32 lines
786 B
C++
32 lines
786 B
C++
//! @file funcs.cpp file containing miscellaneous numerical functions.
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/*
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* Copyright 2001-2003 California Institute of Technology
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* See file License.txt for licensing information
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*/
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#include "cantera/numerics/funcs.h"
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using namespace std;
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namespace Cantera
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{
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doublereal linearInterp(doublereal x, const vector_fp& xpts,
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const vector_fp& fpts)
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{
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if (x <= xpts[0]) {
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return fpts[0];
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}
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if (x >= xpts.back()) {
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return fpts.back();
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}
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auto loc = lower_bound(xpts.begin(), xpts.end(), x);
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int iloc = int(loc - xpts.begin()) - 1;
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doublereal ff = fpts[iloc] +
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(x - xpts[iloc])*(fpts[iloc + 1]
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- fpts[iloc])/(xpts[iloc + 1] - xpts[iloc]);
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return ff;
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}
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}
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