Exemple #1
0
/**
 * \brief Mesh -> BMesh
 *
 * \warning This function doesn't calculate face normals.
 */
void BM_mesh_bm_from_me(BMesh *bm, Mesh *me,
                        const bool calc_face_normal, const bool set_key, int act_key_nr)
{
	MVert *mvert;
	MEdge *medge;
	MLoop *mloop;
	MPoly *mp;
	KeyBlock *actkey, *block;
	BMVert *v, **vtable = NULL;
	BMEdge *e, **etable = NULL;
	BMFace *f;
	float (*keyco)[3] = NULL;
	int *keyi;
	int totuv, i, j;

	int cd_vert_bweight_offset;
	int cd_edge_bweight_offset;
	int cd_edge_crease_offset;

	/* free custom data */
	/* this isnt needed in most cases but do just incase */
	CustomData_free(&bm->vdata, bm->totvert);
	CustomData_free(&bm->edata, bm->totedge);
	CustomData_free(&bm->ldata, bm->totloop);
	CustomData_free(&bm->pdata, bm->totface);

	if (!me || !me->totvert) {
		if (me) { /*no verts? still copy customdata layout*/
			CustomData_copy(&me->vdata, &bm->vdata, CD_MASK_BMESH, CD_ASSIGN, 0);
			CustomData_copy(&me->edata, &bm->edata, CD_MASK_BMESH, CD_ASSIGN, 0);
			CustomData_copy(&me->ldata, &bm->ldata, CD_MASK_BMESH, CD_ASSIGN, 0);
			CustomData_copy(&me->pdata, &bm->pdata, CD_MASK_BMESH, CD_ASSIGN, 0);

			CustomData_bmesh_init_pool(&bm->vdata, me->totvert, BM_VERT);
			CustomData_bmesh_init_pool(&bm->edata, me->totedge, BM_EDGE);
			CustomData_bmesh_init_pool(&bm->ldata, me->totloop, BM_LOOP);
			CustomData_bmesh_init_pool(&bm->pdata, me->totpoly, BM_FACE);
		}
		return; /* sanity check */
	}

	vtable = MEM_mallocN(sizeof(void **) * me->totvert, "mesh to bmesh vtable");

	CustomData_copy(&me->vdata, &bm->vdata, CD_MASK_BMESH, CD_CALLOC, 0);
	CustomData_copy(&me->edata, &bm->edata, CD_MASK_BMESH, CD_CALLOC, 0);
	CustomData_copy(&me->ldata, &bm->ldata, CD_MASK_BMESH, CD_CALLOC, 0);
	CustomData_copy(&me->pdata, &bm->pdata, CD_MASK_BMESH, CD_CALLOC, 0);

	/* make sure uv layer names are consisten */
	totuv = CustomData_number_of_layers(&bm->pdata, CD_MTEXPOLY);
	for (i = 0; i < totuv; i++) {
		int li = CustomData_get_layer_index_n(&bm->pdata, CD_MTEXPOLY, i);
		CustomData_set_layer_name(&bm->ldata, CD_MLOOPUV, i, bm->pdata.layers[li].name);
	}

	if ((act_key_nr != 0) && (me->key != NULL)) {
		actkey = BLI_findlink(&me->key->block, act_key_nr - 1);
	}
	else {
		actkey = NULL;
	}

	if (me->key) {
		CustomData_add_layer(&bm->vdata, CD_SHAPE_KEYINDEX, CD_ASSIGN, NULL, 0);

		/* check if we need to generate unique ids for the shapekeys.
		 * this also exists in the file reading code, but is here for
		 * a sanity check */
		if (!me->key->uidgen) {
			fprintf(stderr,
			        "%s had to generate shape key uid's in a situation we shouldn't need to! "
			        "(bmesh internal error)\n",
			        __func__);

			me->key->uidgen = 1;
			for (block = me->key->block.first; block; block = block->next) {
				block->uid = me->key->uidgen++;
			}
		}

		if (actkey && actkey->totelem == me->totvert) {
			keyco = actkey->data;
			bm->shapenr = act_key_nr;
		}

		for (i = 0, block = me->key->block.first; block; block = block->next, i++) {
			CustomData_add_layer_named(&bm->vdata, CD_SHAPEKEY,
			                           CD_ASSIGN, NULL, 0, block->name);

			j = CustomData_get_layer_index_n(&bm->vdata, CD_SHAPEKEY, i);
			bm->vdata.layers[j].uid = block->uid;
		}
	}

