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129 lines
4.4 KiB
129 lines
4.4 KiB
/* This file is part of the KDE project
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Copyright (C) 2001 David Faure <faure@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef koPoint_h
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#define koPoint_h
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#include <tqwmatrix.h>
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#include <math.h>
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/**
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* A point whose coordinates are floating-point values ( "double"s ).
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* The API isn't documented, it's a perfect mirror of TQPoint.
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*/
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class KoPoint {
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public:
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KoPoint() { m_x = 0; m_y = 0; }
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KoPoint(const double &x, const double &y) : m_x(x), m_y(y) {}
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explicit KoPoint(const TQPoint & p) : m_x(p.x()), m_y(p.y()) {}
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~KoPoint() {}
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bool operator==(const KoPoint &rhs) const { return TQABS(m_x-rhs.x()) < 1E-10 && TQABS(m_y-rhs.y()) < 1E-10; }
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bool operator!=(const KoPoint &rhs) const { return TQABS(m_x-rhs.x()) > 1E-10 || TQABS(m_y-rhs.y()) > 1E-10; }
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bool isNull() const { return m_x == 0 && m_y == 0; }
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double x() const { return m_x; }
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double y() const { return m_y; }
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void setX(const double &x) { m_x = x; }
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void setY(const double &y) { m_y = y; }
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double &rx() { return m_x; }
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double &ry() { return m_y; }
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KoPoint &operator=(const KoPoint &rhs) { m_x = rhs.x(); m_y = rhs.y(); return *this; }
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KoPoint &operator+=( const KoPoint &rhs ) { m_x += rhs.x(); m_y += rhs.y(); return *this; }
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KoPoint &operator-=( const KoPoint &rhs ) { m_x -= rhs.x(); m_y -= rhs.y(); return *this; }
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KoPoint &operator*=( const double &c ) { m_x *= c; m_y *= c; return *this; }
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friend inline KoPoint operator+( const KoPoint &, const KoPoint & );
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friend inline KoPoint operator-( const KoPoint &, const KoPoint & );
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friend inline KoPoint operator*( const KoPoint &, const double & );
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friend inline KoPoint operator*( const double &, const KoPoint & );
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friend inline double operator*( const KoPoint &a, const KoPoint &b );
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// Not in TQPoint:
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void setCoords(const double &x, const double &y) { m_x = x; m_y = y; }
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KoPoint transform (const TQWMatrix &m) const
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{
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double x, y;
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m.map(m_x, m_y, &x, &y);
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return KoPoint(x, y);
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};
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bool isNear(const KoPoint &p, double range) const
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{
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return (p.x() >= m_x - range && p.x() <= m_x + range && p.y() >= m_y - range && p.y() <= m_y + range);
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}
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static double getAngle( const KoPoint& p1, const KoPoint& p2 ) {
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double a = atan2( p2.x() - p1.x(), p2.y() - p1.y() ) + M_PI;
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return ( ( - ( a * 360 ) / ( 2 * M_PI ) - 90 ) - 180 );
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}
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double manhattanLength() const
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{
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return TQABS( m_x ) + TQABS( m_y );
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}
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/// Convert to a TQPoint - with precision loss!
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TQPoint toTQPoint() const
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{
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return TQPoint( tqRound( m_x ), tqRound( m_y ) );
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}
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private:
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double m_x, m_y;
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};
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inline KoPoint operator+( const KoPoint &p1, const KoPoint &p2 )
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{ return KoPoint( p1.m_x+p2.m_x, p1.m_y+p2.m_y ); }
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inline KoPoint operator-( const KoPoint &p1, const KoPoint &p2 )
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{ return KoPoint( p1.m_x-p2.m_x, p1.m_y-p2.m_y ); }
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inline KoPoint operator*( const KoPoint &p, const double &c )
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{ return KoPoint( p.m_x*c, p.m_y*c ); }
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inline KoPoint operator*( const double &c, const KoPoint &p )
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{ return KoPoint( p.m_x*c, p.m_y*c ); }
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inline double operator*( const KoPoint &a, const KoPoint &b )
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{ return a.m_x * b.m_x + a.m_y * b.m_y; }
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/******************************
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kdDebug support
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*******************************/
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#include <kdebug.h>
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/** Show a floating point value with great precision (use within kdDebug) */
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#define DEBUGDOUBLE(d) TQString::number( (d), 'g', 20 )
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inline kdbgstream operator<<( kdbgstream str, const KoPoint & r ) {
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// should this use DEBUGDOUBLE?
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str << "(" << r.x() << ", " << r.y() << ")";
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return str;
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}
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inline kndbgstream operator<<( kndbgstream str, const KoPoint & ) { return str; }
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#endif
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