diff options
Diffstat (limited to 'source/blender/blenkernel/intern/geometry_component_instances.cc')
-rw-r--r-- | source/blender/blenkernel/intern/geometry_component_instances.cc | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/geometry_component_instances.cc b/source/blender/blenkernel/intern/geometry_component_instances.cc index c4e1fe2f8e9..9479d012cb8 100644 --- a/source/blender/blenkernel/intern/geometry_component_instances.cc +++ b/source/blender/blenkernel/intern/geometry_component_instances.cc @@ -24,6 +24,7 @@ #include "DNA_collection_types.h" #include "BKE_geometry_set.hh" +#include "BKE_geometry_set_instances.hh" #include "attribute_access_intern.hh" @@ -32,6 +33,7 @@ using blender::Map; using blender::MutableSpan; using blender::Set; using blender::Span; +using blender::VectorSet; /* -------------------------------------------------------------------- */ /** \name Geometry Component Implementation @@ -120,6 +122,52 @@ blender::Span<int> InstancesComponent::instance_ids() const } /** + * If references have a collection or object type, convert them into geometry instances. This + * will join geometry components from nested instances if necessary. After that, the geometry + * sets can be edited. + */ +void InstancesComponent::ensure_geometry_instances() +{ + VectorSet<InstanceReference> new_references; + new_references.reserve(references_.size()); + for (const InstanceReference &reference : references_) { + if (reference.type() == InstanceReference::Type::Object) { + GeometrySet geometry_set; + InstancesComponent &instances = geometry_set.get_component_for_write<InstancesComponent>(); + const int handle = instances.add_reference(reference.object()); + instances.add_instance(handle, float4x4::identity()); + new_references.add_new(geometry_set); + } + else if (reference.type() == InstanceReference::Type::Collection) { + GeometrySet geometry_set; + InstancesComponent &instances = geometry_set.get_component_for_write<InstancesComponent>(); + const int handle = instances.add_reference(reference.collection()); + instances.add_instance(handle, float4x4::identity()); + new_references.add_new(geometry_set); + } + else { + new_references.add_new(reference); + } + } + references_ = std::move(new_references); +} + +/** + * With write access to the instances component, the data in the instanced geometry sets can be + * changed. This is a function on the component rather than each reference to ensure `const` + * correctness for that reason. + */ +GeometrySet &InstancesComponent::geometry_set_from_reference(const int reference_index) +{ + /* If this assert fails, it means #ensure_geometry_instances must be called first. */ + BLI_assert(references_[reference_index].type() == InstanceReference::Type::GeometrySet); + + /* The const cast is okay because the instance's hash in the set + * is not changed by adjusting the data inside the geometry set. */ + return const_cast<GeometrySet &>(references_[reference_index].geometry_set()); +} + +/** * Returns a handle for the given reference. * If the reference exists already, the handle of the existing reference is returned. * Otherwise a new handle is added. @@ -139,6 +187,11 @@ int InstancesComponent::instances_amount() const return instance_transforms_.size(); } +int InstancesComponent::references_amount() const +{ + return references_.size(); +} + bool InstancesComponent::is_empty() const { return this->instance_reference_handles_.size() == 0; |