static DerivedMesh *explodeMesh(ExplodeModifierData *emd,
ParticleSystemModifierData *psmd, Scene *scene, Object *ob,
DerivedMesh *to_explode)
{
DerivedMesh *explode, *dm = to_explode;
MFace *mf = NULL, *mface;
/* ParticleSettings *part=psmd->psys->part; */ /* UNUSED */
ParticleSimulationData sim = {NULL};
ParticleData *pa = NULL, *pars = psmd->psys->particles;
ParticleKey state, birth;
EdgeHash *vertpahash;
EdgeHashIterator *ehi;
float *vertco = NULL, imat[4][4];
float rot[4];
float cfra;
/* float timestep; */
const int *facepa = emd->facepa;
int totdup = 0, totvert = 0, totface = 0, totpart = 0, delface = 0;
int i, v, u;
unsigned int ed_v1, ed_v2, mindex = 0;
MTFace *mtface = NULL, *mtf;
totface = dm->getNumTessFaces(dm);
totvert = dm->getNumVerts(dm);
mface = dm->getTessFaceArray(dm);
totpart = psmd->psys->totpart;
sim.scene = scene;
sim.ob = ob;
sim.psys = psmd->psys;
sim.psmd = psmd;
/* timestep = psys_get_timestep(&sim); */
cfra = BKE_scene_frame_get(scene);
/* hash table for vertice <-> particle relations */
vertpahash = BLI_edgehash_new(__func__);
for (i = 0; i < totface; i++) {
if (facepa[i] != totpart) {
pa = pars + facepa[i];
if ((pa->alive == PARS_UNBORN && (emd->flag & eExplodeFlag_Unborn) == 0) ||
(pa->alive == PARS_ALIVE && (emd->flag & eExplodeFlag_Alive) == 0) ||
(pa->alive == PARS_DEAD && (emd->flag & eExplodeFlag_Dead) == 0))
{
delface++;
continue;
}
}
/* do mindex + totvert to ensure the vertex index to be the first
* with BLI_edgehashIterator_getKey */
if (facepa[i] == totpart || cfra < (pars + facepa[i])->time)
mindex = totvert + totpart;
else
mindex = totvert + facepa[i];
mf = &mface[i];
/* set face vertices to exist in particle group */
BLI_edgehash_reinsert(vertpahash, mf->v1, mindex, NULL);
BLI_edgehash_reinsert(vertpahash, mf->v2, mindex, NULL);
BLI_edgehash_reinsert(vertpahash, mf->v3, mindex, NULL);
if (mf->v4)
BLI_edgehash_reinsert(vertpahash, mf->v4, mindex, NULL);
}
/* make new vertice indexes & count total vertices after duplication */
ehi = BLI_edgehashIterator_new(vertpahash);
for (; !BLI_edgehashIterator_isDone(ehi); BLI_edgehashIterator_step(ehi)) {
BLI_edgehashIterator_setValue(ehi, SET_INT_IN_POINTER(totdup));
totdup++;
}
BLI_edgehashIterator_free(ehi);
/* the final duplicated vertices */
explode = CDDM_from_template_ex(dm, totdup, 0, totface - delface, 0, 0, CD_MASK_DERIVEDMESH | CD_MASK_FACECORNERS);
mtface = CustomData_get_layer_named(&explode->faceData, CD_MTFACE, emd->uvname);
/*dupvert = CDDM_get_verts(explode);*/
/* getting back to object space */
invert_m4_m4(imat, ob->obmat);
psmd->psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
/* duplicate & displace vertices */
ehi = BLI_edgehashIterator_new(vertpahash);
for (; !BLI_edgehashIterator_isDone(ehi); BLI_edgehashIterator_step(ehi)) {
MVert source;
MVert *dest;
/* get particle + vertex from hash */
BLI_edgehashIterator_getKey(ehi, &ed_v1, &ed_v2);
ed_v2 -= totvert;
v = GET_INT_FROM_POINTER(BLI_edgehashIterator_getValue(ehi));
dm->getVert(dm, ed_v1, &source);
dest = CDDM_get_vert(explode, v);
DM_copy_vert_data(dm, explode, ed_v1, v, 1);
*dest = source;
if (ed_v2 != totpart) {
