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tornavis/source/blender/bmesh/operators/bmo_extrude.cc

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/* SPDX-FileCopyrightText: 2023 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bmesh
*
* Extrude faces and solidify.
*/
#include "MEM_guardedalloc.h"
#include "DNA_meshdata_types.h"
#include "BLI_buffer.h"
#include "BLI_math_geom.h"
#include "BLI_math_vector.h"
#include "BKE_customdata.hh"
#include "bmesh.hh"
#include "intern/bmesh_operators_private.hh" /* own include */
#define USE_EDGE_REGION_FLAGS
enum {
EXT_INPUT = 1,
EXT_KEEP = 2,
EXT_DEL = 4,
EXT_TAG = 8,
};
#define VERT_MARK 1
#define EDGE_MARK 1
#define FACE_MARK 1
#define VERT_NONMAN 2
#define EDGE_NONMAN 2
void bmo_extrude_discrete_faces_exec(BMesh *bm, BMOperator *op)
{
const bool use_select_history = BMO_slot_bool_get(op->slots_in, "use_select_history");
GHash *select_history_map = nullptr;
BMOIter siter;
BMFace *f_org;
if (use_select_history) {
select_history_map = BM_select_history_map_create(bm);
}
BMO_ITER (f_org, &siter, op->slots_in, "faces", BM_FACE) {
BMFace *f_new;
BMLoop *l_org, *l_org_first;
BMLoop *l_new;
BMO_face_flag_enable(bm, f_org, EXT_DEL);
f_new = BM_face_copy(bm, f_org, true, true);
BMO_face_flag_enable(bm, f_new, EXT_KEEP);
if (select_history_map) {
BMEditSelection *ese;
ese = static_cast<BMEditSelection *>(BLI_ghash_lookup(select_history_map, f_org));
if (ese) {
ese->ele = (BMElem *)f_new;
}
}
l_org = l_org_first = BM_FACE_FIRST_LOOP(f_org);
l_new = BM_FACE_FIRST_LOOP(f_new);
do {
BMFace *f_side;
BMLoop *l_side_iter;
BM_elem_attrs_copy(bm, l_org, l_new);
f_side = BM_face_create_quad_tri(
bm, l_org->next->v, l_new->next->v, l_new->v, l_org->v, f_org, BM_CREATE_NOP);
l_side_iter = BM_FACE_FIRST_LOOP(f_side);
BM_elem_attrs_copy(bm, l_org->next, l_side_iter);
l_side_iter = l_side_iter->next;
BM_elem_attrs_copy(bm, l_org->next, l_side_iter);
l_side_iter = l_side_iter->next;
BM_elem_attrs_copy(bm, l_org, l_side_iter);
l_side_iter = l_side_iter->next;
BM_elem_attrs_copy(bm, l_org, l_side_iter);
if (select_history_map) {
BMEditSelection *ese;
ese = static_cast<BMEditSelection *>(BLI_ghash_lookup(select_history_map, l_org->v));
if (ese) {
ese->ele = (BMElem *)l_new->v;
}
ese = static_cast<BMEditSelection *>(BLI_ghash_lookup(select_history_map, l_org->e));
if (ese) {
ese->ele = (BMElem *)l_new->e;
}
}
} while (((void)(l_new = l_new->next), (l_org = l_org->next)) != l_org_first);
}
if (select_history_map) {
BLI_ghash_free(select_history_map, nullptr, nullptr);
}
BMO_op_callf(bm, op->flag, "delete geom=%ff context=%i", EXT_DEL, DEL_ONLYFACES);
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "faces.out", BM_FACE, EXT_KEEP);
}
/**
* \brief Copy the loop pair from an adjacent face to both sides of this quad.
*
* The face is assumed to be a quad, created by extruding.
* This function won't crash if its not but won't work right either.
* \a e_b is the new edge.
*
* \note The edge this face comes from needs to be from the first and second verts to the face.
* The caller must ensure this else we will copy from the wrong source.
