Cleanup: move Alembic, AVI, Collada, and USD to `source/blender/io`

This moves the `alembic`, `avi`, `collada`, and `usd` modules into a common
`io` directory.

This also cleans up some `#include "../../{somedir}/{somefile}.h"` by
adding `../../io/{somedir}` to `CMakeLists.txt` and then just using
`#include "{somefile}.h"`.

No functional changes.

1 files changed, 121 insertions, 0 deletions

diff --git a/source/blender/io/alembic/intern/abc_writer_transform.cc b/source/blender/io/alembic/intern/abc_writer_transform.cc
new file mode 100644
index 00000000000..d7bcc46d96f
--- /dev/null
+++ b/source/blender/io/alembic/intern/abc_writer_transform.cc
@@ -0,0 +1,121 @@
+/*
+ * 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.
+ */
+
+/** \file
+ * \ingroup balembic
+ */
+
+#include "abc_writer_transform.h"
+#include "abc_util.h"
+
+#include <OpenEXR/ImathBoxAlgo.h>
+
+extern "C" {
+#include "DNA_object_types.h"
+
+#include "BLI_math.h"
+
+#include "DEG_depsgraph_query.h"
+}
+
+using Alembic::AbcGeom::OObject;
+using Alembic::AbcGeom::OXform;
+
+AbcTransformWriter::AbcTransformWriter(Object *ob,
+                                       const OObject &abc_parent,
+                                       AbcTransformWriter *parent,
+                                       unsigned int time_sampling,
+                                       ExportSettings &settings)
+    : AbcObjectWriter(ob, time_sampling, settings, parent), m_proxy_from(NULL)
+{
+  m_is_animated = hasAnimation(m_object);
+
+  if (!m_is_animated) {
+    time_sampling = 0;
+  }
+
+  m_xform = OXform(abc_parent, get_id_name(m_object), time_sampling);
+  m_schema = m_xform.getSchema();
+
+  /* Blender objects can't have a parent without inheriting the transform. */
+  m_inherits_xform = parent != NULL;
+}
+
+void AbcTransformWriter::do_write()
+{
+  Object *ob_eval = DEG_get_evaluated_object(m_settings.depsgraph, m_object);
+
+  if (m_first_frame) {
+    m_visibility = Alembic::AbcGeom::CreateVisibilityProperty(
+        m_xform, m_xform.getSchema().getTimeSampling());
+  }
+
+  m_visibility.set(!(ob_eval->restrictflag & OB_RESTRICT_VIEWPORT));
+
+  if (!m_first_frame && !m_is_animated) {
+    return;
+  }
+
+  float yup_mat[4][4];
+  create_transform_matrix(
+      ob_eval, yup_mat, m_inherits_xform ? ABC_MATRIX_LOCAL : ABC_MATRIX_WORLD, m_proxy_from);
+
+  /* If the parent is a camera, undo its to-Maya rotation (see below). */
+  bool is_root_object = !m_inherits_xform || ob_eval->parent == nullptr;
+  if (!is_root_object && ob_eval->parent->type == OB_CAMERA) {
+    float rot_mat[4][4];
+    axis_angle_to_mat4_single(rot_mat, 'X', M_PI_2);
+    mul_m4_m4m4(yup_mat, rot_mat, yup_mat);
+  }
+
+  /* If the object is a camera, apply an extra rotation to Maya camera orientation. */
+  if (ob_eval->type == OB_CAMERA) {
+    float rot_mat[4][4];
+    axis_angle_to_mat4_single(rot_mat, 'X', -M_PI_2);
+    mul_m4_m4m4(yup_mat, yup_mat, rot_mat);
+  }
+
+  if (is_root_object) {
+    /* Only apply scaling to root objects, parenting will propagate it. */
+    float scale_mat[4][4];
+    scale_m4_fl(scale_mat, m_settings.global_scale);
+    scale_mat[3][3] = m_settings.global_scale; /* also scale translation */
+    mul_m4_m4m4(yup_mat, yup_mat, scale_mat);
+    yup_mat[3][3] /= m_settings.global_scale; /* normalise the homogeneous component */
+  }
+
+  m_matrix = convert_matrix_datatype(yup_mat);
+  m_sample.setMatrix(m_matrix);
+  m_sample.setInheritsXforms(m_inherits_xform);
+  m_schema.set(m_sample);
+}
+
+Imath::Box3d AbcTransformWriter::bounds()
+{
+  Imath::Box3d bounds;
+
+  for (int i = 0; i < m_children.size(); i++) {
+    Imath::Box3d box(m_children[i]->bounds());
+    bounds.extendBy(box);
+  }
+
+  return Imath::transform(bounds, m_matrix);
+}
+
+bool AbcTransformWriter::hasAnimation(Object * /*ob*/) const
+{
+  return true;
+}