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davidhaver-WIP-realize-depth #3

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David-Haver wants to merge 65 commits from David-Haver/blender-old:davidhaver-WIP-realize-depth into WIP-realize-depth
pull from: David-Haver/blender-old:davidhaver-WIP-realize-depth
merge into: aryeramaty:WIP-realize-depth

When changing the target branch, be careful to rebase the branch in your fork to match. See documentation.
Conversation 0 Commits 65 Files Changed 5 +176 -119
4 changed files with 176 additions and 119 deletions
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28
source/blender/geometry/GEO_realize_instances.hh
View File

@ -8,6 +8,9 @@
namespace blender::geometry {
/**
* General options for realize_instances.
*/
struct RealizeInstancesOptions {
/**
* The default is to generate new ids for every element (when there was any id attribute in the
@ -22,6 +25,13 @@ struct RealizeInstancesOptions {
*/
bool realize_instance_attributes = true;
bke::AnonymousAttributePropagationInfo propagation_info;
};
/**
* Allow the user to choice which instances to realize and to what depth.
*/
struct SpecificInstancesChoice {
/**
* Selection of top-level instances to realize.
*/
@ -32,7 +42,7 @@ struct RealizeInstancesOptions {
*/
VArray<int> depths;
bke::AnonymousAttributePropagationInfo propagation_info;
static const int MAX_DEPTH = -1;
};
/**
@ -48,4 +58,20 @@ struct RealizeInstancesOptions {
bke::GeometrySet realize_instances(bke::GeometrySet geometry_set,
const RealizeInstancesOptions &options);
/**
* Join all instances into a single geometry component for each geometry type. For example, all
* mesh instances (including the already realized mesh) are joined into a single mesh. The output
* geometry set does not contain any instances. If the input did not contain any instances, it is
* returned directly.
*
* The `id` attribute has special handling. If there is an id attribute on any component, the
* output will contain an `id` attribute as well. The output id is generated by mixing/hashing ids
* of instances and of the instanced geometry data.
*
* Will realize only the instaces chosen by chosen_instaces to there chosen depth.
*/
bke::GeometrySet realize_instances(bke::GeometrySet geometry_set,
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instaces);
} // namespace blender::geometry

5
source/blender/geometry/intern/join_geometries.cc
View File

@ -185,10 +185,7 @@ static void join_component_type(const bke::GeometryComponent::Type component_typ
options.keep_original_ids = true;
options.realize_instance_attributes = false;
options.propagation_info = propagation_info;
options.depths = VArray<int>::ForSingle(-1, instances.get()->instances_num());
IndexMaskMemory memory;
options.selection = IndexMask::from_bools(
VArray<bool>::ForSingle(true, instances.get()->instances_num()), memory);
GeometrySet joined_components = realize_instances(
GeometrySet::from_instances(instances.release()), options);
r_result.add(joined_components.get_component_for_write(component_type));

185
source/blender/geometry/intern/realize_instances.cc
View File

@ -49,13 +49,13 @@ struct OrderedAttributes {
}
};
struct AttributeFallbacksArray {
/**
/**
* Instance attribute values used as fallback when the geometry does not have the
* corresponding attributes itself. The pointers point to attributes stored in the instances
* component or in #r_temporary_arrays. The order depends on the corresponding #OrderedAttributes
* instance.