*/
static void bm_extrude_copy_face_loop_attributes(BMesh *bm, BMFace *f)
{
/* edge we are extruded from */
BMLoop *l_first_0 = BM_FACE_FIRST_LOOP(f);
BMLoop *l_first_1 = l_first_0->next;
BMLoop *l_first_2 = l_first_1->next;
BMLoop *l_first_3 = l_first_2->next;
BMLoop *l_other_0;
BMLoop *l_other_1;
if (UNLIKELY(l_first_0 == l_first_0->radial_next)) {
return;
}
l_other_0 = BM_edge_other_loop(l_first_0->e, l_first_0);
l_other_1 = BM_edge_other_loop(l_first_0->e, l_first_1);
/* copy data */
BM_elem_attrs_copy(bm, l_other_0->f, f);
BM_elem_flag_disable(f, BM_ELEM_HIDDEN); /* possibly we copy from a hidden face */
BM_elem_attrs_copy(bm, l_other_0, l_first_0);
BM_elem_attrs_copy(bm, l_other_0, l_first_3);
BM_elem_attrs_copy(bm, l_other_1, l_first_1);
BM_elem_attrs_copy(bm, l_other_1, l_first_2);
}
/* Disable the skin root flag on the input vert, assumes that the vert
* data includes an CD_MVERT_SKIN layer */
static void bm_extrude_disable_skin_root(BMesh *bm, BMVert *v)
{
MVertSkin *vs;
vs = static_cast<MVertSkin *>(CustomData_bmesh_get(&bm->vdata, v->head.data, CD_MVERT_SKIN));
vs->flag &= ~MVERT_SKIN_ROOT;
}
void bmo_extrude_edge_only_exec(BMesh *bm, BMOperator *op)
{
BMOIter siter;
BMOperator dupeop;
BMFace *f;
BMEdge *e, *e_new;
const bool use_normal_flip = BMO_slot_bool_get(op->slots_in, "use_normal_flip");
BMO_ITER (e, &siter, op->slots_in, "edges", BM_EDGE) {
BMO_edge_flag_enable(bm, e, EXT_INPUT);
BMO_vert_flag_enable(bm, e->v1, EXT_INPUT);
BMO_vert_flag_enable(bm, e->v2, EXT_INPUT);
}
BMO_op_initf(bm,
&dupeop,
op->flag,
"duplicate geom=%fve use_select_history=%b",
EXT_INPUT,
BMO_slot_bool_get(op->slots_in, "use_select_history"));
BMO_op_exec(bm, &dupeop);
/* disable root flag on all new skin nodes */
if (CustomData_has_layer(&bm->vdata, CD_MVERT_SKIN)) {
BMVert *v;
BMO_ITER (v, &siter, dupeop.slots_out, "geom.out", BM_VERT) {
bm_extrude_disable_skin_root(bm, v);
}
}
for (e = static_cast<BMEdge *>(BMO_iter_new(&siter, dupeop.slots_out, "boundary_map.out", 0)); e;
e = static_cast<BMEdge *>(BMO_iter_step(&siter)))
{
BMVert *f_verts[4];
e_new = static_cast<BMEdge *>(BMO_iter_map_value_ptr(&siter));
const bool edge_normal_flip = !(e->l && e->v1 != e->l->v);
if (edge_normal_flip == use_normal_flip) {
f_verts[0] = e->v1;
f_verts[1] = e->v2;
f_verts[2] = e_new->v2;
f_verts[3] = e_new->v1;
}
else {
f_verts[0] = e->v2;
f_verts[1] = e->v1;
f_verts[2] = e_new->v1;
f_verts[3] = e_new->v2;
}
/* not sure what to do about example face, pass nullptr for now */
f = BM_face_create_verts(bm, f_verts, 4, nullptr, BM_CREATE_NOP, true);
bm_extrude_copy_face_loop_attributes(bm, f);
if (BMO_edge_flag_test(bm, e, EXT_INPUT)) {
e = e_new;
}
BMO_face_flag_enable(bm, f, EXT_KEEP);
