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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2019 Blender Foundation. All rights reserved. */
#include "usd_writer_transform.h"
#include "usd_hierarchy_iterator.h"
#include <pxr/base/gf/matrix4f.h>
#include <pxr/usd/usdGeom/xform.h>
#include "BKE_object.h"
#include "BLI_math_matrix.h"
#include "DNA_layer_types.h"
namespace blender::io::usd {
USDTransformWriter::USDTransformWriter(const USDExporterContext &ctx) : USDAbstractWriter(ctx)
{
}
void USDTransformWriter::do_write(HierarchyContext &context)
{
float parent_relative_matrix[4][4]; /* The object matrix relative to the parent. */
mul_m4_m4m4(parent_relative_matrix, context.parent_matrix_inv_world, context.matrix_world);
/* Write the transform relative to the parent. */
pxr::UsdGeomXform xform = pxr::UsdGeomXform::Define(usd_export_context_.stage,
usd_export_context_.usd_path);
if (!xformOp_) {
xformOp_ = xform.AddTransformOp();
}
xformOp_.Set(pxr::GfMatrix4d(parent_relative_matrix), get_export_time_code());
}
bool USDTransformWriter::check_is_animated(const HierarchyContext &context) const
{
if (context.duplicator != nullptr) {
/* This object is being duplicated, so could be emitted by a particle system and thus
* influenced by forces. TODO(Sybren): Make this more strict. Probably better to get from the
* depsgraph whether this object instance has a time source. */
return true;
}
if (check_has_physics(context)) {
return true;
}
return BKE_object_moves_in_time(context.object, context.animation_check_include_parent);
}
} // namespace blender::io::usd
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