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tornavis/source/blender/blenkernel/intern/geometry_fields.cc

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/* SPDX-FileCopyrightText: 2023 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BLI_array_utils.hh"
#include "BKE_attribute.hh"
#include "BKE_curves.hh"
#include "BKE_geometry_fields.hh"
#include "BKE_geometry_set.hh"
#include "BKE_grease_pencil.hh"
#include "BKE_instances.hh"
#include "BKE_mesh.hh"
#include "BKE_pointcloud.h"
#include "BKE_type_conversions.hh"
#include "DNA_mesh_types.h"
#include "DNA_pointcloud_types.h"
#include "BLT_translation.h"
#include <fmt/format.h>
namespace blender::bke {
MeshFieldContext::MeshFieldContext(const Mesh &mesh, const eAttrDomain domain)
: mesh_(mesh), domain_(domain)
{
BLI_assert(mesh.attributes().domain_supported(domain_));
}
CurvesFieldContext::CurvesFieldContext(const CurvesGeometry &curves, const eAttrDomain domain)
: curves_(curves), domain_(domain)
{
BLI_assert(curves.attributes().domain_supported(domain));
}
GVArray GreasePencilLayerFieldContext::get_varray_for_input(const fn::FieldInput &field_input,
const IndexMask &mask,
ResourceScope &scope) const
{
if (const CurvesFieldInput *curves_field_input = dynamic_cast<const CurvesFieldInput *>(
&field_input))
{
if (const bke::greasepencil::Drawing *drawing =
bke::greasepencil::get_eval_grease_pencil_layer_drawing(this->grease_pencil(),
this->layer_index()))
{
if (drawing->strokes().attributes().domain_supported(this->domain())) {
const CurvesFieldContext context{drawing->strokes(), this->domain()};
return curves_field_input->get_varray_for_context(context, mask, scope);
}
}
return {};
}
return field_input.get_varray_for_context(*this, mask, scope);
}
GeometryFieldContext::GeometryFieldContext(const GeometryFieldContext &other,
const eAttrDomain domain)
: geometry_(other.geometry_),
type_(other.type_),
domain_(domain),
grease_pencil_layer_index_(other.grease_pencil_layer_index_)
{
}
GeometryFieldContext::GeometryFieldContext(const void *geometry,
const GeometryComponent::Type type,
const eAttrDomain domain,
const int grease_pencil_layer_index)
: geometry_(geometry),
type_(type),
domain_(domain),
grease_pencil_layer_index_(grease_pencil_layer_index)
{
BLI_assert(ELEM(type,
GeometryComponent::Type::Mesh,
GeometryComponent::Type::Curve,
GeometryComponent::Type::PointCloud,
GeometryComponent::Type::GreasePencil,
GeometryComponent::Type::Instance));
}
GeometryFieldContext::GeometryFieldContext(const GeometryComponent &component,
const eAttrDomain domain)
: type_(component.type()), domain_(domain)
{
switch (component.type()) {
case GeometryComponent::Type::Mesh: {
const MeshComponent &mesh_component = static_cast<const MeshComponent &>(component);
geometry_ = mesh_component.get();
break;
}
case GeometryComponent::Type::Curve: {
const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
const Curves *curves = curve_component.get();
geometry_ = curves ? &curves->geometry.wrap() : nullptr;
break;
}
case GeometryComponent::Type::PointCloud: {
const PointCloudComponent &pointcloud_component = static_cast<const PointCloudComponent &>(
component);
geometry_ = pointcloud_component.get();
break;
}
case GeometryComponent::Type::GreasePencil: {
const GreasePencilComponent &grease_pencil_component =
static_cast<const GreasePencilComponent &>(component);
geometry_ = grease_pencil_component.get();
/* Need to use another constructor for other domains. */
BLI_assert(domain == ATTR_DOMAIN_LAYER);
break;
}
case GeometryComponent::Type::Instance: {
