some: replace hardcoded pi values with the same pi constant

We can't depend on M_PI existing after including cmath.

3 files changed, 8 insertions, 5 deletions

diff --git a/tracker-pt/ftnoir_tracker_pt.h b/tracker-pt/ftnoir_tracker_pt.h
index 40f9ad4a..d2f69ac2 100644
--- a/tracker-pt/ftnoir_tracker_pt.h
+++ b/tracker-pt/ftnoir_tracker_pt.h
@@ -17,6 +17,7 @@
 #include "pt_video_widget.h"
 #include "opentrack-compat/timer.hpp"
 #include "opentrack/opencv-camera-dialog.hpp"
+#include "opentrack-compat/pi-constant.hpp"
 
 #include <QThread>
 #include <QMutex>
@@ -32,7 +33,7 @@ class TrackerDialog_PT;
 // Constantly processes the tracking chain in a separate thread
 class Tracker_PT : public QThread, public ITracker, private pt_types
 {
-    static constexpr double pi = 3.14159265359;
+    static constexpr double pi = OPENTRACK_PI;
 
     Q_OBJECT
     friend class camera_dialog;
@@ -76,8 +77,8 @@ private:
     volatile bool ever_success;
     volatile unsigned char commands;
 
-    static constexpr f rad2deg = f(180/3.14159265);
-    //static constexpr float deg2rad = float(3.14159265/180);
+    static constexpr f rad2deg = f(180/OPENTRACK_PI);
+    //static constexpr float deg2rad = float(OPENTRACK_PI/180);
 };
 
 class TrackerDll : public Metadata
diff --git a/tracker-pt/ftnoir_tracker_pt_settings.h b/tracker-pt/ftnoir_tracker_pt_settings.h
index 830bf92e..f5256f18 100644
--- a/tracker-pt/ftnoir_tracker_pt_settings.h
+++ b/tracker-pt/ftnoir_tracker_pt_settings.h
@@ -8,6 +8,7 @@
 
 #pragma once
 
+#include "opentrack-compat/pi-constant.hpp"
 #include <limits>
 #include <opencv2/core.hpp>
 
@@ -16,7 +17,7 @@ struct pt_types
     using f = double;
 
     static constexpr f eps = std::numeric_limits<f>::epsilon();
-    static constexpr f pi = f(3.14159265358979323846);
+    static constexpr f pi = f(OPENTRACK_PI);
 
     template<int n> using vec = cv::Vec<f, n>;
     using vec2 = vec<2>;
diff --git a/tracker-pt/point_extractor.h b/tracker-pt/point_extractor.h
index 52b4cb32..16740b91 100644
--- a/tracker-pt/point_extractor.h
+++ b/tracker-pt/point_extractor.h
@@ -13,6 +13,7 @@
 #include <opencv2/imgproc/imgproc.hpp>
 
 #include "ftnoir_tracker_pt_settings.h"
+#include "opentrack-compat/pi-constant.hpp"
 #include <QMutex>
 
 #include <vector>
@@ -29,7 +30,7 @@ public:
 
     settings_pt s;
 private:
-    static constexpr double pi = 3.14159265359;
+    static constexpr double pi = OPENTRACK_PI;
 
     std::vector<vec2> points;
     QMutex mtx;