/* get particle */
pa = pars + ed_v2;
psys_get_birth_coords(&sim, pa, &birth, 0, 0);
state.time = cfra;
psys_get_particle_state(&sim, ed_v2, &state, 1);
vertco = CDDM_get_vert(explode, v)->co;
mul_m4_v3(ob->obmat, vertco);
sub_v3_v3(vertco, birth.co);
/* apply rotation, size & location */
sub_qt_qtqt(rot, state.rot, birth.rot);
mul_qt_v3(rot, vertco);
if (emd->flag & eExplodeFlag_PaSize)
mul_v3_fl(vertco, pa->size);
add_v3_v3(vertco, state.co);
mul_m4_v3(imat, vertco);
}
}
BLI_edgehashIterator_free(ehi);
/*map new vertices to faces*/
for (i = 0, u = 0; i < totface; i++) {
MFace source;
int orig_v4;
if (facepa[i] != totpart) {
pa = pars + facepa[i];
if (pa->alive == PARS_UNBORN && (emd->flag & eExplodeFlag_Unborn) == 0) continue;
if (pa->alive == PARS_ALIVE && (emd->flag & eExplodeFlag_Alive) == 0) continue;
if (pa->alive == PARS_DEAD && (emd->flag & eExplodeFlag_Dead) == 0) continue;
}
dm->getTessFace(dm, i, &source);
mf = CDDM_get_tessface(explode, u);
orig_v4 = source.v4;
if (facepa[i] != totpart && cfra < pa->time)
mindex = totvert + totpart;
else
mindex = totvert + facepa[i];
source.v1 = edgecut_get(vertpahash, source.v1, mindex);
source.v2 = edgecut_get(vertpahash, source.v2, mindex);
source.v3 = edgecut_get(vertpahash, source.v3, mindex);
if (source.v4)
source.v4 = edgecut_get(vertpahash, source.v4, mindex);
DM_copy_tessface_data(dm, explode, i, u, 1);
*mf = source;
/* override uv channel for particle age */
if (mtface) {
float age = (cfra - pa->time) / pa->lifetime;
/* Clamp to this range to avoid flipping to the other side of the coordinates. */
CLAMP(age, 0.001f, 0.999f);
mtf = mtface + u;
mtf->uv[0][0] = mtf->uv[1][0] = mtf->uv[2][0] = mtf->uv[3][0] = age;
mtf->uv[0][1] = mtf->uv[1][1] = mtf->uv[2][1] = mtf->uv[3][1] = 0.5f;
}
test_index_face(mf, &explode->faceData, u, (orig_v4 ? 4 : 3));
u++;
}
/* cleanup */
BLI_edgehash_free(vertpahash, NULL);
/* finalization */
CDDM_calc_edges_tessface(explode);
CDDM_tessfaces_to_faces(explode);
explode->dirty |= DM_DIRTY_NORMALS;
if (psmd->psys->lattice_deform_data) {
end_latt_deform(psmd->psys->lattice_deform_data);
psmd->psys->lattice_deform_data = NULL;
}
return explode;
}
/**
* Calculate edges from polygons
*
* \param mesh The mesh to add edges into
* \param update When true create new edges co-exist
*/
void BKE_mesh_calc_edges(Mesh *mesh, bool update, const bool select)
{
CustomData edata;
EdgeHashIterator *ehi;
MPoly *mp;
MEdge *med, *med_orig;
EdgeHash *eh = BLI_edgehash_new();
int i, totedge, totpoly = mesh->totpoly;
int med_index;
/* select for newly created meshes which are selected [#25595] */
const short ed_flag = (ME_EDGEDRAW | ME_EDGERENDER) | (select ? SELECT : 0);
if (mesh->totedge == 0)
update = false;
if (update) {
/* assume existing edges are valid
* useful when adding more faces and generating edges from them */
med = mesh->medge;
for (i = 0; i < mesh->totedge; i++, med++)
BLI_edgehash_insert(eh, med->v1, med->v2, med);
}
/* mesh loops (bmesh only) */
for (mp = mesh->mpoly, i = 0; i < totpoly; mp++, i++) {
MLoop *l = &mesh->mloop[mp->loopstart];
int j, l_prev = (l + (mp->totloop - 1))->v;