const InstancesComponent &instances_component = static_cast<const InstancesComponent &>(
component);
geometry_ = instances_component.get();
break;
}
case GeometryComponent::Type::Volume:
case GeometryComponent::Type::Edit:
BLI_assert_unreachable();
break;
}
}
GeometryFieldContext::GeometryFieldContext(const Mesh &mesh, eAttrDomain domain)
: geometry_(&mesh), type_(GeometryComponent::Type::Mesh), domain_(domain)
{
}
GeometryFieldContext::GeometryFieldContext(const CurvesGeometry &curves, eAttrDomain domain)
: geometry_(&curves), type_(GeometryComponent::Type::Curve), domain_(domain)
{
}
GeometryFieldContext::GeometryFieldContext(const PointCloud &points)
: geometry_(&points), type_(GeometryComponent::Type::PointCloud), domain_(ATTR_DOMAIN_POINT)
{
}
GeometryFieldContext::GeometryFieldContext(const GreasePencil &grease_pencil)
: geometry_(&grease_pencil),
type_(GeometryComponent::Type::GreasePencil),
domain_(ATTR_DOMAIN_LAYER)
{
}
GeometryFieldContext::GeometryFieldContext(const GreasePencil &grease_pencil,
const eAttrDomain domain,
const int layer_index)
: geometry_(&grease_pencil),
type_(GeometryComponent::Type::GreasePencil),
domain_(domain),
grease_pencil_layer_index_(layer_index)
{
}
GeometryFieldContext::GeometryFieldContext(const Instances &instances)
: geometry_(&instances),
type_(GeometryComponent::Type::Instance),
domain_(ATTR_DOMAIN_INSTANCE)
{
}
std::optional<AttributeAccessor> GeometryFieldContext::attributes() const
{
if (const Mesh *mesh = this->mesh()) {
return mesh->attributes();
}
if (const CurvesGeometry *curves = this->curves()) {
return curves->attributes();
}
if (const PointCloud *pointcloud = this->pointcloud()) {
return pointcloud->attributes();
}
if (const GreasePencil *grease_pencil = this->grease_pencil()) {
if (domain_ == ATTR_DOMAIN_LAYER) {
return grease_pencil->attributes();
}
else if (const greasepencil::Drawing *drawing =
greasepencil::get_eval_grease_pencil_layer_drawing(*grease_pencil,
grease_pencil_layer_index_))
{
return drawing->strokes().attributes();
}
}
if (const Instances *instances = this->instances()) {
return instances->attributes();
}
return {};
}
const Mesh *GeometryFieldContext::mesh() const
{
return this->type() == GeometryComponent::Type::Mesh ? static_cast<const Mesh *>(geometry_) :
nullptr;
}
const CurvesGeometry *GeometryFieldContext::curves() const
{
return this->type() == GeometryComponent::Type::Curve ?
static_cast<const CurvesGeometry *>(geometry_) :
nullptr;
}
const PointCloud *GeometryFieldContext::pointcloud() const
{
return this->type() == GeometryComponent::Type::PointCloud ?
static_cast<const PointCloud *>(geometry_) :
nullptr;
}
const GreasePencil *GeometryFieldContext::grease_pencil() const
{
return this->type() == GeometryComponent::Type::GreasePencil ?
static_cast<const GreasePencil *>(geometry_) :
nullptr;
}
const greasepencil::Drawing *GeometryFieldContext::grease_pencil_layer_drawing() const
{
if (!(this->type() == GeometryComponent::Type::GreasePencil) ||
!ELEM(domain_, ATTR_DOMAIN_CURVE, ATTR_DOMAIN_POINT))
{
return nullptr;
}
return greasepencil::get_eval_grease_pencil_layer_drawing(*this->grease_pencil(),
this->grease_pencil_layer_index_);
}
const CurvesGeometry *GeometryFieldContext::curves_or_strokes() const
{
if (const CurvesGeometry *curves = this->curves()) {
return curves;
}
if (const greasepencil::Drawing *drawing = this->grease_pencil_layer_drawing()) {
return &drawing->strokes();
}
return nullptr;
}
const Instances *GeometryFieldContext::instances() const
{
return this->type() == GeometryComponent::Type::Instance ?
