From dc399ee846dfe31c249ce1f7fe27fabe5afac2a8 Mon Sep 17 00:00:00 2001
From: Hallam Roberts <MysteryPancake>
Date: Fri, 11 Mar 2022 16:14:05 +0100
Subject: Cleanup: use M_PI_2 and M_PI_4 where possible

The constant M_PI_4 is added to GLSL to ensure it works there too.

Differential Revision: https://developer.blender.org/D14288
---
 source/blender/freestyle/intern/geometry/matrix_util.cpp  | 2 +-
 source/blender/freestyle/intern/winged_edge/Curvature.cpp | 4 ++--
 source/blender/freestyle/intern/winged_edge/WEdge.h       | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

(limited to 'source/blender/freestyle')

diff --git a/source/blender/freestyle/intern/geometry/matrix_util.cpp b/source/blender/freestyle/intern/geometry/matrix_util.cpp
index ecf5443a957..35503a37685 100644
--- a/source/blender/freestyle/intern/geometry/matrix_util.cpp
+++ b/source/blender/freestyle/intern/geometry/matrix_util.cpp
@@ -106,7 +106,7 @@ void semi_definite_symmetric_eigen(const double *mat, int n, double *eigen_vec,
           delta = a_ll - a_mm;
 
           if (delta == 0.0) {
-            x = -M_PI / 4;
+            x = -M_PI_4;
           }
           else {
             x = -atan((a_lm + a_lm) / delta) / 2.0;
diff --git a/source/blender/freestyle/intern/winged_edge/Curvature.cpp b/source/blender/freestyle/intern/winged_edge/Curvature.cpp
index fba3110907a..9086593a945 100644
--- a/source/blender/freestyle/intern/winged_edge/Curvature.cpp
+++ b/source/blender/freestyle/intern/winged_edge/Curvature.cpp
@@ -474,10 +474,10 @@ inline static real angle(WOEdge *h)
   const Vec3r v = h->GetVec();
   real sine = (n1 ^ n2) * v / v.norm();
   if (sine >= 1.0) {
-    return M_PI / 2.0;
+    return M_PI_2;
   }
   if (sine <= -1.0) {
-    return -M_PI / 2.0;
+    return -M_PI_2;
   }
   return ::asin(sine);
 }
diff --git a/source/blender/freestyle/intern/winged_edge/WEdge.h b/source/blender/freestyle/intern/winged_edge/WEdge.h
index b77381bd4e5..6d39446056f 100644
--- a/source/blender/freestyle/intern/winged_edge/WEdge.h
+++ b/source/blender/freestyle/intern/winged_edge/WEdge.h
@@ -1400,11 +1400,11 @@ inline void WOEdge::setVecAndAngle()
     if (_paFace && _pbFace) {
       float sine = (_pbFace->GetNormal() ^ _paFace->GetNormal()) * _vec / _vec.norm();
       if (sine >= 1.0) {
-        _angle = M_PI / 2.0;
+        _angle = M_PI_2;
         return;
       }
       if (sine <= -1.0) {
-        _angle = -M_PI / 2.0;
+        _angle = -M_PI_2;
         return;
       }
       _angle = ::asin(sine);
-- 
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