for (j = 0; j < mp->totloop; j++, l++) {
if (!BLI_edgehash_haskey(eh, l_prev, l->v)) {
BLI_edgehash_insert(eh, l_prev, l->v, NULL);
}
l_prev = l->v;
}
}
totedge = BLI_edgehash_size(eh);
/* write new edges into a temporary CustomData */
CustomData_reset(&edata);
CustomData_add_layer(&edata, CD_MEDGE, CD_CALLOC, NULL, totedge);
med = CustomData_get_layer(&edata, CD_MEDGE);
for (ehi = BLI_edgehashIterator_new(eh), i = 0;
BLI_edgehashIterator_isDone(ehi) == FALSE;
BLI_edgehashIterator_step(ehi), ++i, ++med)
{
if (update && (med_orig = BLI_edgehashIterator_getValue(ehi))) {
*med = *med_orig; /* copy from the original */
}
else {
BLI_edgehashIterator_getKey(ehi, &med->v1, &med->v2);
med->flag = ed_flag;
}
/* store the new edge index in the hash value */
BLI_edgehashIterator_setValue(ehi, SET_INT_IN_POINTER(i));
}
BLI_edgehashIterator_free(ehi);
if (mesh->totpoly) {
/* second pass, iterate through all loops again and assign
* the newly created edges to them. */
for (mp = mesh->mpoly, i = 0; i < mesh->totpoly; mp++, i++) {
MLoop *l = &mesh->mloop[mp->loopstart];
MLoop *l_prev = (l + (mp->totloop - 1));
int j;
for (j = 0; j < mp->totloop; j++, l++) {
/* lookup hashed edge index */
med_index = GET_INT_FROM_POINTER(BLI_edgehash_lookup(eh, l_prev->v, l->v));
l_prev->e = med_index;
l_prev = l;
}
}
}
/* free old CustomData and assign new one */
CustomData_free(&mesh->edata, mesh->totedge);
mesh->edata = edata;
mesh->totedge = totedge;
mesh->medge = CustomData_get_layer(&mesh->edata, CD_MEDGE);
BLI_edgehash_free(eh, NULL);
}
static DerivedMesh *cutEdges(ExplodeModifierData *emd, DerivedMesh *dm)
{
DerivedMesh *splitdm;
MFace *mf = NULL, *df1 = NULL;
MFace *mface = dm->getTessFaceArray(dm);
MVert *dupve, *mv;
EdgeHash *edgehash;
EdgeHashIterator *ehi;
int totvert = dm->getNumVerts(dm);
int totface = dm->getNumTessFaces(dm);
int *facesplit = MEM_callocN(sizeof(int) * totface, "explode_facesplit");
int *vertpa = MEM_callocN(sizeof(int) * totvert, "explode_vertpa2");
int *facepa = emd->facepa;
int *fs, totesplit = 0, totfsplit = 0, curdupface = 0;
int i, v1, v2, v3, v4, esplit,
v[4] = {0, 0, 0, 0}, /* To quite gcc barking... */
uv[4] = {0, 0, 0, 0}; /* To quite gcc barking... */
int numlayer;
unsigned int ed_v1, ed_v2;
edgehash = BLI_edgehash_new(__func__);
/* recreate vertpa from facepa calculation */
for (i = 0, mf = mface; i < totface; i++, mf++) {
vertpa[mf->v1] = facepa[i];
vertpa[mf->v2] = facepa[i];
vertpa[mf->v3] = facepa[i];
if (mf->v4)
vertpa[mf->v4] = facepa[i];
}
/* mark edges for splitting and how to split faces */
for (i = 0, mf = mface, fs = facesplit; i < totface; i++, mf++, fs++) {
v1 = vertpa[mf->v1];
v2 = vertpa[mf->v2];
v3 = vertpa[mf->v3];
if (v1 != v2) {
BLI_edgehash_reinsert(edgehash, mf->v1, mf->v2, NULL);
(*fs) |= 1;
}
if (v2 != v3) {
BLI_edgehash_reinsert(edgehash, mf->v2, mf->v3, NULL);
(*fs) |= 2;
}
if (mf->v4) {
v4 = vertpa[mf->v4];
if (v3 != v4) {
BLI_edgehash_reinsert(edgehash, mf->v3, mf->v4, NULL);
(*fs) |= 4;
}
if (v1 != v4) {
BLI_edgehash_reinsert(edgehash, mf->v1, mf->v4, NULL);
(*fs) |= 8;
}
/* mark center vertex as a fake edge split */
if (*fs == 15)
