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portability: replace M_PI / std::numbers::pi with a host+device-safe PI

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M_PI is a POSIX <math.h> extension that MSVC does not define without
_USE_MATH_DEFINES. std::numbers::pi (introduced in the viewer guard commit) is
C++20, but CUDA here is compiled as C++17 (CMAKE_CUDA_STANDARD 17) and several
common/ headers are pulled into .cu device translation units, so std::numbers is
not available there.

Add common/JFJochMath.h with a dependency-free `constexpr double PI` that works
in host code (including MSVC), in CUDA device code, and under C++17/20, and use
it everywhere:
- common/ and image_analysis/ (incl. CUDA .cu): 78 M_PI occurrences, 22 files
- broker/OpenAPIConvert.cpp
- viewer/: the 5 files that used std::numbers::pi now use PI, for one consistent
  convention across the codebase

Verified to build: JFJochImageAnalysis (incl. CUDA), jfjoch_viewer, JFJochBroker.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
leonarski_f
2026-06-18 14:54:01 +02:00
co-authored by Claude Opus 4.8
parent d0a1175c65
commit 5d9e1be814
29 changed files with 120 additions and 87 deletions
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common/AzimuthalIntegrationMapping.cpp
+6 -5
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@@ -1,6 +1,7 @@
// SPDX-FileCopyrightText: 2025 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only
#include "JFJochMath.h"
#include <cmath>
#include <thread>
#include <future>
@@ -145,8 +146,8 @@ void AzimuthalIntegrationMapping::SetupPixel(const DiffractionGeometry &geom,
corrections[pxl] = corr;
if (d > 0) {
float q = 2.0f * static_cast<float>(M_PI) / d;
pixel_to_bin[pxl] = settings.GetBin(q, phi_rad * 180.0 / M_PI);
float q = 2.0f * static_cast<float>(PI) / d;
pixel_to_bin[pxl] = settings.GetBin(q, phi_rad * 180.0 / PI);
}
}
@@ -187,9 +188,9 @@ void AzimuthalIntegrationMapping::UpdateMaxBinNumber() {
for (int j = 0; j < settings.GetAzimuthalBinCount(); j++) {
for (int i = 0; i < settings.GetQBinCount(); i++) {
bin_to_q[j * settings.GetQBinCount() + i] = static_cast<float>(settings.GetQSpacing_recipA() * (i + 0.5) + settings.GetLowQ_recipA());
bin_to_d[j * settings.GetQBinCount() + i] = 2.0f * static_cast<float>(M_PI) / bin_to_q[j * settings.GetQBinCount() + i];
bin_to_2theta[j * settings.GetQBinCount() + i] = 2.0f * asinf(bin_to_q[i] * wavelength / (4.0f * static_cast<float>(M_PI))) * 180.0f /
static_cast<float>(M_PI);
bin_to_d[j * settings.GetQBinCount() + i] = 2.0f * static_cast<float>(PI) / bin_to_q[j * settings.GetQBinCount() + i];
bin_to_2theta[j * settings.GetQBinCount() + i] = 2.0f * asinf(bin_to_q[i] * wavelength / (4.0f * static_cast<float>(PI))) * 180.0f /
static_cast<float>(PI);
bin_to_phi[j * settings.GetQBinCount() + i] = static_cast<float>(j) * 360.0f / static_cast<float>(settings.GetAzimuthalBinCount());
}
}