BME_conversions.c

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/*
 * BME_mesh.c    jan 2007
 *
 *      BMesh mesh level functions.
 *
 * $Id: BME_conversions.c 35247 2011-02-27 20:40:57Z jesterking $
 *
 * ***** 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.
 * about this.  
 *
 * 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.
 *
 * The Original Code is Copyright (C) 2007 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Geoffrey Bantle, Levi Schooley.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "MEM_guardedalloc.h"

#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"

#include "BLI_edgehash.h"
#include "BLI_utildefines.h"

#include "BKE_mesh.h"
#include "BKE_cdderivedmesh.h"

//XXX #include "BIF_editmesh.h"
//XXX #include "editmesh.h"
#include "bmesh_private.h"

//XXX #include "BSE_edit.h"

/* XXX IMPORTANT: editmesh stuff doesn't belong in kernel! (ton) */

/*merge these functions*/
static void BME_DMcorners_to_loops(BME_Mesh *bm, CustomData *facedata, int index, BME_Poly *f, int numCol, int numTex){
        int i, j;
        BME_Loop *l;
        MTFace *texface;
        MTexPoly *texpoly;
        MCol *mcol;
        MLoopCol *mloopcol;
        MLoopUV *mloopuv;

        for(i=0; i< numTex; i++){
                texface = CustomData_get_layer_n(facedata, CD_MTFACE, i);
                texpoly = CustomData_bmesh_get_n(&bm->pdata, f->data, CD_MTEXPOLY, i);

                texpoly->tpage = texface[index].tpage;
                texpoly->flag = texface[index].flag;
                texpoly->transp = texface[index].transp;
                texpoly->mode = texface[index].mode;
                texpoly->tile = texface[index].tile;
                texpoly->unwrap = texface[index].unwrap;

                j = 0;
                l = f->loopbase;
                do{
                        mloopuv = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPUV, i);
                        mloopuv->uv[0] = texface[index].uv[j][0];
                        mloopuv->uv[1] = texface[index].uv[j][1];
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);
        }

        for(i=0; i < numCol; i++){
                mcol = CustomData_get_layer_n(facedata, CD_MCOL, i);
                j = 0;
                l = f->loopbase;
                do{
                        mloopcol = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPCOL, i);
                        mloopcol->r = mcol[(index*4)+j].r;
                        mloopcol->g = mcol[(index*4)+j].g;
                        mloopcol->b = mcol[(index*4)+j].b;
                        mloopcol->a = mcol[(index*4)+j].a;
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);
        }
}

static void BME_DMloops_to_corners(BME_Mesh *bm, CustomData *facedata, int index, BME_Poly *f,int numCol, int numTex){
        int i, j;
        BME_Loop *l;
        MTFace *texface;
        MTexPoly *texpoly;
        MCol *mcol;
        MLoopCol *mloopcol;
        MLoopUV *mloopuv;

        for(i=0; i < numTex; i++){
                texface = CustomData_get_layer_n(facedata, CD_MTFACE, i);
                texpoly = CustomData_bmesh_get_n(&bm->pdata, f->data, CD_MTEXPOLY, i);
                
                texface[index].tpage = texpoly->tpage;
                texface[index].flag = texpoly->flag;
                texface[index].transp = texpoly->transp;
                texface[index].mode = texpoly->mode;
                texface[index].tile = texpoly->tile;
                texface[index].unwrap = texpoly->unwrap;

                j = 0;
                l = f->loopbase;
                do{
                        mloopuv = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPUV, i);
                        texface[index].uv[j][0] = mloopuv->uv[0];
                        texface[index].uv[j][1] = mloopuv->uv[1];
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);

        }
        for(i=0; i < numCol; i++){
                mcol = CustomData_get_layer_n(facedata,CD_MCOL, i);
                j = 0;
                l = f->loopbase;
                do{
                        mloopcol = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPCOL, i);
                        mcol[(index*4) + j].r = mloopcol->r;
                        mcol[(index*4) + j].g = mloopcol->g;
                        mcol[(index*4) + j].b = mloopcol->b;
                        mcol[(index*4) + j].a = mloopcol->a;
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);
        }
}


