diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_vector_inline.c')
-rw-r--r-- | source/blender/blenlib/intern/math_vector_inline.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_vector_inline.c b/source/blender/blenlib/intern/math_vector_inline.c index dc9a32222f7..9c5d8f3261f 100644 --- a/source/blender/blenlib/intern/math_vector_inline.c +++ b/source/blender/blenlib/intern/math_vector_inline.c @@ -515,6 +515,29 @@ MINLINE float normalize_v3_v3(float r[3], const float a[3]) return d; } +MINLINE double normalize_v3_d(double n[3]) +{ + double d= n[0]*n[0] + n[1]*n[1] + n[2]*n[2]; + + /* a larger value causes normalize errors in a + scaled down models with camera xtreme close */ + if(d > 1.0e-35) { + double mul; + + d= sqrt(d); + mul = 1.0 / d; + + n[0] *= mul; + n[1] *= mul; + n[2] *= mul; + } else { + n[0] = n[1] = n[2] = 0; + d= 0.0; + } + + return d; +} + MINLINE float normalize_v3(float n[3]) { return normalize_v3_v3(n, n); |