kernel.hpp

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/// @file kernel.hpp
/// @brief SPH smoothing kernels for 2D WCSPH — delegates to num::SPHKernel<2>.
///
/// The implementation lives in include/spatial/sph_kernel.hpp.
/// This file keeps the Kernel:: API used by the 2D backends unchanged.
#pragma once
 
#include "spatial/sph_kernel.hpp"
 
namespace physics {
 
struct Kernel {
    static float W(float r, float h) {
        return num::SPHKernel<2>::W(r, h);
    }
    static float dW_dr(float r, float h) {
        return num::SPHKernel<2>::dW_dr(r, h);
    }
    static float Spiky_dW_dr(float r, float h) {
        return num::SPHKernel<2>::Spiky_dW_dr(r, h);
    }
    static void Spiky_gradW(float rx, float ry, float r, float h,
                             float& gx, float& gy) {
        auto g = num::SPHKernel<2>::Spiky_gradW({rx, ry}, r, h);
        gx = g[0]; gy = g[1];
    }
};
 
} // namespace physics