*/
struct AttributeFallbacksArray {
Array<const void *> array;
AttributeFallbacksArray(int size) : array(size, nullptr) {}
@ -400,12 +400,12 @@ static void copy_generic_attributes_to_result(
});
}
static void create_result_ids(const RealizeInstancesOptions &options,
static void create_result_ids(bool keep_original_ids,
Span<int> stored_ids,
const int task_id,
MutableSpan<int> dst_ids)
{
if (options.keep_original_ids) {
if (keep_original_ids) {
if (stored_ids.is_empty()) {
dst_ids.fill(0);
}
@ -733,6 +733,15 @@ static void gather_realize_tasks_recursive(GatherTasksInfo &gather_info,
}
}
/**
* This function iterates through a set of geometries, applying a callback to each attribute of
* eligible children based on specified conditions. Attributes should not be removed or added
* by the callback. Relevant children are determined by three criteria: the component type
* (e.g., mesh, curve), a depth value greater than 0 and aselection. If the primary component
* is an instance, the condition is true only when the depthis exactly 0. Additionally, the
* function extends its operation to instances if any of theirnested children meet the first
* condition. Also, an initial depth of 0 is equal to infinity for iteration easier use.
*/
bool static attribute_foreach(const bke::GeometrySet &geometry_set,
const Span<bke::GeometryComponent::Type> component_types,
const int current_depth,
@ -741,44 +750,32 @@ bool static attribute_foreach(const bke::GeometrySet &geometry_set,
const IndexMask selection,
const bke::GeometrySet::AttributeForeachCallback callback)
{
/**
* This function iterates through a set of geometries, applying a callback to each attribute of
* eligible children based on specified conditions. Relevant children are determined by three
* criteria: the component type (e.g., mesh, curve), a depth value greater than 0 and a
* selection. If the primary component is an instance, the condition is true only when the depth
* is exactly 0. Additionally, the function extends its operation to instances if any of their
* nested children meet the first condition. Also, an initial depth of 0 is equal to infinity for
* easier use.
*/
/*Initialize flag to track if child instances have the specified components.*/
bool is_child_has_component = true;
bool child_has_component = true;
if (geometry_set.has_instances()) {
is_child_has_component = false;
child_has_component = false;
const Instances &instances = *geometry_set.get_instances();
/*ensure objects and collection are included.*/
Instances ensure_instances = instances;
const IndexMask indices = (current_depth == 0) ?
const IndexMask indices = (0 == current_depth) ?
selection :
IndexMask(IndexRange(instances.instances_num()));
for (const int index : indices.index_range()) {
const int i = indices[index];
const int depth_target_tmp = (current_depth == 0) ? instance_depth[i] : depth_target;
const int depth_target_tmp = (0 == current_depth) ? instance_depth[i] : depth_target;
bke::GeometrySet instance_geometry_set;
geometry_set_from_reference(instances.references()[instances.reference_handles()[i]],
instance_geometry_set);
/*Process child instances with a recursive call.*/
if (current_depth != depth_target_tmp) {
is_child_has_component = attribute_foreach(instance_geometry_set,
child_has_component = child_has_component | attribute_foreach(instance_geometry_set,
component_types,
current_depth + 1,
depth_target_tmp,
instance_depth,
selection,
callback) ||
is_child_has_component;
callback);
}
}
}
@ -787,16 +784,12 @@ bool static attribute_foreach(const bke::GeometrySet &geometry_set,
bool is_relevant = false;
for (const bke::GeometryComponent::Type component_type : component_types) {
if (!geometry_set.has(component_type)) {
continue;
}
if (geometry_set.has(component_type)) {