static_cast<const Instances *>(geometry_) :
nullptr;
}
GVArray GeometryFieldInput::get_varray_for_context(const fn::FieldContext &context,
const IndexMask &mask,
ResourceScope & /*scope*/) const
{
if (const GeometryFieldContext *geometry_context = dynamic_cast<const GeometryFieldContext *>(
&context))
{
return this->get_varray_for_context(*geometry_context, mask);
}
if (const MeshFieldContext *mesh_context = dynamic_cast<const MeshFieldContext *>(&context)) {
return this->get_varray_for_context({mesh_context->mesh(), mesh_context->domain()}, mask);
}
if (const CurvesFieldContext *curve_context = dynamic_cast<const CurvesFieldContext *>(&context))
{
return this->get_varray_for_context({curve_context->curves(), curve_context->domain()}, mask);
}
if (const PointCloudFieldContext *point_context = dynamic_cast<const PointCloudFieldContext *>(
&context))
{
return this->get_varray_for_context({point_context->pointcloud()}, mask);
}
if (const GreasePencilFieldContext *grease_pencil_context =
dynamic_cast<const GreasePencilFieldContext *>(&context))
{
return this->get_varray_for_context({grease_pencil_context->grease_pencil()}, mask);
}
if (const GreasePencilLayerFieldContext *grease_pencil_context =
dynamic_cast<const GreasePencilLayerFieldContext *>(&context))
{
return this->get_varray_for_context({grease_pencil_context->grease_pencil(),
grease_pencil_context->domain(),
grease_pencil_context->layer_index()},
mask);
}
if (const InstancesFieldContext *instances_context = dynamic_cast<const InstancesFieldContext *>(
&context))
{
return this->get_varray_for_context({instances_context->instances()}, mask);
}
return {};
}
std::optional<eAttrDomain> GeometryFieldInput::preferred_domain(
const GeometryComponent & /*component*/) const
{
return std::nullopt;
}
GVArray MeshFieldInput::get_varray_for_context(const fn::FieldContext &context,
const IndexMask &mask,
ResourceScope & /*scope*/) const
{
if (const GeometryFieldContext *geometry_context = dynamic_cast<const GeometryFieldContext *>(
&context))
{
if (const Mesh *mesh = geometry_context->mesh()) {
return this->get_varray_for_context(*mesh, geometry_context->domain(), mask);
}
}
if (const MeshFieldContext *mesh_context = dynamic_cast<const MeshFieldContext *>(&context)) {
return this->get_varray_for_context(mesh_context->mesh(), mesh_context->domain(), mask);
}
return {};
}
std::optional<eAttrDomain> MeshFieldInput::preferred_domain(const Mesh & /*mesh*/) const
{
return std::nullopt;
}
GVArray CurvesFieldInput::get_varray_for_context(const fn::FieldContext &context,
const IndexMask &mask,
ResourceScope & /*scope*/) const
{
if (const GeometryFieldContext *geometry_context = dynamic_cast<const GeometryFieldContext *>(
&context))
{
if (const CurvesGeometry *curves = geometry_context->curves_or_strokes()) {
return this->get_varray_for_context(*curves, geometry_context->domain(), mask);
}
}
if (const CurvesFieldContext *curves_context = dynamic_cast<const CurvesFieldContext *>(
&context)) {
return this->get_varray_for_context(curves_context->curves(), curves_context->domain(), mask);
}
return {};
}
std::optional<eAttrDomain> CurvesFieldInput::preferred_domain(
const CurvesGeometry & /*curves*/) const
{
return std::nullopt;
}
GVArray PointCloudFieldInput::get_varray_for_context(const fn::FieldContext &context,
const IndexMask &mask,
ResourceScope & /*scope*/) const
{
if (const GeometryFieldContext *geometry_context = dynamic_cast<const GeometryFieldContext *>(
&context))
{
if (const PointCloud *pointcloud = geometry_context->pointcloud()) {
return this->get_varray_for_context(*pointcloud, mask);
}
}
if (const PointCloudFieldContext *point_context = dynamic_cast<const PointCloudFieldContext *>(
&context))
{
return this->get_varray_for_context(point_context->pointcloud(), mask);
}
return {};
}
GVArray InstancesFieldInput::get_varray_for_context(const fn::FieldContext &context,
const IndexMask &mask,
ResourceScope & /*scope*/) const
{
if (const GeometryFieldContext *geometry_context = dynamic_cast<const GeometryFieldContext *>(
&context))
{
if (const Instances *instances = geometry_context->instances()) {
return this->get_varray_for_context(*instances, mask);