BLI_edgehash_reinsert(edgehash, mf->v1, mf->v3, NULL);
}
else {
(*fs) |= 16; /* mark face as tri */
if (v1 != v3) {
BLI_edgehash_reinsert(edgehash, mf->v1, mf->v3, NULL);
(*fs) |= 4;
}
}
}
/* count splits & create indexes for new verts */
ehi = BLI_edgehashIterator_new(edgehash);
totesplit = totvert;
for (; !BLI_edgehashIterator_isDone(ehi); BLI_edgehashIterator_step(ehi)) {
BLI_edgehashIterator_setValue(ehi, SET_INT_IN_POINTER(totesplit));
totesplit++;
}
BLI_edgehashIterator_free(ehi);
/* count new faces due to splitting */
for (i = 0, fs = facesplit; i < totface; i++, fs++)
totfsplit += add_faces[*fs];
splitdm = CDDM_from_template(dm, totesplit, 0, totface + totfsplit, 0, 0);
numlayer = CustomData_number_of_layers(&splitdm->faceData, CD_MTFACE);
/* copy new faces & verts (is it really this painful with custom data??) */
for (i = 0; i < totvert; i++) {
MVert source;
MVert *dest;
dm->getVert(dm, i, &source);
dest = CDDM_get_vert(splitdm, i);
DM_copy_vert_data(dm, splitdm, i, i, 1);
*dest = source;
}
/* override original facepa (original pointer is saved in caller function) */
/* BMESH_TODO, (totfsplit * 2) over allocation is used since the quads are
* later interpreted as tri's, for this to work right I think we probably
* have to stop using tessface - campbell */
facepa = MEM_callocN(sizeof(int) * (totface + (totfsplit * 2)), "explode_facepa");
//memcpy(facepa, emd->facepa, totface*sizeof(int));
emd->facepa = facepa;
/* create new verts */
ehi = BLI_edgehashIterator_new(edgehash);
for (; !BLI_edgehashIterator_isDone(ehi); BLI_edgehashIterator_step(ehi)) {
BLI_edgehashIterator_getKey(ehi, &ed_v1, &ed_v2);
esplit = GET_INT_FROM_POINTER(BLI_edgehashIterator_getValue(ehi));
mv = CDDM_get_vert(splitdm, ed_v2);
dupve = CDDM_get_vert(splitdm, esplit);
DM_copy_vert_data(splitdm, splitdm, ed_v2, esplit, 1);
*dupve = *mv;
mv = CDDM_get_vert(splitdm, ed_v1);
mid_v3_v3v3(dupve->co, dupve->co, mv->co);
}
BLI_edgehashIterator_free(ehi);
/* create new faces */
curdupface = 0; //=totface;
//curdupin=totesplit;
for (i = 0, fs = facesplit; i < totface; i++, fs++) {
mf = dm->getTessFaceData(dm, i, CD_MFACE);
switch (*fs) {
case 3:
case 10:
case 11:
case 15:
SET_VERTS(1, 2, 3, 4);
break;
case 5:
case 6:
case 7:
SET_VERTS(2, 3, 4, 1);
break;
case 9:
case 13:
SET_VERTS(4, 1, 2, 3);
break;
case 12:
case 14:
SET_VERTS(3, 4, 1, 2);
break;
case 21:
case 23:
SET_VERTS(1, 2, 3, 4);
break;
case 19:
SET_VERTS(2, 3, 1, 4);
break;
case 22:
SET_VERTS(3, 1, 2, 4);
break;
}
switch (*fs) {
case 3:
case 6:
case 9:
case 12:
remap_faces_3_6_9_12(dm, splitdm, mf, facepa, vertpa, i, edgehash, curdupface, v[0], v[1], v[2], v[3]);
if (numlayer)
remap_uvs_3_6_9_12(dm, splitdm, numlayer, i, curdupface, uv[0], uv[1], uv[2], uv[3]);
break;
case 5:
case 10:
remap_faces_5_10(dm, splitdm, mf, facepa, vertpa, i, edgehash, curdupface, v[0], v[1], v[2], v[3]);
if (numlayer)
remap_uvs_5_10(dm, splitdm, numlayer, i, curdupface, uv[0], uv[1], uv[2], uv[3]);
break;
case 15:
remap_faces_15(dm, splitdm, mf, facepa, vertpa, i, edgehash, curdupface, v[0], v[1], v[2], v[3]);
if (numlayer)
remap_uvs_15(dm, splitdm, numlayer, i, curdupface, uv[0], uv[1], uv[2], uv[3]);