/*Check if the current instance components is the main one*/
const bool is_special_instance = (component_type == bke::GeometryComponent::Type::Instance) &&
const bool is_special_instance = (bke::GeometryComponent::Type::Instance ==
component_type) &&
(component_types.size() > 1);
if (is_special_instance && !is_child_has_component) {
continue;
}
if (!is_special_instance || child_has_component) {
/*Process attributes for the current component.*/
const bke::GeometryComponent &component = *geometry_set.get_component(component_type);
const std::optional<bke::AttributeAccessor> attributes = component.attributes();
@ -810,6 +803,8 @@ bool static attribute_foreach(const bke::GeometrySet &geometry_set,
is_relevant = true;
}
}
}
}
return is_relevant;
}
@ -830,7 +825,7 @@ void static gather_attributes_for_propagation(
attribute_foreach(re_geometry_set,
component_types,
0,
-1,
SpecificInstancesChoice::MAX_DEPTH,
instance_depth,
selection,
[&](const AttributeIDRef &attribute_id,
@ -881,7 +876,7 @@ void static gather_attributes_for_propagation(
static OrderedAttributes gather_generic_instance_attributes_to_propagate(
const bke::GeometrySet &in_geometry_set,
const RealizeInstancesOptions &options,
bool &r_create_id)
const SpecificInstancesChoice &chosen_instances)
{
Vector<bke::GeometryComponent::Type> src_component_types;
src_component_types.append(bke::GeometryComponent::Type::Instance);
@ -890,13 +885,13 @@ static OrderedAttributes gather_generic_instance_attributes_to_propagate(
gather_attributes_for_propagation(in_geometry_set,
src_component_types,
bke::GeometryComponent::Type::Instance,
options.depths,
options.selection,
chosen_instances.depths,
chosen_instances.selection,
options.propagation_info,
attributes_to_propagate);
attributes_to_propagate.remove("position");
attributes_to_propagate.remove("radius");
r_create_id = attributes_to_propagate.pop_try("id").has_value();
attributes_to_propagate.pop_try("id").has_value();
OrderedAttributes ordered_attributes;
for (const auto item : attributes_to_propagate.items()) {
ordered_attributes.ids.add_new(item.key);
@ -908,6 +903,7 @@ static OrderedAttributes gather_generic_instance_attributes_to_propagate(
static OrderedAttributes gather_generic_pointcloud_attributes_to_propagate(
const bke::GeometrySet &in_geometry_set,
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instances,
bool &r_create_radii,
bool &r_create_id)
{
@ -919,15 +915,15 @@ static OrderedAttributes gather_generic_pointcloud_attributes_to_propagate(
Map<AttributeIDRef, AttributeKind> attributes_to_propagate;
// in_geometry_set.gather_attributes_for_propagation(src_component_types,
// bke::GeometryComponent::Type::PointCloud,
// options.depths,
// options.selection,
// chosen_instances.depths,
// chosen_instances.selection,
// options.propagation_info,
// attributes_to_propagate);
gather_attributes_for_propagation(in_geometry_set,
src_component_types,
bke::GeometryComponent::Type::PointCloud,
options.depths,
options.selection,
chosen_instances.depths,
chosen_instances.selection,
options.propagation_info,
attributes_to_propagate);
attributes_to_propagate.remove("position");
@ -957,11 +953,15 @@ static void gather_pointclouds_to_realize(const bke::GeometrySet &geometry_set,
}
static AllPointCloudsInfo preprocess_pointclouds(const bke::GeometrySet &geometry_set,
const RealizeInstancesOptions &options)
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instances)
{
AllPointCloudsInfo info;
info.attributes = gather_generic_pointcloud_attributes_to_propagate(
geometry_set, options, info.create_radius_attribute, info.create_id_attribute);
info.attributes = gather_generic_pointcloud_attributes_to_propagate(geometry_set,
options,
chosen_instances,
info.create_radius_attribute,
info.create_id_attribute);
gather_pointclouds_to_realize(geometry_set, info.order);
