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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "BLI_map.hh"
#include "BLI_task.hh"
#include "BKE_attribute.h"
#include "BKE_attribute_access.hh"
#include "BKE_geometry_set.hh"
#include "BKE_lib_id.h"
#include "BKE_mesh.h"
#include "BKE_mesh_wrapper.h"
#include "BKE_modifier.h"
#include "BKE_pointcloud.h"
#include "BKE_spline.hh"
#include "BKE_volume.h"
#include "DNA_collection_types.h"
#include "DNA_object_types.h"
#include "BLI_rand.hh"
#include "MEM_guardedalloc.h"
using blender::float3;
using blender::float4x4;
using blender::Map;
using blender::MutableSpan;
using blender::Span;
using blender::StringRef;
using blender::Vector;
/* -------------------------------------------------------------------- */
/** \name Geometry Component
* \{ */
GeometryComponent::GeometryComponent(GeometryComponentType type) : type_(type)
{
}
GeometryComponent *GeometryComponent::create(GeometryComponentType component_type)
{
switch (component_type) {
case GEO_COMPONENT_TYPE_MESH:
return new MeshComponent();
case GEO_COMPONENT_TYPE_POINT_CLOUD:
return new PointCloudComponent();
case GEO_COMPONENT_TYPE_INSTANCES:
return new InstancesComponent();
case GEO_COMPONENT_TYPE_VOLUME:
return new VolumeComponent();
case GEO_COMPONENT_TYPE_CURVE:
return new CurveComponent();
}
BLI_assert_unreachable();
return nullptr;
}
void GeometryComponent::user_add() const
{
users_.fetch_add(1);
}
void GeometryComponent::user_remove() const
{
const int new_users = users_.fetch_sub(1) - 1;
if (new_users == 0) {
delete this;
}
}
bool GeometryComponent::is_mutable() const
{
/* If the item is shared, it is read-only. */
/* The user count can be 0, when this is called from the destructor. */
return users_ <= 1;
}
GeometryComponentType GeometryComponent::type() const
{
return type_;
}
bool GeometryComponent::is_empty() const
{
return false;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Geometry Set
* \{ */
GeometrySet::GeometrySet() = default;
GeometrySet::GeometrySet(const GeometrySet &other) = default;
GeometrySet::GeometrySet(GeometrySet &&other) = default;
GeometrySet::~GeometrySet() = default;
GeometrySet &GeometrySet::operator=(const GeometrySet &other) = default;
GeometrySet &GeometrySet::operator=(GeometrySet &&other) = default;
GeometryComponent &GeometrySet::get_component_for_write(GeometryComponentType component_type)
{
GeometryComponentPtr &component_ptr = components_[component_type];
if (!component_ptr) {
/* If the component did not exist before, create a new one. */
component_ptr = GeometryComponent::create(component_type);
return *component_ptr;
}
if (component_ptr->is_mutable()) {
/* If the referenced component is already mutable, return it directly. */
return *component_ptr;
}
/* If the referenced component is shared, make a copy. The copy is not shared and is
* therefore mutable. */
component_ptr = component_ptr->copy();
return *component_ptr;
}
GeometryComponent *GeometrySet::get_component_ptr(GeometryComponentType type)
{
if (this->has(type)) {
return &this->get_component_for_write(type);
}
return nullptr;
}
const GeometryComponent *GeometrySet::get_component_for_read(
GeometryComponentType component_type) const
{
return components_[component_type].get();
}
bool GeometrySet::has(const GeometryComponentType component_type) const
{
return components_[component_type].has_value();
}
void GeometrySet::remove(const GeometryComponentType component_type)
{
components_[component_type].reset();
}
void GeometrySet::keep_only(const blender::Span<GeometryComponentType> component_types)
{
for (GeometryComponentPtr &component_ptr : components_) {
if (component_ptr) {
if (!component_types.contains(component_ptr->type())) {
component_ptr.reset();
}
}
}
}
void GeometrySet::add(const GeometryComponent &component)
{
BLI_assert(!components_[component.type()]);
component.user_add();
components_[component.type()] = const_cast<GeometryComponent *>(&component);
}
Vector<const GeometryComponent *> GeometrySet::get_components_for_read() const
{
Vector<const GeometryComponent *> components;
for (const GeometryComponentPtr &component_ptr : components_) {
if (component_ptr) {
