1Math::NumSeq::PlanePathUNs(e3r)Contributed Perl DocumentMaattiho:n:NumSeq::PlanePathN(3)
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NAME

6       Math::NumSeq::PlanePathN -- sequence of N values from PlanePath module
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SYNOPSIS

9        use Math::NumSeq::PlanePathN;
10        my $seq = Math::NumSeq::PlanePathN->new (planepath => 'SquareSpiral',
11                                                 line_type => 'X_axis');
12        my ($i, $value) = $seq->next;
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DESCRIPTION

15       This module presents N values from a "Math::PlanePath" as a sequence.
16       The default is the X axis, or the "line_type" parameter (a string) can
17       choose among
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19           "X_axis"        X axis (positive part)
20           "Y_axis"        Y axis (positive part)
21           "X_neg"         X negative axis
22           "Y_neg"         Y negative axis
23           "Diagonal"      leading diagonal X=i, Y=i
24           "Diagonal_NW"   north-west diagonal X=-i, Y=i
25           "Diagonal_SW"   south-west diagonal X=-i, Y=-i
26           "Diagonal_SE"   south-east diagonal X=i, Y=-i
27           "Depth_start"   first N at depth=i
28           "Depth_end"     last N at depth=i
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30       For example the "SquareSpiral" X axis starts i=0 with values 1, 2, 11,
31       28, 53, 86, etc.
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33       "X_neg", "Y_neg", "Diagonal_NW", etc, on paths which don't traverse
34       negative X or Y have just a single value from X=0,Y=0.
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36       The behaviour on paths which visit only some of the points on the
37       respective axis is unspecified as yet, as is behaviour on paths with
38       repeat points, such as the "DragonCurve".
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FUNCTIONS

41       See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence
42       classes.
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44       "$seq = Math::NumSeq::PlanePathN->new (key=>value,...)"
45           Create and return a new sequence object.  The options are
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47               planepath          string, name of a PlanePath module
48               planepath_object   PlanePath object
49               line_type          string, as described above
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51           "planepath" can be either the module part such as "SquareSpiral" or
52           a full class name "Math::PlanePath::SquareSpiral".
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54       "$value = $seq->ith($i)"
55           Return the N value at $i in the PlanePath.  $i gives a position on
56           the respective "line_type", so the X,Y to lookup a "$value=N" is
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58                X,Y       line_type
59               -----      ---------
60               $i, 0      "X_axis"
61               0, $i      "Y_axis"
62               -$i, 0     "X_neg"
63               0, -$i     "Y_neg"
64               $i, $i     "Diagonal"
65               $i, -$i    "Diagonal_NW"
66               -$i, -$i   "Diagonal_SW"
67               $i, -$i    "Diagonal_SE"
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69       "$bool = $seq->pred($value)"
70           Return true if $value occurs in the sequence.
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72           This means $value is an integer N which is on the respective
73           "line_type", ie. that "($path->n_to_xy($value)" is on the line
74           type.
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SEE ALSO

77       Math::NumSeq, Math::NumSeq::PlanePathCoord,
78       Math::NumSeq::PlanePathDelta
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HOME PAGE

81       <http://user42.tuxfamily.org/math-planepath/index.html>
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LICENSE

84       Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020,
85       2021 Kevin Ryde
86
87       This file is part of Math-PlanePath.
88
89       Math-PlanePath is free software; you can redistribute it and/or modify
90       it under the terms of the GNU General Public License as published by
91       the Free Software Foundation; either version 3, or (at your option) any
92       later version.
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94       Math-PlanePath is distributed in the hope that it will be useful, but
95       WITHOUT ANY WARRANTY; without even the implied warranty of
96       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
97       General Public License for more details.
98
99       You should have received a copy of the GNU General Public License along
100       with Math-PlanePath.  If not, see <http://www.gnu.org/licenses/>.
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104perl v5.34.0                      2021-07-22       Math::NumSeq::PlanePathN(3)
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