	CustomData_bmesh_init_pool(&bm->vdata, me->totvert, BM_VERT);
	CustomData_bmesh_init_pool(&bm->edata, me->totedge, BM_EDGE);
	CustomData_bmesh_init_pool(&bm->ldata, me->totloop, BM_LOOP);
	CustomData_bmesh_init_pool(&bm->pdata, me->totpoly, BM_FACE);

	BM_mesh_cd_flag_apply(bm, me->cd_flag);

	cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
	cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT);
	cd_edge_crease_offset  = CustomData_get_offset(&bm->edata, CD_CREASE);

	for (i = 0, mvert = me->mvert; i < me->totvert; i++, mvert++) {
		v = vtable[i] = BM_vert_create(bm, keyco && set_key ? keyco[i] : mvert->co, NULL, BM_CREATE_SKIP_CD);
		BM_elem_index_set(v, i); /* set_ok */

		/* transfer flag */
		v->head.hflag = BM_vert_flag_from_mflag(mvert->flag & ~SELECT);

		/* this is necessary for selection counts to work properly */
		if (mvert->flag & SELECT) {
			BM_vert_select_set(bm, v, true);
		}

		normal_short_to_float_v3(v->no, mvert->no);

		/* Copy Custom Data */
		CustomData_to_bmesh_block(&me->vdata, &bm->vdata, i, &v->head.data, true);

		if (cd_vert_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(v, cd_vert_bweight_offset, (float)mvert->bweight / 255.0f);

		/* set shapekey data */
		if (me->key) {
			/* set shape key original index */
			keyi = CustomData_bmesh_get(&bm->vdata, v->head.data, CD_SHAPE_KEYINDEX);
			if (keyi) {
				*keyi = i;
			}

			for (block = me->key->block.first, j = 0; block; block = block->next, j++) {
				float *co = CustomData_bmesh_get_n(&bm->vdata, v->head.data, CD_SHAPEKEY, j);

				if (co) {
					copy_v3_v3(co, ((float *)block->data) + 3 * i);
				}
			}
		}
	}

	bm->elem_index_dirty &= ~BM_VERT; /* added in order, clear dirty flag */

	if (!me->totedge) {
		MEM_freeN(vtable);
		return;
	}

	etable = MEM_mallocN(sizeof(void **) * me->totedge, "mesh to bmesh etable");

	medge = me->medge;
	for (i = 0; i < me->totedge; i++, medge++) {
		e = etable[i] = BM_edge_create(bm, vtable[medge->v1], vtable[medge->v2], NULL, BM_CREATE_SKIP_CD);
		BM_elem_index_set(e, i); /* set_ok */

		/* transfer flags */
		e->head.hflag = BM_edge_flag_from_mflag(medge->flag & ~SELECT);

		/* this is necessary for selection counts to work properly */
		if (medge->flag & SELECT) {
			BM_edge_select_set(bm, e, true);
		}

		/* Copy Custom Data */
		CustomData_to_bmesh_block(&me->edata, &bm->edata, i, &e->head.data, true);

		if (cd_edge_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_bweight_offset, (float)medge->bweight / 255.0f);
		if (cd_edge_crease_offset  != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_crease_offset,  (float)medge->crease  / 255.0f);

	}

	bm->elem_index_dirty &= ~BM_EDGE; /* added in order, clear dirty flag */

	mloop = me->mloop;
	mp = me->mpoly;
	for (i = 0; i < me->totpoly; i++, mp++) {
		BMLoop *l_iter;
		BMLoop *l_first;

		f = bm_face_create_from_mpoly(mp, mloop + mp->loopstart,
		                              bm, vtable, etable);

		if (UNLIKELY(f == NULL)) {
			printf("%s: Warning! Bad face in mesh"
			       " \"%s\" at index %d!, skipping\n",
			       __func__, me->id.name + 2, i);
			continue;
		}

		/* don't use 'i' since we may have skipped the face */
		BM_elem_index_set(f, bm->totface - 1); /* set_ok */

		/* transfer flag */
		f->head.hflag = BM_face_flag_from_mflag(mp->flag & ~ME_FACE_SEL);

