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, 1 deletions

diff --git a/proto-ft/ftnoir_protocol_ft.cpp b/proto-ft/ftnoir_protocol_ft.cpp
index d0e89753..fe96db93 100644
--- a/proto-ft/ftnoir_protocol_ft.cpp
+++ b/proto-ft/ftnoir_protocol_ft.cpp
@@ -9,6 +9,7 @@
 #include "ftnoir_protocol_ft.h"
 #include "csv/csv.h"
 #include "opentrack-library-path.h"
+#include "opentrack-compat/pi-constant.hpp"
 
 check_for_first_run FTNoIR_Protocol::runonce_check = check_for_first_run();
 
@@ -96,7 +97,7 @@ void FTNoIR_Protocol::pose(const double* headpose)
 
 float FTNoIR_Protocol::degrees_to_rads(double degrees)
 {
-    static constexpr double pi = 3.14159265358979323846;
+    static constexpr double pi = OPENTRACK_PI;
     return float(degrees*pi/180);
 }