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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor(s): Joseph Eagar.
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "MEM_guardedalloc.h"
#include "BLI_math.h"
#include "BLI_array.h"
#include "bmesh.h"
#include "intern/bmesh_operators_private.h" /* own include */
enum {
EXT_INPUT = 1,
EXT_KEEP = 2,
EXT_DEL = 4
};
#define VERT_MARK 1
#define EDGE_MARK 1
#define FACE_MARK 1
#define VERT_NONMAN 2
#define EDGE_NONMAN 2
void bmo_extrude_face_indiv_exec(BMesh *bm, BMOperator *op)
{
BMOIter siter;
BMIter liter, liter2;
BMFace *f, *f2, *f3;
BMLoop *l, *l2, *l3, *l4, *l_tmp;
BMEdge **edges = NULL, *e, *laste;
BMVert *v, *lastv, *firstv;
BLI_array_declare(edges);
int i;
BMO_ITER(f, &siter, bm, op, "faces", BM_FACE) {
BLI_array_empty(edges);
i = 0;
firstv = lastv = NULL;
BM_ITER(l, &liter, bm, BM_LOOPS_OF_FACE, f) {
BLI_array_growone(edges);
v = BM_vert_create(bm, l->v->co, l->v);
if (lastv) {
e = BM_edge_create(bm, lastv, v, l->e, FALSE);
edges[i++] = e;
}
lastv = v;
laste = l->e;
if (!firstv) firstv = v;
}
BLI_array_growone(edges);
e = BM_edge_create(bm, v, firstv, laste, FALSE);
edges[i++] = e;
BMO_elem_flag_enable(bm, f, EXT_DEL);
f2 = BM_face_create_ngon(bm, firstv, BM_edge_other_vert(edges[0], firstv), edges, f->len, FALSE);
if (!f2) {
BMO_error_raise(bm, op, BMERR_MESH_ERROR, "Extrude failed; could not create face");
BLI_array_free(edges);
return;
}
BMO_elem_flag_enable(bm, f2, EXT_KEEP);
BM_elem_attrs_copy(bm, bm, f, f2);
l2 = BM_iter_new(&liter2, bm, BM_LOOPS_OF_FACE, f2);
BM_ITER(l, &liter, bm, BM_LOOPS_OF_FACE, f) {
BM_elem_attrs_copy(bm, bm, l, l2);
l3 = l->next;
l4 = l2->next;
f3 = BM_face_create_quad_tri(bm, l3->v, l4->v, l2->v, l->v, f, FALSE);
l_tmp = BM_FACE_FIRST_LOOP(f3);
BM_elem_attrs_copy(bm, bm, l->next, l_tmp); l_tmp = l_tmp->next;
BM_elem_attrs_copy(bm, bm, l->next, l_tmp); l_tmp = l_tmp->next;
BM_elem_attrs_copy(bm, bm, l, l_tmp); l_tmp = l_tmp->next;
BM_elem_attrs_copy(bm, bm, l, l_tmp);
l2 = BM_iter_step(&liter2);
}
}
BLI_array_free(edges);
BMO_op_callf(bm, "del geom=%ff context=%i", EXT_DEL, DEL_ONLYFACES);
BMO_slot_buffer_from_flag(bm, op, "faceout", EXT_KEEP, BM_FACE);
}
void bmo_extrude_edge_only_exec(BMesh *bm, BMOperator *op)
{
BMOIter siter;
BMOperator dupeop;
BMVert *v1, *v2, *v3, *v4;
BMEdge *e, *e2;
BMFace *f;
BMO_ITER(e, &siter, bm, op, "edges", BM_EDGE) {
BMO_elem_flag_enable(bm, e, EXT_INPUT);
BMO_elem_flag_enable(bm, e->v1, EXT_INPUT);
BMO_elem_flag_enable(bm, e->v2, EXT_INPUT);
}
BMO_op_initf(bm, &dupeop, "dupe geom=%fve", EXT_INPUT);
BMO_op_exec(bm, &dupeop);
e = BMO_iter_new(&siter, bm, &dupeop, "boundarymap", 0);
for ( ; e; e = BMO_iter_step(&siter)) {
e2 = BMO_iter_map_value(&siter);
e2 = *(BMEdge **)e2;
if (e->l && e->v1 != e->l->v) {
v1 = e->v1;
v2 = e->v2;
v3 = e2->v2;
v4 = e2->v1;
}
else {
v1 = e2->v1;
v2 = e2->v2;
v3 = e->v2;
v4 = e->v1;
}
/* not sure what to do about example face, pass NULL for now */
f = BM_face_create_quad_tri(bm, v1, v2, v3, v4, NULL, FALSE);