		/* this is necessary for selection counts to work properly */
		if (mp->flag & ME_FACE_SEL) {
			BM_face_select_set(bm, f, true);
		}

		f->mat_nr = mp->mat_nr;
		if (i == me->act_face) bm->act_face = f;

		j = mp->loopstart;
		l_iter = l_first = BM_FACE_FIRST_LOOP(f);
		do {
			/* Save index of correspsonding MLoop */
			CustomData_to_bmesh_block(&me->ldata, &bm->ldata, j++, &l_iter->head.data, true);
		} while ((l_iter = l_iter->next) != l_first);

		/* Copy Custom Data */
		CustomData_to_bmesh_block(&me->pdata, &bm->pdata, i, &f->head.data, true);

		if (calc_face_normal) {
			BM_face_normal_update(f);
		}
	}

	bm->elem_index_dirty &= ~BM_FACE; /* added in order, clear dirty flag */

	if (me->mselect && me->totselect != 0) {

		BMVert **vert_array = MEM_mallocN(sizeof(BMVert *) * bm->totvert, "VSelConv");
		BMEdge **edge_array = MEM_mallocN(sizeof(BMEdge *) * bm->totedge, "ESelConv");
		BMFace **face_array = MEM_mallocN(sizeof(BMFace *) * bm->totface, "FSelConv");
		MSelect *msel;

#pragma omp parallel sections if (bm->totvert + bm->totedge + bm->totface >= BM_OMP_LIMIT)
		{
#pragma omp section
			{ BM_iter_as_array(bm, BM_VERTS_OF_MESH, NULL, (void **)vert_array, bm->totvert); }
#pragma omp section
			{ BM_iter_as_array(bm, BM_EDGES_OF_MESH, NULL, (void **)edge_array, bm->totedge); }
#pragma omp section
			{ BM_iter_as_array(bm, BM_FACES_OF_MESH, NULL, (void **)face_array, bm->totface); }
		}

		for (i = 0, msel = me->mselect; i < me->totselect; i++, msel++) {
			switch (msel->type) {
				case ME_VSEL:
					BM_select_history_store(bm, (BMElem *)vert_array[msel->index]);
					break;
				case ME_ESEL:
					BM_select_history_store(bm, (BMElem *)edge_array[msel->index]);
					break;
				case ME_FSEL:
					BM_select_history_store(bm, (BMElem *)face_array[msel->index]);
					break;
			}
		}

		MEM_freeN(vert_array);
		MEM_freeN(edge_array);
		MEM_freeN(face_array);
	}
	else {
		me->totselect = 0;
		if (me->mselect) {
			MEM_freeN(me->mselect);
			me->mselect = NULL;
		}
	}

	MEM_freeN(vtable);
	MEM_freeN(etable);
}
/**
 * \brief Mesh -> BMesh
 * \param bm: The mesh to write into, while this is typically a newly created BMesh,
 * merging into existing data is supported.
 * Note the custom-data layout isn't used.
 * If more comprehensive merging is needed we should move this into a separate function
 * since this should be kept fast for edit-mode switching and storing undo steps.
 *
 * \warning This function doesn't calculate face normals.
 */
void BM_mesh_bm_from_me(
        BMesh *bm, Mesh *me,
        const struct BMeshFromMeshParams *params)
{
	const bool is_new =
	        !(bm->totvert ||
	          (bm->vdata.totlayer || bm->edata.totlayer || bm->pdata.totlayer || bm->ldata.totlayer));
	MVert *mvert;
	MEdge *medge;
	MLoop *mloop;
	MPoly *mp;
	KeyBlock *actkey, *block;
	BMVert *v, **vtable = NULL;
	BMEdge *e, **etable = NULL;
	BMFace *f, **ftable = NULL;
	float (*keyco)[3] = NULL;
	int totuv, totloops, i;

	if (!me || !me->totvert) {
		if (me && is_new) { /*no verts? still copy customdata layout*/
			CustomData_copy(&me->vdata, &bm->vdata, CD_MASK_BMESH, CD_ASSIGN, 0);
			CustomData_copy(&me->edata, &bm->edata, CD_MASK_BMESH, CD_ASSIGN, 0);
			CustomData_copy(&me->ldata, &bm->ldata, CD_MASK_BMESH, CD_ASSIGN, 0);
			CustomData_copy(&me->pdata, &bm->pdata, CD_MASK_BMESH, CD_ASSIGN, 0);

