diff options
| -rw-r--r-- | source/blender/blenkernel/BKE_mesh.h | 7 | ||||
| -rw-r--r-- | source/blender/blenkernel/intern/mesh_evaluate.c | 214 | ||||
| -rw-r--r-- | source/blender/bmesh/intern/bmesh_mesh.c | 49 | ||||
| -rw-r--r-- | source/blender/bmesh/intern/bmesh_mesh.h | 2 | ||||
| -rw-r--r-- | source/blender/editors/mesh/mesh_data.c | 29 |
5 files changed, 230 insertions, 71 deletions
diff --git a/source/blender/blenkernel/BKE_mesh.h b/source/blender/blenkernel/BKE_mesh.h index 2fd000ebaae..31d889863b2 100644 --- a/source/blender/blenkernel/BKE_mesh.h +++ b/source/blender/blenkernel/BKE_mesh.h @@ -196,6 +196,13 @@ void BKE_mesh_loop_tangents_ex( void BKE_mesh_loop_tangents( struct Mesh *mesh, const char *uvmap, float (*r_looptangents)[4], struct ReportList *reports); +void BKE_edges_sharp_from_angle_set( + const struct MVert *mverts, const int numVerts, + struct MEdge *medges, const int numEdges, + struct MLoop *mloops, const int numLoops, + struct MPoly *mpolys, const float (*polynors)[3], const int numPolys, + const float split_angle); + /** * References a contiguous loop-fan with normal offset vars. */ diff --git a/source/blender/blenkernel/intern/mesh_evaluate.c b/source/blender/blenkernel/intern/mesh_evaluate.c index 528a1c0f552..a4cc6913fd9 100644 --- a/source/blender/blenkernel/intern/mesh_evaluate.c +++ b/source/blender/blenkernel/intern/mesh_evaluate.c @@ -680,10 +680,11 @@ typedef struct LoopSplitTaskDataCommon { const MEdge *medges; const MLoop *mloops; const MPoly *mpolys; - const int (*edge_to_loops)[2]; - const int *loop_to_poly; + int (*edge_to_loops)[2]; + int *loop_to_poly; const float (*polynors)[3]; + int numEdges; int numLoops; int numPolys; } LoopSplitTaskDataCommon; @@ -693,6 +694,154 @@ typedef struct LoopSplitTaskDataCommon { /* See comment about edge_to_loops below. */ #define IS_EDGE_SHARP(_e2l) (ELEM((_e2l)[1], INDEX_UNSET, INDEX_INVALID)) +static void mesh_edges_sharp_tag( + LoopSplitTaskDataCommon *data, + const bool check_angle, const float split_angle, const bool do_sharp_edges_tag) +{ + MVert *mverts = data->mverts; + MEdge *medges = data->medges; + MLoop *mloops = data->mloops; + MPoly *mpolys = data->mpolys; + + const int numEdges = data->numEdges; + const int numPolys = data->numPolys; + + float (*loopnors)[3] = data->loopnors; /* Note: loopnors may be NULL here. */ + const float (*polynors)[3] = data->polynors; + + int (*edge_to_loops)[2] = data->edge_to_loops; + int *loop_to_poly = data->loop_to_poly; + + BLI_bitmap *sharp_edges = do_sharp_edges_tag ? BLI_BITMAP_NEW(numEdges, __func__) : NULL; + + MPoly *mp; + int mp_index; + + const float split_angle_cos = check_angle ? cosf(split_angle) : -1.0f; + + for (mp = mpolys, mp_index = 0; mp_index < numPolys; mp++, mp_index++) { + MLoop *ml_curr; + int *e2l; + int ml_curr_index = mp->loopstart; + const int ml_last_index = (ml_curr_index + mp->totloop) - 1; + + ml_curr = &mloops[ml_curr_index]; + + for (; ml_curr_index <= ml_last_index; ml_curr++, ml_curr_index++) { + MEdge *me = &medges[ml_curr->e]; + + e2l = edge_to_loops[ml_curr->e]; + + loop_to_poly[ml_curr_index] = mp_index; + + /* Pre-populate