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added simpler eval interface for uniform splines

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This commit is contained in:
Ahmet Inan 2020-01-17 15:06:48 +01:00
commit 4f3bd984d2
1 changed files with 12 additions and 0 deletions
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12
spline.hh
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@ -113,6 +113,18 @@ struct CubicHermiteSpline
:
h00(t) * y[n-2] + h10(t) * central(y+n-2) + h01(t) * y[n-1] + h11(t) * left(y+n-1);
}
static OTYPE eval(const OTYPE *y, ITYPE x, int n, ITYPE x0 = 0, ITYPE dx = 1)
{
ITYPE tx = (x - x0) / dx;
int k = tx;
ITYPE t = tx - ITYPE(k);
return k < 0 ?
eval(y, tx, 0, n)
: k < n-1 ?
eval(y, t, k, n)
:
eval(y, tx-ITYPE(n-2), n-2, n);
}
};
}