}
}
if (const InstancesFieldContext *instances_context = dynamic_cast<const InstancesFieldContext *>(
&context))
{
return this->get_varray_for_context(instances_context->instances(), mask);
}
return {};
}
GVArray AttributeFieldInput::get_varray_for_context(const GeometryFieldContext &context,
const IndexMask & /*mask*/) const
{
const eCustomDataType data_type = cpp_type_to_custom_data_type(*type_);
const eAttrDomain domain = context.domain();
if (const GreasePencil *grease_pencil = context.grease_pencil()) {
const AttributeAccessor layer_attributes = grease_pencil->attributes();
if (domain == ATTR_DOMAIN_LAYER) {
return *layer_attributes.lookup(name_, data_type);
}
else if (ELEM(domain, ATTR_DOMAIN_POINT, ATTR_DOMAIN_CURVE)) {
const int layer_index = context.grease_pencil_layer_index();
const AttributeAccessor curves_attributes = *context.attributes();
if (const GAttributeReader reader = curves_attributes.lookup(name_, domain, data_type)) {
return *reader;
}
/* Lookup attribute on the layer domain if it does not exist on points or curves. */
if (const GAttributeReader reader = layer_attributes.lookup(name_)) {
const CPPType &cpp_type = reader.varray.type();
BUFFER_FOR_CPP_TYPE_VALUE(cpp_type, value);
BLI_SCOPED_DEFER([&]() { cpp_type.destruct(value); });
reader.varray.get_to_uninitialized(layer_index, value);
const int domain_size = curves_attributes.domain_size(domain);
return GVArray::ForSingle(cpp_type, domain_size, value);
}
}
}
else if (auto attributes = context.attributes()) {
return *attributes->lookup(name_, domain, data_type);
}
return {};
}
GVArray AttributeExistsFieldInput::get_varray_for_context(const bke::GeometryFieldContext &context,
const IndexMask & /*mask*/) const
{
const bool exists = context.attributes()->contains(name_);
const int domain_size = context.attributes()->domain_size(context.domain());
return VArray<bool>::ForSingle(exists, domain_size);
}
std::string AttributeFieldInput::socket_inspection_name() const
{
return fmt::format(TIP_("\"{}\" attribute from geometry"), name_);
}
uint64_t AttributeFieldInput::hash() const
{
return get_default_hash_2(name_, type_);
}
bool AttributeFieldInput::is_equal_to(const fn::FieldNode &other) const
{
if (const AttributeFieldInput *other_typed = dynamic_cast<const AttributeFieldInput *>(&other)) {
return name_ == other_typed->name_ && type_ == other_typed->type_;
}
return false;
}
std::optional<eAttrDomain> AttributeFieldInput::preferred_domain(
const GeometryComponent &component) const
{
const std::optional<AttributeAccessor> attributes = component.attributes();
if (!attributes.has_value()) {
return std::nullopt;
}
const std::optional<AttributeMetaData> meta_data = attributes->lookup_meta_data(name_);
if (!meta_data.has_value()) {
return std::nullopt;
}
return meta_data->domain;
}
static StringRef get_random_id_attribute_name(const eAttrDomain domain)
{
switch (domain) {
case ATTR_DOMAIN_POINT:
case ATTR_DOMAIN_INSTANCE:
return "id";
default:
return "";
}
}
GVArray IDAttributeFieldInput::get_varray_for_context(const GeometryFieldContext &context,
const IndexMask &mask) const
{
const StringRef name = get_random_id_attribute_name(context.domain());
if (auto attributes = context.attributes()) {
if (GVArray attribute = *attributes->lookup(name, context.domain(), CD_PROP_INT32)) {
return attribute;
}
}
/* Use the index as the fallback if no random ID attribute exists. */
return fn::IndexFieldInput::get_index_varray(mask);
}
std::string IDAttributeFieldInput::socket_inspection_name() const
{
return TIP_("ID / Index");
}
uint64_t IDAttributeFieldInput::hash() const
{
/* All random ID attribute inputs are the same within the same evaluation context. */
return 92386459827;
}
bool IDAttributeFieldInput::is_equal_to(const fn::FieldNode &other) const
{
/* All random ID attribute inputs are the same within the same evaluation context. */
return dynamic_cast<const IDAttributeFieldInput *>(&other) != nullptr;
}
GVArray AnonymousAttributeFieldInput::get_varray_for_context(const GeometryFieldContext &context,
const IndexMask & /*mask*/) const
{
const eCustomDataType data_type = cpp_type_to_custom_data_type(*type_);
