update boost

linx64/include/boost/math/interpolators/bilinear_uniform.hpp

@@ -0,0 +1,54 @@
+// Copyright Nick Thompson, 2021
+// Use, modification and distribution are subject to the
+// Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// This implements bilinear interpolation on a uniform grid.
+// If dx and dy are both positive, then the (x,y) = (x0, y0) is associated with data index 0 (herein referred to as f[0])
+// The point (x0 + dx, y0) is associated with f[1], and (x0 + i*dx, y0) is associated with f[i],
+// i.e., we are assuming traditional C row major order.
+// The y coordinate increases *downward*, as is traditional in 2D computer graphics.
+// This is *not* how people generally think in numerical analysis (although it *is* how they lay out matrices).
+// Providing the capability of a grid rotation is too expensive and not ergonomic; you'll need to perform any rotations at the call level.
+
+// For clarity, the value f(x0 + i*dx, y0 + j*dy) must be stored in the f[j*cols + i] position.
+
+#ifndef BOOST_MATH_INTERPOLATORS_BILINEAR_UNIFORM_HPP
+#define BOOST_MATH_INTERPOLATORS_BILINEAR_UNIFORM_HPP
+
+#include <utility>
+#include <memory>
+#include <boost/math/interpolators/detail/bilinear_uniform_detail.hpp>
+
+namespace boost::math::interpolators {
+
+template <class RandomAccessContainer>
+class bilinear_uniform
+{
+public:
+    using Real = typename RandomAccessContainer::value_type;
+    using Z = typename RandomAccessContainer::size_type;
+
+    bilinear_uniform(RandomAccessContainer && fieldData, Z rows, Z cols, Real dx = 1, Real dy = 1, Real x0 = 0, Real y0 = 0)
+    : m_imp(std::make_shared<detail::bilinear_uniform_imp<RandomAccessContainer>>(std::move(fieldData), rows, cols, dx, dy, x0, y0))
+    {
+    }
+
+    Real operator()(Real x, Real y) const
+    {
+        return m_imp->operator()(x,y);
+    }
+
+
+    friend std::ostream& operator<<(std::ostream& out, bilinear_uniform<RandomAccessContainer> const & bu) {
+        out << *bu.m_imp;
+        return out;
+    }
+
+private:
+    std::shared_ptr<detail::bilinear_uniform_imp<RandomAccessContainer>> m_imp;
+};
+
+}
+#endif