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Add BKE_nurb_bpoint_calc_normal

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This commit is contained in:
Campbell Barton
2015-07-09 02:56:04 +10:00
parent 4a328a7689
commit 161bbfcd19
2 changed files with 25 additions and 0 deletions
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23
source/blender/blenkernel/intern/curve.c
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@@ -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 ~~~~~~~~~~~ */