return *context.attributes()->lookup(*anonymous_id_, context.domain(), data_type);
}
std::string AnonymousAttributeFieldInput::socket_inspection_name() const
{
return fmt::format(TIP_("\"{}\" from {}"), TIP_(debug_name_.c_str()), producer_name_);
}
uint64_t AnonymousAttributeFieldInput::hash() const
{
return get_default_hash_2(anonymous_id_.get(), type_);
}
bool AnonymousAttributeFieldInput::is_equal_to(const fn::FieldNode &other) const
{
if (const AnonymousAttributeFieldInput *other_typed =
dynamic_cast<const AnonymousAttributeFieldInput *>(&other))
{
return anonymous_id_.get() == other_typed->anonymous_id_.get() && type_ == other_typed->type_;
}
return false;
}
std::optional<eAttrDomain> AnonymousAttributeFieldInput::preferred_domain(
const GeometryComponent &component) const
{
const std::optional<AttributeAccessor> attributes = component.attributes();
if (!attributes.has_value()) {
return std::nullopt;
}
const std::optional<AttributeMetaData> meta_data = attributes->lookup_meta_data(*anonymous_id_);
if (!meta_data.has_value()) {
return std::nullopt;
}
return meta_data->domain;
}
GVArray NamedLayerSelectionFieldInput::get_varray_for_context(
const bke::GeometryFieldContext &context, const IndexMask &mask) const
{
using namespace bke::greasepencil;
const eAttrDomain domain = context.domain();
if (!ELEM(domain, ATTR_DOMAIN_POINT, ATTR_DOMAIN_CURVE, ATTR_DOMAIN_LAYER)) {
return {};
}
const GreasePencil &grease_pencil = *context.grease_pencil();
if (!context.grease_pencil()) {
return {};
}
IndexMaskMemory memory;
const IndexMask layer_indices = grease_pencil.layer_selection_by_name(layer_name_, memory);
if (layer_indices.is_empty()) {
return {};
}
if (domain == ATTR_DOMAIN_LAYER) {
Array<bool> selection(mask.min_array_size());
layer_indices.to_bools(selection);
return VArray<bool>::ForContainer(std::move(selection));
}
if (!layer_indices.contains(context.grease_pencil_layer_index())) {
return {};
}
return VArray<bool>::ForSingle(true, mask.min_array_size());
}
uint64_t NamedLayerSelectionFieldInput::hash() const
{
return get_default_hash_2(layer_name_, type_);
}
bool NamedLayerSelectionFieldInput::is_equal_to(const fn::FieldNode &other) const
{
if (const NamedLayerSelectionFieldInput *other_named_layer =
dynamic_cast<const NamedLayerSelectionFieldInput *>(&other))
{
return layer_name_ == other_named_layer->layer_name_;
}
return false;
}
std::optional<eAttrDomain> NamedLayerSelectionFieldInput::preferred_domain(
const bke::GeometryComponent & /*component*/) const
{
return ATTR_DOMAIN_LAYER;
}
} // namespace blender::bke
/* -------------------------------------------------------------------- */
/** \name Mesh and Curve Normals Field Input
* \{ */
namespace blender::bke {
GVArray NormalFieldInput::get_varray_for_context(const GeometryFieldContext &context,
const IndexMask &mask) const
{
if (const Mesh *mesh = context.mesh()) {
return mesh_normals_varray(*mesh, mask, context.domain());
}
if (const CurvesGeometry *curves = context.curves_or_strokes()) {
return curve_normals_varray(*curves, context.domain());
}
return {};
}
std::string NormalFieldInput::socket_inspection_name() const
{
return TIP_("Normal");
}
uint64_t NormalFieldInput::hash() const
{
return 213980475983;
}
bool NormalFieldInput::is_equal_to(const fn::FieldNode &other) const
{
return dynamic_cast<const NormalFieldInput *>(&other) != nullptr;
}
static std::optional<AttributeIDRef> try_get_field_direct_attribute_id(const fn::GField &any_field)
{
if (const auto *field = dynamic_cast<const AttributeFieldInput *>(&any_field.node())) {
return field->attribute_name();
}
if (const auto *field = dynamic_cast<const AnonymousAttributeFieldInput *>(&any_field.node())) {
return *field->anonymous_id();
}
return {};
}
static bool attribute_kind_matches(const AttributeMetaData meta_data,
const eAttrDomain domain,
const eCustomDataType data_type)
{
return meta_data.domain == domain && meta_data.data_type == data_type;
}
/**
* Some fields reference attributes directly. When the referenced attribute has the requested type
* and domain, use implicit sharing to avoid duplication when creating the captured attribute.
