diff options
Diffstat (limited to 'source/blender/blenkernel/intern/curve.c')
| -rw-r--r-- | source/blender/blenkernel/intern/curve.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/curve.c b/source/blender/blenkernel/intern/curve.c index 5d2c85e5825..5fba308e3df 100644 --- a/source/blender/blenkernel/intern/curve.c +++ b/source/blender/blenkernel/intern/curve.c @@ -3393,6 +3393,144 @@ bool BKE_nurb_order_clamp_v(struct Nurb *nu) return change; } +bool BKE_nurb_type_convert(Nurb *nu, const short type, const bool use_handles) +{ + BezTriple *bezt; + BPoint *bp; + int a, c, nr; + + if (nu->type == CU_POLY) { + if (type == CU_BEZIER) { /* to Bezier with vecthandles */ + nr = nu->pntsu; + bezt = (BezTriple *)MEM_callocN(nr * sizeof(BezTriple), "setsplinetype2"); + nu->bezt = bezt; + a = nr; + bp = nu->bp; + while (a--) { + copy_v3_v3(bezt->vec[1], bp->vec); + bezt->f1 = bezt->f2 = bezt->f3 = bp->f1; + bezt->h1 = bezt->h2 = HD_VECT; + bezt->weight = bp->weight; + bezt->radius = bp->radius; + bp++; + bezt++; + } + MEM_freeN(nu->bp); + nu->bp = NULL; + nu->pntsu = nr; + nu->type = CU_BEZIER; + BKE_nurb_handles_calc(nu); + } + else if (type == CU_NURBS) { + nu->type = CU_NURBS; + nu->orderu = 4; + nu->flagu &= CU_NURB_CYCLIC; /* disable all flags except for cyclic */ + BKE_nurb_knot_calc_u(nu); + a = nu->pntsu * nu->pntsv; + bp = nu->bp; + while (a--) { + bp->vec[3] = 1.0; + bp++; + } + } + } + else if (nu->type == CU_BEZIER) { /* Bezier */ + if (type == CU_POLY || type == CU_NURBS) { + nr = use_handles ? (3 * nu->pntsu) : nu->pntsu; + nu->bp = MEM_callocN(nr * sizeof(BPoint), "setsplinetype"); + a = nu->pntsu; + bezt = nu->bezt; + bp = nu->bp; + while (a--) { + if ((type == CU_POLY && bezt->h1 == HD_VECT && bezt->h2 == HD_VECT) || (use_handles == false)) { + /* vector handle becomes 1 poly vertice */ + copy_v3_v3(bp->vec, bezt->vec[1]); + bp->vec[3] = 1.0; + bp->f1 = bezt->f2; + if (use_handles) nr -= 2; + bp->radius = bezt->radius; + bp->weight = bezt->weight; + bp++; + } + else { + char *f = &bezt->f1; + for (c = 0; c < 3; c++, f++) { + copy_v3_v3(bp->vec, bezt->vec[c]); + bp->vec[3] = 1.0; + bp->f1 = *f; + bp->radius = bezt->radius; + bp->weight = bezt->weight; + bp++; + } + } + bezt++; + } + MEM_freeN(nu->bezt); + nu->bezt = NULL; + nu->pntsu = nr; + nu->pntsv = 1; + nu->orderu = 4; + nu->orderv = 1; + nu->type = type; + +#if 0 /* UNUSED */ + if (nu->flagu & CU_NURB_CYCLIC) c = nu->orderu - 1; + else c = 0; +#endif + + if (type == CU_NURBS) { + nu->flagu &= CU_NURB_CYCLIC; /* disable all flags except for cyclic */ + nu->flagu |= CU_NURB_BEZIER; + BKE_nurb_knot_calc_u(nu); + } + } + } + else if (nu->type == CU_NURBS) { + if (type == CU_POLY) { + nu->type = CU_POLY; + if (nu->knotsu) MEM_freeN(nu->knotsu); /* python created nurbs have a knotsu of zero */ + nu->knotsu = NULL; + if (nu->knotsv) MEM_freeN(nu->knotsv); + nu->knotsv = NULL; + } + else if (type == CU_BEZIER) { /* to Bezier */ + nr = nu->pntsu / 3; + + if (nr < 2) { + return false; /* conversion impossible */ + } + else { + bezt = MEM_callocN(nr * sizeof(BezTriple), "setsplinetype2"); + nu->bezt = bezt; + a = nr; + bp = nu->bp; + while (a--) { + copy_v3_v3(bezt->vec[0], bp->vec); + bezt->f1 = bp->f1; + bp++; + copy_v3_v3(bezt->vec[1], bp->vec); + bezt->f2 = bp->f1; + bp++; + copy_v3_v3(bezt->vec[2], bp->vec); + bezt->f3 = bp->f1; + bezt->radius = bp->radius; + bezt->weight = bp->weight; + bp++; + bezt++; + } + MEM_freeN(nu->bp); + nu->bp = NULL; + MEM_freeN(nu->knotsu); + nu->knotsu = NULL; + nu->pntsu = nr; + nu->type = CU_BEZIER; + } + } + } + + return true; +} + /* Get edit nurbs or normal nurbs list */ ListBase *BKE_curve_nurbs_get(Curve *cu) { |