components.append(component_ptr.get());
}
}
return components;
}
bool GeometrySet::compute_boundbox_without_instances(float3 *r_min, float3 *r_max) const
{
bool have_minmax = false;
const PointCloud *pointcloud = this->get_pointcloud_for_read();
if (pointcloud != nullptr) {
have_minmax |= BKE_pointcloud_minmax(pointcloud, *r_min, *r_max);
}
const Mesh *mesh = this->get_mesh_for_read();
if (mesh != nullptr) {
have_minmax |= BKE_mesh_wrapper_minmax(mesh, *r_min, *r_max);
}
const Volume *volume = this->get_volume_for_read();
if (volume != nullptr) {
have_minmax |= BKE_volume_min_max(volume, *r_min, *r_max);
}
const CurveEval *curve = this->get_curve_for_read();
if (curve != nullptr) {
/* Using the evaluated positions is somewhat arbitrary, but it is probably expected. */
have_minmax |= curve->bounds_min_max(*r_min, *r_max, true);
}
return have_minmax;
}
std::ostream &operator<<(std::ostream &stream, const GeometrySet &geometry_set)
{
stream << "<GeometrySet at " << &geometry_set << ", " << geometry_set.components_.size()
<< " components>";
return stream;
}
void GeometrySet::clear()
{
for (GeometryComponentPtr &component_ptr : components_) {
component_ptr.reset();
}
}
void GeometrySet::ensure_owns_direct_data()
{
for (GeometryComponentPtr &component_ptr : components_) {
if (!component_ptr) {
continue;
}
if (component_ptr->owns_direct_data()) {
continue;
}
GeometryComponent &component_for_write = this->get_component_for_write(component_ptr->type());
component_for_write.ensure_owns_direct_data();
}
}
bool GeometrySet::owns_direct_data() const
{
for (const GeometryComponentPtr &component_ptr : components_) {
if (component_ptr) {
if (!component_ptr->owns_direct_data()) {
return false;
}
}
}
return true;
}
const Mesh *GeometrySet::get_mesh_for_read() const
{
const MeshComponent *component = this->get_component_for_read<MeshComponent>();
return (component == nullptr) ? nullptr : component->get_for_read();
}
bool GeometrySet::has_mesh() const
{
const MeshComponent *component = this->get_component_for_read<MeshComponent>();
return component != nullptr && component->has_mesh();
}
const PointCloud *GeometrySet::get_pointcloud_for_read() const
{
const PointCloudComponent *component = this->get_component_for_read<PointCloudComponent>();
return (component == nullptr) ? nullptr : component->get_for_read();
}
const Volume *GeometrySet::get_volume_for_read() const
{
const VolumeComponent *component = this->get_component_for_read<VolumeComponent>();
return (component == nullptr) ? nullptr : component->get_for_read();
}
const CurveEval *GeometrySet::get_curve_for_read() const
{
const CurveComponent *component = this->get_component_for_read<CurveComponent>();
return (component == nullptr) ? nullptr : component->get_for_read();
}
bool GeometrySet::has_pointcloud() const
{
const PointCloudComponent *component = this->get_component_for_read<PointCloudComponent>();
return component != nullptr && component->has_pointcloud();
}
bool GeometrySet::has_instances() const
{
const InstancesComponent *component = this->get_component_for_read<InstancesComponent>();
return component != nullptr && component->instances_amount() >= 1;
}
bool GeometrySet::has_volume() const
{
const VolumeComponent *component = this->get_component_for_read<VolumeComponent>();
return component != nullptr && component->has_volume();
}
bool GeometrySet::has_curve() const
{
const CurveComponent *component = this->get_component_for_read<CurveComponent>();
return component != nullptr && component->has_curve();
}
bool GeometrySet::has_realized_data() const
{
for (const GeometryComponentPtr &component_ptr : components_) {
if (component_ptr) {
if (component_ptr->type() != GEO_COMPONENT_TYPE_INSTANCES) {
return true;
}
}
}
return false;
}
bool GeometrySet::is_empty() const
{
return !(this->has_mesh() || this->has_curve() || this->has_pointcloud() || this->has_volume() ||
this->has_instances());
}
GeometrySet GeometrySet::create_with_mesh(Mesh *mesh, GeometryOwnershipType ownership)
{
GeometrySet geometry_set;
if (mesh != nullptr) {
MeshComponent &component = geometry_set.get_component_for_write<MeshComponent>();
component.replace(mesh, ownership);
}