if (BMO_elem_flag_test(bm, e, EXT_INPUT))
e = e2;
BMO_elem_flag_enable(bm, f, EXT_KEEP);
BMO_elem_flag_enable(bm, e, EXT_KEEP);
BMO_elem_flag_enable(bm, e->v1, EXT_KEEP);
BMO_elem_flag_enable(bm, e->v2, EXT_KEEP);
}
BMO_op_finish(bm, &dupeop);
BMO_slot_buffer_from_flag(bm, op, "geomout", EXT_KEEP, BM_ALL);
}
void bmo_extrude_vert_indiv_exec(BMesh *bm, BMOperator *op)
{
BMOIter siter;
BMVert *v, *dupev;
BMEdge *e;
v = BMO_iter_new(&siter, bm, op, "verts", BM_VERT);
for ( ; v; v = BMO_iter_step(&siter)) {
dupev = BM_vert_create(bm, v->co, v);
e = BM_edge_create(bm, v, dupev, NULL, FALSE);
BMO_elem_flag_enable(bm, e, EXT_KEEP);
BMO_elem_flag_enable(bm, dupev, EXT_KEEP);
}
BMO_slot_buffer_from_flag(bm, op, "vertout", EXT_KEEP, BM_VERT);
BMO_slot_buffer_from_flag(bm, op, "edgeout", EXT_KEEP, BM_EDGE);
}
void bmo_extrude_face_region_exec(BMesh *bm, BMOperator *op)
{
BMOperator dupeop, delop;
BMOIter siter;
BMIter iter, fiter, viter;
BMEdge *e, *newedge;
BMLoop *l, *l2;
BMVert *verts[4], *v, *v2;
BMFace *f;
int found, fwd, delorig = FALSE;
/* initialize our sub-operators */
BMO_op_init(bm, &dupeop, "dupe");
BMO_slot_buffer_flag_enable(bm, op, "edgefacein", EXT_INPUT, BM_EDGE|BM_FACE);
/* 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, "alwayskeeporig")) {
BM_ITER(e, &iter, bm, BM_EDGES_OF_MESH, NULL) {
int edge_face_tot;
if (!BMO_elem_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(f, &fiter, bm, BM_FACES_OF_EDGE, e) {
if (!BMO_elem_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_elem_flag_enable(bm, e, EXT_DEL);
}
}
}
/* calculate verts to delete */
BM_ITER(v, &iter, bm, BM_VERTS_OF_MESH, NULL) {
found = FALSE;
BM_ITER(e, &viter, bm, BM_EDGES_OF_VERT, v) {
if (!BMO_elem_flag_test(bm, e, EXT_INPUT) || !BMO_elem_flag_test(bm, e, EXT_DEL)) {
found = TRUE;
break;
}
}
/* avoid an extra loop */
if (found == TRUE) {
BM_ITER(f, &viter, bm, BM_FACES_OF_VERT, v) {
if (!BMO_elem_flag_test(bm, f, EXT_INPUT)) {
found = TRUE;
break;
}
}
}
if (found == FALSE) {
BMO_elem_flag_enable(bm, v, EXT_DEL);
}
}
BM_ITER(f, &iter, bm, BM_FACES_OF_MESH, NULL) {
if (BMO_elem_flag_test(bm, f, EXT_INPUT)) {
BMO_elem_flag_enable(bm, f, EXT_DEL);
}
}
if (delorig == TRUE) {
BMO_op_initf(bm, &delop, "del geom=%fvef context=%i",
EXT_DEL, DEL_ONLYTAGGED);
}
BMO_slot_copy(op, &dupeop, "edgefacein", "geom");
BMO_op_exec(bm, &dupeop);
if (bm->act_face && BMO_elem_flag_test(bm, bm->act_face, EXT_INPUT))
bm->act_face = BMO_slot_map_ptr_get(bm, &dupeop, "facemap", bm->act_face);
if (delorig) {
BMO_op_exec(bm, &delop);
}
/* if not delorig, reverse loops of original face */
if (!delorig) {
BM_ITER(f, &iter, bm, BM_FACES_OF_MESH, NULL) {
if (BMO_elem_flag_test(bm, f, EXT_INPUT)) {
BM_face_normal_flip(bm, f);
}
}
}
BMO_slot_copy(&dupeop, op, "newout", "geomout");
e = BMO_iter_new(&siter, bm, &dupeop, "boundarymap", 0);
for ( ; e; e = BMO_iter_step(&siter)) {
/* this should always be wire, so this is mainly a speedup to avoid map lookup */
if (BM_edge_is_wire(bm, e) && BMO_slot_map_contains(bm, op, "exclude", e)) {