			CustomData_bmesh_init_pool(&bm->vdata, me->totvert, BM_VERT);
			CustomData_bmesh_init_pool(&bm->edata, me->totedge, BM_EDGE);
			CustomData_bmesh_init_pool(&bm->ldata, me->totloop, BM_LOOP);
			CustomData_bmesh_init_pool(&bm->pdata, me->totpoly, BM_FACE);
		}
		return; /* sanity check */
	}

	if (is_new) {
		CustomData_copy(&me->vdata, &bm->vdata, CD_MASK_BMESH, CD_CALLOC, 0);
		CustomData_copy(&me->edata, &bm->edata, CD_MASK_BMESH, CD_CALLOC, 0);
		CustomData_copy(&me->ldata, &bm->ldata, CD_MASK_BMESH, CD_CALLOC, 0);
		CustomData_copy(&me->pdata, &bm->pdata, CD_MASK_BMESH, CD_CALLOC, 0);

		/* make sure uv layer names are consisten */
		totuv = CustomData_number_of_layers(&bm->pdata, CD_MTEXPOLY);
		for (i = 0; i < totuv; i++) {
			int li = CustomData_get_layer_index_n(&bm->pdata, CD_MTEXPOLY, i);
			CustomData_set_layer_name(&bm->ldata, CD_MLOOPUV, i, bm->pdata.layers[li].name);
		}
	}

	/* -------------------------------------------------------------------- */
	/* Shape Key */
	int tot_shape_keys = me->key ? BLI_listbase_count(&me->key->block) : 0;
	if (is_new == false) {
		tot_shape_keys = min_ii(tot_shape_keys, CustomData_number_of_layers(&bm->vdata, CD_SHAPEKEY));
	}
	const float (**shape_key_table)[3] = tot_shape_keys ? BLI_array_alloca(shape_key_table, tot_shape_keys) : NULL;

	if ((params->active_shapekey != 0) && (me->key != NULL)) {
		actkey = BLI_findlink(&me->key->block, params->active_shapekey - 1);
	}
	else {
		actkey = NULL;
	}

	if (is_new) {
		if (tot_shape_keys || params->add_key_index) {
			CustomData_add_layer(&bm->vdata, CD_SHAPE_KEYINDEX, CD_ASSIGN, NULL, 0);
		}
	}

	if (tot_shape_keys) {
		if (is_new) {
			/* check if we need to generate unique ids for the shapekeys.
			 * this also exists in the file reading code, but is here for
			 * a sanity check */
			if (!me->key->uidgen) {
				fprintf(stderr,
				        "%s had to generate shape key uid's in a situation we shouldn't need to! "
				        "(bmesh internal error)\n",
				        __func__);

				me->key->uidgen = 1;
				for (block = me->key->block.first; block; block = block->next) {
					block->uid = me->key->uidgen++;
				}
			}
		}

		if (actkey && actkey->totelem == me->totvert) {
			keyco = params->use_shapekey ? actkey->data : NULL;
			if (is_new) {
				bm->shapenr = params->active_shapekey;
			}
		}

		for (i = 0, block = me->key->block.first; i < tot_shape_keys; block = block->next, i++) {
			if (is_new) {
				CustomData_add_layer_named(&bm->vdata, CD_SHAPEKEY,
				                           CD_ASSIGN, NULL, 0, block->name);
				int j = CustomData_get_layer_index_n(&bm->vdata, CD_SHAPEKEY, i);
				bm->vdata.layers[j].uid = block->uid;
			}
			shape_key_table[i] = (const float (*)[3])block->data;
		}
	}

	if (is_new) {
		CustomData_bmesh_init_pool(&bm->vdata, me->totvert, BM_VERT);
		CustomData_bmesh_init_pool(&bm->edata, me->totedge, BM_EDGE);
		CustomData_bmesh_init_pool(&bm->ldata, me->totloop, BM_LOOP);
		CustomData_bmesh_init_pool(&bm->pdata, me->totpoly, BM_FACE);

