forked from bartvdbraak/blender
loopwalker support for selecting the sides of ngons
see: wiki.blender.org/uploads/d/dc/BMesh_NGon_Loop_Select.png
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@ -385,22 +385,42 @@ static void bmw_LoopWalker_begin(BMWalker *walker, void *data)
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BMwLoopWalker *lwalk = NULL, owalk;
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BMEdge *e = data;
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BMVert *v;
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/* int found = 1, val; */ /* UNUSED */
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int vert_edge_count[2] = {BM_vert_edge_count_nonwire(e->v1),
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BM_vert_edge_count_nonwire(e->v2)};
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v = e->v1;
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/* val = BM_vert_edge_count(v); */ /* UNUSED */
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lwalk = BMW_state_add(walker);
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BLI_ghash_insert(walker->visithash, e, NULL);
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lwalk->cur = lwalk->start = e;
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lwalk->lastv = lwalk->startv = v;
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lwalk->is_boundry = BM_edge_is_boundary(e);
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lwalk->is_single = (BM_vert_edge_count_nonwire(e->v1) == 2 &&
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BM_vert_edge_count_nonwire(e->v2) == 2);
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lwalk->is_single = (vert_edge_count[0] == 2 && vert_edge_count[1] == 2);
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/* rewin */
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/* could also check that vertex*/
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if ((lwalk->is_boundry == FALSE) &&
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(vert_edge_count[0] == 3 || vert_edge_count[1] == 3))
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{
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BMIter iter;
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BMFace *f_iter;
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BMFace *f_best = NULL;
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BM_ITER(f_iter, &iter, walker->bm, BM_FACES_OF_EDGE, e) {
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if (f_best == NULL || f_best->len < f_iter->len) {
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f_best = f_iter;
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}
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}
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/* only use hub selection for 5+ sides else this could
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* conflict with normal edge loop selection. */
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lwalk->f_hub = f_best->len > 4 ? f_best : NULL;
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}
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else {
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lwalk->f_hub = NULL;
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}
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/* rewind */
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while (BMW_current_state(walker)) {
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owalk = *((BMwLoopWalker *)BMW_current_state(walker));
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BMW_walk(walker);
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@ -436,27 +456,29 @@ static void *bmw_LoopWalker_step(BMWalker *walker)
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l = e->l;
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if (!l) { /* WIRE EDGE */
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BMIter eiter;
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if (owalk.f_hub) { /* NGON EDGE */
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int vert_edge_tot;
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/* match trunk: mark all connected wire edges */
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for (i = 0; i < 2; i++) {
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v = i ? e->v2 : e->v1;
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v = BM_edge_other_vert(e, lwalk->lastv);
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vert_edge_tot = BM_vert_edge_count_nonwire(v);
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if (vert_edge_tot == 3) {
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l = BM_face_other_vert_loop(owalk.f_hub, lwalk->lastv, v);
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nexte = BM_edge_exists(v, l->v);
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BM_ITER(nexte, &eiter, walker->bm, BM_EDGES_OF_VERT, v) {
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if ((nexte->l == NULL) && !BLI_ghash_haskey(walker->visithash, nexte)) {
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lwalk = BMW_state_add(walker);
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lwalk->cur = nexte;
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lwalk->lastv = v;
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lwalk->is_boundry = owalk.is_boundry;
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lwalk->is_single = owalk.is_single;
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lwalk->f_hub = owalk.f_hub;
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BLI_ghash_insert(walker->visithash, nexte, NULL);
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}
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}
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}
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}
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else { /* FACE EDGE */
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else if (l) { /* NORMAL EDGE WITH FACES */
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int vert_edge_tot;
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int stopi;
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@ -510,13 +532,38 @@ static void *bmw_LoopWalker_step(BMWalker *walker)
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lwalk = BMW_state_add(walker);
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lwalk->cur = l->e;
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lwalk->lastv = v;
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lwalk->is_boundry = owalk.is_boundry;
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lwalk->is_single = owalk.is_single;
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lwalk->f_hub = owalk.f_hub;
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BLI_ghash_insert(walker->visithash, l->e, NULL);
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}
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}
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}
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}
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else { /* WIRE EDGE */
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BMIter eiter;
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/* match trunk: mark all connected wire edges */
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for (i = 0; i < 2; i++) {
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v = i ? e->v2 : e->v1;
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BM_ITER(nexte, &eiter, walker->bm, BM_EDGES_OF_VERT, v) {
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if ((nexte->l == NULL) && !BLI_ghash_haskey(walker->visithash, nexte)) {
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lwalk = BMW_state_add(walker);
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lwalk->cur = nexte;
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lwalk->lastv = v;
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lwalk->is_boundry = owalk.is_boundry;
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lwalk->is_single = owalk.is_single;
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lwalk->f_hub = owalk.f_hub;
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BLI_ghash_insert(walker->visithash, nexte, NULL);
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}
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}
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}
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}
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return owalk.cur;
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}
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@ -61,6 +61,7 @@ typedef struct BMwLoopWalker {
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BMwGenericWalker header;
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BMEdge *cur, *start;
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BMVert *lastv, *startv;
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BMFace *f_hub;
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short is_boundry; /* boundry looping changes behavior */
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short is_single; /* single means the edge verts are only connected to 1 face */
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} BMwLoopWalker;
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