QuadApprox.cc

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/*
 * LSST Data Management System
 * Copyright 2017 AURA/LSST.
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#include <vector>

#include "astshim/detail/utils.h"
#include "astshim/Mapping.h"
#include "astshim/QuadApprox.h"

namespace ast {

QuadApprox::QuadApprox(Mapping const& map, std::vector<double> const& lbnd, std::vector<double> const& ubnd,
                       int nx, int ny)
        : fit(6 * map.getNOut()), rms(0) {
    int const nIn = map.getNIn();
    detail::assertEqual(nIn, "map.getNIn()", 2, "required nIn");
    detail::assertEqual(lbnd.size(), "lbnd.size", static_cast<std::size_t>(nIn), "nIn");
    detail::assertEqual(ubnd.size(), "ubnd.size", static_cast<std::size_t>(nIn), "nIn");
    fit.reserve(6 * map.getNOut());
    bool isok = astQuadApprox(map.getRawPtr(), lbnd.data(), ubnd.data(), nx, ny, fit.data(), &rms);
    if (!isok) {
        throw std::runtime_error("Failed to fit a quadratic approximation");
    }
}

}  // namespace ast