/* The original edge was excluded,
* this would result in a standalone wire edge - see [#30399] */
BM_edge_kill(bm, e);
continue;
}
newedge = *(BMEdge **)BMO_iter_map_value(&siter);
if (!newedge) {
continue;
}
/* orient loop to give same normal as a loop of newedge
* if it exists (will be an extruded face),
* else same normal as a loop of e, if it exists */
if (!newedge->l)
fwd = !e->l || !(e->l->v == e->v1);
else
fwd = (newedge->l->v == newedge->v1);
if (fwd) {
verts[0] = e->v1;
verts[1] = e->v2;
verts[2] = newedge->v2;
verts[3] = newedge->v1;
}
else {
verts[3] = e->v1;
verts[2] = e->v2;
verts[1] = newedge->v2;
verts[0] = newedge->v1;
}
/* not sure what to do about example face, pass NULL for now */
f = BM_face_create_quad_tri_v(bm, verts, 4, NULL, FALSE);
/* copy attribute */
l = BM_iter_new(&iter, bm, BM_LOOPS_OF_FACE, f);
for ( ; l; l = BM_iter_step(&iter)) {
if (l->e != e && l->e != newedge) {
continue;
}
l2 = l->radial_next;
if (l2 == l) {
l2 = newedge->l;
BM_elem_attrs_copy(bm, bm, l2->f, l->f);
BM_elem_attrs_copy(bm, bm, l2, l);
l2 = l2->next;
l = l->next;
BM_elem_attrs_copy(bm, bm, l2, l);
}
else {
BM_elem_attrs_copy(bm, bm, l2->f, l->f);
/* copy dat */
if (l2->v == l->v) {
BM_elem_attrs_copy(bm, bm, l2, l);
l2 = l2->next;
l = l->next;
BM_elem_attrs_copy(bm, bm, l2, l);
}
else {
l2 = l2->next;
BM_elem_attrs_copy(bm, bm, l2, l);
l2 = l2->prev;
l = l->next;
BM_elem_attrs_copy(bm, bm, l2, l);
}
}
}
}
/* link isolated vert */
v = BMO_iter_new(&siter, bm, &dupeop, "isovertmap", 0);
for ( ; v; v = BMO_iter_step(&siter)) {
v2 = *((void **)BMO_iter_map_value(&siter));
BM_edge_create(bm, v, v2, v->e, TRUE);
}
/* 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 = MEM_callocN(sizeof(int) * bm->totedge, __func__);
BM_ITER(v, &viter, bm, BM_VERTS_OF_MESH, NULL) {
BM_elem_flag_enable(v, BM_ELEM_TAG);
}
BM_mesh_elem_index_ensure(bm, BM_EDGE);
BM_ITER(f, &fiter, bm, BM_FACES_OF_MESH, NULL) {
if (!BMO_elem_flag_test(bm, f, FACE_MARK)) {
continue;
}
BM_ITER(e, &eiter, bm, BM_EDGES_OF_FACE, f) {
/* And mark all edges and vertices on the
* marked faces */
BMO_elem_flag_enable(bm, e, EDGE_MARK);
BMO_elem_flag_enable(bm, e->v1, VERT_MARK);
BMO_elem_flag_enable(bm, e->v2, VERT_MARK);
edge_face_count[BM_elem_index_get(e)]++;
}
}
BM_ITER(e, &eiter, bm, BM_EDGES_OF_MESH, NULL) {
if (!BMO_elem_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_elem_flag_enable(bm, e, EDGE_NONMAN);
BMO_elem_flag_enable(bm, e->v1, VERT_NONMAN);
BMO_elem_flag_enable(bm, e->v2, VERT_NONMAN);
}
}
MEM_freeN(edge_face_count);
edge_face_count = NULL; /* don't re-use */
BM_ITER(v, &viter, bm, BM_VERTS_OF_MESH, NULL) {
if (!BM_vert_is_manifold(bm, v)) {
BMO_elem_flag_enable(bm, v, VERT_NONMAN);
continue;
}
if (BMO_elem_flag_test(bm, v, VERT_MARK)) {
zero_v3(v->no);
}
}
BM_ITER(e, &eiter, bm, BM_EDGES_OF_MESH, NULL) {
/* If the edge is not part of a the solidify region
* its normal should not be considered */
if (!BMO_elem_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_elem_flag_test(bm, e, EDGE_NONMAN)) {