all loop normals as if their verts were all-smooth, this way we don't have to compute + * those later! + */ + if (loopnors) { + normal_short_to_float_v3(loopnors[ml_curr_index], mverts[ml_curr->v].no); + } + + /* Check whether current edge might be smooth or sharp */ + if ((e2l[0] | e2l[1]) == 0) { + /* 'Empty' edge until now, set e2l[0] (and e2l[1] to INDEX_UNSET to tag it as unset). */ + e2l[0] = ml_curr_index; + /* We have to check this here too, else we might miss some flat faces!!! */ + e2l[1] = (mp->flag & ME_SMOOTH) ? INDEX_UNSET : INDEX_INVALID; + } + else if (e2l[1] == INDEX_UNSET) { + const bool is_angle_sharp = (check_angle && + dot_v3v3(polynors[loop_to_poly[e2l[0]]], polynors[mp_index]) < split_angle_cos); + + /* Second loop using this edge, time to test its sharpness. + * An edge is sharp if it is tagged as such, or its face is not smooth, + * or both poly have opposed (flipped) normals, i.e. both loops on the same edge share the same vertex, + * or angle between both its polys' normals is above split_angle value. + */ + if (!(mp->flag & ME_SMOOTH) || (me->flag & ME_SHARP) || + ml_curr->v == mloops[e2l[0]].v || + is_angle_sharp) + { + /* Note: we are sure that loop != 0 here ;) */ + e2l[1] = INDEX_INVALID; + + /* We want to avoid tagging edges as sharp when it is already defined as such by + * other causes than angle threshold... */ + if (do_sharp_edges_tag && is_angle_sharp) { + BLI_BITMAP_SET(sharp_edges, ml_curr->e, true); + } + } + else { + e2l[1] = ml_curr_index; + } + } + else if (!IS_EDGE_SHARP(e2l)) { + /* More than two loops using this edge, tag as sharp if not yet done. */ + e2l[1] = INDEX_INVALID; + + /* We want to avoid tagging edges as sharp when it is already defined as such by + * other causes than angle threshold... */ + if (do_sharp_edges_tag) { + BLI_BITMAP_SET(sharp_edges, ml_curr->e, false); + } + } + /* Else, edge is already 'disqualified' (i.e. sharp)! */ + } + } + + /* If requested, do actual tagging of edges as sharp in another loop. */ + if (do_sharp_edges_tag) { + MEdge *me; + int me_index; + for (me = medges, me_index = 0; me_index < numEdges; me++, me_index++) { + if (BLI_BITMAP_TEST(sharp_edges, me_index)) { + me->flag |= ME_SHARP; + } + } + + MEM_freeN(sharp_edges); + } +} + +/** Define sharp edges as needed to mimic 'autosmooth' from angle threshold. + * + * Used when defining an empty custom loop normals data layer, to keep same shading as with autosmooth! + */ +void BKE_edges_sharp_from_angle_set( + const struct MVert *mverts, const int UNUSED(numVerts), + struct MEdge *medges, const int numEdges, + struct MLoop *mloops, const int numLoops, + struct MPoly *mpolys, const float (*polynors)[3], const int numPolys, + const float split_angle) +{ + if (split_angle >= (float)M_PI) { + /* Nothing to do! */ + return; + } + + /* Mapping edge -> loops. See BKE_mesh_normals_loop_split() for details. */ + int (*edge_to_loops)[2] = MEM_calloc_arrayN((size_t)numEdges, sizeof(*edge_to_loops), __func__); + + /* Simple mapping from a loop to its polygon index. */ + int *loop_to_poly = MEM_malloc_arrayN((size_t)numLoops, sizeof(*loop_to_poly), __func__); + + LoopSplitTaskDataCommon common_data = { + .mverts = mverts, + .medges = medges, + .mloops = mloops, + .mpolys = mpolys, + .edge_to_loops = edge_to_loops, + .loop_to_poly = loop_to_poly, + .polynors = polynors, + .numEdges = numEdges, + .numPolys = numPolys, + }; + + mesh_edges_sharp_tag(&common_data, true, split_angle, true); + + MEM_freeN(edge_to_loops); + MEM_freeN(loop_to_poly); +} + static void loop_manifold_fan_around_vert_next( const MLoop *mloops, const MPoly *mpolys, const int *loop_to_poly, const int *e2lfan_curr, const uint mv_pivot_index, @@ -1313,12 +1462,8 @@ void BKE_mesh_normals_loop_split( /* Simple mapping from a loop to its polygon index. */ int *loop_to_poly = r_loop_to_poly ? r_loop_to_poly : MEM_malloc_arrayN((size_t)numLoops, sizeof(*loop_to_poly), __func__); - MPoly *mp; - int mp_index; - /* When using custom loop normals, disable the angle feature! */ const bool check_angle = (split_angle < (float)M_PI) && (clnors_data == NULL); - const float split_angle_cos = check_angle ? cosf(split_angle) : -1.0f; MLoopNorSpaceArray _lnors_spacearr = {NULL}; @@ -1334,57 +1479,6 @@ void BKE_mesh_normals_loop_split( BKE_lnor_spacearr_init(r_lnors_spacearr, numLoops); } - /* This first loop check which edges are actually smooth, and compute edge vectors. */ - for (mp = mpolys, mp_index = 0; mp_index < numPolys; mp++, mp_index++) { - MLoop *ml_curr; - int *e2l; - int ml_curr_index = mp->loopstart; - const int ml_last_index = (ml_curr_index + mp->totloop) - 1; - - ml_curr = &mloops[ml_curr_index]; - - for (; ml_curr_index <= ml_last_index; ml_curr++, ml_curr_index++) { - e2l = edge_to_loops[ml_curr->e]; - - loop_to_poly[ml_curr_index] = mp_index; - - /* Pre-populate all loop normals as if their verts were all-smooth, this way we don't have to compute - * those later! - */ - normal_short_to_float_v3(r_loopnors[ml_curr_index], mverts[ml_curr->v].no); - - /* Check whether current edge might be smooth or sharp */ - if ((e2l[0] | e2l[1]) == 0) { - /* 'Empty' edge until now, set e2l[0] (and e2l[1] to INDEX_UNSET to tag it as unset). */ - e2l[0] = ml_curr_index; - /* We have to check this here too, else we might miss some flat faces!!! */ - e2l[1] = (mp->flag & ME_SMOOTH) ? INDEX_UNSET : INDEX_INVALID; - } - else if (e2l[1] == INDEX_UNSET) { - /* Second loop using this edge, time to test its sharpness. - * An edge is sharp if it is tagged as such, or its face is not smooth, - * or both poly have opposed (flipped) normals, i.e. both loops on the same edge share the same vertex, - * or angle between both its polys' normals is above split_angle value. - */ - if (!(mp->flag & ME_SMOOTH) || (medges[ml_curr->e].flag & ME_SHARP) || - ml_curr->v == mloops[e2l[0]].v || - (check_angle && dot_v3v3(polynors[loop_to_poly[e2l[0]]], polynors[mp_index]) < split_angle_cos)) - { - /* Note: we are sure that loop != 0 here ;) */ - e2l[1] = INDEX_INVALID; - } - else { - e2l[1] = ml_curr_index; - } - } - else if (!IS_EDGE_SHARP(e2l)) { - /* More than two loops using this edge, tag as sharp if not yet done. */ - e2l[1] = INDEX_INVALID; - } - /* Else, edge