diff options
author | Campbell Barton <ideasman42@gmail.com> | 2013-07-08 04:51:30 +0400 |
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committer | Campbell Barton <ideasman42@gmail.com> | 2013-07-08 04:51:30 +0400 |
commit | 2c8087aa2a9853f9caabc052b2e753c28704172b (patch) | |
tree | b444c5ca7c03f2f266a941b7c501f989dac1d6b9 /source/blender/bmesh/operators | |
parent | 7d2030d23378cd4a6f0f0be0997324d67b3e642a (diff) |
fix [#36047] Recalculate normals produces faulty normals on certain simple meshes
The mesh in the report had 3 faces-user-edges, resolve the problem by not walking over these edges.
also don't recurse anymore (avoids realloc's).
Diffstat (limited to 'source/blender/bmesh/operators')
-rw-r--r-- | source/blender/bmesh/operators/bmo_utils.c | 158 |
1 files changed, 77 insertions, 81 deletions
diff --git a/source/blender/bmesh/operators/bmo_utils.c b/source/blender/bmesh/operators/bmo_utils.c index 5e61b8ea7ea..876e4a9fedc 100644 --- a/source/blender/bmesh/operators/bmo_utils.c +++ b/source/blender/bmesh/operators/bmo_utils.c @@ -282,125 +282,121 @@ void bmo_region_extend_exec(BMesh *bm, BMOperator *op) #define FACE_VIS 1 #define FACE_FLAG 2 -// #define FACE_MARK 4 /* UNUSED */ #define FACE_FLIP 8 -/* NOTE: these are the original recalc_face_normals comment in editmesh_mods.c, - * copied here for reference. */ - -/* based at a select-connected to witness loose objects */ - -/* count per edge the amount of faces - * find the ultimate left, front, upper face (not manhattan dist!!) - * also evaluate both triangle cases in quad, since these can be non-flat - * +/* * put normal to the outside, and set the first direction flags in edges * * then check the object, and set directions / direction-flags: but only for edges with 1 or 2 faces * this is in fact the 'select connected' * - * in case (selected) faces were not done: start over with 'find the ultimate ...' */ - -/* NOTE: this function uses recursion, which is a little unusual for a bmop - * function, but acceptable I think. */ + * in case all faces were not done: start over with 'find the ultimate ...' */ /* NOTE: BM_ELEM_TAG is used on faces to tell if they are flipped. */ void bmo_recalc_face_normals_exec(BMesh *bm, BMOperator *op) { - BMIter liter, liter2; - BMOIter siter; - BMFace *f, *startf; BMFace **fstack; STACK_DECLARE(fstack); - BMLoop *l, *l2; - float maxx, maxx_test, cent[3]; - const bool use_flip = BMO_slot_bool_get(op->slots_in, "use_face_tag"); - - startf = NULL; - maxx = -1.0e10; + const bool use_face_tag = BMO_slot_bool_get(op->slots_in, "use_face_tag"); + const unsigned int tot_faces = BMO_slot_buffer_count(op->slots_in, "faces"); + unsigned int tot_touch = 0; BMO_slot_buffer_flag_enable(bm, op->slots_in, "faces", BM_FACE, FACE_FLAG); - /* find a starting face */ - BMO_ITER (f, &siter, op->slots_in, "faces", BM_FACE) { + fstack = MEM_mallocN(sizeof(*fstack) * tot_faces, __func__); - /* clear dirty flag */ - BM_elem_flag_disable(f, BM_ELEM_TAG); + while (tot_touch != tot_faces) { + BMOIter siter; + float f_len_best = -FLT_MAX; + BMFace *f, *f_start = NULL; + float f_start_cent[3]; - if (BMO_elem_flag_test(bm, f, FACE_VIS)) - continue; + /* find a starting face */ + BMO_ITER (f, &siter, op->slots_in, "faces", BM_FACE) { + float f_cent[3]; + float f_len_test; + + /* clear dirty flag */ + BM_elem_flag_disable(f, BM_ELEM_TAG); - if (!startf) startf = f; + if (BMO_elem_flag_test(bm, f, FACE_VIS)) + continue; - BM_face_calc_center_bounds(f, cent); + if (!f_start) f_start = f; - if ((maxx_test = dot_v3v3(cent, cent)) > maxx) { - maxx = maxx_test; - startf = f; + BM_face_calc_center_bounds(f, f_cent); + + if ((f_len_test = len_squared_v3(f_cent)) > f_len_best) { + f_len_best = f_len_test; + f_start = f; + copy_v3_v3(f_start_cent, f_cent); + } } - } - if (!startf) return; + /* check sanity (while loop ensures) */ + BLI_assert(f_start != NULL); - BM_face_calc_center_bounds(startf, cent); + /* make sure the starting face has the correct winding */ + if (dot_v3v3(f_start_cent, f_start->no) < 0.0f) { + BM_face_normal_flip(bm, f_start); + BMO_elem_flag_toggle(bm, f_start, FACE_FLIP); - /* make sure the starting face has the correct winding */ - if (dot_v3v3(cent, startf->no) < 0.0f) { - BM_face_normal_flip(bm, startf); - BMO_elem_flag_toggle(bm, startf, FACE_FLIP); + if (use_face_tag) { + BM_elem_flag_toggle(f_start, BM_ELEM_TAG); + } + } - if (use_flip) - BM_elem_flag_toggle(startf, BM_ELEM_TAG); - } - - /* now that we've found our starting face, make all connected faces - * have the same winding. this is done recursively, using a manual - * stack (if we use simple function recursion, we'd end up overloading - * the stack on large meshes). */ - fstack = MEM_mallocN(sizeof(*fstack) * BMO_slot_buffer_count(op->slots_in, "faces"), __func__); - STACK_INIT(fstack); - STACK_PUSH(fstack, startf); - BMO_elem_flag_enable(bm, startf, FACE_VIS); - - while ((f = STACK_POP(fstack))) { - BM_ITER_ELEM (l, &liter, f, BM_LOOPS_OF_FACE) { - BM_ITER_ELEM (l2, &liter2, l, BM_LOOPS_OF_LOOP) { - if (!BMO_elem_flag_test(bm, l2->f, FACE_FLAG) || l2 == l) + /* now that we've found our starting face, make all connected faces + * have the same winding. this is done recursively, using a manual + * stack (if we use simple function recursion, we'd end up overloading + * the stack on large meshes). */ + STACK_INIT(fstack); + + STACK_PUSH(fstack, f_start); + BMO_elem_flag_enable(bm, f_start, FACE_VIS); + tot_touch++; + + while ((f = STACK_POP(fstack))) { + BMIter liter; + BMLoop *l; + + BM_ITER_ELEM (l, &liter, f, BM_LOOPS_OF_FACE) { + BMLoop *l_other = l->radial_next; + + if ((l_other == l) || l_other->radial_next != l) { continue; + } - if (!BMO_elem_flag_test(bm, l2->f, FACE_VIS)) { - BMO_elem_flag_enable(bm, l2->f, FACE_VIS); + if (BMO_elem_flag_test(bm, l_other->f, FACE_FLAG)) { + if (!BMO_elem_flag_test(bm, l_other->f, FACE_VIS)) { + BMO_elem_flag_enable(bm, l_other->f, FACE_VIS); + tot_touch++; - if (l2->v == l->v) { - BM_face_normal_flip(bm, l2->f); - - BMO_elem_flag_toggle(bm, l2->f, FACE_FLIP); - if (use_flip) - BM_elem_flag_toggle(l2->f, BM_ELEM_TAG); - } - else if (BM_elem_flag_test(l2->f, BM_ELEM_TAG) || BM_elem_flag_test(l->f, BM_ELEM_TAG)) { - if (use_flip) { - BM_elem_flag_disable(l->f, BM_ELEM_TAG); - BM_elem_flag_disable(l2->f, BM_ELEM_TAG); + + if (l_other->v == l->v) { + BM_face_normal_flip(bm, l_other->f); + + BMO_elem_flag_toggle(bm, l_other->f, FACE_FLIP); + if (use_face_tag) { + BM_elem_flag_toggle(l_other->f, BM_ELEM_TAG); + } } + else if (BM_elem_flag_test(l_other->f, BM_ELEM_TAG) || BM_elem_flag_test(l->f, BM_ELEM_TAG)) { + if (use_face_tag) { + BM_elem_flag_disable(l->f, BM_ELEM_TAG); + BM_elem_flag_disable(l_other->f, BM_ELEM_TAG); + } + } + + STACK_PUSH(fstack, l_other->f); } - - STACK_PUSH(fstack, l2->f); } } } } MEM_freeN(fstack); - - /* check if we have faces yet to do. if so, recurse */ - BMO_ITER (f, &siter, op->slots_in, "faces", BM_FACE) { - if (!BMO_elem_flag_test(bm, f, FACE_VIS)) { - bmo_recalc_face_normals_exec(bm, op); - break; - } - } } void bmo_smooth_vert_exec(BMesh *UNUSED(bm), BMOperator *op) |