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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2016 Kévin Dietrich. All rights reserved. */
/** \file
* \ingroup balembic
*/
#include "abc_writer_points.h"
#include "DNA_object_types.h"
#include "DNA_particle_types.h"
#include "BKE_lattice.h"
#include "BKE_particle.h"
#include "BLI_math.h"
#include "DEG_depsgraph_query.h"
#include "CLG_log.h"
static CLG_LogRef LOG = {"io.alembic"};
namespace blender::io::alembic {
using Alembic::AbcGeom::kVertexScope;
using Alembic::AbcGeom::OPoints;
using Alembic::AbcGeom::OPointsSchema;
ABCPointsWriter::ABCPointsWriter(const ABCWriterConstructorArgs &args) : ABCAbstractWriter(args)
{
}
void ABCPointsWriter::create_alembic_objects(const HierarchyContext * /*context*/)
{
CLOG_INFO(&LOG, 2, "exporting OPoints %s", args_.abc_path.c_str());
abc_points_ = OPoints(args_.abc_parent, args_.abc_name, timesample_index_);
abc_points_schema_ = abc_points_.getSchema();
}
Alembic::Abc::OObject ABCPointsWriter::get_alembic_object() const
{
return abc_points_;
}
Alembic::Abc::OCompoundProperty ABCPointsWriter::abc_prop_for_custom_props()
{
return abc_schema_prop_for_custom_props(abc_points_schema_);
}
bool ABCPointsWriter::is_supported(const HierarchyContext *context) const
{
return ELEM(context->particle_system->part->type,
PART_EMITTER,
PART_FLUID_FLIP,
PART_FLUID_SPRAY,
PART_FLUID_BUBBLE,
PART_FLUID_FOAM,
PART_FLUID_TRACER,
PART_FLUID_SPRAYFOAM,
PART_FLUID_SPRAYBUBBLE,
PART_FLUID_FOAMBUBBLE,
PART_FLUID_SPRAYFOAMBUBBLE);
}
bool ABCPointsWriter::check_is_animated(const HierarchyContext & /*context*/) const
{
/* We assume that particles are always animated. */
return true;
}
void ABCPointsWriter::do_write(HierarchyContext &context)
{
BLI_assert(context.particle_system != nullptr);
std::vector<Imath::V3f> points;
std::vector<Imath::V3f> velocities;
std::vector<float> widths;
std::vector<uint64_t> ids;
ParticleSystem *psys = context.particle_system;
ParticleKey state;
ParticleSimulationData sim;
sim.depsgraph = args_.depsgraph;
sim.scene = DEG_get_evaluated_scene(args_.depsgraph);
sim.ob = context.object;
sim.psys = psys;
psys->lattice_deform_data = psys_create_lattice_deform_data(&sim);
uint64_t index = 0;
for (int p = 0; p < psys->totpart; p++) {
float pos[3], vel[3];
if (psys->particles[p].flag & (PARS_NO_DISP | PARS_UNEXIST)) {
continue;
}
state.time = DEG_get_ctime(args_.depsgraph);
if (psys_get_particle_state(&sim, p, &state, false) == 0) {
continue;
}
/* location */
mul_v3_m4v3(pos, context.object->world_to_object, state.co);
/* velocity */
sub_v3_v3v3(vel, state.co, psys->particles[p].prev_state.co);
/* Convert Z-up to Y-up. */
points.emplace_back(pos[0], pos[2], -pos[1]);
velocities.emplace_back(vel[0], vel[2], -vel[1]);
widths.push_back(psys->particles[p].size);
ids.push_back(index++);
}
if (psys->lattice_deform_data) {
BKE_lattice_deform_data_destroy(psys->lattice_deform_data);
psys->lattice_deform_data = nullptr;
}
Alembic::Abc::P3fArraySample psample(points);
Alembic::Abc::UInt64ArraySample idsample(ids);
Alembic::Abc::V3fArraySample vsample(velocities);
Alembic::Abc::FloatArraySample wsample_array(widths);
Alembic::AbcGeom::OFloatGeomParam::Sample wsample(wsample_array, kVertexScope);
OPointsSchema::Sample sample(psample, idsample, vsample, wsample);
update_bounding_box(context.object);
sample.setSelfBounds(bounding_box_);
abc_points_schema_.set(sample);
}
} // namespace blender::io::alembic
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