diff options
Diffstat (limited to 'demos/boxes/trackball.cpp')
| -rw-r--r-- | demos/boxes/trackball.cpp | 44 |
1 files changed, 22 insertions, 22 deletions
diff --git a/demos/boxes/trackball.cpp b/demos/boxes/trackball.cpp index 0e847db..2b1b2e4 100644 --- a/demos/boxes/trackball.cpp +++ b/demos/boxes/trackball.cpp @@ -1,6 +1,7 @@ /**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the demonstration applications of the Qt Toolkit. @@ -9,8 +10,8 @@ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions -** contained in the either Technology Preview License Agreement or the -** Beta Release License Agreement. +** contained in the Technology Preview License Agreement accompanying +** this package. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser @@ -20,21 +21,20 @@ ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** -** In addition, as a special exception, Nokia gives you certain -** additional rights. These rights are described in the Nokia Qt LGPL -** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this -** package. +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** ** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3.0 as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU General Public License version 3.0 requirements will be -** met: http://www.gnu.org/copyleft/gpl.html. ** -** If you are unsure which license is appropriate for your use, please -** contact the sales department at http://qt.nokia.com/contact. ** $QT_END_LICENSE$ ** ****************************************************************************/ @@ -92,9 +92,9 @@ void TrackBall::move(const QPointF& p, const QQuaternion &transformation) { QLineF delta(m_lastPos, p); m_angularVelocity = 180*delta.length() / (PI*msecs); - m_axis = QVector3D(delta.dy(), -delta.dx(), 0.0f).normalized(); + m_axis = QVector3D(-delta.dy(), delta.dx(), 0.0f).normalized(); m_axis = transformation.rotateVector(m_axis); - m_rotation *= QQuaternion::fromAxisAndAngle(m_axis, delta.length()); + m_rotation = QQuaternion::fromAxisAndAngle(m_axis, 180 / PI * delta.length()) * m_rotation; } break; case Sphere: @@ -113,13 +113,13 @@ void TrackBall::move(const QPointF& p, const QQuaternion &transformation) else currentPos3D.normalize(); - m_axis = QVector3D::crossProduct(currentPos3D, lastPos3D); - float angle = asin(sqrt(QVector3D::dotProduct(m_axis, m_axis))); + m_axis = QVector3D::crossProduct(lastPos3D, currentPos3D); + float angle = 180 / PI * asin(sqrt(QVector3D::dotProduct(m_axis, m_axis))); - m_angularVelocity = 180*angle / (PI*msecs); + m_angularVelocity = angle / msecs; m_axis.normalize(); m_axis = transformation.rotateVector(m_axis); - m_rotation *= QQuaternion::fromAxisAndAngle(m_axis, angle); + m_rotation = QQuaternion::fromAxisAndAngle(m_axis, angle) * m_rotation; } break; } @@ -155,6 +155,6 @@ QQuaternion TrackBall::rotation() const QTime currentTime = QTime::currentTime(); float angle = m_angularVelocity * m_lastTime.msecsTo(currentTime); - return m_rotation * QQuaternion::fromAxisAndAngle(m_axis, angle); + return QQuaternion::fromAxisAndAngle(m_axis, angle) * m_rotation; } |