BMO_edge_flag_enable(bm, e, EXT_KEEP);
BMO_vert_flag_enable(bm, e->v1, EXT_KEEP);
BMO_vert_flag_enable(bm, e->v2, EXT_KEEP);
}
BMO_op_finish(bm, &dupeop);
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "geom.out", BM_ALL_NOLOOP, EXT_KEEP);
}
void bmo_extrude_vert_indiv_exec(BMesh *bm, BMOperator *op)
{
const bool use_select_history = BMO_slot_bool_get(op->slots_in, "use_select_history");
BMOIter siter;
BMVert *v, *dupev;
BMEdge *e;
const bool has_vskin = CustomData_has_layer(&bm->vdata, CD_MVERT_SKIN);
GHash *select_history_map = nullptr;
if (use_select_history) {
select_history_map = BM_select_history_map_create(bm);
}
for (v = static_cast<BMVert *>(BMO_iter_new(&siter, op->slots_in, "verts", BM_VERT)); v;
v = static_cast<BMVert *>(BMO_iter_step(&siter)))
{
dupev = BM_vert_create(bm, v->co, v, BM_CREATE_NOP);
BMO_vert_flag_enable(bm, dupev, EXT_KEEP);
if (has_vskin) {
bm_extrude_disable_skin_root(bm, v);
}
if (select_history_map) {
BMEditSelection *ese;
ese = static_cast<BMEditSelection *>(BLI_ghash_lookup(select_history_map, v));
if (ese) {
ese->ele = (BMElem *)dupev;
}
}
/* not essential, but ensures face normals from extruded edges are contiguous */
if (BM_vert_is_wire_endpoint(v)) {
if (v->e->v1 == v) {
std::swap(v, dupev);
}
}
e = BM_edge_create(bm, v, dupev, nullptr, BM_CREATE_NOP);
BMO_edge_flag_enable(bm, e, EXT_KEEP);
}
if (select_history_map) {
BLI_ghash_free(select_history_map, nullptr, nullptr);
}
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "verts.out", BM_VERT, EXT_KEEP);
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "edges.out", BM_EDGE, EXT_KEEP);
}
#ifdef USE_EDGE_REGION_FLAGS
/**
* When create an edge for an extruded face region
* check surrounding edge flags before creating a new edge.
*/
static bool bm_extrude_region_edge_flag(const BMVert *v, char r_e_hflag[2])
{
BMEdge *e_iter;
const char hflag_enable = BM_ELEM_SEAM;
const char hflag_disable = BM_ELEM_SMOOTH;
bool ok = false;
r_e_hflag[0] = 0x0;
r_e_hflag[1] = 0xff;
/* clear flags on both disks */
e_iter = v->e;
do {
if (e_iter->l && !BM_edge_is_boundary(e_iter)) {
r_e_hflag[0] |= e_iter->head.hflag;
r_e_hflag[1] &= e_iter->head.hflag;
ok = true;
}
} while ((e_iter = BM_DISK_EDGE_NEXT(e_iter, v)) != v->e);
if (ok) {
r_e_hflag[0] &= hflag_enable;
r_e_hflag[1] = hflag_disable & ~r_e_hflag[1];
}
return ok;
}
#endif /* USE_EDGE_REGION_FLAGS */
void bmo_extrude_face_region_exec(BMesh *bm, BMOperator *op)
{
BMOperator dupeop, delop;
BMOIter siter;
BMIter iter, fiter, viter;
BMEdge *e, *e_new;
BMVert *v;
BMFace *f;
bool found, delorig = false;
BMOpSlot *slot_facemap_out;
BMOpSlot *slot_edges_exclude;
const bool use_normal_flip = BMO_slot_bool_get(op->slots_in, "use_normal_flip");
