diff options
author | Sybren A. Stüvel <sybren@stuvel.eu> | 2017-04-04 18:05:47 +0300 |
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committer | Sybren A. Stüvel <sybren@stuvel.eu> | 2017-04-06 17:47:00 +0300 |
commit | bc55c19807d5b4fb5cceb98fd1790c227f21f3b4 (patch) | |
tree | 8401fa39672b73b5e5860c913da478b34eb8a811 /source/blender/alembic | |
parent | 42cd2719ec996fc3fd4fb8606c74d574c575b160 (diff) |
Alembic import: fixed crash on more complex model
There was a problem with parent-child relations not getting set up
correctly when an Alembic object was both the transform for a mesh object
and the parent of other mesh objects.
Diffstat (limited to 'source/blender/alembic')
-rw-r--r-- | source/blender/alembic/intern/abc_object.cc | 11 | ||||
-rw-r--r-- | source/blender/alembic/intern/alembic_capi.cc | 36 |
2 files changed, 43 insertions, 4 deletions
diff --git a/source/blender/alembic/intern/abc_object.cc b/source/blender/alembic/intern/abc_object.cc index 9afca0f0988..bc66f241071 100644 --- a/source/blender/alembic/intern/abc_object.cc +++ b/source/blender/alembic/intern/abc_object.cc @@ -286,6 +286,17 @@ void AbcObjectReader::read_matrix(float r_mat[4][4], const float time, } else { has_alembic_parent = ixform_parent && schema.getInheritsXforms(); + + if (has_alembic_parent && m_object->parent == NULL) { + /* TODO Sybren: This happened in some files. I think I solved it, + * but I'll leave this check in here anyway until we've tested it + * more thoroughly. Better than crashing on a null parent anyway. */ + std::cerr << "Alembic object " << m_iobject.getFullName() + << " with transform " << ixform.getFullName() + << " has an Alembic parent but no parent Blender object." + << std::endl; + has_alembic_parent = false; + } } const Imath::M44d matrix = get_matrix(schema, time); diff --git a/source/blender/alembic/intern/alembic_capi.cc b/source/blender/alembic/intern/alembic_capi.cc index 64f75feb5b5..5742f054aca 100644 --- a/source/blender/alembic/intern/alembic_capi.cc +++ b/source/blender/alembic/intern/alembic_capi.cc @@ -428,8 +428,13 @@ static bool visit_object(const IObject &object, // or a Blender object (Empty) themselves. size_t children_claiming_this_object = 0; size_t num_children = object.getNumChildren(); + IObject first_claiming_child; for (size_t i = 0; i < num_children; ++i) { - bool child_claims_this_object = visit_object(object.getChild(i), readers, readers_map, settings); + const IObject ichild = object.getChild(i); + bool child_claims_this_object = visit_object(ichild , readers, readers_map, settings); + if (child_claims_this_object && !first_claiming_child) { + first_claiming_child = ichild; + } children_claiming_this_object += child_claims_this_object ? 1 : 0; } @@ -521,7 +526,27 @@ static bool visit_object(const IObject &object, * memory, for example when dealing with instances. */ char * name_copy = static_cast<char *>(MEM_mallocN( full_name.length() + 1, - "Alembic readers_map key")); + "Alembic readers_map key 1")); + BLI_strncpy(name_copy, full_name.c_str(), full_name.length() + 1); + BLI_ghash_insert(readers_map, name_copy, reader); + } + else if (children_claiming_this_object > 0) { + /* In this case, add it to reader_map under the name of the claiming + * child, but do not add to readers. The latter is used to instantiate + * the new objects (which shouldn't be done for this one), whereas the + * former is used for parent-child relationships (for which this + * Alembic object should be represented by its claiming child). */ + + reader = reinterpret_cast<AbcObjectReader *>( + BLI_ghash_lookup(readers_map, + first_claiming_child.getFullName().c_str()) + ); + + /* We have to take a copy of the name, because Alembic can reuse + * memory, for example when dealing with instances. */ + char * name_copy = static_cast<char *>(MEM_mallocN( + full_name.length() + 1, + "Alembic readers_map key 2")); BLI_strncpy(name_copy, full_name.c_str(), full_name.length() + 1); BLI_ghash_insert(readers_map, name_copy, reader); } @@ -684,6 +709,7 @@ static void import_startjob(void *user_data, short *stop, short *do_update, floa const AbcObjectReader *reader = *iter; const AbcObjectReader *parent_reader = NULL; const IObject &iobject = reader->iobject(); + Object *ob = reader->object(); /* Find the parent reader by going up in the Alembic hierarchy until we find it. * Some Xform Alembic objects do not produce an AbcEmptyReader, since they @@ -695,7 +721,10 @@ static void import_startjob(void *user_data, short *stop, short *do_update, floa parent_reader = reinterpret_cast<AbcObjectReader *>( BLI_ghash_lookup(data->readers_map, parent_name)); - if (parent_reader != NULL) { + /* NULL means: the reader with this name doesn't exist + * equal to ob means: the Alembic object with this name represents + * the same object, and the real parent is found higher up. */ + if (parent_reader != NULL && parent_reader->object() != ob) { break; // found the parent reader. } @@ -706,7 +735,6 @@ static void import_startjob(void *user_data, short *stop, short *do_update, floa Object *blender_parent = parent_reader->object(); if (blender_parent != NULL && reader->object() != blender_parent) { - Object *ob = reader->object(); ob->parent = blender_parent; } } |