Commit: 17941860530693dfce76a4bf3d25e0e29610a20b
Author: Bastien Montagne
Date: Fri Jan 9 12:23:34 2015 +0100
Branches: master
https://developer.blender.org/rB17941860530693dfce76a4bf3d25e0e29610a20b
BLI_math: add vector's dot_v3v3v3() func, for when you have three points
instead of two vectors.
===================================================================
M source/blender/blenlib/BLI_math_vector.h
M source/blender/blenlib/intern/math_vector_inline.c
===================================================================
diff --git a/source/blender/blenlib/BLI_math_vector.h
b/source/blender/blenlib/BLI_math_vector.h
index 6885a5a..4455e72 100644
--- a/source/blender/blenlib/BLI_math_vector.h
+++ b/source/blender/blenlib/BLI_math_vector.h
@@ -148,6 +148,7 @@ MINLINE void negate_v3_short(short r[3]);
MINLINE float dot_v2v2(const float a[2], const float b[2])
ATTR_WARN_UNUSED_RESULT;
MINLINE float dot_v3v3(const float a[3], const float b[3])
ATTR_WARN_UNUSED_RESULT;
+MINLINE float dot_v3v3v3(const float p[3], const float a[3], const float b[3])
ATTR_WARN_UNUSED_RESULT;
MINLINE float dot_v4v4(const float a[4], const float b[4])
ATTR_WARN_UNUSED_RESULT;
MINLINE float cross_v2v2(const float a[2], const float b[2])
ATTR_WARN_UNUSED_RESULT;
diff --git a/source/blender/blenlib/intern/math_vector_inline.c
b/source/blender/blenlib/intern/math_vector_inline.c
index da9d5bd..6b6a311 100644
--- a/source/blender/blenlib/intern/math_vector_inline.c
+++ b/source/blender/blenlib/intern/math_vector_inline.c
@@ -621,6 +621,18 @@ MINLINE float dot_v3v3(const float a[3], const float b[3])
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
+MINLINE float dot_v3v3v3(const float p[3], const float a[3], const float b[3])
+{
+ float vec1[3], vec2[3];
+
+ sub_v3_v3v3(vec1, a, p);
+ sub_v3_v3v3(vec2, b, p);
+ if (is_zero_v3(vec1) || is_zero_v3(vec2)) {
+ return 0.0f;
+ }
+ return dot_v3v3(vec1, vec2);
+}
+
MINLINE float dot_v4v4(const float a[4], const float b[4])
{
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
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