unsigned int BLI_scanfill_calc_ex(ScanFillContext *sf_ctx, const int flag, const float nor_proj[3])
{
/*
* - fill works with its own lists, so create that first (no faces!)
* - for vertices, put in ->tmp.v the old pointer
* - struct elements xs en ys are not used here: don't hide stuff in it
* - edge flag ->f becomes 2 when it's a new edge
* - mode: & 1 is check for crossings, then create edges (TO DO )
* - returns number of triangle faces added.
*/
ListBase tempve, temped;
ScanFillVert *eve;
ScanFillEdge *eed, *eed_next;
PolyFill *pflist, *pf;
float *min_xy_p, *max_xy_p;
unsigned int totfaces = 0; /* total faces added */
unsigned short a, c, poly = 0;
bool ok;
float mat_2d[3][3];
BLI_assert(!nor_proj || len_squared_v3(nor_proj) > FLT_EPSILON);
#ifdef DEBUG
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
/* these values used to be set,
* however they should always be zero'd so check instead */
BLI_assert(eve->f == 0);
BLI_assert(sf_ctx->poly_nr || eve->poly_nr == 0);
BLI_assert(eve->edge_tot == 0);
}
#endif
#if 0
if (flag & BLI_SCANFILL_CALC_QUADTRI_FASTPATH) {
const int totverts = BLI_countlist(&sf_ctx->fillvertbase);
if (totverts == 3) {
eve = sf_ctx->fillvertbase.first;
addfillface(sf_ctx, eve, eve->next, eve->next->next);
return 1;
}
else if (totverts == 4) {
float vec1[3], vec2[3];
eve = sf_ctx->fillvertbase.first;
/* no need to check 'eve->next->next->next' is valid, already counted */
/* use shortest diagonal for quad */
sub_v3_v3v3(vec1, eve->co, eve->next->next->co);
sub_v3_v3v3(vec2, eve->next->co, eve->next->next->next->co);
if (dot_v3v3(vec1, vec1) < dot_v3v3(vec2, vec2)) {
addfillface(sf_ctx, eve, eve->next, eve->next->next);
addfillface(sf_ctx, eve->next->next, eve->next->next->next, eve);
}
else {
addfillface(sf_ctx, eve->next, eve->next->next, eve->next->next->next);
addfillface(sf_ctx, eve->next->next->next, eve, eve->next);
}
return 2;
}
}
#endif
/* first test vertices if they are in edges */
/* including resetting of flags */
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
BLI_assert(sf_ctx->poly_nr != SF_POLY_UNSET || eed->poly_nr == SF_POLY_UNSET);
eed->v1->f = SF_VERT_AVAILABLE;
eed->v2->f = SF_VERT_AVAILABLE;
}
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
if (eve->f == SF_VERT_AVAILABLE) {
break;
}
}
if (UNLIKELY(eve == NULL)) {
return 0;
}
else {
float n[3];
if (nor_proj) {
copy_v3_v3(n, nor_proj);
}
else {
/* define projection: with 'best' normal */
/* Newell's Method */
/* Similar code used elsewhere, but this checks for double ups
* which historically this function supports so better not change */
/* warning: this only gives stable direction with single polygons,
* ideally we'd calcualte connectivity and calculate each polys normal, see T41047 */
const float *v_prev;
zero_v3(n);
eve = sf_ctx->fillvertbase.last;
v_prev = eve->co;
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
if (LIKELY(!compare_v3v3(v_prev, eve->co, SF_EPSILON))) {
add_newell_cross_v3_v3v3(n, v_prev, eve->co);
v_prev = eve->co;
}
}
}
if (UNLIKELY(normalize_v3(n) == 0.0f)) {
return 0;
}
axis_dominant_v3_to_m3(mat_2d, n);
}
/* STEP 1: COUNT POLYS */
if (sf_ctx->poly_nr != SF_POLY_UNSET) {
poly = (unsigned short)(sf_ctx->poly_nr + 1);
sf_ctx->poly_nr = SF_POLY_UNSET;
}
if (flag & BLI_SCANFILL_CALC_POLYS && (poly == 0)) {
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
mul_v2_m3v3(eve->xy, mat_2d, eve->co);
/* get first vertex with no poly number */
if (eve->poly_nr == SF_POLY_UNSET) {
unsigned int toggle = 0;
/* now a sort of select connected */
ok = true;
eve->poly_nr = poly;
while (ok) {
ok = false;
toggle++;
for (eed = (toggle & 1) ? sf_ctx->filledgebase.first : sf_ctx->filledgebase.last;
eed;
eed = (toggle & 1) ? eed->next : eed->prev)
{
if (eed->v1->poly_nr == SF_POLY_UNSET && eed->v2->poly_nr == poly) {
eed->v1->poly_nr = poly;
eed->poly_nr = poly;
ok = true;
}
else if (eed->v2->poly_nr == SF_POLY_UNSET && eed->v1->poly_nr == poly) {
eed->v2->poly_nr = poly;
eed->poly_nr = poly;
ok = true;
}
else if (eed->poly_nr == SF_POLY_UNSET) {
if (eed->v1->poly_nr == poly && eed->v2->poly_nr == poly) {
eed->poly_nr = poly;
ok = true;
}
}
}
}
poly++;
}
}
/* printf("amount of poly's: %d\n", poly); */
}
else if (poly) {
/* we pre-calculated poly_nr */
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
mul_v2_m3v3(eve->xy, mat_2d, eve->co);
}
}
else {
poly = 1;
