From 161bbfcd19b9f12f1f423815281a61d21cab142c Mon Sep 17 00:00:00 2001 From: Campbell Barton Date: Thu, 9 Jul 2015 02:56:04 +1000 Subject: Add BKE_nurb_bpoint_calc_normal --- source/blender/blenkernel/BKE_curve.h | 2 ++ source/blender/blenkernel/intern/curve.c | 23 +++++++++++++++++++++++ 2 files changed, 25 insertions(+) (limited to 'source/blender/blenkernel') diff --git a/source/blender/blenkernel/BKE_curve.h b/source/blender/blenkernel/BKE_curve.h index 9bae2ad948d..20b66a59b12 100644 --- a/source/blender/blenkernel/BKE_curve.h +++ b/source/blender/blenkernel/BKE_curve.h @@ -174,6 +174,8 @@ struct BPoint *BKE_nurb_bpoint_get_prev(struct Nurb *nu, struct BPoint *bp); void BKE_nurb_bezt_calc_normal(struct Nurb *nu, struct BezTriple *bezt, float r_normal[3]); void BKE_nurb_bezt_calc_plane(struct Nurb *nu, struct BezTriple *bezt, float r_plane[3]); +void BKE_nurb_bpoint_calc_normal(struct Nurb *nu, struct BPoint *bp, float r_normal[3]); + void BKE_nurb_handle_calc(struct BezTriple *bezt, struct BezTriple *prev, struct BezTriple *next, const bool is_fcurve); void BKE_nurb_handle_calc_simple(struct Nurb *nu, struct BezTriple *bezt); diff --git a/source/blender/blenkernel/intern/curve.c b/source/blender/blenkernel/intern/curve.c index 1a67ac76937..01e443cdb0d 100644 --- a/source/blender/blenkernel/intern/curve.c +++ b/source/blender/blenkernel/intern/curve.c @@ -873,6 +873,29 @@ void BKE_nurb_bezt_calc_plane(struct Nurb *nu, struct BezTriple *bezt, float r_p normalize_v3(r_plane); } +void BKE_nurb_bpoint_calc_normal(struct Nurb *nu, struct BPoint *bp, float r_normal[3]) +{ + BPoint *bp_prev = BKE_nurb_bpoint_get_prev(nu, bp); + BPoint *bp_next = BKE_nurb_bpoint_get_next(nu, bp); + + zero_v3(r_normal); + + if (bp_prev) { + float dir_prev[3]; + sub_v3_v3v3(dir_prev, bp_prev->vec, bp->vec); + normalize_v3(dir_prev); + add_v3_v3(r_normal, dir_prev); + } + if (bp_next) { + float dir_next[3]; + sub_v3_v3v3(dir_next, bp->vec, bp_next->vec); + normalize_v3(dir_next); + add_v3_v3(r_normal, dir_next); + } + + normalize_v3(r_normal); +} + /* ~~~~~~~~~~~~~~~~~~~~Non Uniform Rational B Spline calculations ~~~~~~~~~~~ */ -- cgit v1.2.3