysahuaros.tumblr.com/post/55660496806
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