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/*
* 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.
*
* 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) 2020 Blender Foundation.
* All rights reserved.
*/
#include "abc_subdiv_disabler.h"
#include <stdio.h>
#include "BLI_listbase.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
#include "DNA_layer_types.h"
#include "DNA_mesh_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "BKE_modifier.h"
namespace blender {
namespace io {
namespace alembic {
SubdivModifierDisabler::SubdivModifierDisabler(Depsgraph *depsgraph) : depsgraph_(depsgraph)
{
}
SubdivModifierDisabler::~SubdivModifierDisabler()
{
for (ModifierData *modifier : disabled_modifiers_) {
modifier->mode &= ~eModifierMode_DisableTemporary;
}
}
void SubdivModifierDisabler::disable_modifiers()
{
Scene *scene = DEG_get_input_scene(depsgraph_);
ViewLayer *view_layer = DEG_get_input_view_layer(depsgraph_);
LISTBASE_FOREACH (Base *, base, &view_layer->object_bases) {
Object *object = base->object;
if (object->type != OB_MESH) {
continue;
}
ModifierData *subdiv = get_subdiv_modifier(scene, object);
if (subdiv == nullptr) {
continue;
}
/* This disables more modifiers than necessary, as it doesn't take restrictions like
* "export selected objects only" into account. However, with the subsurfs disabled,
* moving to a different frame is also going to be faster, so in the end this is probably
* a good thing to do. */
subdiv->mode |= eModifierMode_DisableTemporary;
disabled_modifiers_.insert(subdiv);
DEG_id_tag_update(&object->id, ID_RECALC_GEOMETRY);
}
}
/* Check if the mesh is a subsurf, ignoring disabled modifiers and
* displace if it's after subsurf. */
ModifierData *SubdivModifierDisabler::get_subdiv_modifier(Scene *scene, Object *ob)
{
ModifierData *md = static_cast<ModifierData *>(ob->modifiers.last);
for (; md; md = md->prev) {
if (!BKE_modifier_is_enabled(scene, md, eModifierMode_Render)) {
continue;
}
if (md->type == eModifierType_Subsurf) {
SubsurfModifierData *smd = reinterpret_cast<SubsurfModifierData *>(md);
if (smd->subdivType == ME_CC_SUBSURF) {
return md;
}
}
/* mesh is not a subsurf. break */
if ((md->type != eModifierType_Displace) && (md->type != eModifierType_ParticleSystem)) {
return nullptr;
}
}
return nullptr;
}
} // namespace alembic
} // namespace io
} // namespace blender
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