info.realize_info.reinitialize(info.order.size());
@ -1000,7 +1000,7 @@ static AllPointCloudsInfo preprocess_pointclouds(const bke::GeometrySet &geometr
}
static void execute_realize_pointcloud_task(
const RealizeInstancesOptions &options,
bool keep_original_ids,
const RealizePointCloudTask &task,
const OrderedAttributes &ordered_attributes,
MutableSpan<GSpanAttributeWriter> dst_attribute_writers,
@ -1018,7 +1018,7 @@ static void execute_realize_pointcloud_task(
/* Create point ids. */
if (!all_dst_ids.is_empty()) {
create_result_ids(
options, pointcloud_info.stored_ids, task.id, all_dst_ids.slice(point_slice));
keep_original_ids, pointcloud_info.stored_ids, task.id, all_dst_ids.slice(point_slice));
}
if (!all_dst_radii.is_empty()) {
pointcloud_info.radii.materialize(all_dst_radii.slice(point_slice));
@ -1035,6 +1035,7 @@ static void execute_realize_pointcloud_task(
},
dst_attribute_writers);
}
static void execute_instances_tasks(
const Span<bke::GeometryComponentPtr> src_components,
Span<blender::float4x4> src_base_transforms,
@ -1119,8 +1120,7 @@ static void execute_instances_tasks(
result.replace_instances(dst_instances.release());
auto &dst_component = result.get_component_for_write<bke::InstancesComponent>();
Vector<const bke::GeometryComponent *> for_join_attributes;
for (bke::GeometryComponentPtr compent : src_components)
{
for (bke::GeometryComponentPtr compent : src_components) {
for_join_attributes.append(compent.get());
}
@ -1128,7 +1128,7 @@ static void execute_instances_tasks(
for_join_attributes, dst_component, {"position", ".reference_index", "instance_transform"});
}
static void execute_realize_pointcloud_tasks(const RealizeInstancesOptions &options,
static void execute_realize_pointcloud_tasks(bool keep_original_ids,
const AllPointCloudsInfo &all_pointclouds_info,
const Span<RealizePointCloudTask> tasks,
const OrderedAttributes &ordered_attributes,
@ -1180,7 +1180,7 @@ static void execute_realize_pointcloud_tasks(const RealizeInstancesOptions &opti
threading::parallel_for(tasks.index_range(), 100, [&](const IndexRange task_range) {
for (const int task_index : task_range) {
const RealizePointCloudTask &task = tasks[task_index];
execute_realize_pointcloud_task(options,
execute_realize_pointcloud_task(keep_original_ids,
task,
ordered_attributes,
dst_attribute_writers,
@ -1208,6 +1208,7 @@ static void execute_realize_pointcloud_tasks(const RealizeInstancesOptions &opti
static OrderedAttributes gather_generic_mesh_attributes_to_propagate(
const bke::GeometrySet &in_geometry_set,
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instances,
bool &r_create_id,
bool &r_create_material_index)
{
@ -1221,8 +1222,8 @@ static OrderedAttributes gather_generic_mesh_attributes_to_propagate(
gather_attributes_for_propagation(in_geometry_set,
src_component_types,
bke::GeometryComponent::Type::Mesh,
options.depths,
options.selection,
chosen_instances.depths,
chosen_instances.selection,
options.propagation_info,
attributes_to_propagate);
attributes_to_propagate.remove("position");
@ -1255,11 +1256,16 @@ static void gather_meshes_to_realize(const bke::GeometrySet &geometry_set,
}
static AllMeshesInfo preprocess_meshes(const bke::GeometrySet &geometry_set,
const RealizeInstancesOptions &options)
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instances)
{
AllMeshesInfo info;
info.attributes = gather_generic_mesh_attributes_to_propagate(
geometry_set, options, info.create_id_attribute, info.create_material_index_attribute);
geometry_set,
options,
chosen_instances,
info.create_id_attribute,
info.create_material_index_attribute);
gather_meshes_to_realize(geometry_set, info.order);
for (const Mesh *mesh : info.order) {
@ -1337,7 +1343,7 @@ static AllMeshesInfo preprocess_meshes(const bke::GeometrySet &geometry_set,