return geometry_set;
}
GeometrySet GeometrySet::create_with_pointcloud(PointCloud *pointcloud,
GeometryOwnershipType ownership)
{
GeometrySet geometry_set;
if (pointcloud != nullptr) {
PointCloudComponent &component = geometry_set.get_component_for_write<PointCloudComponent>();
component.replace(pointcloud, ownership);
}
return geometry_set;
}
GeometrySet GeometrySet::create_with_curve(CurveEval *curve, GeometryOwnershipType ownership)
{
GeometrySet geometry_set;
if (curve != nullptr) {
CurveComponent &component = geometry_set.get_component_for_write<CurveComponent>();
component.replace(curve, ownership);
}
return geometry_set;
}
void GeometrySet::replace_mesh(Mesh *mesh, GeometryOwnershipType ownership)
{
if (mesh == nullptr) {
this->remove<MeshComponent>();
return;
}
if (mesh == this->get_mesh_for_read()) {
return;
}
this->remove<MeshComponent>();
MeshComponent &component = this->get_component_for_write<MeshComponent>();
component.replace(mesh, ownership);
}
void GeometrySet::replace_curve(CurveEval *curve, GeometryOwnershipType ownership)
{
if (curve == nullptr) {
this->remove<CurveComponent>();
return;
}
if (curve == this->get_curve_for_read()) {
return;
}
this->remove<CurveComponent>();
CurveComponent &component = this->get_component_for_write<CurveComponent>();
component.replace(curve, ownership);
}
void GeometrySet::replace_pointcloud(PointCloud *pointcloud, GeometryOwnershipType ownership)
{
if (pointcloud == nullptr) {
this->remove<PointCloudComponent>();
return;
}
if (pointcloud == this->get_pointcloud_for_read()) {
return;
}
this->remove<PointCloudComponent>();
PointCloudComponent &component = this->get_component_for_write<PointCloudComponent>();
component.replace(pointcloud, ownership);
}
void GeometrySet::replace_volume(Volume *volume, GeometryOwnershipType ownership)
{
if (volume == nullptr) {
this->remove<VolumeComponent>();
return;
}
if (volume == this->get_volume_for_read()) {
return;
}
this->remove<VolumeComponent>();
VolumeComponent &component = this->get_component_for_write<VolumeComponent>();
component.replace(volume, ownership);
}
Mesh *GeometrySet::get_mesh_for_write()
{
MeshComponent *component = this->get_component_ptr<MeshComponent>();
return component == nullptr ? nullptr : component->get_for_write();
}
PointCloud *GeometrySet::get_pointcloud_for_write()
{
PointCloudComponent *component = this->get_component_ptr<PointCloudComponent>();
return component == nullptr ? nullptr : component->get_for_write();
}
Volume *GeometrySet::get_volume_for_write()
{
VolumeComponent *component = this->get_component_ptr<VolumeComponent>();
return component == nullptr ? nullptr : component->get_for_write();
}
CurveEval *GeometrySet::get_curve_for_write()
{
CurveComponent *component = this->get_component_ptr<CurveComponent>();
return component == nullptr ? nullptr : component->get_for_write();
}
void GeometrySet::attribute_foreach(const Span<GeometryComponentType> component_types,
const bool include_instances,
const AttributeForeachCallback callback) const
{
using namespace blender;
using namespace blender::bke;
for (const GeometryComponentType component_type : component_types) {
if (!this->has(component_type)) {
continue;
}
const GeometryComponent &component = *this->get_component_for_read(component_type);
component.attribute_foreach(
[&](const AttributeIDRef &attribute_id, const AttributeMetaData &meta_data) {
callback(attribute_id, meta_data, component);
return true;
});
}
if (include_instances && this->has_instances()) {
const InstancesComponent &instances = *this->get_component_for_read<InstancesComponent>();
instances.foreach_referenced_geometry([&](const GeometrySet &instance_geometry_set) {
instance_geometry_set.attribute_foreach(component_types, include_instances, callback);
});
}
}
void GeometrySet::gather_attributes_for_propagation(
const Span<GeometryComponentType> component_types,
const GeometryComponentType dst_component_type,
bool include_instances,
blender::Map<blender::bke::AttributeIDRef, AttributeKind> &r_attributes) const
{
using namespace blender;
using namespace blender::bke;
/* Only needed right now to check if an attribute is built-in on this component type.