static void BME_corners_to_loops(BME_Mesh *bm, CustomData *facedata, void *face_block, BME_Poly *f,int numCol, int numTex){
        int i, j;
        BME_Loop *l;
        MTFace *texface;
        MTexPoly *texpoly;
        MCol *mcol;
        MLoopCol *mloopcol;
        MLoopUV *mloopuv;

        for(i=0; i < numTex; i++){
                texface = CustomData_em_get_n(facedata, face_block, CD_MTFACE, i);
                texpoly = CustomData_bmesh_get_n(&bm->pdata, f->data, CD_MTEXPOLY, i);
                
                texpoly->tpage = texface->tpage;
                texpoly->flag = texface->flag;
                texpoly->transp = texface->transp;
                texpoly->mode = texface->mode;
                texpoly->tile = texface->tile;
                texpoly->unwrap = texface->unwrap;

                j = 0;
                l = f->loopbase;
                do{
                        mloopuv = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPUV, i);
                        mloopuv->uv[0] = texface->uv[j][0];
                        mloopuv->uv[1] = texface->uv[j][1];
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);

        }
        for(i=0; i < numCol; i++){
                mcol = CustomData_em_get_n(facedata, face_block, CD_MCOL, i);
                j = 0;
                l = f->loopbase;
                do{
                        mloopcol = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPCOL, i);
                        mloopcol->r = mcol[j].r;
                        mloopcol->g = mcol[j].g;
                        mloopcol->b = mcol[j].b;
                        mloopcol->a = mcol[j].a;
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);
        }
}

static void BME_loops_to_corners(BME_Mesh *bm, CustomData *facedata, void *face_block, BME_Poly *f,int numCol, int numTex){
        int i, j;
        BME_Loop *l;
        MTFace *texface;
        MTexPoly *texpoly;
        MCol *mcol;
        MLoopCol *mloopcol;
        MLoopUV *mloopuv;

        for(i=0; i < numTex; i++){
                texface = CustomData_em_get_n(facedata, face_block, CD_MTFACE, i);
                texpoly = CustomData_bmesh_get_n(&bm->pdata, f->data, CD_MTEXPOLY, i);
                
                texface->tpage = texpoly->tpage;
                texface->flag = texpoly->flag;
                texface->transp = texpoly->transp;
                texface->mode = texpoly->mode;
                texface->tile = texpoly->tile;
                texface->unwrap = texpoly->unwrap;

                j = 0;
                l = f->loopbase;
                do{
                        mloopuv = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPUV, i);
                        texface->uv[j][0] = mloopuv->uv[0];
                        texface->uv[j][1] = mloopuv->uv[1];
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);

        }
        for(i=0; i < numCol; i++){
                mcol = CustomData_em_get_n(facedata, face_block, CD_MCOL, i);
                j = 0;
                l = f->loopbase;
                do{
                        mloopcol = CustomData_bmesh_get_n(&bm->ldata, l->data, CD_MLOOPCOL, i);
                        mcol[j].r = mloopcol->r;
                        mcol[j].g = mloopcol->g;
                        mcol[j].b = mloopcol->b;
                        mcol[j].a = mloopcol->a;
                        j++;
                        l = l->next;
                }while(l!=f->loopbase);
        }
}
/*move the EditMesh conversion functions to editmesh_tools.c*/
BME_Mesh *BME_editmesh_to_bmesh(EditMesh *em) {
        BME_Mesh *bm;
        int allocsize[4] = {512,512,2048,512}, numTex, numCol;
        BME_Vert *v1, *v2;
        BME_Edge *e, *edar[4];
        BME_Poly *f;

        EditVert *eve;
        EditEdge *eed;
        EditFace *efa;

        int len;
        bm = BME_make_mesh(allocsize);

        /*copy custom data layout*/
        CustomData_copy(&em->vdata, &bm->vdata, CD_MASK_BMESH, CD_CALLOC, 0);
        CustomData_copy(&em->edata, &bm->edata, CD_MASK_BMESH, CD_CALLOC, 0);
        CustomData_copy(&em->fdata, &bm->pdata, CD_MASK_BMESH, CD_CALLOC, 0);

