diff options
author | Jacques Lucke <jacques@blender.org> | 2021-09-27 18:35:26 +0300 |
---|---|---|
committer | Jacques Lucke <jacques@blender.org> | 2021-09-27 18:35:45 +0300 |
commit | 0559971ab3772e3b5efb0fcad396735ea4ac22fe (patch) | |
tree | e373f64625d71d643e03f28a1383ee7c9b276d42 /source | |
parent | 2189dfd6e25a7bb6b734116619d87bc2d2a535ff (diff) |
Geometry Nodes: add utility to process all instances separately
This adds a new `GeometrySet::modify_geometry_sets` method that can be
used to update each sub-geometry-set separately without making any
instances real.
Differential Revision: https://developer.blender.org/D12650
Diffstat (limited to 'source')
5 files changed, 104 insertions, 48 deletions
diff --git a/source/blender/blenkernel/BKE_geometry_set.hh b/source/blender/blenkernel/BKE_geometry_set.hh index 571c6c6a0a0..08bfdbf2382 100644 --- a/source/blender/blenkernel/BKE_geometry_set.hh +++ b/source/blender/blenkernel/BKE_geometry_set.hh @@ -309,6 +309,10 @@ struct GeometrySet { bool include_instances, blender::Map<blender::bke::AttributeIDRef, AttributeKind> &r_attributes) const; + using ForeachSubGeometryCallback = blender::FunctionRef<void(GeometrySet &geometry_set)>; + + void modify_geometry_sets(ForeachSubGeometryCallback callback); + /* Utility methods for creation. */ static GeometrySet create_with_mesh( Mesh *mesh, GeometryOwnershipType ownership = GeometryOwnershipType::Owned); @@ -479,7 +483,7 @@ class InstanceReference { Type type_ = Type::None; /** Depending on the type this is either null, an Object or Collection pointer. */ void *data_ = nullptr; - std::shared_ptr<GeometrySet> geometry_set_; + std::unique_ptr<GeometrySet> geometry_set_; public: InstanceReference() = default; @@ -494,8 +498,25 @@ class InstanceReference { InstanceReference(GeometrySet geometry_set) : type_(Type::GeometrySet), - geometry_set_(std::make_shared<GeometrySet>(std::move(geometry_set))) + geometry_set_(std::make_unique<GeometrySet>(std::move(geometry_set))) + { + } + + InstanceReference(const InstanceReference &other) : type_(other.type_), data_(other.data_) { + if (other.geometry_set_) { + geometry_set_ = std::make_unique<GeometrySet>(*other.geometry_set_); + } + } + + InstanceReference &operator=(const InstanceReference &other) + { + if (this == &other) { + return *this; + } + this->~InstanceReference(); + new (this) InstanceReference(other); + return *this; } Type type() const diff --git a/source/blender/blenkernel/intern/geometry_component_instances.cc b/source/blender/blenkernel/intern/geometry_component_instances.cc index f1f60266545..4204d62e1a7 100644 --- a/source/blender/blenkernel/intern/geometry_component_instances.cc +++ b/source/blender/blenkernel/intern/geometry_component_instances.cc @@ -125,44 +125,14 @@ 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. */ + /* If this assert fails, it means #ensure_geometry_instances must be called first or that the + * reference can't be converted to a geometry set. */ BLI_assert(references_[reference_index].type() == InstanceReference::Type::GeometrySet); /* The const cast is okay because the instance's hash in the set diff --git a/source/blender/blenkernel/intern/geometry_set.cc b/source/blender/blenkernel/intern/geometry_set.cc index 1ebdde75f46..3abe2fd2213 100644 --- a/source/blender/blenkernel/intern/geometry_set.cc +++ b/source/blender/blenkernel/intern/geometry_set.cc @@ -458,6 +458,28 @@ void GeometrySet::gather_attributes_for_propagation( delete dummy_component; } +/** + * Modify every (recursive) instance separately. This is often more efficient than realizing all + * instances just to change the same thing on all of them. + */ +void GeometrySet::modify_geometry_sets(ForeachSubGeometryCallback callback) +{ + callback(*this); + if (!this->has_instances()) { + return; + } + /* In the future this can be improved by deduplicating instance references across different + * instances. */ + InstancesComponent &instances_component = this->get_component_for_write<InstancesComponent>(); + instances_component.ensure_geometry_instances(); + for (const int handle : instances_component.references().index_range()) { + if (instances_component.references()[handle].type() == InstanceReference::Type::GeometrySet) { + GeometrySet &instance_geometry = instances_component.geometry_set_from_reference(handle); + instance_geometry.modify_geometry_sets(callback); + } + } +} + /** \} */ /* -------------------------------------------------------------------- */ diff --git a/source/blender/blenkernel/intern/geometry_set_instances.cc b/source/blender/blenkernel/intern/geometry_set_instances.cc index 162f91a4a47..ad13342ad9e 100644 --- a/source/blender/blenkernel/intern/geometry_set_instances.cc +++ b/source/blender/blenkernel/intern/geometry_set_instances.cc @@ -652,3 +652,58 @@ void InstancesComponent::foreach_referenced_geometry( } } } + +/** + * If references have a collection or object type, convert them into geometry instances + * recursively. After that, the geometry sets can be edited. There may still be instances of other + * types of they can't be converted to geometry sets. + */ +void InstancesComponent::ensure_geometry_instances() +{ + using namespace blender; + using namespace blender::bke; + VectorSet<InstanceReference> new_references; + new_references.reserve(references_.size()); + for (const InstanceReference &reference : references_) { + switch (reference.type()) { + case InstanceReference::Type::None: + case InstanceReference::Type::GeometrySet: { + /* Those references can stay as their were. */ + new_references.add_new(reference); + break; + } + case InstanceReference::Type::Object: { + /* Create a new reference that contains the geometry set of the object. We may want to + * treat e.g. lamps and similar object types separately here. */ + const Object &object = reference.object(); + GeometrySet object_geometry_set = object_get_geometry_set_for_read(object); + if (object_geometry_set.has_instances()) { + InstancesComponent &component = + object_geometry_set.get_component_for_write<InstancesComponent>(); + component.ensure_geometry_instances(); + } + new_references.add_new(std::move(object_geometry_set)); + break; + } + case InstanceReference::Type::Collection: { + /* Create a new reference that contains a geometry set that contains all objects from the + * collection as instances. */ + GeometrySet collection_geometry_set; + InstancesComponent &component = + collection_geometry_set.get_component_for_write<InstancesComponent>(); + Collection &collection = reference.collection(); + FOREACH_COLLECTION_OBJECT_RECURSIVE_BEGIN (&collection, object) { + const int handle = component.add_reference(*object); + component.add_instance(handle, object->obmat); + float4x4 &transform = component.instance_transforms().last(); + sub_v3_v3(transform.values[3], collection.instance_offset); + } + FOREACH_COLLECTION_OBJECT_RECURSIVE_END; + component.ensure_geometry_instances(); + new_references.add_new(std::move(collection_geometry_set)); + break; + } + } + } + references_ = std::move(new_references); +} diff --git a/source/blender/nodes/geometry/nodes/node_geo_curve_fill.cc b/source/blender/nodes/geometry/nodes/node_geo_curve_fill.cc index fcafdf93197..c30741cf786 100644 --- a/source/blender/nodes/geometry/nodes/node_geo_curve_fill.cc +++ b/source/blender/nodes/geometry/nodes/node_geo_curve_fill.cc @@ -154,20 +154,8 @@ static void geo_node_curve_fill_exec(GeoNodeExecParams params) const NodeGeometryCurveFill &storage = *(const NodeGeometryCurveFill *)params.node().storage; const GeometryNodeCurveFillMode mode = (GeometryNodeCurveFillMode)storage.mode; - if (geometry_set.has_instances()) { - InstancesComponent &instances = geometry_set.get_component_for_write<InstancesComponent>(); - instances.ensure_geometry_instances(); - - threading::parallel_for(IndexRange(instances.references_amount()), 16, [&](IndexRange range) { - for (int i : range) { - GeometrySet &geometry_set = instances.geometry_set_from_reference(i); - geometry_set = bke::geometry_set_realize_instances(geometry_set); - curve_fill_calculate(geometry_set, mode); - } - }); - } - - curve_fill_calculate(geometry_set, mode); + geometry_set.modify_geometry_sets( + [&](GeometrySet &geometry_set) { curve_fill_calculate(geometry_set, mode); }); params.set_output("Mesh", std::move(geometry_set)); } |