const bool use_normal_from_adjacent = BMO_slot_bool_get(op->slots_in,
"use_normal_from_adjacent");
const bool use_dissolve_ortho_edges = BMO_slot_bool_get(op->slots_in,
"use_dissolve_ortho_edges");
/* initialize our sub-operators */
BMO_op_initf(bm,
&dupeop,
op->flag,
"duplicate use_select_history=%b",
BMO_slot_bool_get(op->slots_in, "use_select_history"));
BMO_slot_buffer_flag_enable(bm, op->slots_in, "geom", BM_EDGE | BM_FACE, EXT_INPUT);
/* if one flagged face is bordered by an un-flagged face, then we delete
* original geometry unless caller explicitly asked to keep it. */
if (!BMO_slot_bool_get(op->slots_in, "use_keep_orig")) {
BM_ITER_MESH (e, &iter, bm, BM_EDGES_OF_MESH) {
int edge_face_tot;
if (!BMO_edge_flag_test(bm, e, EXT_INPUT)) {
continue;
}
found = false; /* found a face that isn't input? */
edge_face_tot = 0; /* edge/face count */
BM_ITER_ELEM (f, &fiter, e, BM_FACES_OF_EDGE) {
if (!BMO_face_flag_test(bm, f, EXT_INPUT)) {
found = true;
delorig = true;
break;
}
edge_face_tot++;
}
if ((edge_face_tot > 1) && (found == false)) {
/* edge has a face user, that face isn't extrude input */
BMO_edge_flag_enable(bm, e, EXT_DEL);
}
}
}
/* calculate verts to delete */
BM_ITER_MESH (v, &iter, bm, BM_VERTS_OF_MESH) {
if (v->e) { /* only deal with verts attached to geometry #33651. */
found = false;
BM_ITER_ELEM (e, &viter, v, BM_EDGES_OF_VERT) {
if (!BMO_edge_flag_test(bm, e, EXT_INPUT) || !BMO_edge_flag_test(bm, e, EXT_DEL)) {
found = true;
break;
}
}
/* avoid an extra loop */
if (found == false) {
BM_ITER_ELEM (f, &viter, v, BM_FACES_OF_VERT) {
if (!BMO_face_flag_test(bm, f, EXT_INPUT)) {
found = true;
break;
}
}
}
if (found == false) {
BMO_vert_flag_enable(bm, v, EXT_DEL);
}
}
}
BM_ITER_MESH (f, &iter, bm, BM_FACES_OF_MESH) {
if (BMO_face_flag_test(bm, f, EXT_INPUT)) {
BMO_face_flag_enable(bm, f, EXT_DEL);
}
}
if (delorig == true) {
BMO_op_initf(bm, &delop, op->flag, "delete geom=%fvef context=%i", EXT_DEL, DEL_ONLYTAGGED);
}
BMO_slot_copy(op, slots_in, "geom", &dupeop, slots_in, "geom");
BMO_op_exec(bm, &dupeop);
/* disable root flag on all new skin nodes */
if (CustomData_has_layer(&bm->vdata, CD_MVERT_SKIN)) {
BMO_ITER (v, &siter, dupeop.slots_out, "geom.out", BM_VERT) {
bm_extrude_disable_skin_root(bm, v);
}
}
slot_facemap_out = BMO_slot_get(dupeop.slots_out, "face_map.out");
if (bm->act_face && BMO_face_flag_test(bm, bm->act_face, EXT_INPUT)) {
bm->act_face = static_cast<BMFace *>(BMO_slot_map_elem_get(slot_facemap_out, bm->act_face));
}
if (delorig) {
BMO_op_exec(bm, &delop);
}
/* if not delorig, reverse loops of original face */
if (!delorig) {
BM_ITER_MESH (f, &iter, bm, BM_FACES_OF_MESH) {
if (BMO_face_flag_test(bm, f, EXT_INPUT)) {
BM_face_normal_flip(bm, f);
