Jacques Lucke
7d281a4f7d
* Reduce code duplication. * Give methods more standardized names (e.g. `move_to_initialized` -> `move_assign`). * Support wrapping arbitrary C++ types, even those that e.g. are not copyable.
385 lines
12 KiB
C++
385 lines
12 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "BLI_map.hh"
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#include "BKE_attribute.h"
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#include "BKE_attribute_access.hh"
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#include "BKE_geometry_set.hh"
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#include "BKE_lib_id.h"
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#include "BKE_mesh.h"
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#include "BKE_mesh_wrapper.h"
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#include "BKE_modifier.h"
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#include "BKE_pointcloud.h"
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#include "BKE_spline.hh"
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#include "BKE_volume.h"
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#include "DNA_collection_types.h"
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#include "DNA_object_types.h"
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#include "BLI_rand.hh"
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#include "MEM_guardedalloc.h"
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using blender::float3;
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using blender::float4x4;
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using blender::Map;
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using blender::MutableSpan;
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using blender::Span;
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using blender::StringRef;
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using blender::Vector;
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/* -------------------------------------------------------------------- */
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/** \name Geometry Component
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* \{ */
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GeometryComponent::GeometryComponent(GeometryComponentType type) : type_(type)
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{
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}
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GeometryComponent *GeometryComponent::create(GeometryComponentType component_type)
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{
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switch (component_type) {
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case GEO_COMPONENT_TYPE_MESH:
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return new MeshComponent();
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case GEO_COMPONENT_TYPE_POINT_CLOUD:
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return new PointCloudComponent();
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case GEO_COMPONENT_TYPE_INSTANCES:
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return new InstancesComponent();
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case GEO_COMPONENT_TYPE_VOLUME:
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return new VolumeComponent();
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case GEO_COMPONENT_TYPE_CURVE:
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return new CurveComponent();
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}
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BLI_assert_unreachable();
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return nullptr;
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}
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void GeometryComponent::user_add() const
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{
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users_.fetch_add(1);
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}
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void GeometryComponent::user_remove() const
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{
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const int new_users = users_.fetch_sub(1) - 1;
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if (new_users == 0) {
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delete this;
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}
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}
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bool GeometryComponent::is_mutable() const
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{
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/* If the item is shared, it is read-only. */
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/* The user count can be 0, when this is called from the destructor. */
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return users_ <= 1;
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}
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GeometryComponentType GeometryComponent::type() const
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{
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return type_;
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}
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bool GeometryComponent::is_empty() const
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{
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return false;
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name Geometry Set
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* \{ */
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/* This method can only be used when the geometry set is mutable. It returns a mutable geometry
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* component of the given type.
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*/
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GeometryComponent &GeometrySet::get_component_for_write(GeometryComponentType component_type)
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{
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return components_.add_or_modify(
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component_type,
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[&](GeometryComponentPtr *value_ptr) -> GeometryComponent & {
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/* If the component did not exist before, create a new one. */
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new (value_ptr) GeometryComponentPtr(GeometryComponent::create(component_type));
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return **value_ptr;
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},
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[&](GeometryComponentPtr *value_ptr) -> GeometryComponent & {
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GeometryComponentPtr &value = *value_ptr;
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if (value->is_mutable()) {
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/* If the referenced component is already mutable, return it directly. */
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return *value;
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}
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/* If the referenced component is shared, make a copy. The copy is not shared and is
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* therefore mutable. */
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GeometryComponent *copied_component = value->copy();
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value = GeometryComponentPtr{copied_component};
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return *copied_component;
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});
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}
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/* Get the component of the given type. Might return null if the component does not exist yet. */
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const GeometryComponent *GeometrySet::get_component_for_read(
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GeometryComponentType component_type) const
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{
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const GeometryComponentPtr *component = components_.lookup_ptr(component_type);
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if (component != nullptr) {
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return component->get();
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}
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return nullptr;
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}
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bool GeometrySet::has(const GeometryComponentType component_type) const
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{
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return components_.contains(component_type);
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}
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void GeometrySet::remove(const GeometryComponentType component_type)
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{
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components_.remove(component_type);
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}
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void GeometrySet::add(const GeometryComponent &component)
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{
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BLI_assert(!components_.contains(component.type()));
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component.user_add();
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GeometryComponentPtr component_ptr{const_cast<GeometryComponent *>(&component)};
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components_.add_new(component.type(), std::move(component_ptr));
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}
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/**
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* Get all geometry components in this geometry set for read-only access.