return info;
}
static void execute_realize_mesh_task(const RealizeInstancesOptions &options,
static void execute_realize_mesh_task(bool keep_original_ids,
const RealizeMeshTask &task,
const OrderedAttributes &ordered_attributes,
MutableSpan<GSpanAttributeWriter> dst_attribute_writers,
@ -1421,7 +1427,7 @@ static void execute_realize_mesh_task(const RealizeInstancesOptions &options,
}
if (!all_dst_vertex_ids.is_empty()) {
create_result_ids(options,
create_result_ids(keep_original_ids,
mesh_info.stored_vertex_ids,
task.id,
all_dst_vertex_ids.slice(task.start_indices.vertex, mesh.verts_num));
@ -1449,7 +1455,7 @@ static void execute_realize_mesh_task(const RealizeInstancesOptions &options,
dst_attribute_writers);
}
static void execute_realize_mesh_tasks(const RealizeInstancesOptions &options,
static void execute_realize_mesh_tasks(bool keep_original_ids,
const AllMeshesInfo &all_meshes_info,
const Span<RealizeMeshTask> tasks,
const OrderedAttributes &ordered_attributes,
@ -1532,7 +1538,7 @@ static void execute_realize_mesh_tasks(const RealizeInstancesOptions &options,
threading::parallel_for(tasks.index_range(), 100, [&](const IndexRange task_range) {
for (const int task_index : task_range) {
const RealizeMeshTask &task = tasks[task_index];
execute_realize_mesh_task(options,
execute_realize_mesh_task(keep_original_ids,
task,
ordered_attributes,
dst_attribute_writers,
@ -1573,6 +1579,7 @@ static void execute_realize_mesh_tasks(const RealizeInstancesOptions &options,
static OrderedAttributes gather_generic_curve_attributes_to_propagate(
const bke::GeometrySet &in_geometry_set,
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instances,
bool &r_create_id)
{
Vector<bke::GeometryComponent::Type> src_component_types;
@ -1585,8 +1592,8 @@ static OrderedAttributes gather_generic_curve_attributes_to_propagate(
gather_attributes_for_propagation(in_geometry_set,
src_component_types,
bke::GeometryComponent::Type::Curve,
options.depths,
options.selection,
chosen_instances.depths,
chosen_instances.selection,
options.propagation_info,
attributes_to_propagate);
attributes_to_propagate.remove("position");
@ -1621,11 +1628,12 @@ static void gather_curves_to_realize(const bke::GeometrySet &geometry_set,
}
static AllCurvesInfo preprocess_curves(const bke::GeometrySet &geometry_set,
const RealizeInstancesOptions &options)
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instances)
{
AllCurvesInfo info;
info.attributes = gather_generic_curve_attributes_to_propagate(
geometry_set, options, info.create_id_attribute);
geometry_set, options, chosen_instances, info.create_id_attribute);
gather_curves_to_realize(geometry_set, info.order);
info.realize_info.reinitialize(info.order.size());
@ -1684,7 +1692,7 @@ static AllCurvesInfo preprocess_curves(const bke::GeometrySet &geometry_set,
return info;
}
static void execute_realize_curve_task(const RealizeInstancesOptions &options,
static void execute_realize_curve_task(bool keep_original_ids,
const AllCurvesInfo &all_curves_info,
const RealizeCurveTask &task,
const OrderedAttributes &ordered_attributes,
@ -1767,7 +1775,7 @@ static void execute_realize_curve_task(const RealizeInstancesOptions &options,
if (!all_dst_ids.is_empty()) {
create_result_ids(
options, curves_info.stored_ids, task.id, all_dst_ids.slice(dst_point_range));
keep_original_ids, curves_info.stored_ids, task.id, all_dst_ids.slice(dst_point_range));
}
copy_generic_attributes_to_result(
@ -1788,7 +1796,7 @@ static void execute_realize_curve_task(const RealizeInstancesOptions &options,
dst_attribute_writers);
}
static void execute_realize_curve_tasks(const RealizeInstancesOptions &options,
static void execute_realize_curve_tasks(bool keep_original_ids,
const AllCurvesInfo &all_curves_info,
const Span<RealizeCurveTask> tasks,
