diff options
author | Campbell Barton <ideasman42@gmail.com> | 2016-07-11 08:28:39 +0300 |
---|---|---|
committer | Campbell Barton <ideasman42@gmail.com> | 2016-07-11 10:16:35 +0300 |
commit | b32408eff896307741498bee4ec5dacb5b6953ee (patch) | |
tree | d7518b470b1841d47d559642ce2d1af26fb99d97 /source/blender/blenlib | |
parent | e41abdb9076f351acb01bf73900e821334850b06 (diff) |
BLI_math: move interp_*_cubic to its own function
Diffstat (limited to 'source/blender/blenlib')
-rw-r--r-- | source/blender/blenlib/BLI_math_vector.h | 4 | ||||
-rw-r--r-- | source/blender/blenlib/intern/math_vector.c | 21 |
2 files changed, 25 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_math_vector.h b/source/blender/blenlib/BLI_math_vector.h index 4d546abe201..d15fe1a95dc 100644 --- a/source/blender/blenlib/BLI_math_vector.h +++ b/source/blender/blenlib/BLI_math_vector.h @@ -221,6 +221,10 @@ bool interp_v2_v2v2_slerp(float target[2], const float a[2], const float b[2], c void interp_v3_v3v3_slerp_safe(float target[3], const float a[3], const float b[3], const float t); void interp_v2_v2v2_slerp_safe(float target[2], const float a[2], const float b[2], const float t); +void interp_v2_v2v2v2v2_cubic( + float p[2], const float v1[2], const float v2[2], const float v3[2], const float v4[2], + const float u); + void interp_v3_v3v3_char(char target[3], const char a[3], const char b[3], const float t); void interp_v3_v3v3_uchar(unsigned char target[3], const unsigned char a[3], const unsigned char b[3], const float t); void interp_v4_v4v4_char(char target[4], const char a[4], const char b[4], const float t); diff --git a/source/blender/blenlib/intern/math_vector.c b/source/blender/blenlib/intern/math_vector.c index 988034349e0..95d5c9fde87 100644 --- a/source/blender/blenlib/intern/math_vector.c +++ b/source/blender/blenlib/intern/math_vector.c @@ -164,6 +164,27 @@ void interp_v2_v2v2_slerp_safe(float target[2], const float a[2], const float b[ } } +/** \name Cubic curve interpolation (bezier spline). + * \{ */ + +void interp_v2_v2v2v2v2_cubic( + float p[2], const float v1[2], const float v2[2], const float v3[2], const float v4[2], + const float u) +{ + float q0[2], q1[2], q2[2], r0[2], r1[2]; + + interp_v2_v2v2(q0, v1, v2, u); + interp_v2_v2v2(q1, v2, v3, u); + interp_v2_v2v2(q2, v3, v4, u); + + interp_v2_v2v2(r0, q0, q1, u); + interp_v2_v2v2(r1, q1, q2, u); + + interp_v2_v2v2(p, r0, r1, u); +} + +/** \} */ + /* weight 3 vectors, * 'w' must be unit length but is not a vector, just 3 weights */ void interp_v3_v3v3v3(float p[3], const float v1[3], const float v2[3], const float v3[3], const float w[3]) |