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
mul_v2_m3v3(eve->xy, mat_2d, eve->co);
eve->poly_nr = 0;
}
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
eed->poly_nr = 0;
}
}
/* STEP 2: remove loose edges and strings of edges */
if (flag & BLI_SCANFILL_CALC_LOOSE) {
unsigned int toggle = 0;
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
if (eed->v1->edge_tot++ > 250) break;
if (eed->v2->edge_tot++ > 250) break;
}
if (eed) {
/* otherwise it's impossible to be sure you can clear vertices */
#ifdef DEBUG
printf("No vertices with 250 edges allowed!\n");
#endif
return 0;
}
/* does it only for vertices with (->edge_tot == 1) */
testvertexnearedge(sf_ctx);
ok = true;
while (ok) {
ok = false;
toggle++;
for (eed = (toggle & 1) ? sf_ctx->filledgebase.first : sf_ctx->filledgebase.last;
eed;
eed = eed_next)
{
eed_next = (toggle & 1) ? eed->next : eed->prev;
if (eed->v1->edge_tot == 1) {
eed->v2->edge_tot--;
BLI_remlink(&sf_ctx->fillvertbase, eed->v1);
BLI_remlink(&sf_ctx->filledgebase, eed);
ok = true;
}
else if (eed->v2->edge_tot == 1) {
eed->v1->edge_tot--;
BLI_remlink(&sf_ctx->fillvertbase, eed->v2);
BLI_remlink(&sf_ctx->filledgebase, eed);
ok = true;
}
}
}
if (BLI_listbase_is_empty(&sf_ctx->filledgebase)) {
/* printf("All edges removed\n"); */
return 0;
}
}
else {
/* skip checks for loose edges */
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
eed->v1->edge_tot++;
eed->v2->edge_tot++;
}
#ifdef DEBUG
/* ensure we're right! */
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
BLI_assert(eed->v1->edge_tot != 1);
BLI_assert(eed->v2->edge_tot != 1);
}
#endif
}
/* CURRENT STATUS:
* - eve->f :1 = available in edges
* - eve->poly_nr :polynumber
* - eve->edge_tot :amount of edges connected to vertex
* - eve->tmp.v :store! original vertex number
*
* - eed->f :1 = boundary edge (optionally set by caller)
* - eed->poly_nr :poly number
*/
/* STEP 3: MAKE POLYFILL STRUCT */
pflist = MEM_mallocN(sizeof(*pflist) * (size_t)poly, "edgefill");
pf = pflist;
for (a = 0; a < poly; a++) {
pf->edges = pf->verts = 0;
pf->min_xy[0] = pf->min_xy[1] = 1.0e20f;
pf->max_xy[0] = pf->max_xy[1] = -1.0e20f;
pf->f = SF_POLY_NEW;
pf->nr = a;
pf++;
}
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
pflist[eed->poly_nr].edges++;
}
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
pflist[eve->poly_nr].verts++;
min_xy_p = pflist[eve->poly_nr].min_xy;
max_xy_p = pflist[eve->poly_nr].max_xy;
min_xy_p[0] = (min_xy_p[0]) < (eve->xy[0]) ? (min_xy_p[0]) : (eve->xy[0]);
min_xy_p[1] = (min_xy_p[1]) < (eve->xy[1]) ? (min_xy_p[1]) : (eve->xy[1]);
max_xy_p[0] = (max_xy_p[0]) > (eve->xy[0]) ? (max_xy_p[0]) : (eve->xy[0]);
max_xy_p[1] = (max_xy_p[1]) > (eve->xy[1]) ? (max_xy_p[1]) : (eve->xy[1]);
if (eve->edge_tot > 2) {
pflist[eve->poly_nr].f = SF_POLY_VALID;
}
}
/* STEP 4: FIND HOLES OR BOUNDS, JOIN THEM
* ( bounds just to divide it in pieces for optimization,
* the edgefill itself has good auto-hole detection)
* WATCH IT: ONLY WORKS WITH SORTED POLYS!!! */
if ((flag & BLI_SCANFILL_CALC_HOLES) && (poly > 1)) {
unsigned short *polycache, *pc;
/* so, sort first */
qsort(pflist, (size_t)poly, sizeof(PolyFill), vergpoly);
#if 0
pf = pflist;
for (a = 0; a < poly; a++) {
printf("poly:%d edges:%d verts:%d flag: %d\n", a, pf->edges, pf->verts, pf->f);
PRINT2(f, f, pf->min[0], pf->min[1]);
pf++;
}
#endif
polycache = pc = MEM_callocN(sizeof(*polycache) * (size_t)poly, "polycache");
pf = pflist;
for (a = 0; a < poly; a++, pf++) {
for (c = (unsigned short)(a + 1); c < poly; c++) {
/* if 'a' inside 'c': join (bbox too)
* Careful: 'a' can also be inside another poly.
*/
if (boundisect(pf, pflist + c)) {
*pc = c;
pc++;
}
/* only for optimize! */
/* else if (pf->max_xy[0] < (pflist+c)->min[cox]) break; */
}
while (pc != polycache) {
pc--;
mergepolysSimp(sf_ctx, pf, pflist + *pc);
}
}
MEM_freeN(polycache);
}
#if 0
printf("after merge\n");
pf = pflist;
for (a = 0; a < poly; a++) {
printf("poly:%d edges:%d verts:%d flag: %d\n", a, pf->edges, pf->verts, pf->f);
pf++;
}
#endif
/* STEP 5: MAKE TRIANGLES */
tempve.first = sf_ctx->fillvertbase.first;
tempve.last = sf_ctx->fillvertbase.last;
temped.first = sf_ctx->filledgebase.first;
temped.last = sf_ctx->filledgebase.last;
BLI_listbase_clear(&sf_ctx->fillvertbase);
BLI_listbase_clear(&sf_ctx->filledgebase);
pf = pflist;
for (a = 0; a < poly; a++) {
if (pf->edges > 1) {
splitlist(sf_ctx, &tempve, &temped, pf->nr);