const OrderedAttributes &ordered_attributes,
@ -1867,7 +1875,7 @@ static void execute_realize_curve_tasks(const RealizeInstancesOptions &options,
threading::parallel_for(tasks.index_range(), 100, [&](const IndexRange task_range) {
for (const int task_index : task_range) {
const RealizeCurveTask &task = tasks[task_index];
execute_realize_curve_task(options,
execute_realize_curve_task(keep_original_ids,
all_curves_info,
task,
ordered_attributes,
@ -1947,6 +1955,23 @@ static void propagate_instances_to_keep(
bke::GeometrySet realize_instances(bke::GeometrySet geometry_set,
const RealizeInstancesOptions &options)
{
if (!geometry_set.has_instances()) {
return geometry_set;
}
SpecificInstancesChoice all_instances;
all_instances.depths = VArray<int>::ForSingle(SpecificInstancesChoice::MAX_DEPTH,
geometry_set.get_instances()->instances_num());
IndexMaskMemory memory;
all_instances.selection = IndexMask::from_bools(
VArray<bool>::ForSingle(true, geometry_set.get_instances()->instances_num()), memory);
return realize_instances(geometry_set, options, all_instances);
}
bke::GeometrySet realize_instances(bke::GeometrySet geometry_set,
const RealizeInstancesOptions &options,
const SpecificInstancesChoice &chosen_instances)
{
/* The algorithm works in three steps:
* 1. Preprocess each unique geometry that is instanced (e.g. each `Mesh`).
@ -1961,18 +1986,18 @@ bke::GeometrySet realize_instances(bke::GeometrySet geometry_set,
bke::GeometrySet not_to_realize_set;
propagate_instances_to_keep(
geometry_set, options.selection, not_to_realize_set, options.propagation_info);
geometry_set, chosen_instances.selection, not_to_realize_set, options.propagation_info);
if (options.keep_original_ids) {
remove_id_attribute_from_instances(geometry_set);
}
AllPointCloudsInfo all_pointclouds_info = preprocess_pointclouds(geometry_set, options);
AllMeshesInfo all_meshes_info = preprocess_meshes(geometry_set, options);
AllCurvesInfo all_curves_info = preprocess_curves(geometry_set, options);
bool tmp = true;
AllPointCloudsInfo all_pointclouds_info = preprocess_pointclouds(
geometry_set, options, chosen_instances);
AllMeshesInfo all_meshes_info = preprocess_meshes(geometry_set, options, chosen_instances);
AllCurvesInfo all_curves_info = preprocess_curves(geometry_set, options, chosen_instances);
OrderedAttributes all_instance_attributes = gather_generic_instance_attributes_to_propagate(
geometry_set, options, tmp);
geometry_set, options, chosen_instances);
Vector<std::unique_ptr<GArray<>>> temporary_arrays;
const bool create_id_attribute = all_pointclouds_info.create_id_attribute ||
@ -1983,8 +2008,8 @@ bke::GeometrySet realize_instances(bke::GeometrySet geometry_set,
all_curves_info,
all_instance_attributes,
create_id_attribute,
options.selection,
options.depths,
chosen_instances.selection,
chosen_instances.depths,
temporary_arrays};
bke::GeometrySet new_geometry_set;
@ -1999,25 +2024,33 @@ bke::GeometrySet realize_instances(bke::GeometrySet geometry_set,
gather_info.instances.attribute_fallback.append((gather_info.instances_attriubutes.size()));
}
gather_realize_tasks_recursive(gather_info, 0, -1, geometry_set, transform, attribute_fallbacks);
gather_realize_tasks_recursive(gather_info,
0,
SpecificInstancesChoice::MAX_DEPTH,
geometry_set,
transform,
attribute_fallbacks);
execute_instances_tasks(gather_info.instances.instances_components_to_merge,
gather_info.instances.instances_components_transforms,
all_instance_attributes,
gather_info.instances.attribute_fallback,
new_geometry_set);
execute_realize_pointcloud_tasks(options,
execute_realize_pointcloud_tasks(options.keep_original_ids,
all_pointclouds_info,
gather_info.r_tasks.pointcloud_tasks,
all_pointclouds_info.attributes,
new_geometry_set);
execute_realize_mesh_tasks(options,
