Added qFastSin() and qFastCos() functions.

The new functions use a lookup table.

Reviewed-by: Trond

1 files changed, 305 insertions, 0 deletions

diff --git a/src/corelib/kernel/qmath.cpp b/src/corelib/kernel/qmath.cpp
new file mode 100644
index 0000000..24bec4a
--- /dev/null
+++ b/src/corelib/kernel/qmath.cpp
@@ -0,0 +1,305 @@
+/****************************************************************************
+**
+** 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 QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 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
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/qmath.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_CORE_EXPORT const qreal qt_sine_table[QT_SINE_TABLE_SIZE] = {
+    0.0,
+	0.024541228522912288,
+	0.049067674327418015,
+	0.073564563599667426,
+	0.098017140329560604,
+	0.1224106751992162,
+	0.14673047445536175,
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+	0.31368174039889152,
+	0.33688985339222005,
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+	0.40524131400498986,
+	0.42755509343028208,
+	0.44961132965460654,
+	0.47139673682599764,
+	0.49289819222978404,
+	0.51410274419322166,
+	0.53499761988709715,
+	0.55557023301960218,
+	0.57580819141784534,
+	0.59569930449243336,
+	0.61523159058062682,
+	0.63439328416364549,
+	0.65317284295377676,
+	0.67155895484701833,
+	0.68954054473706683,
+	0.70710678118654746,
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+	0.83146961230254524,
+	0.84485356524970701,
+    0.85772861000027212,
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+	0.89322430119551532,
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+	0.91420975570353069,
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+	0.99879545620517241,
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+	1.0,
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+	0.99879545620517241,
+	0.99729045667869021,
+	0.99518472667219693,
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+	0.63439328416364549,
+	0.61523159058062693,
+	0.59569930449243347,
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+	0.51410274419322177,
+	0.49289819222978415,
+	0.47139673682599786,
+	0.44961132965460687,
+	0.42755509343028203,
+	0.40524131400498992,
+	0.38268343236508989,
+	0.35989503653498833,
+	0.33688985339222033,
+	0.31368174039889141,
+	0.29028467725446239,
+	0.26671275747489848,
+	0.24298017990326407,
+	0.21910124015687005,
+	0.19509032201612861,
+	0.17096188876030122,
+	0.1467304744553618,
+	0.12241067519921635,
+	0.098017140329560826,
+	0.073564563599667732,
+	0.049067674327417966,
+	0.024541228522912326,
+	0.0,
+	-0.02454122852291208,
+	-0.049067674327417724,
+	-0.073564563599667496,
+	-0.09801714032956059,
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+	-0.17096188876030097,
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+	-0.2191012401568698,
+	-0.24298017990326382,
+	-0.26671275747489825,
+	-0.29028467725446211,
+	-0.31368174039889118,
+	-0.33688985339222011,
+	-0.35989503653498811,
+	-0.38268343236508967,
+	-0.40524131400498969,
+	-0.42755509343028181,
+	-0.44961132965460665,
+	-0.47139673682599764,
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+	-0.098017140329560506,
+	-0.073564563599667412,
+	-0.049067674327418091,
+	-0.024541228522912448
+};
+
+QT_END_NAMESPACE