        /*copy face corner data*/
        CustomData_to_bmeshpoly(&em->fdata, &bm->pdata, &bm->ldata);
        /*initialize memory pools*/
        CustomData_bmesh_init_pool(&bm->vdata, allocsize[0]);
        CustomData_bmesh_init_pool(&bm->edata, allocsize[1]);
        CustomData_bmesh_init_pool(&bm->ldata, allocsize[2]);
        CustomData_bmesh_init_pool(&bm->pdata, allocsize[3]);
        /*needed later*/
        numTex = CustomData_number_of_layers(&bm->pdata, CD_MTEXPOLY);
        numCol = CustomData_number_of_layers(&bm->ldata, CD_MLOOPCOL);

        BME_model_begin(bm);
        /*add verts*/
        eve= em->verts.first;
        while(eve) {
                v1 = BME_MV(bm,eve->co);
                VECCOPY(v1->no,eve->no);
                v1->flag = eve->f;
                v1->h = eve->h;
                v1->bweight = eve->bweight;
                /*Copy Custom Data*/
                CustomData_bmesh_copy_data(&em->vdata, &bm->vdata, eve->data, &v1->data);
                eve->tmp.v = (EditVert*)v1;
                eve = eve->next;
        }
        
        /*add edges*/
        eed= em->edges.first;
        while(eed) {
                v1 = (BME_Vert*)eed->v1->tmp.v;
                v2 = (BME_Vert*)eed->v2->tmp.v;
                e = BME_ME(bm, v1, v2);
                e->crease = eed->crease;
                e->bweight = eed->bweight;
                e->flag = eed->f & SELECT;
                if(eed->sharp) e->flag |= ME_SHARP;
                if(eed->seam) e->flag |= ME_SEAM;
                //XXX if(eed->h & EM_FGON) e->flag |= ME_FGON;
                if(eed->h & 1) e->flag |= ME_HIDE;
                eed->tmp.e = (EditEdge*)e;
                CustomData_bmesh_copy_data(&em->edata, &bm->edata, eed->data, &e->data);
                eed = eed->next;
        }
        /*add faces.*/
        efa= em->faces.first;
        while(efa) {
                if(efa->v4) len = 4;
                else len = 3;
                
                edar[0] = (BME_Edge*)efa->e1->tmp.e;
                edar[1] = (BME_Edge*)efa->e2->tmp.e;
                edar[2] = (BME_Edge*)efa->e3->tmp.e;
                if(len == 4){
                        edar[3] = (BME_Edge*)efa->e4->tmp.e;
                }
                
                /*find v1 and v2*/
                v1 = (BME_Vert*)efa->v1->tmp.v;
                v2 = (BME_Vert*)efa->v2->tmp.v;
                
                f = BME_MF(bm,v1,v2,edar,len);
                f->mat_nr = efa->mat_nr;
                f->flag = efa->flag;
                if(efa->h) {
                        f->flag |= ME_HIDE;
                        f->flag &= ~ME_FACE_SEL;
                }
                else {
                        if(efa->f & 1) f->flag |= ME_FACE_SEL;
                        else f->flag &= ~ME_FACE_SEL;
                }
                CustomData_bmesh_copy_data(&em->fdata, &bm->pdata, efa->data, &f->data);
                BME_corners_to_loops(bm, &em->fdata, efa->data, f,numCol,numTex);
                efa = efa->next;
        }
        BME_model_end(bm);
        return bm;
}
/* adds the geometry in the bmesh to editMesh (does not free editMesh)
 * if td != NULL, the transdata will be mapped to the EditVert's co */
void BME_bmesh_to_editmesh(BME_Mesh *bm, BME_TransData_Head *td, EditMesh *em) {
        BME_Vert *v1;
        BME_Edge *e;
        BME_Poly *f;
        
        BME_TransData *vtd;

        EditVert *eve1, *eve2, *eve3, *eve4, **evlist;
        EditEdge *eed;
        EditFace *efa;

        int totvert, len, i, numTex, numCol;

        if (em == NULL) return;

        CustomData_copy(&bm->vdata, &em->vdata, CD_MASK_BMESH, CD_CALLOC, 0);
        CustomData_copy(&bm->edata, &em->edata, CD_MASK_BMESH, CD_CALLOC, 0);
        CustomData_copy(&bm->pdata, &em->fdata, CD_MASK_BMESH, CD_CALLOC, 0);
        CustomData_from_bmeshpoly(&em->fdata, &bm->pdata, &bm->ldata,0);
        numTex = CustomData_number_of_layers(&bm->pdata, CD_MTEXPOLY);
        numCol = CustomData_number_of_layers(&bm->ldata, CD_MLOOPCOL);


