[Bf-blender-cvs] [4719836eca2] blender-v2.92-release: BLI_math: add mid_v2_v2v2v2

[Campbell Barton]

Commit: 4719836eca2e661ac79fbd1448fdc876b62af458
Author: Campbell Barton
Date:   Thu Feb 11 08:27:28 2021 +1100
Branches: blender-v2.92-release
https://developer.blender.org/rB4719836eca2e661ac79fbd1448fdc876b62af458

BLI_math: add mid_v2_v2v2v2

===================================================================

M	source/blender/blenlib/BLI_math_vector.h
M	source/blender/blenlib/intern/math_vector.c

===================================================================

diff --git a/source/blender/blenlib/BLI_math_vector.h b/source/blender/blenlib/BLI_math_vector.h
index 0bddff9101e..16585e34419 100644
--- a/source/blender/blenlib/BLI_math_vector.h
+++ b/source/blender/blenlib/BLI_math_vector.h
@@ -310,6 +310,7 @@ void interp_v4_v4v4_uchar(unsigned char target[4],
 void mid_v3_v3v3(float r[3], const float a[3], const float b[3]);
 void mid_v2_v2v2(float r[2], const float a[2], const float b[2]);
 void mid_v3_v3v3v3(float v[3], const float v1[3], const float v2[3], const float v3[3]);
+void mid_v2_v2v2v2(float v[2], const float v1[2], const float v2[2], const float v3[2]);
 void mid_v3_v3v3v3v3(
     float v[3], const float v1[3], const float v2[3], const float v3[3], const float v4[3]);
 void mid_v3_v3_array(float r[3], const float (*vec_arr)[3], const unsigned int nbr);
diff --git a/source/blender/blenlib/intern/math_vector.c b/source/blender/blenlib/intern/math_vector.c
index 5f3297134c6..da16fb4a9fb 100644
--- a/source/blender/blenlib/intern/math_vector.c
+++ b/source/blender/blenlib/intern/math_vector.c
@@ -281,6 +281,12 @@ void mid_v2_v2v2(float r[2], const float a[2], const float b[2])
   r[1] = 0.5f * (a[1] + b[1]);
 }
 
+void mid_v2_v2v2v2(float v[2], const float v1[2], const float v2[2], const float v3[2])
+{
+  v[0] = (v1[0] + v2[0] + v3[0]) / 3.0f;
+  v[1] = (v1[1] + v2[1] + v3[1]) / 3.0f;
+}
+
 void mid_v3_v3v3v3(float v[3], const float v1[3], const float v2[3], const float v3[3])
 {
   v[0] = (v1[0] + v2[0] + v3[0]) / 3.0f;