diff options
Diffstat (limited to 'source/blender/blenkernel/BKE_attribute.hh')
| -rw-r--r-- | source/blender/blenkernel/BKE_attribute.hh | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/source/blender/blenkernel/BKE_attribute.hh b/source/blender/blenkernel/BKE_attribute.hh index b92d0d4326b..108993d91c0 100644 --- a/source/blender/blenkernel/BKE_attribute.hh +++ b/source/blender/blenkernel/BKE_attribute.hh @@ -351,8 +351,9 @@ class AttributeAccessor { /** * The data that actually owns the attributes, for example, a pointer to a #Mesh or #PointCloud * Most commonly this is a pointer to a #Mesh or #PointCloud. - * Under some circumstances this can be null. In that case most methods can't be used. Just e.g. - * the #domain_size method works and returns 0 for every domain. + * Under some circumstances this can be null. In that case most methods can't be used. Allowed + * methods are #domain_size, #for_all and #is_builtin. We could potentially make these methods + * accessible without #AttributeAccessor and then #owner_ could always be non-null. * * \note This class cannot modify the owner's attributes, but the pointer is still non-const, so * this class can be a base class for the mutable version. @@ -509,7 +510,10 @@ class AttributeAccessor { */ bool for_all(const AttributeForeachCallback fn) const { - return fn_->for_all(owner_, fn); + if (owner_ != nullptr) { + return fn_->for_all(owner_, fn); + } + return true; } /** @@ -662,6 +666,22 @@ class MutableAttributeAccessor : public AttributeAccessor { void remove_anonymous(); }; +struct AttributeTransferData { + /* Expect that if an attribute exists, it is stored as a contiguous array internally anyway. */ + GVArraySpan src; + AttributeMetaData meta_data; + bke::GSpanAttributeWriter dst; +}; +/** + * Retrieve attribute arrays and writers for attributes that should be transferred between + * data-blocks of the same type. + */ +Vector<AttributeTransferData> retrieve_attributes_for_transfer( + const bke::AttributeAccessor &src_attributes, + bke::MutableAttributeAccessor &dst_attributes, + eAttrDomainMask domain_mask, + const Set<std::string> &skip = {}); + bool allow_procedural_attribute_access(StringRef attribute_name); extern const char *no_procedural_access_message; |