// SPDX-FileCopyrightText: 2026 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#pragma once

// pi as a plain constexpr so it is usable everywhere:
//  - host code on MSVC, which does not define M_PI without _USE_MATH_DEFINES;
//  - CUDA device code, which is compiled as C++17 here, so PI
//    (C++20) is not available.
constexpr double PI = 3.14159265358979323846;