execute_realize_mesh_tasks(options.keep_original_ids,
all_meshes_info,
gather_info.r_tasks.mesh_tasks,
all_meshes_info.attributes,
all_meshes_info.materials,
new_geometry_set);
execute_realize_curve_tasks(options,
execute_realize_curve_tasks(options.keep_original_ids,
all_curves_info,
gather_info.r_tasks.curve_tasks,
all_curves_info.attributes,

33
source/blender/nodes/geometry/nodes/node_geo_realize_instances.cc
View File

@ -19,13 +19,13 @@ static void node_declare(NodeDeclarationBuilder &b)
.default_value(true)
.hide_value()
.supports_field()
.description(("Which top-level instances to realize"));
.description("Which top-level instances to realize");
b.add_input<decl::Bool>("Realize All")
.default_value(true)
.supports_field()
.description(("Determine wether to realize nested instances completly"));
.description("Determine wether to realize nested instances completly");
b.add_input<decl::Int>("Depth").default_value(0).min(0).supports_field().description(
("Number of levels of nested instances to realize for each top-level instance"));
"Number of levels of nested instances to realize for each top-level instance");
b.add_output<decl::Geometry>("Geometry").propagate_all();
}
@ -36,6 +36,7 @@ static void node_geo_exec(GeoNodeExecParams params)
params.set_output("Geometry", std::move(geometry_set));
return;
}
GeometryComponentEditData::remember_deformed_positions_if_necessary(geometry_set);
Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
Field<bool> realize_all_filed = params.extract_input<Field<bool>>("Realize All");
@ -43,35 +44,35 @@ static void node_geo_exec(GeoNodeExecParams params)
static auto depth_override = mf::build::SI2_SO<int, bool, int>(
"depth_override",
[](int value, bool realize) { return realize ? -1 : std::max(value, 0); },
[](int value, bool realize) { return realize ? -1 : value; },
mf::build::exec_presets::AllSpanOrSingle());
static auto selction_override = mf::build::SI2_SO<int, bool, bool>(
"selction_override",
static auto selection_override = mf::build::SI2_SO<int, bool, bool>(
"selection_override",
[](int value, bool selection) { return value == 0 ? false : selection; },
mf::build::exec_presets::AllSpanOrSingle());
const bke::Instances &instances = *geometry_set.get_instances();
const bke::InstancesFieldContext field_context{instances};
fn::FieldEvaluator evaluator{field_context, instances.instances_num()};
Field<int> depth_field_overrided(
FieldOperation::Create(depth_override, {depth_field, realize_all_filed}));
Field<bool> selection_field_overrided(
FieldOperation::Create(selction_override, {depth_field_overrided, selection_field}));
FieldOperation::Create(selection_override, {depth_field_overrided, selection_field}));
evaluator.add(depth_field_overrided);
const bke::Instances &instances = *geometry_set.get_instances();
const bke::InstancesFieldContext field_context(instances);
fn::FieldEvaluator evaluator(field_context, instances.instances_num());
const int evaluated_depth_index = evaluator.add(depth_field_overrided);
evaluator.set_selection(selection_field_overrided);
evaluator.evaluate();
const VArray<int> depths = evaluator.get_evaluated<int>(0);
const IndexMask selection = evaluator.get_evaluated_selection_as_mask();
geometry::SpecificInstancesChoice chosen_instances;
chosen_instances.depths = evaluator.get_evaluated<int>(evaluated_depth_index);
chosen_instances.selection = evaluator.get_evaluated_selection_as_mask();
geometry::RealizeInstancesOptions options;
options.keep_original_ids = false;
options.realize_instance_attributes = true;
options.propagation_info = params.get_output_propagation_info("Geometry");
options.depths = depths;
options.selection = selection;
geometry_set = geometry::realize_instances(geometry_set, options);
params.set_output("Geometry", std::move(geometry_set));
}