some: replace hardcoded pi values with the same pi constant

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

1 files changed, 2 insertions, 5 deletions

diff --git a/tracker-rift-080/ftnoir_tracker_rift_080.cpp b/tracker-rift-080/ftnoir_tracker_rift_080.cpp
index c1a07407..94c8dc41 100644
--- a/tracker-rift-080/ftnoir_tracker_rift_080.cpp
+++ b/tracker-rift-080/ftnoir_tracker_rift_080.cpp
@@ -4,12 +4,9 @@
 #include "OVR_CAPI.h"
 #include "Extras/OVR_Math.h"
 #include "OVR_CAPI_0_8_0.h"
+#include "opentrack-compat/pi-constant.hpp"
 #include <cstdio>
 
-#ifndef M_PI
-#   define M_PI 3.14159265358979323846
-#endif
-
 using namespace OVR;
 
 Rift_Tracker::Rift_Tracker() : old_yaw(0), hmd(nullptr)
@@ -63,7 +60,7 @@ void Rift_Tracker::data(double *data)
                     yaw_ += s.constant_drift;
                 old_yaw = yaw_;
             }
-            static constexpr double d2r = 180 / M_PI;
+            static constexpr double d2r = 180 / OPENTRACK_PI;
             data[Yaw] = yaw_                   * -d2r;
             data[Pitch] = double(pitch)        *  d2r;
             data[Roll] = double(roll)          *  d2r;