        /* convert to EditMesh */
        /* make editverts */
        totvert = BLI_countlist(&(bm->verts));
        evlist= (EditVert **)MEM_mallocN(totvert*sizeof(void *),"evlist");
        for (i=0,v1=bm->verts.first;v1;v1=v1->next,i++) {
                v1->tflag1 = i;
                eve1 = NULL; //XXX addvertlist(v1->co,NULL);
                if (td && (vtd = BME_get_transdata(td,v1))) {
                        vtd->loc = eve1->co;
                }
                eve1->keyindex = i;
                evlist[i]= eve1;
                eve1->f = (unsigned char)v1->flag;
                eve1->h = (unsigned char)v1->h;
                eve1->bweight = v1->bweight;
                CustomData_em_copy_data(&bm->vdata, &em->vdata, v1->data, &eve1->data);
        }
        
        /* make edges */
        for (e=bm->edges.first;e;e=e->next) {
                if(0) { //XXX if(!(findedgelist(evlist[e->v1->tflag1], evlist[e->v2->tflag1]))){
                        eed= NULL; //XXX addedgelist(evlist[e->v1->tflag1], evlist[e->v2->tflag1], NULL);
                        eed->crease = e->crease;
                        eed->bweight = e->bweight;
                        if(e->flag & ME_SEAM) eed->seam = 1;
                        if(e->flag & ME_SHARP) eed->sharp = 1;
                        if(e->flag & SELECT) eed->f |= SELECT;
                        //XXX if(e->flag & ME_FGON) eed->h= EM_FGON; // 2 different defines!
                        if(e->flag & ME_HIDE) eed->h |= 1;
                        if(em->selectmode==SCE_SELECT_EDGE) { 
                                ; //XXX EM_select_edge(eed, eed->f & SELECT);
                        }
                        CustomData_em_copy_data(&bm->edata, &em->edata, e->data, &eed->data);
                }
        }

        /* make faces */
        for (f=bm->polys.first;f;f=f->next) {
                len = BME_cycle_length(f->loopbase);
                if (len==3 || len==4) {
                        eve1= evlist[f->loopbase->v->tflag1];
                        eve2= evlist[f->loopbase->next->v->tflag1];
                        eve3= evlist[f->loopbase->next->next->v->tflag1];
                        if (len == 4) {
                                eve4= evlist[f->loopbase->prev->v->tflag1];
                        }
                        else {
                                eve4= NULL;
                        }

                        efa = NULL; //XXX addfacelist(eve1, eve2, eve3, eve4, NULL, NULL);
                        efa->mat_nr = (unsigned char)f->mat_nr;
                        efa->flag= f->flag & ~ME_HIDE;
                        if(f->flag & ME_FACE_SEL) {
                                efa->f |= SELECT;
                        }
                        if(f->flag & ME_HIDE) efa->h= 1;
                        // XXX flag depricated
                        // if((G.f & G_FACESELECT) && (efa->f & SELECT))
                                //XXX EM_select_face(efa, 1); /* flush down */
                        CustomData_em_copy_data(&bm->pdata, &em->fdata, f->data, &efa->data);
                        BME_loops_to_corners(bm, &em->fdata, efa->data, f,numCol,numTex);
                }
        }

        MEM_freeN(evlist);

}

/* Adds the geometry found in dm to bm
  */
BME_Mesh *BME_derivedmesh_to_bmesh(DerivedMesh *dm)
{
        
        BME_Mesh *bm;
        int allocsize[4] = {512,512,2048,512};
        MVert *mvert, *mv;
        MEdge *medge, *me;
        MFace *mface, *mf;
        int totface,totedge,totvert,i,len, numTex, numCol;
        BME_Vert *v1=NULL,*v2=NULL, **vert_array;
        BME_Edge *e=NULL;
        BME_Poly *f=NULL;
        
        EdgeHash *edge_hash = BLI_edgehash_new();

        bm = BME_make_mesh(allocsize);
        /*copy custom data layout*/
        CustomData_copy(&dm->vertData, &bm->vdata, CD_MASK_BMESH, CD_CALLOC, 0);
        CustomData_copy(&dm->edgeData, &bm->edata, CD_MASK_BMESH, CD_CALLOC, 0);
        CustomData_copy(&dm->faceData, &bm->pdata, CD_MASK_BMESH, CD_CALLOC, 0);

