static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
ParticleSystemModifierData *psmd = (ParticleSystemModifierData *) md;
return psys_emitter_customdata_mask(psmd->psys);
}
/* single_psys_from is optional, if NULL all psys of ob_from are copied */
static bool copy_particle_systems_to_object(Scene *scene, Object *ob_from, ParticleSystem *single_psys_from, Object *ob_to, int space)
{
ModifierData *md;
ParticleSystem *psys_start = NULL, *psys, *psys_from;
ParticleSystem **tmp_psys;
DerivedMesh *final_dm;
CustomDataMask cdmask;
int i, totpsys;
if (ob_to->type != OB_MESH)
return false;
if (!ob_to->data || ((ID *)ob_to->data)->lib)
return false;
/* For remapping we need a valid DM.
* Because the modifiers are appended at the end it's safe to use
* the final DM of the object without particles.
* However, when evaluating the DM all the particle modifiers must be valid,
* i.e. have the psys assigned already.
* To break this hen/egg problem we create all psys separately first (to collect required customdata masks),
* then create the DM, then add them to the object and make the psys modifiers ...
*/
#define PSYS_FROM_FIRST (single_psys_from ? single_psys_from : ob_from->particlesystem.first)
#define PSYS_FROM_NEXT(cur) (single_psys_from ? NULL : (cur)->next)
totpsys = single_psys_from ? 1 : BLI_listbase_count(&ob_from->particlesystem);
tmp_psys = MEM_mallocN(sizeof(ParticleSystem*) * totpsys, "temporary particle system array");
cdmask = 0;
for (psys_from = PSYS_FROM_FIRST, i = 0;
psys_from;
psys_from = PSYS_FROM_NEXT(psys_from), ++i) {
psys = BKE_object_copy_particlesystem(psys_from);
tmp_psys[i] = psys;
if (psys_start == NULL)
psys_start = psys;
cdmask |= psys_emitter_customdata_mask(psys);
}
/* to iterate source and target psys in sync,
* we need to know where the newly added psys start
*/
psys_start = totpsys > 0 ? tmp_psys[0] : NULL;
/* get the DM (psys and their modifiers have not been appended yet) */
final_dm = mesh_get_derived_final(scene, ob_to, cdmask);
/* now append psys to the object and make modifiers */
for (i = 0, psys_from = PSYS_FROM_FIRST;
i < totpsys;
++i, psys_from = PSYS_FROM_NEXT(psys_from)) {
ParticleSystemModifierData *psmd;
psys = tmp_psys[i];
/* append to the object */
BLI_addtail(&ob_to->particlesystem, psys);
/* add a particle system modifier for each system */
md = modifier_new(eModifierType_ParticleSystem);
psmd = (ParticleSystemModifierData *)md;
/* push on top of the stack, no use trying to reproduce old stack order */
BLI_addtail(&ob_to->modifiers, md);
BLI_snprintf(md->name, sizeof(md->name), "ParticleSystem %i", i);
modifier_unique_name(&ob_to->modifiers, (ModifierData *)psmd);
psmd->psys = psys;
psmd->dm = CDDM_copy(final_dm);
CDDM_calc_normals(psmd->dm);
DM_ensure_tessface(psmd->dm);
if (psys_from->edit)
copy_particle_edit(scene, ob_to, psys, psys_from);
}
MEM_freeN(tmp_psys);
/* note: do this after creating DM copies for all the particle system modifiers,
* the remapping otherwise makes final_dm invalid!
*/
for (psys = psys_start, psys_from = PSYS_FROM_FIRST, i = 0;
psys;
psys = psys->next, psys_from = PSYS_FROM_NEXT(psys_from), ++i) {
float (*from_mat)[4], (*to_mat)[4];
switch (space) {
case PAR_COPY_SPACE_OBJECT:
from_mat = I;
to_mat = I;
break;
case PAR_COPY_SPACE_WORLD:
from_mat = ob_from->obmat;
to_mat = ob_to->obmat;
break;
default:
/* should not happen */
from_mat = to_mat = NULL;
BLI_assert(false);
break;
}
remap_hair_emitter(scene, ob_from, psys_from, ob_to, psys, psys->edit, from_mat, to_mat, psys_from->flag & PSYS_GLOBAL_HAIR, psys->flag & PSYS_GLOBAL_HAIR);
/* tag for recalc */
// psys->recalc |= PSYS_RECALC_RESET;
}
#undef PSYS_FROM_FIRST
#undef PSYS_FROM_NEXT
DAG_id_tag_update(&ob_to->id, OB_RECALC_DATA);
WM_main_add_notifier(NC_OBJECT | ND_PARTICLE | NA_EDITED, ob_to);
return true;
}