totfaces += scanfill(sf_ctx, pf, flag);
}
pf++;
}
BLI_movelisttolist(&sf_ctx->fillvertbase, &tempve);
BLI_movelisttolist(&sf_ctx->filledgebase, &temped);
/* FREE */
MEM_freeN(pflist);
return totfaces;
}
static unsigned int scanfill(ScanFillContext *sf_ctx, PolyFill *pf, const int flag)
{
ScanFillVertLink *scdata;
ScanFillVertLink *sc = NULL, *sc1;
ScanFillVert *eve, *v1, *v2, *v3;
ScanFillEdge *eed, *eed_next, *ed1, *ed2, *ed3;
unsigned int a, b, verts, maxface, totface;
const unsigned short nr = pf->nr;
bool twoconnected = false;
/* PRINTS */
#if 0
verts = pf->verts;
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
printf("vert: %x co: %f %f\n", eve, eve->xy[0], eve->xy[1]);
}
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
printf("edge: %x verts: %x %x\n", eed, eed->v1, eed->v2);
}
#endif
/* STEP 0: remove zero sized edges */
if (flag & BLI_SCANFILL_CALC_REMOVE_DOUBLES) {
for (eed = sf_ctx->filledgebase.first; eed; eed = eed->next) {
if (equals_v2v2(eed->v1->xy, eed->v2->xy)) {
if (eed->v1->f == SF_VERT_ZERO_LEN && eed->v2->f != SF_VERT_ZERO_LEN) {
eed->v2->f = SF_VERT_ZERO_LEN;
eed->v2->tmp.v = eed->v1->tmp.v;
}
else if (eed->v2->f == SF_VERT_ZERO_LEN && eed->v1->f != SF_VERT_ZERO_LEN) {
eed->v1->f = SF_VERT_ZERO_LEN;
eed->v1->tmp.v = eed->v2->tmp.v;
}
else if (eed->v2->f == SF_VERT_ZERO_LEN && eed->v1->f == SF_VERT_ZERO_LEN) {
eed->v1->tmp.v = eed->v2->tmp.v;
}
else {
eed->v2->f = SF_VERT_ZERO_LEN;
eed->v2->tmp.v = eed->v1;
}
}
}
}
/* STEP 1: make using FillVert and FillEdge lists a sorted
* ScanFillVertLink list
*/
sc = scdata = MEM_mallocN(sizeof(*scdata) * pf->verts, "Scanfill1");
verts = 0;
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
if (eve->poly_nr == nr) {
if (eve->f != SF_VERT_ZERO_LEN) {
verts++;
eve->f = SF_VERT_NEW; /* flag for connectedges later on */
sc->vert = eve;
sc->edge_first = sc->edge_last = NULL;
/* if (even->tmp.v == NULL) eve->tmp.u = verts; */ /* Note, debug print only will work for curve polyfill, union is in use for mesh */
sc++;
}
}
}
qsort(scdata, verts, sizeof(ScanFillVertLink), vergscdata);
if (flag & BLI_SCANFILL_CALC_REMOVE_DOUBLES) {
for (eed = sf_ctx->filledgebase.first; eed; eed = eed_next) {
eed_next = eed->next;
BLI_remlink(&sf_ctx->filledgebase, eed);
/* This code is for handling zero-length edges that get
* collapsed in step 0. It was removed for some time to
* fix trunk bug #4544, so if that comes back, this code
* may need some work, or there will have to be a better
* fix to #4544.
*
* warning, this can hang on un-ordered edges, see: [#33281]
* for now disable 'BLI_SCANFILL_CALC_REMOVE_DOUBLES' for ngons.
*/
if (eed->v1->f == SF_VERT_ZERO_LEN) {
v1 = eed->v1;
while ((eed->v1->f == SF_VERT_ZERO_LEN) && (eed->v1->tmp.v != v1) && (eed->v1 != eed->v1->tmp.v))
eed->v1 = eed->v1->tmp.v;
}
if (eed->v2->f == SF_VERT_ZERO_LEN) {
v2 = eed->v2;
while ((eed->v2->f == SF_VERT_ZERO_LEN) && (eed->v2->tmp.v != v2) && (eed->v2 != eed->v2->tmp.v))
eed->v2 = eed->v2->tmp.v;
}
if (eed->v1 != eed->v2) {
addedgetoscanlist(scdata, eed, verts);
}
}
}
else {
for (eed = sf_ctx->filledgebase.first; eed; eed = eed_next) {
eed_next = eed->next;
BLI_remlink(&sf_ctx->filledgebase, eed);
if (eed->v1 != eed->v2) {
addedgetoscanlist(scdata, eed, verts);
}
}
}
#if 0
sc = sf_ctx->_scdata;
for (a = 0; a < verts; a++) {
printf("\nscvert: %x\n", sc->vert);
for (eed = sc->edge_first; eed; eed = eed->next) {
printf(" ed %x %x %x\n", eed, eed->v1, eed->v2);
}
sc++;
}
#endif
/* STEP 2: FILL LOOP */
if (pf->f == SF_POLY_NEW)
twoconnected = true;
/* (temporal) security: never much more faces than vertices */
totface = 0;
if (flag & BLI_SCANFILL_CALC_HOLES) {
maxface = 2 * verts; /* 2*verts: based at a filled circle within a triangle */
}
else {
maxface = verts - 2; /* when we don't calc any holes, we assume face is a non overlapping loop */
}
sc = scdata;
for (a = 0; a < verts; a++) {
/* printf("VERTEX %d index %d\n", a, sc->vert->tmp.u); */
/* set connectflags */
for (ed1 = sc->edge_first; ed1; ed1 = eed_next) {
eed_next = ed1->next;
if (ed1->v1->edge_tot == 1 || ed1->v2->edge_tot == 1) {
BLI_remlink((ListBase *)&(sc->edge_first), ed1);
BLI_addtail(&sf_ctx->filledgebase, ed1);
if (ed1->v1->edge_tot > 1) ed1->v1->edge_tot--;
if (ed1->v2->edge_tot > 1) ed1->v2->edge_tot--;
}
else {
ed1->v2->f = SF_VERT_AVAILABLE;
}
}
while (sc->edge_first) { /* for as long there are edges */