		BM_mesh_cd_flag_apply(bm, me->cd_flag);
	}

	const int cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
	const int cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT);
	const int cd_edge_crease_offset  = CustomData_get_offset(&bm->edata, CD_CREASE);
	const int cd_shape_key_offset = me->key ? CustomData_get_offset(&bm->vdata, CD_SHAPEKEY) : -1;
	const int cd_shape_keyindex_offset = is_new && (tot_shape_keys || params->add_key_index) ?
	          CustomData_get_offset(&bm->vdata, CD_SHAPE_KEYINDEX) : -1;

	vtable = MEM_mallocN(sizeof(BMVert **) * me->totvert, __func__);

	for (i = 0, mvert = me->mvert; i < me->totvert; i++, mvert++) {
		v = vtable[i] = BM_vert_create(bm, keyco ? keyco[i] : mvert->co, NULL, BM_CREATE_SKIP_CD);
		BM_elem_index_set(v, i); /* set_ok */

		/* transfer flag */
		v->head.hflag = BM_vert_flag_from_mflag(mvert->flag & ~SELECT);

		/* this is necessary for selection counts to work properly */
		if (mvert->flag & SELECT) {
			BM_vert_select_set(bm, v, true);
		}

		normal_short_to_float_v3(v->no, mvert->no);

		/* Copy Custom Data */
		CustomData_to_bmesh_block(&me->vdata, &bm->vdata, i, &v->head.data, true);

		if (cd_vert_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(v, cd_vert_bweight_offset, (float)mvert->bweight / 255.0f);

		/* set shape key original index */
		if (cd_shape_keyindex_offset != -1) BM_ELEM_CD_SET_INT(v, cd_shape_keyindex_offset, i);

		/* set shapekey data */
		if (tot_shape_keys) {
			float (*co_dst)[3] = BM_ELEM_CD_GET_VOID_P(v, cd_shape_key_offset);
			for (int j = 0; j < tot_shape_keys; j++, co_dst++) {
				copy_v3_v3(*co_dst, shape_key_table[j][i]);
			}
		}
	}
	if (is_new) {
		bm->elem_index_dirty &= ~BM_VERT; /* added in order, clear dirty flag */
	}

	etable = MEM_mallocN(sizeof(BMEdge **) * me->totedge, __func__);

	medge = me->medge;
	for (i = 0; i < me->totedge; i++, medge++) {
		e = etable[i] = BM_edge_create(bm, vtable[medge->v1], vtable[medge->v2], NULL, BM_CREATE_SKIP_CD);
		BM_elem_index_set(e, i); /* set_ok */

		/* transfer flags */
		e->head.hflag = BM_edge_flag_from_mflag(medge->flag & ~SELECT);

		/* this is necessary for selection counts to work properly */
		if (medge->flag & SELECT) {
			BM_edge_select_set(bm, e, true);
		}

		/* Copy Custom Data */
		CustomData_to_bmesh_block(&me->edata, &bm->edata, i, &e->head.data, true);

		if (cd_edge_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_bweight_offset, (float)medge->bweight / 255.0f);
		if (cd_edge_crease_offset  != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_crease_offset,  (float)medge->crease  / 255.0f);

	}
	if (is_new) {
		bm->elem_index_dirty &= ~BM_EDGE; /* added in order, clear dirty flag */
	}

	/* only needed for selection. */
	if (me->mselect && me->totselect != 0) {
		ftable = MEM_mallocN(sizeof(BMFace **) * me->totpoly, __func__);
	}

	mloop = me->mloop;
	mp = me->mpoly;
	for (i = 0, totloops = 0; i < me->totpoly; i++, mp++) {
		BMLoop *l_iter;
		BMLoop *l_first;

		f = bm_face_create_from_mpoly(mp, mloop + mp->loopstart,
		                              bm, vtable, etable);
		if (ftable != NULL) {
			ftable[i] = f;
		}

		if (UNLIKELY(f == NULL)) {
			printf("%s: Warning! Bad face in mesh"
			       " \"%s\" at index %d!, skipping\n",
			       __func__, me->id.name + 2, i);
			continue;
		}

		/* don't use 'i' since we may have skipped the face */
		BM_elem_index_set(f, bm->totface - 1); /* set_ok */

		/* transfer flag */
		f->head.hflag = BM_face_flag_from_mflag(mp->flag & ~ME_FACE_SEL);

		/* this is necessary for selection counts to work properly */
		if (mp->flag & ME_FACE_SEL) {
			BM_face_select_set(bm, f, true);
		}

		f->mat_nr = mp->mat_nr;
		if (i == me->act_face) bm->act_face = f;

		int j = mp->loopstart;
		l_iter = l_first = BM_FACE_FIRST_LOOP(f);
		do {
			/* don't use 'j' since we may have skipped some faces, hence some loops. */
			BM_elem_index_set(l_iter, totloops++); /* set_ok */

