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

2 files changed, 6 insertions, 6 deletions

diff --git a/source/blender/blenlib/intern/math_base_inline.c b/source/blender/blenlib/intern/math_base_inline.c
index 90a91cbe26f..bb6bc0db00d 100644
--- a/source/blender/blenlib/intern/math_base_inline.c
+++ b/source/blender/blenlib/intern/math_base_inline.c
@@ -95,10 +95,10 @@ MINLINE float saacos(float fac)
 MINLINE float saasin(float fac)
 {
   if (UNLIKELY(fac <= -1.0f)) {
-    return (float)-M_PI / 2.0f;
+    return (float)-M_PI_2;
   }
   else if (UNLIKELY(fac >= 1.0f)) {
-    return (float)M_PI / 2.0f;
+    return (float)M_PI_2;
   }
   else {
     return asinf(fac);
@@ -131,10 +131,10 @@ MINLINE float saacosf(float fac)
 MINLINE float saasinf(float fac)
 {
   if (UNLIKELY(fac <= -1.0f)) {
-    return (float)-M_PI / 2.0f;
+    return (float)-M_PI_2;
   }
   else if (UNLIKELY(fac >= 1.0f)) {
-    return (float)M_PI / 2.0f;
+    return (float)M_PI_2;
   }
   else {
     return asinf(fac);
diff --git a/source/blender/blenlib/intern/math_vector.c b/source/blender/blenlib/intern/math_vector.c
index e71b1150d8f..da6a6dff16f 100644
--- a/source/blender/blenlib/intern/math_vector.c
+++ b/source/blender/blenlib/intern/math_vector.c
@@ -289,7 +289,7 @@ void mid_v3_v3v3_angle_weighted(float r[3], const float a[3], const float b[3])
   BLI_ASSERT_UNIT_V3(b);
 
   add_v3_v3v3(r, a, b);
-  angle = ((float)(1.0 / (M_PI / 2.0)) *
+  angle = ((float)M_2_PI *
            /* normally we would only multiply by 2,
             * but instead of an angle make this 0-1 factor */
            2.0f) *
@@ -305,7 +305,7 @@ void mid_v3_angle_weighted(float r[3])
   /* double check they are normalized */
   BLI_assert(len_squared_v3(r) <= 1.0f + FLT_EPSILON);
 
-  angle = ((float)(1.0 / (M_PI / 2.0)) *
+  angle = ((float)M_2_PI *
            /* normally we would only multiply by 2,
             * but instead of an angle make this 0-1 factor */
            2.0f) *