ed1 = sc->edge_first;
ed2 = ed1->next;
/* commented out... the ESC here delivers corrupted memory (and doesnt work during grab) */
/* if (callLocalInterruptCallBack()) break; */
if (totface >= maxface) {
/* printf("Fill error: endless loop. Escaped at vert %d, tot: %d.\n", a, verts); */
a = verts;
break;
}
if (ed2 == NULL) {
sc->edge_first = sc->edge_last = NULL;
/* printf("just 1 edge to vert\n"); */
BLI_addtail(&sf_ctx->filledgebase, ed1);
ed1->v2->f = SF_VERT_NEW;
ed1->v1->edge_tot--;
ed1->v2->edge_tot--;
}
else {
/* test rest of vertices */
ScanFillVertLink *best_sc = NULL;
float best_angle = 3.14f;
float miny;
bool firsttime = false;
v1 = ed1->v2;
v2 = ed1->v1;
v3 = ed2->v2;
/* this happens with a serial of overlapping edges */
if (v1 == v2 || v2 == v3) break;
/* printf("test verts %d %d %d\n", v1->tmp.u, v2->tmp.u, v3->tmp.u); */
miny = min_ff(v1->xy[1], v3->xy[1]);
sc1 = sc + 1;
for (b = a + 1; b < verts; b++, sc1++) {
if (sc1->vert->f == SF_VERT_NEW) {
if (sc1->vert->xy[1] <= miny) break;
if (testedgeside(v1->xy, v2->xy, sc1->vert->xy)) {
if (testedgeside(v2->xy, v3->xy, sc1->vert->xy)) {
if (testedgeside(v3->xy, v1->xy, sc1->vert->xy)) {
/* point is in triangle */
/* because multiple points can be inside triangle (concave holes) */
/* we continue searching and pick the one with sharpest corner */
if (best_sc == NULL) {
/* even without holes we need to keep checking [#35861] */
best_sc = sc1;
}
else {
float angle;
/* prevent angle calc for the simple cases only 1 vertex is found */
if (firsttime == false) {
best_angle = angle_v2v2v2(v2->xy, v1->xy, best_sc->vert->xy);
firsttime = true;
}
angle = angle_v2v2v2(v2->xy, v1->xy, sc1->vert->xy);
if (angle < best_angle) {
best_sc = sc1;
best_angle = angle;
}
}
}
}
}
}
}
if (best_sc) {
/* make new edge, and start over */
/* printf("add new edge %d %d and start again\n", v2->tmp.u, best_sc->vert->tmp.u); */
ed3 = BLI_scanfill_edge_add(sf_ctx, v2, best_sc->vert);
BLI_remlink(&sf_ctx->filledgebase, ed3);
BLI_insertlinkbefore((ListBase *)&(sc->edge_first), ed2, ed3);
ed3->v2->f = SF_VERT_AVAILABLE;
ed3->f = SF_EDGE_INTERNAL;
ed3->v1->edge_tot++;
ed3->v2->edge_tot++;
}
else {
/* new triangle */
/* printf("add face %d %d %d\n", v1->tmp.u, v2->tmp.u, v3->tmp.u); */
addfillface(sf_ctx, v1, v2, v3);
totface++;
BLI_remlink((ListBase *)&(sc->edge_first), ed1);
BLI_addtail(&sf_ctx->filledgebase, ed1);
ed1->v2->f = SF_VERT_NEW;
ed1->v1->edge_tot--;
ed1->v2->edge_tot--;
/* ed2 can be removed when it's a boundary edge */
if (((ed2->f == SF_EDGE_NEW) && twoconnected) /* || (ed2->f == SF_EDGE_BOUNDARY) */) {
BLI_remlink((ListBase *)&(sc->edge_first), ed2);
BLI_addtail(&sf_ctx->filledgebase, ed2);
ed2->v2->f = SF_VERT_NEW;
ed2->v1->edge_tot--;
ed2->v2->edge_tot--;
}
/* new edge */
ed3 = BLI_scanfill_edge_add(sf_ctx, v1, v3);
BLI_remlink(&sf_ctx->filledgebase, ed3);
ed3->f = SF_EDGE_INTERNAL;
ed3->v1->edge_tot++;
ed3->v2->edge_tot++;
/* printf("add new edge %x %x\n", v1, v3); */
sc1 = addedgetoscanlist(scdata, ed3, verts);
if (sc1) { /* ed3 already exists: remove if a boundary */
/* printf("Edge exists\n"); */
ed3->v1->edge_tot--;
ed3->v2->edge_tot--;
for (ed3 = sc1->edge_first; ed3; ed3 = ed3->next) {
if ((ed3->v1 == v1 && ed3->v2 == v3) || (ed3->v1 == v3 && ed3->v2 == v1)) {
if (twoconnected /* || (ed3->f == SF_EDGE_BOUNDARY) */) {
BLI_remlink((ListBase *)&(sc1->edge_first), ed3);
BLI_addtail(&sf_ctx->filledgebase, ed3);
ed3->v1->edge_tot--;
ed3->v2->edge_tot--;
}
break;
}
}
}
}
}
/* test for loose edges */
for (ed1 = sc->edge_first; ed1; ed1 = eed_next) {
eed_next = ed1->next;
if (ed1->v1->edge_tot < 2 || ed1->v2->edge_tot < 2) {
BLI_remlink((ListBase *)&(sc->edge_first), ed1);
BLI_addtail(&sf_ctx->filledgebase, ed1);
if (ed1->v1->edge_tot > 1) ed1->v1->edge_tot--;
if (ed1->v2->edge_tot > 1) ed1->v2->edge_tot--;
}
}
/* done with loose edges */
}
sc++;
}
MEM_freeN(scdata);
BLI_assert(totface <= maxface);
return totface;
}
int BLI_edgefill_ex(ScanFillContext *sf_ctx, const short do_quad_tri_speedup, const float nor_proj[3])
{
/*
* - fill works with its own lists, so create that first (no faces!)
* - for vertices, put in ->tmp.v the old pointer
* - struct elements xs en ys are not used here: don't hide stuff in it
* - edge flag ->f becomes 2 when it's a new edge
* - mode: & 1 is check for crossings, then create edges (TO DO )
* - returns number of triangle faces added.
