mirror of
https://github.com/swift-project/pilotclient.git
synced 2026-04-01 05:26:45 +08:00
committed by
Mathew Sutcliffe
parent
229d7c6068
commit
978f3c88e5
@@ -9,59 +9,59 @@
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namespace BlackMisc
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{
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namespace Math
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{
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namespace Math
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{
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/*
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* Hypotenuse
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*/
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double CMath::hypot(double x, double y)
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{
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x = qAbs(x);
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y = qAbs(y);
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double max = std::max(x, y);
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double min = std::min(x, y);
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double r = min / max;
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return max * sqrt(1 + r * r);
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}
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/*
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* Hypotenuse
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*/
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double CMath::hypot(double x, double y)
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{
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x = qAbs(x);
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y = qAbs(y);
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double max = std::max(x, y);
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double min = std::min(x, y);
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double r = min / max;
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return max * sqrt(1 + r * r);
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}
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/*
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* Real part of cubic root
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*/
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double CMath::cubicRootReal(double x)
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{
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double result;
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result = std::pow(qAbs(x), (double)1.0 / 3.0);
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return x < 0 ? -result : result;
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}
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/*
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* Real part of cubic root
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*/
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double CMath::cubicRootReal(double x)
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{
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double result;
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result = std::pow(qAbs(x), (double)1.0 / 3.0);
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return x < 0 ? -result : result;
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}
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/*
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* Round utility method
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*/
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double CMath::round(double value, int digits)
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{
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// gosh, is there no Qt method for this??? It's year 2013
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double fractpart, intpart;
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fractpart = modf(value, &intpart);
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if (fractpart == 0) return value; // do not mess any "integers" to the worse
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double m = pow(10.0, digits);
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qint64 ri = qRound64(value * m); // do not loose any range here
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double rv = double(ri) / m;
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return rv;
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}
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/*
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* Round utility method
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*/
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double CMath::round(double value, int digits)
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{
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// gosh, is there no Qt method for this??? It's year 2013
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double fractpart, intpart;
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fractpart = modf(value, &intpart);
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if (fractpart == 0) return value; // do not mess any "integers" to the worse
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double m = pow(10.0, digits);
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qint64 ri = qRound64(value * m); // do not loose any range here
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double rv = double(ri) / m;
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return rv;
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}
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/*
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* Round by given epsilon value
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*/
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double CMath::roundEpsilon(double value, double epsilon)
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{
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double fractpart, intpart;
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fractpart = modf(value, &intpart);
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if (fractpart == 0) return value; // do not mess any "integers" to the worse
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qint64 ri = qRound(value / epsilon);
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double rv = double(ri) * epsilon; // do not loose any range here
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return rv;
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}
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/*
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* Round by given epsilon value
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*/
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double CMath::roundEpsilon(double value, double epsilon)
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{
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double fractpart, intpart;
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fractpart = modf(value, &intpart);
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if (fractpart == 0) return value; // do not mess any "integers" to the worse
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qint64 ri = qRound(value / epsilon);
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double rv = double(ri) * epsilon; // do not loose any range here
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return rv;
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}
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} // namespace
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} // namespace
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} // namespace
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