Blender  V3.3
abc_writer_transform.cc
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1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 
7 #include "abc_writer_transform.h"
10 #include "intern/abc_util.h"
11 
12 #include "BKE_object.h"
13 
14 #include "BLI_math_matrix.h"
15 #include "BLI_math_rotation.h"
16 
17 #include "DNA_layer_types.h"
18 
19 #include "CLG_log.h"
20 static CLG_LogRef LOG = {"io.alembic"};
21 
22 namespace blender::io::alembic {
23 
24 using Alembic::Abc::OObject;
25 using Alembic::AbcGeom::OXform;
26 using Alembic::AbcGeom::OXformSchema;
27 using Alembic::AbcGeom::XformSample;
28 
30  : ABCAbstractWriter(args)
31 {
33 }
34 
36 {
37  CLOG_INFO(&LOG, 2, "exporting %s", args_.abc_path.c_str());
38  abc_xform_ = OXform(args_.abc_parent, args_.abc_name, timesample_index_);
39  abc_xform_schema_ = abc_xform_.getSchema();
40 }
41 
42 Alembic::Abc::OCompoundProperty ABCTransformWriter::abc_prop_for_custom_props()
43 {
44  return abc_schema_prop_for_custom_props<OXformSchema>(abc_xform_schema_);
45 }
46 
48 {
49  const Object *object = context.object;
50  return object->id.properties;
51 }
52 
54 {
55  float parent_relative_matrix[4][4]; /* The object matrix relative to the parent. */
56  mul_m4_m4m4(parent_relative_matrix, context.parent_matrix_inv_world, context.matrix_world);
57 
58  /* After this, parent_relative_matrix uses Y=up. */
59  copy_m44_axis_swap(parent_relative_matrix, parent_relative_matrix, ABC_YUP_FROM_ZUP);
60 
61  /* If the parent is a camera, undo its to-Maya rotation (see below). */
62  bool is_root_object = context.export_parent == nullptr;
63  if (!is_root_object && context.export_parent->type == OB_CAMERA) {
64  float rot_mat[4][4];
65  axis_angle_to_mat4_single(rot_mat, 'X', M_PI_2);
66  mul_m4_m4m4(parent_relative_matrix, rot_mat, parent_relative_matrix);
67  }
68 
69  /* If the object is a camera, apply an extra rotation to Maya camera orientation. */
70  if (context.object->type == OB_CAMERA) {
71  float rot_mat[4][4];
72  axis_angle_to_mat4_single(rot_mat, 'X', -M_PI_2);
73  mul_m4_m4m4(parent_relative_matrix, parent_relative_matrix, rot_mat);
74  }
75 
76  if (is_root_object) {
77  /* Only apply scaling to root objects, parenting will propagate it. */
78  float scale_mat[4][4];
80  scale_mat[3][3] = args_.export_params->global_scale; /* also scale translation */
81  mul_m4_m4m4(parent_relative_matrix, parent_relative_matrix, scale_mat);
82  parent_relative_matrix[3][3] /=
83  args_.export_params->global_scale; /* Normalize the homogeneous component. */
84  }
85 
86  XformSample xform_sample;
87  xform_sample.setMatrix(convert_matrix_datatype(parent_relative_matrix));
88  xform_sample.setInheritsXforms(true);
89  abc_xform_schema_.set(xform_sample);
90 
92 }
93 
95 {
96  return abc_xform_;
97 }
98 
100 {
101  if (context.duplicator != nullptr) {
102  /* This object is being duplicated, so could be emitted by a particle system and thus
103  * influenced by forces. TODO(Sybren): Make this more strict. Probably better to get from the
104  * depsgraph whether this object instance has a time source. */
105  return true;
106  }
107  if (check_has_physics(context)) {
108  return true;
109  }
110  return BKE_object_moves_in_time(context.object, context.animation_check_include_parent);
111 }
112 
113 } // namespace blender::io::alembic
General operations, lookup, etc. for blender objects.
bool BKE_object_moves_in_time(const struct Object *object, bool recurse_parent)
#define M_PI_2
Definition: BLI_math_base.h:23
void mul_m4_m4m4(float R[4][4], const float A[4][4], const float B[4][4])
Definition: math_matrix.c:259
void scale_m4_fl(float R[4][4], float scale)
Definition: math_matrix.c:2297
void axis_angle_to_mat4_single(float R[4][4], char axis, float angle)
#define CLOG_INFO(clg_ref, level,...)
Definition: CLG_log.h:187
@ OB_CAMERA
static CLG_LogRef LOG
static bool check_has_physics(const HierarchyContext &context)
void write_visibility(const HierarchyContext &context)
const ABCWriterConstructorArgs args_
uint32_t time_sampling_index_transforms() const
Definition: abc_archive.cc:201
virtual Alembic::Abc::OObject get_alembic_object() const override
virtual void create_alembic_objects(const HierarchyContext *context) override
Alembic::Abc::OCompoundProperty abc_prop_for_custom_props() override
const IDProperty * get_id_properties(const HierarchyContext &context) const override
ABCTransformWriter(const ABCWriterConstructorArgs &args)
virtual bool check_is_animated(const HierarchyContext &context) const override
virtual void do_write(HierarchyContext &context) override
void copy_m44_axis_swap(float dst_mat[4][4], float src_mat[4][4], AbcAxisSwapMode mode)
Imath::M44d convert_matrix_datatype(float mat[4][4])
Definition: abc_util.cc:70