*/
static bool try_add_shared_field_attribute(MutableAttributeAccessor attributes,
const AttributeIDRef &id_to_create,
const eAttrDomain domain,
const fn::GField &field)
{
const std::optional<AttributeIDRef> field_id = try_get_field_direct_attribute_id(field);
if (!field_id) {
return false;
}
const std::optional<AttributeMetaData> meta_data = attributes.lookup_meta_data(*field_id);
if (!meta_data) {
return false;
}
const eCustomDataType data_type = bke::cpp_type_to_custom_data_type(field.cpp_type());
if (!attribute_kind_matches(*meta_data, domain, data_type)) {
/* Avoid costly domain and type interpolation, which would make sharing impossible. */
return false;
}
const GAttributeReader attribute = attributes.lookup(*field_id, domain, data_type);
if (!attribute.sharing_info || !attribute.varray.is_span()) {
return false;
}
const AttributeInitShared init(attribute.varray.get_internal_span().data(),
*attribute.sharing_info);
return attributes.add(id_to_create, domain, data_type, init);
}
static bool try_capture_field_on_geometry(MutableAttributeAccessor attributes,
const GeometryFieldContext &field_context,
const AttributeIDRef &attribute_id,
const eAttrDomain domain,
const fn::Field<bool> &selection,
const fn::GField &field)
{
const int domain_size = attributes.domain_size(domain);
const CPPType &type = field.cpp_type();
const eCustomDataType data_type = bke::cpp_type_to_custom_data_type(type);
if (domain_size == 0) {
return attributes.add(attribute_id, domain, data_type, AttributeInitConstruct{});
}
const bke::AttributeValidator validator = attributes.lookup_validator(attribute_id);
const std::optional<AttributeMetaData> meta_data = attributes.lookup_meta_data(attribute_id);
const bool attribute_matches = meta_data &&
attribute_kind_matches(*meta_data, domain, data_type);
/* We are writing to an attribute that exists already with the correct domain and type. */
if (attribute_matches) {
if (GSpanAttributeWriter dst_attribute = attributes.lookup_for_write_span(attribute_id)) {
fn::FieldEvaluator evaluator{field_context, domain_size};
evaluator.add(validator.validate_field_if_necessary(field));
evaluator.set_selection(selection);
evaluator.evaluate();
const IndexMask selection = evaluator.get_evaluated_selection_as_mask();
array_utils::copy(evaluator.get_evaluated(0), selection, dst_attribute.span);
dst_attribute.finish();
return true;
}
}
const bool selection_is_full = !selection.node().depends_on_input() &&
fn::evaluate_constant_field(selection);
if (!validator && selection_is_full) {
if (try_add_shared_field_attribute(attributes, attribute_id, domain, field)) {
return true;
}
}
/* Could avoid allocating a new buffer if:
* - The field does not depend on that attribute (we can't easily check for that yet). */
void *buffer = MEM_mallocN_aligned(type.size() * domain_size, type.alignment(), __func__);
if (!selection_is_full) {
type.value_initialize_n(buffer, domain_size);
}
fn::FieldEvaluator evaluator{field_context, domain_size};
evaluator.add_with_destination(validator.validate_field_if_necessary(field),
GMutableSpan{type, buffer, domain_size});
evaluator.set_selection(selection);
evaluator.evaluate();
if (attribute_matches) {
if (GAttributeWriter attribute = attributes.lookup_for_write(attribute_id)) {
attribute.varray.set_all(buffer);
attribute.finish();
type.destruct_n(buffer, domain_size);
MEM_freeN(buffer);
return true;
}
}
attributes.remove(attribute_id);
if (attributes.add(attribute_id, domain, data_type, bke::AttributeInitMoveArray(buffer))) {
return true;
}
/* If the name corresponds to a builtin attribute, removing the attribute might fail if
* it's required, and adding the attribute might fail if the domain or type is incorrect. */
type.destruct_n(buffer, domain_size);
MEM_freeN(buffer);
return false;
}
bool try_capture_field_on_geometry(GeometryComponent &component,
const AttributeIDRef &attribute_id,
const eAttrDomain domain,
const fn::Field<bool> &selection,
const fn::GField &field)
{