*/
ListBase tempve, temped;
ScanFillVert *eve;
ScanFillEdge *eed, *nexted;
PolyFill *pflist, *pf;
float *min_xy_p, *max_xy_p;
short a, c, poly = 0, ok = 0, toggle = 0;
int totfaces = 0; /* total faces added */
int co_x, co_y;
/* reset variables */
eve = sf_ctx->fillvertbase.first;
a = 0;
while (eve) {
eve->f = 0;
eve->poly_nr = 0;
eve->h = 0;
eve = eve->next;
a += 1;
}
if (do_quad_tri_speedup && (a == 3)) {
eve = sf_ctx->fillvertbase.first;
addfillface(sf_ctx, eve, eve->next, eve->next->next);
return 1;
}
else if (do_quad_tri_speedup && (a == 4)) {
float vec1[3], vec2[3];
eve = sf_ctx->fillvertbase.first;
/* no need to check 'eve->next->next->next' is valid, already counted */
/* use shortest diagonal for quad */
sub_v3_v3v3(vec1, eve->co, eve->next->next->co);
sub_v3_v3v3(vec2, eve->next->co, eve->next->next->next->co);
if (dot_v3v3(vec1, vec1) < dot_v3v3(vec2, vec2)) {
addfillface(sf_ctx, eve, eve->next, eve->next->next);
addfillface(sf_ctx, eve->next->next, eve->next->next->next, eve);
}
else {
addfillface(sf_ctx, eve->next, eve->next->next, eve->next->next->next);
addfillface(sf_ctx, eve->next->next->next, eve, eve->next);
}
return 2;
}
/* first test vertices if they are in edges */
/* including resetting of flags */
eed = sf_ctx->filledgebase.first;
while (eed) {
eed->poly_nr = 0;
eed->v1->f = SF_VERT_UNKNOWN;
eed->v2->f = SF_VERT_UNKNOWN;
eed = eed->next;
}
eve = sf_ctx->fillvertbase.first;
while (eve) {
if (eve->f & SF_VERT_UNKNOWN) {
ok = 1;
break;
}
eve = eve->next;
}
if (ok == 0) {
return 0;
}
else {
float n[3];
if (nor_proj) {
copy_v3_v3(n, nor_proj);
}
else {
/* define projection: with 'best' normal */
/* Newell's Method */
/* Similar code used elsewhere, but this checks for double ups
* which historically this function supports so better not change */
float *v_prev;
zero_v3(n);
eve = sf_ctx->fillvertbase.last;
v_prev = eve->co;
for (eve = sf_ctx->fillvertbase.first; eve; eve = eve->next) {
if (LIKELY(!compare_v3v3(v_prev, eve->co, SF_EPSILON))) {
add_newell_cross_v3_v3v3(n, v_prev, eve->co);
v_prev = eve->co;
}
}
}
if (UNLIKELY(normalize_v3(n) == 0.0f)) {
return 0;
}
axis_dominant_v3(&co_x, &co_y, n);
}
/* STEP 1: COUNT POLYS */
eve = sf_ctx->fillvertbase.first;
while (eve) {
eve->xy[0] = eve->co[co_x];
eve->xy[1] = eve->co[co_y];
/* get first vertex with no poly number */
if (eve->poly_nr == 0) {
poly++;
/* now a sort of select connected */
ok = 1;
eve->poly_nr = poly;
while (ok) {
ok = 0;
toggle++;
if (toggle & 1) eed = sf_ctx->filledgebase.first;
else eed = sf_ctx->filledgebase.last;
while (eed) {
if (eed->v1->poly_nr == 0 && eed->v2->poly_nr == poly) {
eed->v1->poly_nr = poly;
eed->poly_nr = poly;
ok = 1;
}
else if (eed->v2->poly_nr == 0 && eed->v1->poly_nr == poly) {
eed->v2->poly_nr = poly;
eed->poly_nr = poly;
ok = 1;
}
else if (eed->poly_nr == 0) {
if (eed->v1->poly_nr == poly && eed->v2->poly_nr == poly) {
eed->poly_nr = poly;
ok = 1;
}
}
if (toggle & 1) eed = eed->next;
else eed = eed->prev;
}
}
}
eve = eve->next;
}
/* printf("amount of poly's: %d\n",poly); */
/* STEP 2: remove loose edges and strings of edges */
eed = sf_ctx->filledgebase.first;
while (eed) {
if (eed->v1->h++ > 250) break;
if (eed->v2->h++ > 250) break;
eed = eed->next;
}
if (eed) {
/* otherwise it's impossible to be sure you can clear vertices */
callLocalErrorCallBack("No vertices with 250 edges allowed!");
return 0;
}
/* does it only for vertices with ->h==1 */
testvertexnearedge(sf_ctx);
ok = 1;
while (ok) {
ok = 0;
toggle++;
if (toggle & 1) eed = sf_ctx->filledgebase.first;
else eed = sf_ctx->filledgebase.last;
while (eed) {
if (toggle & 1) nexted = eed->next;
else nexted = eed->prev;
if (eed->v1->h == 1) {
eed->v2->h--;
BLI_remlink(&sf_ctx->fillvertbase, eed->v1);
BLI_remlink(&sf_ctx->filledgebase, eed);
ok = 1;
}
else if (eed->v2->h == 1) {
eed->v1->h--;
BLI_remlink(&sf_ctx->fillvertbase, eed->v2);
BLI_remlink(&sf_ctx->filledgebase, eed);
ok = 1;
}
eed = nexted;
}
}
if (sf_ctx->filledgebase.first == 0) {
/* printf("All edges removed\n"); */
return 0;
}
/* CURRENT STATUS:
* - eve->f :1= availalble in edges
* - eve->xs :polynumber
* - eve->h :amount of edges connected to vertex
* - eve->tmp.v :store! original vertex number
*
* - eed->f :1= boundary edge (optionally set by caller)
* - eed->poly_nr :poly number
*/
/* STEP 3: MAKE POLYFILL STRUCT */
pflist = (PolyFill *)MEM_callocN(poly * sizeof(PolyFill), "edgefill");
pf = pflist;
for (a = 1; a <= poly; a++) {
pf->nr = a;
pf->min_xy[0] = pf->min_xy[1] = 1.0e20;
pf->max_xy[0] = pf->max_xy[1] = -1.0e20;
pf++;
}
eed = sf_ctx->filledgebase.first;
while (eed) {
pflist[eed->poly_nr - 1].edges++;
eed = eed->next;
}
eve = sf_ctx->fillvertbase.first;
while (eve) {
pflist[eve->poly_nr - 1].verts++;
min_xy_p = pflist[eve->poly_nr - 1].min_xy;
max_xy_p = pflist[eve->poly_nr - 1].max_xy;
min_xy_p[0] = (min_xy_p[0]) < (eve->xy[0]) ? (min_xy_p[0]) : (eve->xy[0]);
min_xy_p[1] = (min_xy_p[1]) < (eve->xy[1]) ? (min_xy_p[1]) : (eve->xy[1]);
max_xy_p[0] = (max_xy_p[0]) > (eve->xy[0]) ? (max_xy_p[0]) : (eve->xy[0]);
max_xy_p[1] = (max_xy_p[1]) > (eve->xy[1]) ? (max_xy_p[1]) : (eve->xy[1]);
if (eve->h > 2) pflist[eve->poly_nr - 1].f = 1;
eve = eve->next;
}
/* STEP 4: FIND HOLES OR BOUNDS, JOIN THEM
* ( bounds just to divide it in pieces for optimization,
* the edgefill itself has good auto-hole detection)
* WATCH IT: ONLY WORKS WITH SORTED POLYS!!! */
if (poly > 1) {
short *polycache, *pc;
/* so, sort first */
qsort(pflist, poly, sizeof(PolyFill), vergpoly);
#if 0
pf = pflist;
for (a = 1; a <= poly; a++) {
printf("poly:%d edges:%d verts:%d flag: %d\n", a, pf->edges, pf->verts, pf->f);
PRINT2(f, f, pf->min[0], pf->min[1]);
pf++;
}
#endif
polycache = pc = MEM_callocN(sizeof(short) * poly, "polycache");
pf = pflist;
for (a = 0; a < poly; a++, pf++) {
for (c = a + 1; c < poly; c++) {
/* if 'a' inside 'c': join (bbox too)
* Careful: 'a' can also be inside another poly.
