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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 "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_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();
}
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
* \{ */
/* This method can only be used when the geometry set is mutable. It returns a mutable geometry
* component of the given type.
*/
GeometryComponent &GeometrySet::get_component_for_write(GeometryComponentType component_type)
{
return components_.add_or_modify(
component_type,
[&](GeometryComponentPtr *value_ptr) -> GeometryComponent & {
/* If the component did not exist before, create a new one. */
new (value_ptr) GeometryComponentPtr(GeometryComponent::create(component_type));
return **value_ptr;
},
[&](GeometryComponentPtr *value_ptr) -> GeometryComponent & {
GeometryComponentPtr &value = *value_ptr;
if (value->is_mutable()) {
/* If the referenced component is already mutable, return it directly. */
return *value;
}
/* If the referenced component is shared, make a copy. The copy is not shared and is
* therefore mutable. */
GeometryComponent *copied_component = value->copy();
value = GeometryComponentPtr{copied_component};
return *copied_component;
});
}
/* Get the component of the given type. Might return null if the component does not exist yet. */
const GeometryComponent *GeometrySet::get_component_for_read(
GeometryComponentType component_type) const
{
const GeometryComponentPtr *component = components_.lookup_ptr(component_type);
if (component != nullptr) {
return component->get();
}
return nullptr;
}
bool GeometrySet::has(const GeometryComponentType component_type) const
{
return components_.contains(component_type);
}
void GeometrySet::remove(const GeometryComponentType component_type)
{
components_.remove(component_type);
}
void GeometrySet::add(const GeometryComponent &component)
{
BLI_assert(!components_.contains(component.type()));
component.user_add();
GeometryComponentPtr component_ptr{const_cast<GeometryComponent *>(&component)};
components_.add_new(component.type(), std::move(component_ptr));
}
/**
* Get all geometry components in this geometry set for read-only access.
*/
Vector<const GeometryComponent *> GeometrySet::get_components_for_read() const
{
Vector<const GeometryComponent *> components;
for (const GeometryComponentPtr &ptr : components_.values()) {
components.append(ptr.get());
}
return components;
}
void GeometrySet::compute_boundbox_without_instances(float3 *r_min, float3 *r_max) const
{
const PointCloud *pointcloud = this->get_pointcloud_for_read();
if (pointcloud != nullptr) {
BKE_pointcloud_minmax(pointcloud, *r_min, *r_max);
}
const Mesh *mesh = this->get_mesh_for_read();
if (mesh != nullptr) {
BKE_mesh_wrapper_minmax(mesh, *r_min, *r_max);
}
const Volume *volume = this->get_volume_for_read();
if (volume != nullptr) {
BKE_volume_min_max(volume, *r_min, *r_max);
}
}
std::ostream &operator<<(std::ostream &stream, const GeometrySet &geometry_set)
{
stream << "<GeometrySet at " << &geometry_set << ", " << geometry_set.components_.size()
<< " components>";
return stream;
}
/* This generally should not be used. It is necessary currently, so that GeometrySet can by used by
* the CPPType system. */
bool operator==(const GeometrySet &UNUSED(a), const GeometrySet &UNUSED(b))
{
return false;
}
/* This generally should not be used. It is necessary currently, so that GeometrySet can by used by
* the CPPType system. */
uint64_t GeometrySet::hash() const
{
return reinterpret_cast<uint64_t>(this);
}
/* Remove all geometry components from the geometry set. */
void GeometrySet::clear()
{
components_.clear();
}
/* Make sure that the geometry can be cached. This does not ensure ownership of object/collection
* instances. */
void GeometrySet::ensure_owns_direct_data()
{
for (GeometryComponentType type : components_.keys()) {
const GeometryComponent *component = this->get_component_for_read(type);
if (!component->owns_direct_data()) {
GeometryComponent &component_for_write = this->get_component_for_write(type);
component_for_write.ensure_owns_direct_data();
}
}
}
/* Returns a read-only mesh or null. */
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();
}
/* Returns true when the geometry set has a mesh component that has a mesh. */
bool GeometrySet::has_mesh() const
{
const MeshComponent *component = this->get_component_for_read<MeshComponent>();
return component != nullptr && component->has_mesh();
}
/* Returns a read-only point cloud of null. */
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();
}
/* Returns a read-only volume or null. */
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();
}
/* Returns true when the geometry set has a point cloud component that has a point cloud. */
bool GeometrySet::has_pointcloud() const
{
const PointCloudComponent *component = this->get_component_for_read<PointCloudComponent>();
return component != nullptr && component->has_pointcloud();
}
/* Returns true when the geometry set has an instances component that has at least one instance. */
bool GeometrySet::has_instances() const
{
const InstancesComponent *component = this->get_component_for_read<InstancesComponent>();
return component != nullptr && component->instances_amount() >= 1;
}
/* Returns true when the geometry set has a volume component that has a volume. */
bool GeometrySet::has_volume() const
{
const VolumeComponent *component = this->get_component_for_read<VolumeComponent>();
return component != nullptr && component->has_volume();
}
/* Create a new geometry set that only contains the given mesh. */
GeometrySet GeometrySet::create_with_mesh(Mesh *mesh, GeometryOwnershipType ownership)
{
GeometrySet geometry_set;
MeshComponent &component = geometry_set.get_component_for_write<MeshComponent>();
component.replace(mesh, ownership);
return geometry_set;
}
/* Create a new geometry set that only contains the given point cloud. */
GeometrySet GeometrySet::create_with_pointcloud(PointCloud *pointcloud,
GeometryOwnershipType ownership)
{
GeometrySet geometry_set;
PointCloudComponent &component = geometry_set.get_component_for_write<PointCloudComponent>();
component.replace(pointcloud, ownership);
return geometry_set;
}
/* Clear the existing mesh and replace it with the given one. */
void GeometrySet::replace_mesh(Mesh *mesh, GeometryOwnershipType ownership)
{
MeshComponent &component = this->get_component_for_write<MeshComponent>();
component.replace(mesh, ownership);
}
/* Clear the existing point cloud and replace with the given one. */
void GeometrySet::replace_pointcloud(PointCloud *pointcloud, GeometryOwnershipType ownership)
{
PointCloudComponent &pointcloud_component = this->get_component_for_write<PointCloudComponent>();
pointcloud_component.replace(pointcloud, ownership);
}
/* Clear the existing volume and replace with the given one. */
void GeometrySet::replace_volume(Volume *volume, GeometryOwnershipType ownership)
{
VolumeComponent &volume_component = this->get_component_for_write<VolumeComponent>();
volume_component.replace(volume, ownership);
}
/* Returns a mutable mesh or null. No ownership is transferred. */
Mesh *GeometrySet::get_mesh_for_write()
{
MeshComponent &component = this->get_component_for_write<MeshComponent>();
return component.get_for_write();
}
/* Returns a mutable point cloud or null. No ownership is transferred. */
PointCloud *GeometrySet::get_pointcloud_for_write()
{
PointCloudComponent &component = this->get_component_for_write<PointCloudComponent>();
return component.get_for_write();
}
/* Returns a mutable volume or null. No ownership is transferred. */
Volume *GeometrySet::get_volume_for_write()
{
VolumeComponent &component = this->get_component_for_write<VolumeComponent>();
return component.get_for_write();
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name C API
* \{ */
void BKE_geometry_set_free(GeometrySet *geometry_set)
{
delete geometry_set;
}
bool BKE_geometry_set_has_instances(const GeometrySet *geometry_set)
{
return geometry_set->get_component_for_read<InstancesComponent>() != nullptr;
}
/** \} */
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