is already 'disqualified' (i.e. sharp)! */ - } - } - /* Init data common to all tasks. */ LoopSplitTaskDataCommon common_data = { .lnors_spacearr = r_lnors_spacearr, @@ -1394,13 +1488,17 @@ void BKE_mesh_normals_loop_split( .medges = medges, .mloops = mloops, .mpolys = mpolys, - .edge_to_loops = (const int(*)[2])edge_to_loops, + .edge_to_loops = edge_to_loops, .loop_to_poly = loop_to_poly, .polynors = polynors, + .numEdges = numEdges, .numLoops = numLoops, .numPolys = numPolys, }; + /* This first loop check which edges are actually smooth, and compute edge vectors. */ + mesh_edges_sharp_tag(&common_data, check_angle, split_angle, false); + if (numLoops < LOOP_SPLIT_TASK_BLOCK_SIZE * 8) { /* Not enough loops to be worth the whole threading overhead... */ loop_split_generator(NULL, &common_data); diff --git a/source/blender/bmesh/intern/bmesh_mesh.c b/source/blender/bmesh/intern/bmesh_mesh.c index 2eb9c1c6597..8d6e7ae5b29 100644 --- a/source/blender/bmesh/intern/bmesh_mesh.c +++ b/source/blender/bmesh/intern/bmesh_mesh.c @@ -524,8 +524,9 @@ void BM_verts_calc_normal_vcos(BMesh *bm, const float (*fnos)[3], const float (* * Helpers for #BM_mesh_loop_normals_update and #BM_loops_calc_normals_vnos */ static void bm_mesh_edges_sharp_tag( - BMesh *bm, const float (*vnos)[3], const float (*fnos)[3], const float split_angle, - float (*r_lnos)[3]) + BMesh *bm, + const float (*vnos)[3], const float (*fnos)[3], float (*r_lnos)[3], + const float split_angle, const bool do_sharp_edges_tag) { BMIter eiter; BMEdge *e; @@ -567,20 +568,28 @@ static void bm_mesh_edges_sharp_tag( * and both its faces have compatible (non-flipped) normals, * i.e. both loops on the same edge do not share the same vertex. */ - if (is_angle_smooth && - BM_elem_flag_test(e, BM_ELEM_SMOOTH) && + if (BM_elem_flag_test(e, BM_ELEM_SMOOTH) && BM_elem_flag_test(l_a->f, BM_ELEM_SMOOTH) && BM_elem_flag_test(l_b->f, BM_ELEM_SMOOTH) && l_a->v != l_b->v) { - const float *no; - BM_elem_flag_enable(e, BM_ELEM_TAG); - - /* linked vertices might be fully smooth, copy their normals to loop ones. */ - no = vnos ? vnos[BM_elem_index_get(l_a->v)] : l_a->v->no; - copy_v3_v3(r_lnos[BM_elem_index_get(l_a)], no); - no = vnos ? vnos[BM_elem_index_get(l_b->v)] : l_b->v->no; - copy_v3_v3(r_lnos[BM_elem_index_get(l_b)], no); + if (is_angle_smooth) { + const float *no; + BM_elem_flag_enable(e, BM_ELEM_TAG); + + /* linked vertices might be fully smooth, copy their normals to loop ones. */ + if (r_lnos) { + no = vnos ? vnos[BM_elem_index_get(l_a->v)] : l_a->v->no; + copy_v3_v3(r_lnos[BM_elem_index_get(l_a)], no); + no = vnos ? vnos[BM_elem_index_get(l_b->v)] : l_b->v->no; + copy_v3_v3(r_lnos[BM_elem_index_get(l_b)], no); + } + } + else if (do_sharp_edges_tag) { + /* Note that we do not care about the other sharp-edge cases (sharp poly, non-manifold edge, etc.), + * only tag edge as sharp when it is due to angle threashold. */ + BM_elem_flag_disable(e, BM_ELEM_SMOOTH); + } } } } @@ -1005,7 +1014,7 @@ void BM_loops_calc_normal_vcos( if (use_split_normals) { /* Tag smooth edges and set lnos from vnos when they might be completely