* TODO: Get rid of the dummy component. */
const GeometryComponent *dummy_component = GeometryComponent::create(dst_component_type);
this->attribute_foreach(
component_types,
include_instances,
[&](const AttributeIDRef &attribute_id,
const AttributeMetaData &meta_data,
const GeometryComponent &component) {
if (component.attribute_is_builtin(attribute_id)) {
if (!dummy_component->attribute_is_builtin(attribute_id)) {
/* Don't propagate built-in attributes that are not built-in on the destination
* component. */
return;
}
}
if (!attribute_id.should_be_kept()) {
return;
}
AttributeDomain domain = meta_data.domain;
if (dst_component_type != GEO_COMPONENT_TYPE_INSTANCES && domain == ATTR_DOMAIN_INSTANCE) {
domain = ATTR_DOMAIN_POINT;
}
auto add_info = [&](AttributeKind *attribute_kind) {
attribute_kind->domain = domain;
attribute_kind->data_type = meta_data.data_type;
};
auto modify_info = [&](AttributeKind *attribute_kind) {
attribute_kind->domain = bke::attribute_domain_highest_priority(
{attribute_kind->domain, domain});
attribute_kind->data_type = bke::attribute_data_type_highest_complexity(
{attribute_kind->data_type, meta_data.data_type});
};
r_attributes.add_or_modify(attribute_id, add_info, modify_info);
});
delete dummy_component;
}
static void gather_component_types_recursive(const GeometrySet &geometry_set,
const bool include_instances,
const bool ignore_empty,
Vector<GeometryComponentType> &r_types)
{
for (const GeometryComponent *component : geometry_set.get_components_for_read()) {
if (ignore_empty) {
if (component->is_empty()) {
continue;
}
}
r_types.append_non_duplicates(component->type());
}
if (!include_instances) {
return;
}
const InstancesComponent *instances = geometry_set.get_component_for_read<InstancesComponent>();
if (instances == nullptr) {
return;
}
instances->foreach_referenced_geometry([&](const GeometrySet &instance_geometry_set) {
gather_component_types_recursive(
instance_geometry_set, include_instances, ignore_empty, r_types);
});
}
blender::Vector<GeometryComponentType> GeometrySet::gather_component_types(
const bool include_instances, bool ignore_empty) const
{
Vector<GeometryComponentType> types;
gather_component_types_recursive(*this, include_instances, ignore_empty, types);
return types;
}
static void gather_mutable_geometry_sets(GeometrySet &geometry_set,
Vector<GeometrySet *> &r_geometry_sets)
{
r_geometry_sets.append(&geometry_set);
if (!geometry_set.has_instances()) {
return;
}
/* In the future this can be improved by deduplicating instance references across different
* instances. */
InstancesComponent &instances_component =
geometry_set.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);
gather_mutable_geometry_sets(instance_geometry, r_geometry_sets);
}
}
}
void GeometrySet::modify_geometry_sets(ForeachSubGeometryCallback callback)
{
Vector<GeometrySet *> geometry_sets;
gather_mutable_geometry_sets(*this, geometry_sets);
blender::threading::parallel_for_each(
geometry_sets, [&](GeometrySet *geometry_set) { callback(*geometry_set); });
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name C API
* \{ */
void BKE_geometry_set_free(GeometrySet *geometry_set)
{
delete geometry_set;
}
bool BKE_object_has_geometry_set_instances(const Object *ob)
{
const GeometrySet *geometry_set = ob->runtime.geometry_set_eval;
if (geometry_set == nullptr) {
return false;
}
for (const GeometryComponent *component : geometry_set->get_components_for_read()) {
if (component->is_empty()) {
continue;
}
const GeometryComponentType type = component->type();
bool is_instance = false;
switch (type) {
case GEO_COMPONENT_TYPE_MESH:
is_instance = ob->type != OB_MESH;
break;
case GEO_COMPONENT_TYPE_POINT_CLOUD:
is_instance = ob->type != OB_POINTCLOUD;
break;
case GEO_COMPONENT_TYPE_INSTANCES:
is_instance = true;
break;
case GEO_COMPONENT_TYPE_VOLUME:
is_instance = ob->type != OB_VOLUME;
break;
case GEO_COMPONENT_TYPE_CURVE:
is_instance = !ELEM(ob->type, OB_CURVE, OB_FONT);
break;
}
if (is_instance) {
return true;
}
}
return false;
}
/** \} */
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