}
}
}
BMVert **dissolve_verts = nullptr;
int dissolve_verts_len = 0;
float average_normal[3];
if (use_dissolve_ortho_edges) {
/* Calc average normal. */
zero_v3(average_normal);
BMO_ITER (f, &siter, dupeop.slots_out, "geom.out", BM_FACE) {
add_v3_v3(average_normal, f->no);
}
if (normalize_v3(average_normal) == 0.0f) {
average_normal[2] = 1.0f;
}
/* Allocate array to store possible vertices that will be dissolved. */
int boundary_edges_len = BMO_slot_map_len(dupeop.slots_out, "boundary_map.out");
/* We do not know the real number of boundary vertices. */
int boundary_verts_len_maybe = 2 * boundary_edges_len;
dissolve_verts = static_cast<BMVert **>(
MEM_mallocN(boundary_verts_len_maybe * sizeof(*dissolve_verts), __func__));
}
BMO_slot_copy(&dupeop, slots_out, "geom.out", op, slots_out, "geom.out");
slot_edges_exclude = BMO_slot_get(op->slots_in, "edges_exclude");
for (e = static_cast<BMEdge *>(BMO_iter_new(&siter, dupeop.slots_out, "boundary_map.out", 0)); e;
e = static_cast<BMEdge *>(BMO_iter_step(&siter)))
{
BMVert *f_verts[4];
#ifdef USE_EDGE_REGION_FLAGS
BMEdge *f_edges[4];
#endif
/* this should always be wire, so this is mainly a speedup to avoid map lookup */
if (BM_edge_is_wire(e) && BMO_slot_map_contains(slot_edges_exclude, e)) {
BMVert *v1 = e->v1, *v2 = e->v2;
/* The original edge was excluded,
* this would result in a standalone wire edge - see #30399. */
BM_edge_kill(bm, e);
/* kill standalone vertices from this edge - see #32341. */
if (!v1->e) {
BM_vert_kill(bm, v1);
}
if (!v2->e) {
BM_vert_kill(bm, v2);
}
continue;
}
/* skip creating face for excluded edges see #35503. */
if (BMO_slot_map_contains(slot_edges_exclude, e)) {
/* simply skip creating the face */
continue;
}
e_new = static_cast<BMEdge *>(BMO_iter_map_value_ptr(&siter));
if (!e_new) {
continue;
}
BMFace *join_face = nullptr;
if (use_dissolve_ortho_edges) {
if (BM_edge_is_boundary(e)) {
join_face = e->l->f;
if (fabs(dot_v3v3(average_normal, join_face->no)) > 0.0001f) {
join_face = nullptr;
}
}
}
bool edge_normal_flip;
if (use_normal_from_adjacent == false) {
/* Orient loop to give same normal as a loop of 'e_new'
* if it exists (will be one of the faces from the region),
* else same normal as a loop of e, if it exists. */
edge_normal_flip = !(e_new->l ? (e_new->l->v == e_new->v1) : (!e->l || !(e->l->v == e->v1)));
}
else {
/* Special case, needed for repetitive extrusions
* that use the normals from the previously created faces. */
edge_normal_flip = !(e->l && e->v1 != e->l->v);
}
if (edge_normal_flip == use_normal_flip) {
f_verts[0] = e->v1;
f_verts[1] = e->v2;
f_verts[2] = e_new->v2;
f_verts[3] = e_new->v1;
}
else {
f_verts[0] = e->v2;
f_verts[1] = e->v1;
f_verts[2] = e_new->v1;
