diff options
Diffstat (limited to 'src/gui/math3d/qvector3d.cpp')
| -rw-r--r-- | src/gui/math3d/qvector3d.cpp | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/src/gui/math3d/qvector3d.cpp b/src/gui/math3d/qvector3d.cpp index dee8e72..9552e3a 100644 --- a/src/gui/math3d/qvector3d.cpp +++ b/src/gui/math3d/qvector3d.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 QtGui module of the Qt Toolkit. @@ -20,10 +21,9 @@ ** 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 1.1, 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. @@ -205,7 +205,10 @@ QVector3D::QVector3D(const QVector4D& vector) */ QVector3D QVector3D::normalized() const { - qreal len = lengthSquared(); + // Need some extra precision if the length is very small. + double len = double(xp) * double(xp) + + double(yp) * double(yp) + + double(zp) * double(zp); if (qFuzzyIsNull(len - 1.0f)) return *this; else if (!qFuzzyIsNull(len)) @@ -222,7 +225,10 @@ QVector3D QVector3D::normalized() const */ void QVector3D::normalize() { - qreal len = lengthSquared(); + // Need some extra precision if the length is very small. + double len = double(xp) * double(xp) + + double(yp) * double(yp) + + double(zp) * double(zp); if (qFuzzyIsNull(len - 1.0f) || qFuzzyIsNull(len)) return; |