        /*copy face corner data*/
        CustomData_to_bmeshpoly(&dm->faceData, &bm->pdata, &bm->ldata);
        /*initialize memory pools*/
        CustomData_bmesh_init_pool(&bm->vdata, allocsize[0]);
        CustomData_bmesh_init_pool(&bm->edata, allocsize[1]);
        CustomData_bmesh_init_pool(&bm->ldata, allocsize[2]);
        CustomData_bmesh_init_pool(&bm->pdata, allocsize[3]);
        /*needed later*/
        numTex = CustomData_number_of_layers(&bm->pdata, CD_MTEXPOLY);
        numCol = CustomData_number_of_layers(&bm->ldata, CD_MLOOPCOL);

        totvert = dm->getNumVerts(dm);
        totedge = dm->getNumEdges(dm);
        totface = dm->getNumFaces(dm);
        mvert = dm->getVertArray(dm);
        medge = dm->getEdgeArray(dm);
        mface = dm->getFaceArray(dm);

        vert_array = MEM_mallocN(sizeof(*vert_array)*totvert,"BME_derivedmesh_to_bmesh BME_Vert* array");

        BME_model_begin(bm);
        /*add verts*/
        for(i=0,mv = mvert; i < totvert;i++,mv++){
                v1 = BME_MV(bm,mv->co);
                vert_array[i] = v1;
                v1->flag = mv->flag;
                v1->bweight = mv->bweight/255.0f;
                CustomData_to_bmesh_block(&dm->vertData, &bm->vdata, i, &v1->data);
        }
        /*add edges*/
        for(i=0,me = medge; i < totedge;i++,me++){
                v1 = vert_array[me->v1];
                v2 = vert_array[me->v2];
                e = BME_ME(bm, v1, v2);
                e->crease = me->crease/255.0f;
                e->bweight = me->bweight/255.0f;
                e->flag = (unsigned char)me->flag;
                BLI_edgehash_insert(edge_hash,me->v1,me->v2,e);
                CustomData_to_bmesh_block(&dm->edgeData, &bm->edata, i, &e->data);
        }
        /*add faces.*/
        for(i=0,mf = mface; i < totface;i++,mf++){
                BME_Edge *edar[4];
                if(mf->v4) len = 4;
                else len = 3;
                
                edar[0] = BLI_edgehash_lookup(edge_hash,mf->v1,mf->v2);
                edar[1] = BLI_edgehash_lookup(edge_hash,mf->v2,mf->v3);
                if(len == 4){
                        edar[2] = BLI_edgehash_lookup(edge_hash,mf->v3,mf->v4);
                        edar[3] = BLI_edgehash_lookup(edge_hash,mf->v4,mf->v1);
                }
                else
                        edar[2] = BLI_edgehash_lookup(edge_hash,mf->v3,mf->v1);
                
                /*find v1 and v2*/
                v1 = vert_array[mf->v1];
                v2 = vert_array[mf->v2];
                
                f = BME_MF(bm,v1,v2,edar,len);
                f->mat_nr = mf->mat_nr;
                f->flag = mf->flag;
                CustomData_to_bmesh_block(&dm->faceData,&bm->pdata,i,&f->data);
                BME_DMcorners_to_loops(bm, &dm->faceData,i,f, numCol,numTex);
        }
        
        BME_model_end(bm);
        BLI_edgehash_free(edge_hash, NULL);
        MEM_freeN(vert_array);
        return bm;
}

DerivedMesh *BME_bmesh_to_derivedmesh(BME_Mesh *bm, DerivedMesh *dm)
{
        MFace *mface, *mf;
        MEdge *medge, *me;
        MVert *mvert, *mv;
        int *origindex;
        int totface,totedge,totvert,i,bmeshok,len, numTex, numCol;

        BME_Vert *v1=NULL;
        BME_Edge *e=NULL, *oe=NULL;
        BME_Poly *f=NULL;
        
        DerivedMesh *result;
        EdgeHash *edge_hash = BLI_edgehash_new();

        totvert = BLI_countlist(&(bm->verts));
        totedge = 0;
        