f_verts[3] = e_new->v2;
}
#ifdef USE_EDGE_REGION_FLAGS
/* handle new edges */
f_edges[0] = e;
f_edges[2] = e_new;
f_edges[1] = BM_edge_exists(f_verts[1], f_verts[2]);
if (f_edges[1] == nullptr) {
char e_hflag[2];
bool e_hflag_ok = bm_extrude_region_edge_flag(f_verts[2], e_hflag);
f_edges[1] = BM_edge_create(bm, f_verts[1], f_verts[2], nullptr, BM_CREATE_NOP);
if (e_hflag_ok) {
BM_elem_flag_enable(f_edges[1], e_hflag[0]);
BM_elem_flag_disable(f_edges[1], e_hflag[1]);
}
}
f_edges[3] = BM_edge_exists(f_verts[3], f_verts[0]);
if (f_edges[3] == nullptr) {
char e_hflag[2];
bool e_hflag_ok = bm_extrude_region_edge_flag(f_verts[3], e_hflag);
f_edges[3] = BM_edge_create(bm, f_verts[3], f_verts[0], nullptr, BM_CREATE_NOP);
if (e_hflag_ok) {
BM_elem_flag_enable(f_edges[3], e_hflag[0]);
BM_elem_flag_disable(f_edges[3], e_hflag[1]);
}
}
f = BM_face_create(bm, f_verts, f_edges, 4, nullptr, BM_CREATE_NOP);
#else
f = BM_face_create_verts(bm, f_verts, 4, nullptr, BM_CREATE_NOP, true);
#endif
bm_extrude_copy_face_loop_attributes(bm, f);
if (join_face) {
BMVert *v1 = e->v1;
BMVert *v2 = e->v2;
if (!BMO_elem_flag_test(bm, v1, EXT_TAG)) {
BMO_elem_flag_enable(bm, v1, EXT_TAG);
dissolve_verts[dissolve_verts_len++] = v1;
}
if (!BMO_elem_flag_test(bm, v2, EXT_TAG)) {
BMO_elem_flag_enable(bm, v2, EXT_TAG);
dissolve_verts[dissolve_verts_len++] = v2;
}
/* Tag the edges that can collapse. */
BMO_elem_flag_enable(bm, f_edges[0], EXT_TAG);
BMO_elem_flag_enable(bm, f_edges[1], EXT_TAG);
bmesh_kernel_join_face_kill_edge(bm, join_face, f, e);
}
}
/* link isolated vert */
for (v = static_cast<BMVert *>(BMO_iter_new(&siter, dupeop.slots_out, "isovert_map.out", 0)); v;
v = static_cast<BMVert *>(BMO_iter_step(&siter)))
{
BMVert *v2 = static_cast<BMVert *>(BMO_iter_map_value_ptr(&siter));
/* not essential, but ensures face normals from extruded edges are contiguous */
if (BM_vert_is_wire_endpoint(v)) {
if (v->e->v1 == v) {
std::swap(v, v2);
}
}
BM_edge_create(bm, v, v2, nullptr, BM_CREATE_NO_DOUBLE);
}
if (dissolve_verts) {
BMVert **v_iter = &dissolve_verts[0];
for (int i = dissolve_verts_len; i--; v_iter++) {
v = *v_iter;
e = v->e;
BMEdge *e_other = BM_DISK_EDGE_NEXT(e, v);
if ((e_other == e) || (BM_DISK_EDGE_NEXT(e_other, v) == e)) {
/* Loose edge or BMVert is edge pair. */
BM_edge_collapse(bm, BMO_elem_flag_test(bm, e, EXT_TAG) ? e : e_other, v, true, true);
}
else {
BLI_assert(!BM_vert_is_edge_pair(v));
}
}
MEM_freeN(dissolve_verts);
}
/* cleanup */
if (delorig) {
BMO_op_finish(bm, &delop);
}
BMO_op_finish(bm, &dupeop);
}
/*
* Compute higher-quality vertex normals used by solidify.
* Only considers geometry in the marked solidify region.
* Note that this does not work so well for non-manifold
* regions.
