116 lines
3 KiB
C++
116 lines
3 KiB
C++
/*
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* SPDX-License-Identifier: GPL-3.0-only
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* MuseScore-CLA-applies
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*
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* MuseScore
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* Music Composition & Notation
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*
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* Copyright (C) 2021 MuseScore BVBA and others
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __SKYLINE_H__
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#define __SKYLINE_H__
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#include <vector>
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#include "infrastructure/draw/geometry.h"
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namespace Ms {
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#ifndef NDEBUG
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#define DEBUG_SKYLINE // enable skyline debugging
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#endif
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class Segment;
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class Shape;
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//---------------------------------------------------------
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// SkylineSegment
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//---------------------------------------------------------
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struct SkylineSegment {
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qreal x;
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qreal y;
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qreal w;
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SkylineSegment(qreal _x, qreal _y, qreal _w)
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: x(_x), y(_y), w(_w) {}
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};
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//---------------------------------------------------------
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// SkylineLine
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//---------------------------------------------------------
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class SkylineLine
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{
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const bool north;
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std::vector<SkylineSegment> seg;
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typedef std::vector<SkylineSegment>::iterator SegIter;
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typedef std::vector<SkylineSegment>::const_iterator SegConstIter;
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SegIter insert(SegIter i, qreal x, qreal y, qreal w);
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void append(qreal x, qreal y, qreal w);
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SegIter find(qreal x);
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SegConstIter find(qreal x) const;
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public:
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SkylineLine(bool n)
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: north(n) {}
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void add(const Shape& s);
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void add(const mu::RectF& r);
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void add(qreal x, qreal y, qreal w);
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void clear() { seg.clear(); }
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void dump() const;
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qreal minDistance(const SkylineLine&) const;
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qreal max() const;
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bool valid() const;
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bool valid(const SkylineSegment& s) const;
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bool isNorth() const { return north; }
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SegIter begin() { return seg.begin(); }
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SegConstIter begin() const { return seg.begin(); }
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SegIter end() { return seg.end(); }
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SegConstIter end() const { return seg.end(); }
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};
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//---------------------------------------------------------
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// Skyline
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//---------------------------------------------------------
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class Skyline
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{
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SkylineLine _north;
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SkylineLine _south;
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public:
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Skyline()
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: _north(true), _south(false) {}
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void clear();
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void add(const Shape& s);
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void add(const mu::RectF& r);
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qreal minDistance(const Skyline&) const;
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SkylineLine& north() { return _north; }
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SkylineLine& south() { return _south; }
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const SkylineLine& north() const { return _north; }
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const SkylineLine& south() const { return _south; }
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void dump(const char*, bool north = false) const;
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};
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} // namespace Ms
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#endif
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