break;
case 7:
case 11:
case 13:
case 14:
remap_faces_7_11_13_14(dm, splitdm, mf, facepa, vertpa, i, edgehash, curdupface, v[0], v[1], v[2], v[3]);
if (numlayer)
remap_uvs_7_11_13_14(dm, splitdm, numlayer, i, curdupface, uv[0], uv[1], uv[2], uv[3]);
break;
case 19:
case 21:
case 22:
remap_faces_19_21_22(dm, splitdm, mf, facepa, vertpa, i, edgehash, curdupface, v[0], v[1], v[2]);
if (numlayer)
remap_uvs_19_21_22(dm, splitdm, numlayer, i, curdupface, uv[0], uv[1], uv[2]);
break;
case 23:
remap_faces_23(dm, splitdm, mf, facepa, vertpa, i, edgehash, curdupface, v[0], v[1], v[2]);
if (numlayer)
remap_uvs_23(dm, splitdm, numlayer, i, curdupface, uv[0], uv[1], uv[2]);
break;
case 0:
case 16:
df1 = get_dface(dm, splitdm, curdupface, i, mf);
facepa[curdupface] = vertpa[mf->v1];
if (df1->v4)
df1->flag |= ME_FACE_SEL;
else
df1->flag &= ~ME_FACE_SEL;
break;
}
curdupface += add_faces[*fs] + 1;
}
for (i = 0; i < curdupface; i++) {
mf = CDDM_get_tessface(splitdm, i);
test_index_face(mf, &splitdm->faceData, i, ((mf->flag & ME_FACE_SEL) ? 4 : 3));
}
BLI_edgehash_free(edgehash, NULL);
MEM_freeN(facesplit);
MEM_freeN(vertpa);
CDDM_calc_edges_tessface(splitdm);
CDDM_tessfaces_to_faces(splitdm); /*builds ngon faces from tess (mface) faces*/
return splitdm;
}
/**
* Specialized function to use when we _know_ existing edges don't overlap with poly edges.
*/
static void make_edges_mdata_extend(
MEdge **r_alledge, int *r_totedge, const MPoly *mpoly, MLoop *mloop, const int totpoly)
{
int totedge = *r_totedge;
int totedge_new;
EdgeHash *eh;
unsigned int eh_reserve;
const MPoly *mp;
int i;
eh_reserve = max_ii(totedge, BLI_EDGEHASH_SIZE_GUESS_FROM_POLYS(totpoly));
eh = BLI_edgehash_new_ex(__func__, eh_reserve);
for (i = 0, mp = mpoly; i < totpoly; i++, mp++) {
BKE_mesh_poly_edgehash_insert(eh, mp, mloop + mp->loopstart);
}
totedge_new = BLI_edgehash_len(eh);
#ifdef DEBUG
/* ensure that there's no overlap! */
if (totedge_new) {
MEdge *medge = *r_alledge;
for (i = 0; i < totedge; i++, medge++) {
BLI_assert(BLI_edgehash_haskey(eh, medge->v1, medge->v2) == false);
}
}
#endif
if (totedge_new) {
EdgeHashIterator *ehi;
MEdge *medge;
unsigned int e_index = totedge;
*r_alledge = medge = (*r_alledge ?
MEM_reallocN(*r_alledge, sizeof(MEdge) * (totedge + totedge_new)) :
MEM_calloc_arrayN(totedge_new, sizeof(MEdge), __func__));
medge += totedge;
totedge += totedge_new;
/* --- */
for (ehi = BLI_edgehashIterator_new(eh); BLI_edgehashIterator_isDone(ehi) == false;
BLI_edgehashIterator_step(ehi), ++medge, e_index++) {
BLI_edgehashIterator_getKey(ehi, &medge->v1, &medge->v2);
BLI_edgehashIterator_setValue(ehi, POINTER_FROM_UINT(e_index));
medge->crease = medge->bweight = 0;
medge->flag = ME_EDGEDRAW | ME_EDGERENDER;
}
BLI_edgehashIterator_free(ehi);
*r_totedge = totedge;
for (i = 0, mp = mpoly; i < totpoly; i++, mp++) {
MLoop *l = &mloop[mp->loopstart];
MLoop *l_prev = (l + (mp->totloop - 1));
int j;
for (j = 0; j < mp->totloop; j++, l++) {
/* lookup hashed edge index */
l_prev->e = POINTER_AS_UINT(BLI_edgehash_lookup(eh, l_prev->v, l->v));
l_prev = l;
}
}
}
BLI_edgehash_free(eh, NULL);
}