*/
static void calc_solidify_normals(BMesh *bm)
{
BMIter viter, eiter, fiter;
BMVert *v;
BMEdge *e;
BMFace *f, *f1, *f2;
float edge_normal[3];
int i;
/* can't use BM_edge_face_count because we need to count only marked faces */
int *edge_face_count = static_cast<int *>(MEM_callocN(sizeof(int) * bm->totedge, __func__));
BM_ITER_MESH (v, &viter, bm, BM_VERTS_OF_MESH) {
BM_elem_flag_enable(v, BM_ELEM_TAG);
}
BM_mesh_elem_index_ensure(bm, BM_EDGE);
BM_ITER_MESH (f, &fiter, bm, BM_FACES_OF_MESH) {
if (!BMO_face_flag_test(bm, f, FACE_MARK)) {
continue;
}
BM_ITER_ELEM (e, &eiter, f, BM_EDGES_OF_FACE) {
/* And mark all edges and vertices on the
* marked faces */
BMO_edge_flag_enable(bm, e, EDGE_MARK);
BMO_vert_flag_enable(bm, e->v1, VERT_MARK);
BMO_vert_flag_enable(bm, e->v2, VERT_MARK);
edge_face_count[BM_elem_index_get(e)]++;
}
}
BM_ITER_MESH (e, &eiter, bm, BM_EDGES_OF_MESH) {
if (!BMO_edge_flag_test(bm, e, EDGE_MARK)) {
continue;
}
i = edge_face_count[BM_elem_index_get(e)];
if (i == 0 || i > 2) {
/* Edge & vertices are non-manifold even when considering
* only marked faces */
BMO_edge_flag_enable(bm, e, EDGE_NONMAN);
BMO_vert_flag_enable(bm, e->v1, VERT_NONMAN);
BMO_vert_flag_enable(bm, e->v2, VERT_NONMAN);
}
}
MEM_freeN(edge_face_count);
edge_face_count = nullptr; /* don't re-use */
BM_ITER_MESH (v, &viter, bm, BM_VERTS_OF_MESH) {
if (!BM_vert_is_manifold(v)) {
BMO_vert_flag_enable(bm, v, VERT_NONMAN);
continue;
}
if (BMO_vert_flag_test(bm, v, VERT_MARK)) {
zero_v3(v->no);
}
}
BM_ITER_MESH (e, &eiter, bm, BM_EDGES_OF_MESH) {
/* If the edge is not part of a the solidify region
* its normal should not be considered */
if (!BMO_edge_flag_test(bm, e, EDGE_MARK)) {
continue;
}
/* If the edge joins more than two marked faces high
* quality normal computation won't work */
if (BMO_edge_flag_test(bm, e, EDGE_NONMAN)) {
continue;
}
f1 = f2 = nullptr;
BM_ITER_ELEM (f, &fiter, e, BM_FACES_OF_EDGE) {
if (BMO_face_flag_test(bm, f, FACE_MARK)) {
if (f1 == nullptr) {
f1 = f;
}
else {
BLI_assert(f2 == nullptr);
f2 = f;
}
}
}
BLI_assert(f1 != nullptr);
if (f2 != nullptr) {
const float angle = angle_normalized_v3v3(f1->no, f2->no);
if (angle > 0.0f) {
/* two faces using this edge, calculate the edge normal
* using the angle between the faces as a weighting */
add_v3_v3v3(edge_normal, f1->no, f2->no);
normalize_v3_length(edge_normal, angle);
}
else {
/* can't do anything useful here!
