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Diffstat (limited to 'ksvg/impl/libs/libtext2path/src/Affine.cpp')
| -rw-r--r-- | ksvg/impl/libs/libtext2path/src/Affine.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/ksvg/impl/libs/libtext2path/src/Affine.cpp b/ksvg/impl/libs/libtext2path/src/Affine.cpp new file mode 100644 index 00000000..d06b53bc --- /dev/null +++ b/ksvg/impl/libs/libtext2path/src/Affine.cpp @@ -0,0 +1,174 @@ +/* + Copyright (C) 2003 Nikolas Zimmermann <wildfox@kde.org> + This file is part of the KDE project + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + aint with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +#include <math.h> + +#include "Point.h" +#include "Affine.h" + +using namespace T2P; + +Affine::Affine() +{ + m_affine[0] = 1.0; + m_affine[1] = 0.0; + m_affine[2] = 0.0; + m_affine[3] = 1.0; + m_affine[4] = 0.0; + m_affine[5] = 0.0; +} + +Affine::Affine(double affine[6]) +{ + for(int i = 0; i < 6; i++) + m_affine[i] = affine[i]; +} + +Affine::Affine(const Affine &other) +{ + (*this) = other; +} + +Affine::Affine(double m11, double m12, double m21, double m22, double dx, double dy) +{ + m_affine[0] = m11; m_affine[1] = m12; m_affine[2] = m21; + m_affine[3] = m22; m_affine[4] = dx; m_affine[5] = dy; +} + +Affine::~Affine() +{ +} + +Affine &Affine::operator*=(Affine &other) +{ + double d0 = m11() * other.m11() + m12() * other.m21(); + double d1 = m11() * other.m12() + m12() * other.m22(); + double d2 = m21() * other.m11() + m22() * other.m21(); + double d3 = m21() * other.m12() + m22() * other.m22(); + double d4 = dx() * other.m11() + dy() * other.m21() + other.dx(); + double d5 = dx() * other.m12() + dy() * other.m22() + other.dy(); + + m_affine[0] = d0; m_affine[1] = d1; m_affine[2] = d2; + m_affine[3] = d3; m_affine[4] = d4; m_affine[5] = d5; + + return *this; +} + +Affine &Affine::operator=(const Affine &other) +{ + for(int i = 0; i < 6; i++) + m_affine[i] = other.m_affine[i]; + + return *this; +} + +double &Affine::m11() +{ + return m_affine[0]; +} + +double &Affine::m12() +{ + return m_affine[1]; +} + +double &Affine::m21() +{ + return m_affine[2]; +} + +double &Affine::m22() +{ + return m_affine[3]; +} + +double &Affine::dx() +{ + return m_affine[4]; +} + +double &Affine::dy() +{ + return m_affine[5]; +} + +void Affine::scale(double s) +{ + scale(s, s); +} + +void Affine::scale(double sx, double sy) +{ + m_affine[0] = sx; + m_affine[3] = sy; +} + +void Affine::translate(const Point &point) +{ + m_affine[4] += point.x(); + m_affine[5] += point.y(); +} + +void Affine::translate(double tx, double ty) +{ + m_affine[4] += tx * m_affine[0] + ty * m_affine[2]; + m_affine[5] += tx * m_affine[1] + ty * m_affine[3]; +} + +void Affine::rotate(double angle) +{ + double sina = sin(angle); + double cosa = cos(angle); + + double tm11 = cosa * m_affine[0] + sina * m_affine[2]; + double tm12 = cosa * m_affine[1] + sina * m_affine[3]; + double tm21 = -sina * m_affine[0] + cosa * m_affine[2]; + double tm22 = -sina * m_affine[1] + cosa * m_affine[3]; + + m_affine[0] = tm11; m_affine[1] = tm12; + m_affine[2] = tm21; m_affine[3] = tm22; +} + +void Affine::rotateAround(double angle, const Point &point) +{ + translate(point); + rotate(angle); + translate(point.invert()); +} + +void Affine::rotateAround(double angle, double cx, double cy) +{ + translate(-cx, -cy); + rotate(angle); + translate(cx, cy); +} + +Point Affine::mapPoint(const Point &p) const +{ + return Point(p.x() * m_affine[0] + p.y() * m_affine[2] + m_affine[4], + p.x() * m_affine[1] + p.y() * m_affine[3] + m_affine[5]); +} + +double *Affine::data() +{ + return m_affine; +} + +// vim:ts=4:noet |