continue;
}
f1 = f2 = NULL;
BM_ITER(f, &fiter, bm, BM_FACES_OF_EDGE, e) {
if (BMO_elem_flag_test(bm, f, FACE_MARK)) {
if (f1 == NULL) {
f1 = f;
}
else {
BLI_assert(f2 == NULL);
f2 = f;
}
}
}
BLI_assert(f1 != NULL);
if (f2 != NULL) {
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(edge_normal);
mul_v3_fl(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(v, &viter, bm, BM_VERTS_OF_MESH, NULL) {
if (!BMO_elem_flag_test(bm, v, VERT_MARK)) {
continue;
}
if (BMO_elem_flag_test(bm, v, VERT_NONMAN)) {
/* use standard normals for vertices connected to non-manifold edges */
BM_vert_normal_update(bm, 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(f, &fiter, bm, BM_FACES_OF_VERT, v) {
if (BMO_elem_flag_test(bm, f, FACE_MARK)) {
break;
}
}
copy_v3_v3(v->no, f->no);
}
}
}
static void solidify_add_thickness(BMesh *bm, float dist)
{
BMFace *f;
BMVert *v;
BMLoop *l;
BMIter iter, loopIter;
float *vert_angles = MEM_callocN(sizeof(float) * bm->totvert * 2, "solidify"); /* 2 in 1 */
float *vert_accum = vert_angles + bm->totvert;
float angle;
int i, index;
float maxdist = dist * sqrtf(3.0f);
/* array for passing verts to angle_poly_v3 */
float **verts = NULL;
BLI_array_staticdeclare(verts, BM_NGON_STACK_SIZE);
/* array for receiving angles from angle_poly_v3 */
float *angles = NULL;
BLI_array_staticdeclare(angles, BM_NGON_STACK_SIZE);
BM_mesh_elem_index_ensure(bm, BM_VERT);
BM_ITER(f, &iter, bm, BM_FACES_OF_MESH, NULL) {
if (!BMO_elem_flag_test(bm, f, FACE_MARK)) {
continue;
}
BM_ITER(l, &loopIter, bm, BM_LOOPS_OF_FACE, f) {
BLI_array_append(verts, l->v->co);
BLI_array_growone(angles);
}
angle_poly_v3(angles, (const float **)verts, f->len);
i = 0;
BM_ITER(l, &loopIter, bm, BM_LOOPS_OF_FACE, f) {
v = l->v;
index = BM_elem_index_get(v);
angle = angles[i];
vert_accum[index] += angle;
vert_angles[index] += shell_angle_to_dist(angle_normalized_v3v3(v->no, f->no)) * angle;
i++;
}
BLI_array_empty(verts);
BLI_array_empty(angles);
}
BM_ITER(v, &iter, bm, BM_VERTS_OF_MESH, NULL) {
index = BM_elem_index_get(v);
if (vert_accum[index]) { /* zero if unselected */
float vdist = MIN2(maxdist, dist * vert_angles[index] / vert_accum[index]);
madd_v3_v3fl(v->co, v->no, vdist);
}
}
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, "thickness");
/* Flip original faces (so the shell is extruded inward) */
BMO_op_init(bm, &reverseop, "reversefaces");
BMO_slot_copy(op, &reverseop, "geom", "faces");
BMO_op_exec(bm, &reverseop);
BMO_op_finish(bm, &reverseop);
/* Extrude the region */
BMO_op_initf(bm, &extrudeop, "extrude_face_region alwayskeeporig=%b", TRUE);
BMO_slot_copy(op, &extrudeop, "geom", "edgefacein");
BMO_op_exec(bm, &extrudeop);
/* Push the verts of the extruded faces inward to create thickness */
BMO_slot_buffer_flag_enable(bm, &extrudeop, "geomout", FACE_MARK, BM_FACE);
calc_solidify_normals(bm);
solidify_add_thickness(bm, thickness);
BMO_slot_copy(&extrudeop, op, "geomout", "geomout");
BMO_op_finish(bm, &extrudeop);
}
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