			/* Save index of correspsonding MLoop */
			CustomData_to_bmesh_block(&me->ldata, &bm->ldata, j++, &l_iter->head.data, true);
		} while ((l_iter = l_iter->next) != l_first);

		/* Copy Custom Data */
		CustomData_to_bmesh_block(&me->pdata, &bm->pdata, i, &f->head.data, true);

		if (params->calc_face_normal) {
			BM_face_normal_update(f);
		}
	}
	if (is_new) {
		bm->elem_index_dirty &= ~(BM_FACE | BM_LOOP); /* added in order, clear dirty flag */
	}

	/* -------------------------------------------------------------------- */
	/* MSelect clears the array elements (avoid adding multiple times).
	 *
	 * Take care to keep this last and not use (v/e/ftable) after this.
	 */

	if (me->mselect && me->totselect != 0) {
		MSelect *msel;
		for (i = 0, msel = me->mselect; i < me->totselect; i++, msel++) {
			BMElem **ele_p;
			switch (msel->type) {
				case ME_VSEL:
					ele_p = (BMElem **)&vtable[msel->index];
					break;
				case ME_ESEL:
					ele_p = (BMElem **)&etable[msel->index];
					break;
				case ME_FSEL:
					ele_p = (BMElem **)&ftable[msel->index];
					break;
				default:
					continue;
			}

			if (*ele_p != NULL) {
				BM_select_history_store_notest(bm, *ele_p);
				*ele_p = NULL;
			}
		}
	}
	else {
		BM_select_history_clear(bm);
	}

	MEM_freeN(vtable);
	MEM_freeN(etable);
	if (ftable) {
		MEM_freeN(ftable);
	}
}
Exemple #3
0
/**
 * The main function for copying DerivedMesh data into BMesh.
 *
 * \note The mesh may already have geometry. see 'is_init'
 */
void DM_to_bmesh_ex(DerivedMesh *dm, BMesh *bm, const bool calc_face_normal)
{
	MVert *mv, *mvert;
	MEdge *me, *medge;
	MPoly /* *mpoly, */ /* UNUSED */ *mp;
	MLoop *mloop;
	BMVert *v, **vtable;
	BMEdge *e, **etable;
	float (*face_normals)[3];
	BMFace *f;
	int i, j, totvert, totedge /* , totface */ /* UNUSED */ ;
	bool is_init = (bm->totvert == 0) && (bm->totedge == 0) && (bm->totface == 0);
	bool is_cddm = (dm->type == DM_TYPE_CDDM);  /* duplicate the arrays for non cddm */
	char has_orig_hflag = 0;

	int cd_vert_bweight_offset;
	int cd_edge_bweight_offset;
	int cd_edge_crease_offset;

	if (is_init == FALSE) {
		/* check if we have an origflag */
		has_orig_hflag |= CustomData_has_layer(&bm->vdata, CD_ORIGINDEX) ? BM_VERT : 0;
		has_orig_hflag |= CustomData_has_layer(&bm->edata, CD_ORIGINDEX) ? BM_EDGE : 0;
		has_orig_hflag |= CustomData_has_layer(&bm->pdata, CD_ORIGINDEX) ? BM_FACE : 0;
	}

	/*merge custom data layout*/
	CustomData_bmesh_merge(&dm->vertData, &bm->vdata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_VERT);
	CustomData_bmesh_merge(&dm->edgeData, &bm->edata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_EDGE);
	CustomData_bmesh_merge(&dm->loopData, &bm->ldata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_LOOP);
	CustomData_bmesh_merge(&dm->polyData, &bm->pdata, CD_MASK_DERIVEDMESH, CD_CALLOC, bm, BM_FACE);

	if (is_init) {
		BM_mesh_cd_flag_apply(bm, dm->cd_flag);
	}

	cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
	cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT);
	cd_edge_crease_offset  = CustomData_get_offset(&bm->edata, CD_CREASE);

	totvert = dm->getNumVerts(dm);
	totedge = dm->getNumEdges(dm);
	/* totface = dm->getNumPolys(dm); */ /* UNUSED */

	vtable = MEM_callocN(sizeof(void **) * totvert, __func__);
	etable = MEM_callocN(sizeof(void **) * totedge, __func__);