*/
if (boundisect(pf, pflist + c)) {
*pc = c;
pc++;
}
/* only for optimize! */
/* else if (pf->max_xy[0] < (pflist+c)->min[cox]) break; */
}
while (pc != polycache) {
pc--;
mergepolysSimp(sf_ctx, pf, pflist + *pc);
}
}
MEM_freeN(polycache);
}
#if 0
printf("after merge\n");
pf = pflist;
for (a = 1; a <= poly; a++) {
printf("poly:%d edges:%d verts:%d flag: %d\n", a, pf->edges, pf->verts, pf->f);
pf++;
}
#endif
/* STEP 5: MAKE TRIANGLES */
tempve.first = sf_ctx->fillvertbase.first;
tempve.last = sf_ctx->fillvertbase.last;
temped.first = sf_ctx->filledgebase.first;
temped.last = sf_ctx->filledgebase.last;
sf_ctx->fillvertbase.first = sf_ctx->fillvertbase.last = NULL;
sf_ctx->filledgebase.first = sf_ctx->filledgebase.last = NULL;
pf = pflist;
for (a = 0; a < poly; a++) {
if (pf->edges > 1) {
splitlist(sf_ctx, &tempve, &temped, pf->nr);
totfaces += scanfill(sf_ctx, pf);
}
pf++;
}
BLI_movelisttolist(&sf_ctx->fillvertbase, &tempve);
BLI_movelisttolist(&sf_ctx->filledgebase, &temped);
/* FREE */
MEM_freeN(pflist);
return totfaces;
}
static void scanfill(PolyFill *pf, int mat_nr)
{
ScFillVert *sc = NULL, *sc1;
EditVert *eve,*v1,*v2,*v3;
EditEdge *eed,*nexted,*ed1,*ed2,*ed3;
float miny = 0.0;
int a,b,verts, maxface, totface;
short nr, test, twoconnected=0;
nr= pf->nr;
/* PRINTS
verts= pf->verts;
eve= fillvertbase.first;
while(eve) {
printf("vert: %x co: %f %f\n",eve,eve->co[cox],eve->co[coy]);
eve= eve->next;
}
eed= filledgebase.first;
while(eed) {
printf("edge: %x verts: %x %x\n",eed,eed->v1,eed->v2);
eed= eed->next;
} */
/* STEP 0: remove zero sized edges */
eed= filledgebase.first;
while(eed) {
if(eed->v1->co[cox]==eed->v2->co[cox]) {
if(eed->v1->co[coy]==eed->v2->co[coy]) {
if(eed->v1->f==255 && eed->v2->f!=255) {
eed->v2->f= 255;
eed->v2->tmp.v= eed->v1->tmp.v;
}
else if(eed->v2->f==255 && eed->v1->f!=255) {
eed->v1->f= 255;
eed->v1->tmp.v= eed->v2->tmp.v;
}
else if(eed->v2->f==255 && eed->v1->f==255) {
eed->v1->tmp.v= eed->v2->tmp.v;
}
else {
eed->v2->f= 255;
eed->v2->tmp.v = eed->v1->tmp.v;
}
}
}
eed= eed->next;
}
/* STEP 1: make using FillVert and FillEdge lists a sorted
ScFillVert list
*/
sc= scdata= (ScFillVert *)MEM_callocN(pf->verts*sizeof(ScFillVert),"Scanfill1");
eve= fillvertbase.first;
verts= 0;
while(eve) {
if(eve->xs==nr) {
if(eve->f!= 255) {
verts++;
eve->f= 0; /* flag for connectedges later on */
sc->v1= eve;
sc++;
}
}
eve= eve->next;
}
qsort(scdata, verts, sizeof(ScFillVert), vergscdata);
eed= filledgebase.first;
while(eed) {
nexted= eed->next;
eed->f= 0;
BLI_remlink(&filledgebase,eed);
/* commented all of this out, this I have no idea for what it is for, probably from ancient past */
/* it does crash blender, since it uses mixed original and new vertices (ton) */
// if(eed->v1->f==255) {
// v1= eed->v1;
// while((eed->v1->f == 255) && (eed->v1->tmp.v != v1))
// eed->v1 = eed->v1->tmp.v;
// }
// if(eed->v2->f==255) {
// v2= eed->v2;
// while((eed->v2->f == 255) && (eed->v2->tmp.v != v2))
// eed->v2 = eed->v2->tmp.v;
// }
if(eed->v1!=eed->v2) addedgetoscanlist(eed,verts);
eed= nexted;
}
/*
sc= scdata;
for(a=0;a<verts;a++) {
printf("\nscvert: %x\n",sc->v1);
eed= sc->first;
while(eed) {
printf(" ed %x %x %x\n",eed,eed->v1,eed->v2);
eed= eed->next;
}
sc++;
}*/
/* STEP 2: FILL LOOP */
if(pf->f==0) twoconnected= 1;
/* (temporal) security: never much more faces than vertices */
totface= 0;
maxface= 2*verts; /* 2*verts: based at a filled circle within a triangle */
sc= scdata;
for(a=0;a<verts;a++) {
/* printf("VERTEX %d %x\n",a,sc->v1); */
ed1= sc->first;
while(ed1) { /* set connectflags */
nexted= ed1->next;
if(ed1->v1->h==1 || ed1->v2->h==1) {
BLI_remlink((ListBase *)&(sc->first),ed1);
BLI_addtail(&filledgebase,ed1);
if(ed1->v1->h>1) ed1->v1->h--;
if(ed1->v2->h>1) ed1->v2->h--;
}
else ed1->v2->f= 1;
ed1= nexted;
}
while(sc->first) { /* for as long there are edges */
ed1= sc->first;
ed2= ed1->next;
/* commented out... the ESC here delivers corrupted memory (and doesnt work during grab) */
/* if(callLocalInterruptCallBack()) break; */
if(totface>maxface) {
/* printf("Fill error: endless loop. Escaped at vert %d, tot: %d.\n", a, verts); */
a= verts;
break;
}
if(ed2==0) {
sc->first=sc->last= 0;
/* printf("just 1 edge to vert\n"); */
BLI_addtail(&filledgebase,ed1);