if (component.type() == GeometryComponent::Type::GreasePencil &&
ELEM(domain, ATTR_DOMAIN_POINT, ATTR_DOMAIN_CURVE))
{
/* Capture the field on every layer individually. */
auto &grease_pencil_component = static_cast<GreasePencilComponent &>(component);
GreasePencil *grease_pencil = grease_pencil_component.get_for_write();
if (grease_pencil == nullptr) {
return false;
}
bool any_success = false;
threading::parallel_for(grease_pencil->layers().index_range(), 8, [&](const IndexRange range) {
for (const int layer_index : range) {
if (greasepencil::Drawing *drawing =
greasepencil::get_eval_grease_pencil_layer_drawing_for_write(*grease_pencil,
layer_index))
{
const GeometryFieldContext field_context{*grease_pencil, domain, layer_index};
const bool success = try_capture_field_on_geometry(
drawing->strokes_for_write().attributes_for_write(),
field_context,
attribute_id,
domain,
selection,
field);
if (success & !any_success) {
any_success = true;
}
}
}
});
return any_success;
}
MutableAttributeAccessor attributes = *component.attributes_for_write();
const GeometryFieldContext field_context{component, domain};
return try_capture_field_on_geometry(
attributes, field_context, attribute_id, domain, selection, field);
}
bool try_capture_field_on_geometry(GeometryComponent &component,
const AttributeIDRef &attribute_id,
const eAttrDomain domain,
const fn::GField &field)
{
const fn::Field<bool> selection = fn::make_constant_field<bool>(true);
return try_capture_field_on_geometry(component, attribute_id, domain, selection, field);
}
std::optional<eAttrDomain> try_detect_field_domain(const GeometryComponent &component,
const fn::GField &field)
{
const GeometryComponent::Type component_type = component.type();
if (component_type == GeometryComponent::Type::PointCloud) {
return ATTR_DOMAIN_POINT;
}
if (component_type == GeometryComponent::Type::GreasePencil) {
return ATTR_DOMAIN_LAYER;
}
if (component_type == GeometryComponent::Type::Instance) {
return ATTR_DOMAIN_INSTANCE;
}
const std::shared_ptr<const fn::FieldInputs> &field_inputs = field.node().field_inputs();
if (!field_inputs) {
return std::nullopt;
}
std::optional<eAttrDomain> output_domain;
auto handle_domain = [&](const std::optional<eAttrDomain> domain) {
if (!domain.has_value()) {
return false;
}
if (output_domain.has_value()) {
if (*output_domain != *domain) {
return false;
}
return true;
}
output_domain = domain;
return true;
};
if (component_type == GeometryComponent::Type::Mesh) {
const MeshComponent &mesh_component = static_cast<const MeshComponent &>(component);
const Mesh *mesh = mesh_component.get();
if (mesh == nullptr) {
return std::nullopt;
}
for (const fn::FieldInput &field_input : field_inputs->deduplicated_nodes) {
if (const auto *geometry_field_input = dynamic_cast<const GeometryFieldInput *>(
&field_input)) {
if (!handle_domain(geometry_field_input->preferred_domain(component))) {
return std::nullopt;
}
}
else if (const auto *mesh_field_input = dynamic_cast<const MeshFieldInput *>(&field_input)) {
if (!handle_domain(mesh_field_input->preferred_domain(*mesh))) {
return std::nullopt;
}
}
else {
return std::nullopt;
}
}
}
if (component_type == GeometryComponent::Type::Curve) {
const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
const Curves *curves = curve_component.get();
if (curves == nullptr) {
return std::nullopt;
}
for (const fn::FieldInput &field_input : field_inputs->deduplicated_nodes) {
if (const auto *geometry_field_input = dynamic_cast<const GeometryFieldInput *>(
&field_input)) {
if (!handle_domain(geometry_field_input->preferred_domain(component))) {
return std::nullopt;
}
}
else if (const auto *curves_field_input = dynamic_cast<const CurvesFieldInput *>(
&field_input)) {
if (!handle_domain(curves_field_input->preferred_domain(curves->geometry.wrap()))) {
return std::nullopt;
}
}
else {
return std::nullopt;
}
}
}
return output_domain;
}
} // namespace blender::bke
/** \} */
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