* Set the face index for a vert in case it gets a zero normal */
BM_elem_flag_disable(e->v1, BM_ELEM_TAG);
BM_elem_flag_disable(e->v2, BM_ELEM_TAG);
continue;
}
}
else {
/* only one face attached to that edge */
/* an edge without another attached- the weight on this is undefined,
* M_PI_2 is 90d in radians and that seems good enough */
copy_v3_v3(edge_normal, f1->no);
mul_v3_fl(edge_normal, M_PI_2);
}
add_v3_v3(e->v1->no, edge_normal);
add_v3_v3(e->v2->no, edge_normal);
}
/* normalize accumulated vertex normal */
BM_ITER_MESH (v, &viter, bm, BM_VERTS_OF_MESH) {
if (!BMO_vert_flag_test(bm, v, VERT_MARK)) {
continue;
}
if (BMO_vert_flag_test(bm, v, VERT_NONMAN)) {
/* use standard normals for vertices connected to non-manifold edges */
BM_vert_normal_update(v);
}
else if (normalize_v3(v->no) == 0.0f && !BM_elem_flag_test(v, BM_ELEM_TAG)) {
/* exceptional case, totally flat. use the normal
* of any marked face around the vertex */
BM_ITER_ELEM (f, &fiter, v, BM_FACES_OF_VERT) {
if (BMO_face_flag_test(bm, f, FACE_MARK)) {
break;
}
}
copy_v3_v3(v->no, f->no);
}
}
}
static void solidify_add_thickness(BMesh *bm, const float dist)
{
BMFace *f;
BMVert *v;
BMLoop *l;
BMIter iter, loopIter;
float *vert_angles = static_cast<float *>(
MEM_callocN(sizeof(float) * bm->totvert * 2, "solidify")); /* 2 in 1 */
float *vert_accum = vert_angles + bm->totvert;
int i, index;
BLI_buffer_declare_static(float, face_angles_buf, BLI_BUFFER_NOP, BM_DEFAULT_NGON_STACK_SIZE);
BLI_buffer_declare_static(float *, verts_buf, BLI_BUFFER_NOP, BM_DEFAULT_NGON_STACK_SIZE);
BM_mesh_elem_index_ensure(bm, BM_VERT);
BM_ITER_MESH (f, &iter, bm, BM_FACES_OF_MESH) {
if (BMO_face_flag_test(bm, f, FACE_MARK)) {
/* array for passing verts to angle_poly_v3 */
float *face_angles = BLI_buffer_reinit_data(&face_angles_buf, float, f->len);
/* array for receiving angles from angle_poly_v3 */
float **verts = BLI_buffer_reinit_data(&verts_buf, float *, f->len);
BM_ITER_ELEM_INDEX (l, &loopIter, f, BM_LOOPS_OF_FACE, i) {
verts[i] = l->v->co;
}
angle_poly_v3(face_angles, (const float **)verts, f->len);
i = 0;
BM_ITER_ELEM (l, &loopIter, f, BM_LOOPS_OF_FACE) {
v = l->v;
index = BM_elem_index_get(v);
vert_accum[index] += face_angles[i];
vert_angles[index] += shell_v3v3_normalized_to_dist(v->no, f->no) * face_angles[i];
i++;
}
}
}
BLI_buffer_free(&face_angles_buf);
BLI_buffer_free(&verts_buf);
BM_ITER_MESH (v, &iter, bm, BM_VERTS_OF_MESH) {
index = BM_elem_index_get(v);
if (vert_accum[index]) { /* zero if unselected */
madd_v3_v3fl(v->co, v->no, dist * (vert_angles[index] / vert_accum[index]));
}
}
MEM_freeN(vert_angles);
}
void bmo_solidify_face_region_exec(BMesh *bm, BMOperator *op)
{
BMOperator extrudeop;
BMOperator reverseop;
float thickness;
thickness = BMO_slot_float_get(op->slots_in, "thickness");
/* Flip original faces (so the shell is extruded inward) */
BMO_op_init(bm, &reverseop, op->flag, "reverse_faces");
BMO_slot_bool_set(reverseop.slots_in, "flip_multires", true);
BMO_slot_copy(op, slots_in, "geom", &reverseop, slots_in, "faces");
BMO_op_exec(bm, &reverseop);
BMO_op_finish(bm, &reverseop);
/* Extrude the region */
BMO_op_initf(bm, &extrudeop, op->flag, "extrude_face_region use_keep_orig=%b", true);
BMO_slot_copy(op, slots_in, "geom", &extrudeop, slots_in, "geom");
BMO_op_exec(bm, &extrudeop);
/* Push the verts of the extruded faces inward to create thickness */
BMO_slot_buffer_flag_enable(bm, extrudeop.slots_out, "geom.out", BM_FACE, FACE_MARK);
calc_solidify_normals(bm);
solidify_add_thickness(bm, thickness);
BMO_slot_copy(&extrudeop, slots_out, "geom.out", op, slots_out, "geom.out");
BMO_op_finish(bm, &extrudeop);
}
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