diff options
author | Sybren A. Stüvel <sybren@blender.org> | 2020-06-19 17:36:10 +0300 |
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committer | Sybren A. Stüvel <sybren@blender.org> | 2020-06-30 12:38:46 +0300 |
commit | 2917df21adc8a1ce0423349909db61d22a38d451 (patch) | |
tree | 35b8ccdf0078fda4f186821b016701f46cb42c86 /source/blender/io/alembic/exporter/abc_writer_transform.h | |
parent | a2b7c84ae8eadf5983ee42091ce4e33315ca83ce (diff) |
Alembic: new exporter based on the USD exporter structure
The Alembic exporter has been restructured by leverages the
`AbstractHierarchyIterator` introduced by the USD exporter. The produced
Alembic files have not changed much (details below), as the Alembic
writing code has simply been moved from the old exporter to the new. How
the export hierarchy is handled changed a lot, though, and also the way
in which transforms are computed. As a result, T71395 is fixed.
Differences between the old and new exporter, in terms of the produced
Alembic file:
- Duplicated objects now have a unique numerical suffix.
- Matrices are computed differently, namely by simply computing the
evaluated transform of the object relative to the evaluated transform
of its export-parent. This fixes {T71395}, but otherwise should
produce the same result as before (but with simpler code).
Compared to the old Alembic exporter, Subdivision modifiers are now
disabled in a cleaner, more efficient way (they are disabled when
exporting with the "Apply Subdivisions" option is unchecked). Previously
the exporter would move to a new frame, disable the modifier, evaluate
the object, and enable the modifier again. This is now done before
exporting starts, and modifiers are only restored when exporting ends.
Some issues with the old Alembic exporter that have NOT been fixed in
this patch:
- Exporting NURBS patches and curves (see T49114 for example).
- Exporting flattened hierarchy in combination with dupli-objects. This
seems to be broken in the old Alembic exporter as well, but nobody
reported this yet.
Differential Revision: https://developer.blender.org/D7664
Reviewed By: Sergey
Diffstat (limited to 'source/blender/io/alembic/exporter/abc_writer_transform.h')
-rw-r--r-- | source/blender/io/alembic/exporter/abc_writer_transform.h | 41 |
1 files changed, 12 insertions, 29 deletions
diff --git a/source/blender/io/alembic/exporter/abc_writer_transform.h b/source/blender/io/alembic/exporter/abc_writer_transform.h index fc997d77f4c..950bff39c29 100644 --- a/source/blender/io/alembic/exporter/abc_writer_transform.h +++ b/source/blender/io/alembic/exporter/abc_writer_transform.h @@ -19,44 +19,27 @@ * \ingroup balembic */ -#include "abc_writer_object.h" +#include "abc_writer_abstract.h" -#include <Alembic/AbcGeom/All.h> +#include <Alembic/AbcGeom/OXform.h> namespace blender { namespace io { namespace alembic { -class AbcTransformWriter : public AbcObjectWriter { - Alembic::AbcGeom::OXform m_xform; - Alembic::AbcGeom::OXformSchema m_schema; - Alembic::AbcGeom::XformSample m_sample; - Alembic::AbcGeom::OVisibilityProperty m_visibility; - Alembic::Abc::M44d m_matrix; - - bool m_is_animated; - bool m_inherits_xform; - - public: - Object *m_proxy_from; +class ABCTransformWriter : public ABCAbstractWriter { + private: + Alembic::AbcGeom::OXform abc_xform_; + Alembic::AbcGeom::OXformSchema abc_xform_schema_; public: - AbcTransformWriter(Object *ob, - const Alembic::AbcGeom::OObject &abc_parent, - AbcTransformWriter *parent, - unsigned int time_sampling, - ExportSettings &settings); - - Alembic::AbcGeom::OXform &alembicXform() - { - return m_xform; - } - virtual Imath::Box3d bounds(); - - private: - virtual void do_write(); + explicit ABCTransformWriter(const ABCWriterConstructorArgs &args); + virtual void create_alembic_objects(const HierarchyContext *context) override; - bool hasAnimation(Object *ob) const; + protected: + virtual void do_write(HierarchyContext &context) override; + virtual bool check_is_animated(const HierarchyContext &context) const override; + virtual const Alembic::Abc::OObject get_alembic_object() const override; }; } // namespace alembic |