        /*we cannot have double edges in a derived mesh!*/
        for(i=0, v1=bm->verts.first; v1; v1=v1->next, i++) v1->tflag1 = i;
        for(e=bm->edges.first; e; e=e->next){
                oe = BLI_edgehash_lookup(edge_hash,e->v1->tflag1, e->v2->tflag1);
                if(!oe){
                        totedge++;
                        BLI_edgehash_insert(edge_hash,e->v1->tflag1,e->v2->tflag1,e);
                        e->tflag2 = 1;
                }
                else{
                        e->tflag2 = 0;
                }
        }
        
        /*count quads and tris*/
        totface = 0;
        bmeshok = 1;
        for(f=bm->polys.first;f;f=f->next){
                len = BME_cycle_length(f->loopbase);
                if(len == 3 || len == 4) totface++;
        }
        
        /*convert back to mesh*/
        result = CDDM_from_template(dm,totvert,totedge,totface);
        CustomData_merge(&bm->vdata, &result->vertData, CD_MASK_BMESH, CD_CALLOC, totvert);
        CustomData_merge(&bm->edata, &result->edgeData, CD_MASK_BMESH, CD_CALLOC, totedge);
        CustomData_merge(&bm->pdata, &result->faceData, CD_MASK_BMESH, CD_CALLOC, totface);
        CustomData_from_bmeshpoly(&result->faceData, &bm->pdata, &bm->ldata,totface);
        numTex = CustomData_number_of_layers(&bm->pdata, CD_MTEXPOLY);
        numCol = CustomData_number_of_layers(&bm->ldata, CD_MLOOPCOL);


        /*Make Verts*/
        mvert = CDDM_get_verts(result);
        origindex = result->getVertDataArray(result, CD_ORIGINDEX);
        for(i=0,v1=bm->verts.first,mv=mvert;v1;v1=v1->next,i++,mv++){
                VECCOPY(mv->co,v1->co);
                mv->flag = (unsigned char)v1->flag;
                mv->bweight = (char)(255.0*v1->bweight);
                CustomData_from_bmesh_block(&bm->vdata, &result->vertData, &v1->data, i);
                origindex[i] = ORIGINDEX_NONE;
        }
        medge = CDDM_get_edges(result);
        origindex = result->getEdgeDataArray(result, CD_ORIGINDEX);
        i=0;
        for(e=bm->edges.first,me=medge;e;e=e->next){
                if(e->tflag2){
                        if(e->v1->tflag1 < e->v2->tflag1){
                                me->v1 = e->v1->tflag1;
                                me->v2 = e->v2->tflag1;
                        }
                        else{
                                me->v1 = e->v2->tflag1;
                                me->v2 = e->v1->tflag1;
                        }
                
                        me->crease = (char)(255.0*e->crease);
                        me->bweight = (char)(255.0*e->bweight);
                        me->flag = e->flag;
                        CustomData_from_bmesh_block(&bm->edata, &result->edgeData, &e->data, i);
                        origindex[i] = ORIGINDEX_NONE;
                        me++;
                        i++;
                }
        }
        if(totface){
                mface = CDDM_get_faces(result);
                origindex = result->getFaceDataArray(result, CD_ORIGINDEX);
                /*make faces*/
                for(i=0,f=bm->polys.first;f;f=f->next){
                        mf = &mface[i];
                        len = BME_cycle_length(f->loopbase);
                        if(len==3 || len==4){
                                mf->v1 = f->loopbase->v->tflag1;
                                mf->v2 = f->loopbase->next->v->tflag1;
                                mf->v3 = f->loopbase->next->next->v->tflag1;
                                if(len == 4){
                                        mf->v4 = f->loopbase->prev->v->tflag1;
                                }
                                /* test and rotate indexes if necessary so that verts 3 and 4 aren't index 0 */
                                if(mf->v3 == 0 || (len == 4 && mf->v4 == 0)){
                                        test_index_face(mf, NULL, i, len);
                                }
                                mf->mat_nr = (unsigned char)f->mat_nr;
                                mf->flag = (unsigned char)f->flag;
                                CustomData_from_bmesh_block(&bm->pdata, &result->faceData, &f->data, i);
                                BME_DMloops_to_corners(bm, &result->faceData, i, f,numCol,numTex);
                                origindex[i] = ORIGINDEX_NONE;
                                i++;
                        }
                }
        }
        BLI_edgehash_free(edge_hash, NULL);
        return result;
}