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LSST Data Management Base Package
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functional.cc
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1/*
2 * LSST Data Management System
3 * Copyright 2017 AURA/LSST.
4 *
5 * This product includes software developed by the
6 * LSST Project (http://www.lsst.org/).
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the LSST License Statement and
19 * the GNU General Public License along with this program. If not,
20 * see <https://www.lsstcorp.org/LegalNotices/>.
21 */
22#include <stdexcept>
23#include <string>
24
25#include "astshim/functional.h"
26#include "astshim/UnitMap.h"
27#include "astshim/UnitNormMap.h"
28#include "astshim/ParallelMap.h"
29#include "astshim/SeriesMap.h"
30
31namespace ast {
32
33std::shared_ptr<FrameSet> append(FrameSet const& first, FrameSet const& second) {
34 std::shared_ptr<FrameSet> const merged = first.copy();
35 std::shared_ptr<FrameSet> const newFrames = second.copy();
36
37 newFrames->setCurrent(FrameSet::BASE);
38 int const joinNAxes = first.getFrame(FrameSet::CURRENT)->getNAxes();
39 merged->addFrame(FrameSet::CURRENT, UnitMap(joinNAxes), *newFrames);
40
41 // All frame numbers from `second` have been offset in `merged` by number of frames in `first`
42 int const mergedCurrent = first.getNFrame() + second.getCurrent();
43 merged->setCurrent(mergedCurrent);
44
45 return merged;
46}
47
49 auto naxes = center.size();
50 if (mapping1d.getNIn() != 1) {
51 throw std::invalid_argument("mapping1d has " + std::to_string(mapping1d.getNIn()) +
52 " inputs, instead of 1");
53 }
54 if (mapping1d.getNOut() != 1) {
55 throw std::invalid_argument("mapping1d has " + std::to_string(mapping1d.getNOut()) +
56 " outputs, instead of 1");
57 }
58 auto unitNormMap = UnitNormMap(center);
60 unitNormMap.then(UnitMap(naxes).under(mapping1d)).then(*unitNormMap.inverted()));
61}
62
63} // namespace ast
A FrameSet consists of a set of one or more Frames (which describe coordinate systems),...
Definition FrameSet.h:99
static int constexpr CURRENT
index of current frame
Definition FrameSet.h:105
static int constexpr BASE
index of base frame
Definition FrameSet.h:104
An abstract base class for objects which transform one set of coordinates to another.
Definition Mapping.h:59
int getNOut() const
Get NOut: the number of output axes.
Definition Mapping.h:82
int getNIn() const
Get NIn: the number of input axes.
Definition Mapping.h:77
A UnitMap is a unit (null) Mapping that has no effect on the coordinates supplied to it.
Definition UnitMap.h:44
The forward transformation of a UnitNormMap subtracts the specified centre and then transforms the re...
Definition UnitNormMap.h:53
T make_shared(T... args)
AST wrapper classes and functions.
std::shared_ptr< FrameSet > append(FrameSet const &first, FrameSet const &second)
Construct a FrameSet that performs two transformations in series.
Definition functional.cc:33
std::shared_ptr< Mapping > makeRadialMapping(std::vector< double > const &center, Mapping const &mapping1d)
Construct a radially symmetric mapping from a 1-dimensional mapping.
Definition functional.cc:48
T size(T... args)
T to_string(T... args)