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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) 2016 Kévin Dietrich.
* All rights reserved.
*/
/** \file
* \ingroup balembic
*/
#include "abc_writer_curves.h"
#include "intern/abc_axis_conversion.h"
#include "DNA_curve_types.h"
#include "DNA_object_types.h"
#include "BKE_curve.h"
#include "BKE_mesh.h"
#include "BKE_object.h"
#include "CLG_log.h"
static CLG_LogRef LOG = {"io.alembic"};
using Alembic::AbcGeom::OCompoundProperty;
using Alembic::AbcGeom::OCurves;
using Alembic::AbcGeom::OCurvesSchema;
using Alembic::AbcGeom::OInt16Property;
using Alembic::AbcGeom::ON3fGeomParam;
using Alembic::AbcGeom::OV2fGeomParam;
namespace blender::io::alembic {
const std::string ABC_CURVE_RESOLUTION_U_PROPNAME("blender:resolution");
ABCCurveWriter::ABCCurveWriter(const ABCWriterConstructorArgs &args) : ABCAbstractWriter(args)
{
}
void ABCCurveWriter::create_alembic_objects(const HierarchyContext *context)
{
CLOG_INFO(&LOG, 2, "exporting %s", args_.abc_path.c_str());
abc_curve_ = OCurves(args_.abc_parent, args_.abc_name, timesample_index_);
abc_curve_schema_ = abc_curve_.getSchema();
Curve *cu = static_cast<Curve *>(context->object->data);
OCompoundProperty user_props = abc_curve_schema_.getUserProperties();
OInt16Property user_prop_resolu(user_props, ABC_CURVE_RESOLUTION_U_PROPNAME);
user_prop_resolu.set(cu->resolu);
}
Alembic::Abc::OObject ABCCurveWriter::get_alembic_object() const
{
return abc_curve_;
}
Alembic::Abc::OCompoundProperty ABCCurveWriter::abc_prop_for_custom_props()
{
return abc_schema_prop_for_custom_props(abc_curve_schema_);
}
void ABCCurveWriter::do_write(HierarchyContext &context)
{
Curve *curve = static_cast<Curve *>(context.object->data);
std::vector<Imath::V3f> verts;
std::vector<int32_t> vert_counts;
std::vector<float> widths;
std::vector<float> weights;
std::vector<float> knots;
std::vector<uint8_t> orders;
Imath::V3f temp_vert;
Alembic::AbcGeom::BasisType curve_basis = Alembic::AbcGeom::kNoBasis;
Alembic::AbcGeom::CurveType curve_type = Alembic::AbcGeom::kVariableOrder;
Alembic::AbcGeom::CurvePeriodicity periodicity = Alembic::AbcGeom::kNonPeriodic;
Nurb *nurbs = static_cast<Nurb *>(curve->nurb.first);
for (; nurbs; nurbs = nurbs->next) {
if (nurbs->bp) {
curve_basis = Alembic::AbcGeom::kNoBasis;
curve_type = Alembic::AbcGeom::kVariableOrder;
const int totpoint = nurbs->pntsu * nurbs->pntsv;
const BPoint *point = nurbs->bp;
for (int i = 0; i < totpoint; i++, point++) {
copy_yup_from_zup(temp_vert.getValue(), point->vec);
verts.push_back(temp_vert);
weights.push_back(point->vec[3]);
widths.push_back(point->radius);
}
}
else if (nurbs->bezt) {
curve_basis = Alembic::AbcGeom::kBezierBasis;
curve_type = Alembic::AbcGeom::kCubic;
const int totpoint = nurbs->pntsu;
const BezTriple *bezier = nurbs->bezt;
/* TODO(kevin): store info about handles, Alembic doesn't have this. */
for (int i = 0; i < totpoint; i++, bezier++) {
copy_yup_from_zup(temp_vert.getValue(), bezier->vec[1]);
verts.push_back(temp_vert);
widths.push_back(bezier->radius);
}
}
if ((nurbs->flagu & CU_NURB_ENDPOINT) != 0) {
periodicity = Alembic::AbcGeom::kNonPeriodic;
}
else if ((nurbs->flagu & CU_NURB_CYCLIC) != 0) {
periodicity = Alembic::AbcGeom::kPeriodic;
/* Duplicate the start points to indicate that the curve is actually
* cyclic since other software need those.
*/
for (int i = 0; i < nurbs->orderu; i++) {
verts.push_back(verts[i]);
}
}
if (nurbs->knotsu != nullptr) {
const size_t num_knots = KNOTSU(nurbs);
/* Add an extra knot at the beginning and end of the array since most apps
* require/expect them. */
knots.resize(num_knots + 2);
for (int i = 0; i < num_knots; i++) {
knots[i + 1] = nurbs->knotsu[i];
}
if ((nurbs->flagu & CU_NURB_CYCLIC) != 0) {
knots[0] = nurbs->knotsu[0];
knots[num_knots - 1] = nurbs->knotsu[num_knots - 1];
}
else {
knots[0] = (2.0f * nurbs->knotsu[0] - nurbs->knotsu[1]);
knots[num_knots - 1] = (2.0f * nurbs->knotsu[num_knots - 1] -
nurbs->knotsu[num_knots - 2]);
}
}
orders.push_back(nurbs->orderu);
vert_counts.push_back(verts.size());
}
Alembic::AbcGeom::OFloatGeomParam::Sample width_sample;
width_sample.setVals(widths);
OCurvesSchema::Sample sample(verts,
vert_counts,
curve_type,
periodicity,
width_sample,
OV2fGeomParam::Sample(), /* UVs */
ON3fGeomParam::Sample(), /* normals */
curve_basis,
weights,
orders,
knots);
update_bounding_box(context.object);
sample.setSelfBounds(bounding_box_);
abc_curve_schema_.set(sample);
}
ABCCurveMeshWriter::ABCCurveMeshWriter(const ABCWriterConstructorArgs &args)
: ABCGenericMeshWriter(args)
{
}
Mesh *ABCCurveMeshWriter::get_export_mesh(Object *object_eval, bool &r_needsfree)
{
Mesh *mesh_eval = BKE_object_get_evaluated_mesh(object_eval);
if (mesh_eval != nullptr) {
/* Mesh_eval only exists when generative modifiers are in use. */
r_needsfree = false;
return mesh_eval;
}
r_needsfree = true;
return BKE_mesh_new_nomain_from_curve(object_eval);
}
} // namespace blender::io::alembic
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