ed1->v2->f= 0;
ed1->v1->h--;
ed1->v2->h--;
} else {
/* test rest of vertices */
v1= ed1->v2;
v2= ed1->v1;
v3= ed2->v2;
/* this happens with a serial of overlapping edges */
if(v1==v2 || v2==v3) break;
/* printf("test verts %x %x %x\n",v1,v2,v3); */
miny = ( (v1->co[coy])<(v3->co[coy]) ? (v1->co[coy]) : (v3->co[coy]) );
/* miny= MIN2(v1->co[coy],v3->co[coy]); */
sc1= sc+1;
test= 0;
for(b=a+1;b<verts;b++) {
if(sc1->v1->f==0) {
if(sc1->v1->co[coy] <= miny) break;
if(testedgeside(v1->co,v2->co,sc1->v1->co))
if(testedgeside(v2->co,v3->co,sc1->v1->co))
if(testedgeside(v3->co,v1->co,sc1->v1->co)) {
/* point in triangle */
test= 1;
break;
}
}
sc1++;
}
if(test) {
/* make new edge, and start over */
/* printf("add new edge %x %x and start again\n",v2,sc1->v1); */
ed3= BLI_addfilledge(v2, sc1->v1);
BLI_remlink(&filledgebase, ed3);
BLI_insertlinkbefore((ListBase *)&(sc->first), ed2, ed3);
ed3->v2->f= 1;
ed3->f= 2;
ed3->v1->h++;
ed3->v2->h++;
}
else {
/* new triangle */
/* printf("add face %x %x %x\n",v1,v2,v3); */
addfillface(v1, v2, v3, mat_nr);
totface++;
BLI_remlink((ListBase *)&(sc->first),ed1);
BLI_addtail(&filledgebase,ed1);
ed1->v2->f= 0;
ed1->v1->h--;
ed1->v2->h--;
/* ed2 can be removed when it's an old one */
if(ed2->f==0 && twoconnected) {
BLI_remlink((ListBase *)&(sc->first),ed2);
BLI_addtail(&filledgebase,ed2);
ed2->v2->f= 0;
ed2->v1->h--;
ed2->v2->h--;
}
/* new edge */
ed3= BLI_addfilledge(v1, v3);
BLI_remlink(&filledgebase, ed3);
ed3->f= 2;
ed3->v1->h++;
ed3->v2->h++;
/* printf("add new edge %x %x\n",v1,v3); */
sc1= addedgetoscanlist(ed3, verts);
if(sc1) { /* ed3 already exists: remove */
/* printf("Edge exists\n"); */
ed3->v1->h--;
ed3->v2->h--;
if(twoconnected) ed3= sc1->first;
else ed3= 0;
while(ed3) {
if( (ed3->v1==v1 && ed3->v2==v3) || (ed3->v1==v3 && ed3->v2==v1) ) {
BLI_remlink((ListBase *)&(sc1->first),ed3);
BLI_addtail(&filledgebase,ed3);
ed3->v1->h--;
ed3->v2->h--;
break;
}
ed3= ed3->next;
}
}
}
}
/* test for loose edges */
ed1= sc->first;
while(ed1) {
nexted= ed1->next;
if(ed1->v1->h<2 || ed1->v2->h<2) {
BLI_remlink((ListBase *)&(sc->first),ed1);
BLI_addtail(&filledgebase,ed1);
if(ed1->v1->h>1) ed1->v1->h--;
if(ed1->v2->h>1) ed1->v2->h--;
}
ed1= nexted;
}
}
sc++;
}
MEM_freeN(scdata);
}
static int scanfill(ScanFillContext *sf_ctx, PolyFill *pf)
{
ScanFillVertLink *sc = NULL, *sc1;
ScanFillVert *eve, *v1, *v2, *v3;
ScanFillEdge *eed, *nexted, *ed1, *ed2, *ed3;
int a, b, verts, maxface, totface;
short nr, test, twoconnected = 0;
nr = pf->nr;
/* PRINTS */
#if 0
verts = pf->verts;
eve = sf_ctx->fillvertbase.first;
while (eve) {
printf("vert: %x co: %f %f\n", eve, eve->xy[0], eve->xy[1]);
eve = eve->next;
}
eed = sf_ctx->filledgebase.first;
while (eed) {
printf("edge: %x verts: %x %x\n", eed, eed->v1, eed->v2);
eed = eed->next;
}
#endif
/* STEP 0: remove zero sized edges */
eed = sf_ctx->filledgebase.first;
while (eed) {
if (equals_v2v2(eed->v1->xy, eed->v2->xy)) {
if (eed->v1->f == SF_VERT_ZERO_LEN && eed->v2->f != SF_VERT_ZERO_LEN) {
eed->v2->f = SF_VERT_ZERO_LEN;
eed->v2->tmp.v = eed->v1->tmp.v;
}
else if (eed->v2->f == SF_VERT_ZERO_LEN && eed->v1->f != SF_VERT_ZERO_LEN) {
eed->v1->f = SF_VERT_ZERO_LEN;
eed->v1->tmp.v = eed->v2->tmp.v;
}
else if (eed->v2->f == SF_VERT_ZERO_LEN && eed->v1->f == SF_VERT_ZERO_LEN) {
eed->v1->tmp.v = eed->v2->tmp.v;
}
else {
eed->v2->f = SF_VERT_ZERO_LEN;
eed->v2->tmp.v = eed->v1;
}
}
eed = eed->next;
}
/* STEP 1: make using FillVert and FillEdge lists a sorted
* ScanFillVertLink list
*/
sc = sf_ctx->_scdata = (ScanFillVertLink *)MEM_callocN(pf->verts * sizeof(ScanFillVertLink), "Scanfill1");
eve = sf_ctx->fillvertbase.first;
verts = 0;
while (eve) {
if (eve->poly_nr == nr) {
if (eve->f != SF_VERT_ZERO_LEN) {
verts++;
eve->f = 0; /* flag for connectedges later on */
sc->v1 = eve;
sc++;
}
}
eve = eve->next;
}
qsort(sf_ctx->_scdata, verts, sizeof(ScanFillVertLink), vergscdata);
eed = sf_ctx->filledgebase.first;
while (eed) {
nexted = eed->next;
BLI_remlink(&sf_ctx->filledgebase, eed);
/* This code is for handling zero-length edges that get
* collapsed in step 0. It was removed for some time to
* fix trunk bug #4544, so if that comes back, this code
* may need some work, or there will have to be a better
* fix to #4544. */