smooth... * When using custom loop normals, disable the angle feature! */ - bm_mesh_edges_sharp_tag(bm, vnos, fnos, has_clnors ? (float)M_PI : split_angle, r_lnos); + bm_mesh_edges_sharp_tag(bm, vnos, fnos, r_lnos, has_clnors ? (float)M_PI : split_angle, false); /* Finish computing lnos by accumulating face normals in each fan of faces defined by sharp edges. */ bm_mesh_loops_calc_normals(bm, vcos, fnos, r_lnos, r_lnors_spacearr, clnors_data, cd_loop_clnors_offset); @@ -1016,6 +1025,20 @@ void BM_loops_calc_normal_vcos( } } +/** Define sharp edges as needed to mimic 'autosmooth' from angle threshold. + * + * Used when defining an empty custom loop normals data layer, to keep same shading as with autosmooth! + */ +void BM_edges_sharp_from_angle_set(BMesh *bm, const float split_angle) +{ + if (split_angle >= (float)M_PI) { + /* Nothing to do! */ + return; + } + + bm_mesh_edges_sharp_tag(bm, NULL, NULL, NULL, split_angle, true); +} + static void UNUSED_FUNCTION(bm_mdisps_space_set)(Object *ob, BMesh *bm, int from, int to) { /* switch multires data out of tangent space */ diff --git a/source/blender/bmesh/intern/bmesh_mesh.h b/source/blender/bmesh/intern/bmesh_mesh.h index 01f11f6f942..8326e82af00 100644 --- a/source/blender/bmesh/intern/bmesh_mesh.h +++ b/source/blender/bmesh/intern/bmesh_mesh.h @@ -52,6 +52,8 @@ void BM_loops_calc_normal_vcos( const bool use_split_normals, const float split_angle, float (*r_lnos)[3], struct MLoopNorSpaceArray *r_lnors_spacearr, short (*clnors_data)[2], const int cd_loop_clnors_offset); +void BM_edges_sharp_from_angle_set(BMesh *bm, const float split_angle); + void bmesh_edit_begin(BMesh *bm, const BMOpTypeFlag type_flag); void bmesh_edit_end(BMesh *bm, const BMOpTypeFlag type_flag); diff --git a/source/blender/editors/mesh/mesh_data.c b/source/blender/editors/mesh/mesh_data.c index bd7aaec075b..cfeda36214c 100644 --- a/source/blender/editors/mesh/mesh_data.c +++ b/source/blender/editors/mesh/mesh_data.c @@ -903,9 +903,38 @@ static int mesh_customdata_custom_splitnormals_add_exec(bContext *C, wmOperator CustomData *data = GET_CD_DATA(me, ldata); if (me->edit_btmesh) { + /* Tag edges as sharp according to smooth threshold if needed, to preserve autosmooth shading. */ + if (me->flag & ME_AUTOSMOOTH) { + BM_edges_sharp_from_angle_set(me->edit_btmesh->bm, me->smoothresh); + + me->drawflag |= ME_DRAWSHARP; + } + BM_data_layer_add(me->edit_btmesh->bm, data, CD_CUSTOMLOOPNORMAL); } else { + /* Tag edges as sharp according to smooth threshold if needed, to preserve autosmooth shading. */ + if (me->flag & ME_AUTOSMOOTH) { + float (*polynors)[3] = MEM_mallocN(sizeof(*polynors) * (size_t)me->totpoly, __func__); + + BKE_mesh_calc_normals_poly( + me->mvert, NULL, me->totvert, + me->mloop, me->mpoly, + me->totloop, me->totpoly, + polynors, true); + + BKE_edges_sharp_from_angle_set( + me->mvert, me->totvert, + me->medge, me->totedge, + me->mloop, me->totloop, + me->mpoly, polynors, me->totpoly, + me->smoothresh); + + MEM_freeN(polynors); + + me->drawflag |= ME_DRAWSHARP; + } + CustomData_add_layer(data, CD_CUSTOMLOOPNORMAL, CD_DEFAULT, NULL, me->totloop); } |