	/*do verts*/
	mv = mvert = is_cddm ? dm->getVertArray(dm) : dm->dupVertArray(dm);
	for (i = 0; i < totvert; i++, mv++) {
		v = BM_vert_create(bm, mv->co, NULL, BM_CREATE_SKIP_CD);
		normal_short_to_float_v3(v->no, mv->no);
		v->head.hflag = BM_vert_flag_from_mflag(mv->flag);
		BM_elem_index_set(v, i); /* set_inline */

		CustomData_to_bmesh_block(&dm->vertData, &bm->vdata, i, &v->head.data, true);
		vtable[i] = v;

		/* add bevel weight */
		if (cd_vert_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(v, cd_vert_bweight_offset, (float)mv->bweight / 255.0f);

		if (UNLIKELY(has_orig_hflag & BM_VERT)) {
			int *orig_index = CustomData_bmesh_get(&bm->vdata, v->head.data, CD_ORIGINDEX);
			*orig_index = ORIGINDEX_NONE;
		}
	}
	if (!is_cddm) MEM_freeN(mvert);
	if (is_init) bm->elem_index_dirty &= ~BM_VERT;

	/*do edges*/
	me = medge = is_cddm ? dm->getEdgeArray(dm) : dm->dupEdgeArray(dm);
	for (i = 0; i < totedge; i++, me++) {
		//BLI_assert(BM_edge_exists(vtable[me->v1], vtable[me->v2]) == NULL);
		e = BM_edge_create(bm, vtable[me->v1], vtable[me->v2], NULL, BM_CREATE_SKIP_CD);

		e->head.hflag = BM_edge_flag_from_mflag(me->flag);
		BM_elem_index_set(e, i); /* set_inline */

		CustomData_to_bmesh_block(&dm->edgeData, &bm->edata, i, &e->head.data, true);
		etable[i] = e;

		if (cd_edge_bweight_offset != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_bweight_offset, (float)me->bweight / 255.0f);
		if (cd_edge_crease_offset  != -1) BM_ELEM_CD_SET_FLOAT(e, cd_edge_crease_offset,  (float)me->crease  / 255.0f);

		if (UNLIKELY(has_orig_hflag & BM_EDGE)) {
			int *orig_index = CustomData_bmesh_get(&bm->edata, e->head.data, CD_ORIGINDEX);
			*orig_index = ORIGINDEX_NONE;
		}
	}
	if (!is_cddm) MEM_freeN(medge);
	if (is_init) bm->elem_index_dirty &= ~BM_EDGE;

	/* do faces */
	/* note: i_alt is aligned with bmesh faces which may not always align with mpolys */
	mp = dm->getPolyArray(dm);
	mloop = dm->getLoopArray(dm);
	face_normals = (dm->dirty & DM_DIRTY_NORMALS) ? NULL : CustomData_get_layer(&dm->polyData, CD_NORMAL);
	for (i = 0; i < dm->numPolyData; i++, mp++) {
		BMLoop *l_iter;
		BMLoop *l_first;

		f = bm_face_create_from_mpoly(mp, mloop + mp->loopstart,
		                              bm, vtable, etable);

		if (UNLIKELY(f == NULL)) {
			continue;
		}

		f->head.hflag = BM_face_flag_from_mflag(mp->flag);
		BM_elem_index_set(f, bm->totface - 1); /* set_inline */
		f->mat_nr = mp->mat_nr;

		j = mp->loopstart;
		l_iter = l_first = BM_FACE_FIRST_LOOP(f);
		do {
			/* Save index of correspsonding MLoop */
			CustomData_to_bmesh_block(&dm->loopData, &bm->ldata, j++, &l_iter->head.data, true);
		} while ((l_iter = l_iter->next) != l_first);

		CustomData_to_bmesh_block(&dm->polyData, &bm->pdata, i, &f->head.data, true);

		if (calc_face_normal) {
			if (face_normals) {
				copy_v3_v3(f->no, face_normals[i]);
			}
			else {
				BM_face_normal_update(f);
			}
		}

		if (UNLIKELY(has_orig_hflag & BM_FACE)) {
			int *orig_index = CustomData_bmesh_get(&bm->pdata, f->head.data, CD_ORIGINDEX);
			*orig_index = ORIGINDEX_NONE;
		}
	}
	if (is_init) bm->elem_index_dirty &= ~BM_FACE;

	MEM_freeN(vtable);
	MEM_freeN(etable);
}