if (eed->v1->f == SF_VERT_ZERO_LEN) {
v1 = eed->v1;
while ((eed->v1->f == SF_VERT_ZERO_LEN) && (eed->v1->tmp.v != v1) && (eed->v1 != eed->v1->tmp.v))
eed->v1 = eed->v1->tmp.v;
}
if (eed->v2->f == SF_VERT_ZERO_LEN) {
v2 = eed->v2;
while ((eed->v2->f == SF_VERT_ZERO_LEN) && (eed->v2->tmp.v != v2) && (eed->v2 != eed->v2->tmp.v))
eed->v2 = eed->v2->tmp.v;
}
if (eed->v1 != eed->v2) addedgetoscanlist(sf_ctx, eed, verts);
eed = nexted;
}
#if 0
sc = scdata;
for (a = 0; a < verts; a++) {
printf("\nscvert: %x\n", sc->v1);
eed = sc->first;
while (eed) {
printf(" ed %x %x %x\n", eed, eed->v1, eed->v2);
eed = eed->next;
}
sc++;
}
#endif
/* STEP 2: FILL LOOP */
if (pf->f == 0) twoconnected = 1;
/* (temporal) security: never much more faces than vertices */
totface = 0;
maxface = 2 * verts; /* 2*verts: based at a filled circle within a triangle */
sc = sf_ctx->_scdata;
for (a = 0; a < verts; a++) {
/* printf("VERTEX %d %x\n",a,sc->v1); */
ed1 = sc->first;
while (ed1) { /* set connectflags */
nexted = ed1->next;
if (ed1->v1->h == 1 || ed1->v2->h == 1) {
BLI_remlink((ListBase *)&(sc->first), ed1);
BLI_addtail(&sf_ctx->filledgebase, ed1);
if (ed1->v1->h > 1) ed1->v1->h--;
if (ed1->v2->h > 1) ed1->v2->h--;
}
else ed1->v2->f = SF_VERT_UNKNOWN;
ed1 = nexted;
}
while (sc->first) { /* for as long there are edges */
ed1 = sc->first;
ed2 = ed1->next;
/* commented out... the ESC here delivers corrupted memory (and doesnt work during grab) */
/* if (callLocalInterruptCallBack()) break; */
if (totface > maxface) {
/* printf("Fill error: endless loop. Escaped at vert %d, tot: %d.\n", a, verts); */
a = verts;
break;
}
if (ed2 == 0) {
sc->first = sc->last = NULL;
/* printf("just 1 edge to vert\n"); */
BLI_addtail(&sf_ctx->filledgebase, ed1);
ed1->v2->f = 0;
ed1->v1->h--;
ed1->v2->h--;
}
else {
/* test rest of vertices */
float miny;
v1 = ed1->v2;
v2 = ed1->v1;
v3 = ed2->v2;
/* this happens with a serial of overlapping edges */
if (v1 == v2 || v2 == v3) break;
/* printf("test verts %x %x %x\n",v1,v2,v3); */
miny = minf(v1->xy[1], v3->xy[1]);
/* miny= MIN2(v1->xy[1],v3->xy[1]); */
sc1 = sc + 1;
test = 0;
for (b = a + 1; b < verts; b++) {
if (sc1->v1->f == 0) {
if (sc1->v1->xy[1] <= miny) break;
if (testedgeside(v1->xy, v2->xy, sc1->v1->xy))
if (testedgeside(v2->xy, v3->xy, sc1->v1->xy))
if (testedgeside(v3->xy, v1->xy, sc1->v1->xy)) {
/* point in triangle */
test = 1;
break;
}
}
sc1++;
}
if (test) {
/* make new edge, and start over */
/* printf("add new edge %x %x and start again\n",v2,sc1->v1); */
ed3 = BLI_addfilledge(sf_ctx, v2, sc1->v1);
BLI_remlink(&sf_ctx->filledgebase, ed3);
BLI_insertlinkbefore((ListBase *)&(sc->first), ed2, ed3);
ed3->v2->f = SF_VERT_UNKNOWN;
ed3->f = SF_EDGE_UNKNOWN;
ed3->v1->h++;
ed3->v2->h++;
}
else {
/* new triangle */
/* printf("add face %x %x %x\n",v1,v2,v3); */
addfillface(sf_ctx, v1, v2, v3);
totface++;
BLI_remlink((ListBase *)&(sc->first), ed1);
BLI_addtail(&sf_ctx->filledgebase, ed1);
ed1->v2->f = 0;
ed1->v1->h--;
ed1->v2->h--;
/* ed2 can be removed when it's a boundary edge */
if ((ed2->f == 0 && twoconnected) || (ed2->f == SF_EDGE_BOUNDARY)) {
BLI_remlink((ListBase *)&(sc->first), ed2);
BLI_addtail(&sf_ctx->filledgebase, ed2);
ed2->v2->f = 0;
ed2->v1->h--;
ed2->v2->h--;
}
/* new edge */
ed3 = BLI_addfilledge(sf_ctx, v1, v3);
BLI_remlink(&sf_ctx->filledgebase, ed3);
ed3->f = SF_EDGE_UNKNOWN;
ed3->v1->h++;
ed3->v2->h++;
/* printf("add new edge %x %x\n",v1,v3); */
sc1 = addedgetoscanlist(sf_ctx, ed3, verts);
if (sc1) { /* ed3 already exists: remove if a boundary */
/* printf("Edge exists\n"); */
ed3->v1->h--;
ed3->v2->h--;
ed3 = sc1->first;
while (ed3) {
if ( (ed3->v1 == v1 && ed3->v2 == v3) || (ed3->v1 == v3 && ed3->v2 == v1) ) {
if (twoconnected || ed3->f == SF_EDGE_BOUNDARY) {
BLI_remlink((ListBase *)&(sc1->first), ed3);
BLI_addtail(&sf_ctx->filledgebase, ed3);
ed3->v1->h--;
ed3->v2->h--;
}
break;
}
ed3 = ed3->next;
}
}
}
}
/* test for loose edges */
ed1 = sc->first;
while (ed1) {
nexted = ed1->next;
if (ed1->v1->h < 2 || ed1->v2->h < 2) {
BLI_remlink((ListBase *)&(sc->first), ed1);
BLI_addtail(&sf_ctx->filledgebase, ed1);
if (ed1->v1->h > 1) ed1->v1->h--;
if (ed1->v2->h > 1) ed1->v2->h--;
}
ed1 = nexted;
}
}
sc++;
}
MEM_freeN(sf_ctx->_scdata);
sf_ctx->_scdata = NULL;
return totface;
}