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*/
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Vector<const GeometryComponent *> GeometrySet::get_components_for_read() const
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{
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Vector<const GeometryComponent *> components;
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for (const GeometryComponentPtr &ptr : components_.values()) {
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components.append(ptr.get());
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}
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return components;
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}
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void GeometrySet::compute_boundbox_without_instances(float3 *r_min, float3 *r_max) const
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{
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const PointCloud *pointcloud = this->get_pointcloud_for_read();
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if (pointcloud != nullptr) {
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BKE_pointcloud_minmax(pointcloud, *r_min, *r_max);
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}
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const Mesh *mesh = this->get_mesh_for_read();
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if (mesh != nullptr) {
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BKE_mesh_wrapper_minmax(mesh, *r_min, *r_max);
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}
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const Volume *volume = this->get_volume_for_read();
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if (volume != nullptr) {
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BKE_volume_min_max(volume, *r_min, *r_max);
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}
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const CurveEval *curve = this->get_curve_for_read();
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if (curve != nullptr) {
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/* Using the evaluated positions is somewhat arbitrary, but it is probably expected. */
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curve->bounds_min_max(*r_min, *r_max, true);
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}
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}
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std::ostream &operator<<(std::ostream &stream, const GeometrySet &geometry_set)
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{
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stream << "<GeometrySet at " << &geometry_set << ", " << geometry_set.components_.size()
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<< " components>";
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return stream;
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}
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/* Remove all geometry components from the geometry set. */
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void GeometrySet::clear()
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{
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components_.clear();
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}
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/* Make sure that the geometry can be cached. This does not ensure ownership of object/collection
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* instances. */
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void GeometrySet::ensure_owns_direct_data()
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{
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for (GeometryComponentType type : components_.keys()) {
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const GeometryComponent *component = this->get_component_for_read(type);
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if (!component->owns_direct_data()) {
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GeometryComponent &component_for_write = this->get_component_for_write(type);
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component_for_write.ensure_owns_direct_data();
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}
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}
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}
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/* Returns a read-only mesh or null. */
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const Mesh *GeometrySet::get_mesh_for_read() const
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{
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const MeshComponent *component = this->get_component_for_read<MeshComponent>();
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return (component == nullptr) ? nullptr : component->get_for_read();
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}
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/* Returns true when the geometry set has a mesh component that has a mesh. */
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bool GeometrySet::has_mesh() const
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{
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const MeshComponent *component = this->get_component_for_read<MeshComponent>();
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return component != nullptr && component->has_mesh();
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}
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/* Returns a read-only point cloud of null. */
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const PointCloud *GeometrySet::get_pointcloud_for_read() const
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{
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const PointCloudComponent *component = this->get_component_for_read<PointCloudComponent>();
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return (component == nullptr) ? nullptr : component->get_for_read();
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}
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/* Returns a read-only volume or null. */
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const Volume *GeometrySet::get_volume_for_read() const
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{
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const VolumeComponent *component = this->get_component_for_read<VolumeComponent>();
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return (component == nullptr) ? nullptr : component->get_for_read();
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}
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/* Returns a read-only curve or null. */
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const CurveEval *GeometrySet::get_curve_for_read() const
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{
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const CurveComponent *component = this->get_component_for_read<CurveComponent>();
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return (component == nullptr) ? nullptr : component->get_for_read();
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}
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/* Returns true when the geometry set has a point cloud component that has a point cloud. */
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bool GeometrySet::has_pointcloud() const
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{
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const PointCloudComponent *component = this->get_component_for_read<PointCloudComponent>();
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return component != nullptr && component->has_pointcloud();
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}
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/* Returns true when the geometry set has an instances component that has at least one instance. */
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bool GeometrySet::has_instances() const
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{
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const InstancesComponent *component = this->get_component_for_read<InstancesComponent>();
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return component != nullptr && component->instances_amount() >= 1;
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}
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/* Returns true when the geometry set has a volume component that has a volume. */
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bool GeometrySet::has_volume() const
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{
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const VolumeComponent *component = this->get_component_for_read<VolumeComponent>();
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return component != nullptr && component->has_volume();
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}
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/* Returns true when the geometry set has a curve component that has a curve. */
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bool GeometrySet::has_curve() const
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{
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const CurveComponent *component = this->get_component_for_read<CurveComponent>();
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return component != nullptr && component->has_curve();
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}
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/* Create a new geometry set that only contains the given mesh. */
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GeometrySet GeometrySet::create_with_mesh(Mesh *mesh, GeometryOwnershipType ownership)
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{
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GeometrySet geometry_set;
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MeshComponent &component = geometry_set.get_component_for_write<MeshComponent>();
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component.replace(mesh, ownership);
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return geometry_set;
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}
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/* Create a new geometry set that only contains the given point cloud. */
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GeometrySet GeometrySet::create_with_pointcloud(PointCloud *pointcloud,
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GeometryOwnershipType ownership)
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{
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GeometrySet geometry_set;
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PointCloudComponent &component = geometry_set.get_component_for_write<PointCloudComponent>();
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component.replace(pointcloud, ownership);
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return geometry_set;
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}
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/* Create a new geometry set that only contains the given curve. */
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GeometrySet GeometrySet::create_with_curve(CurveEval *curve, GeometryOwnershipType ownership)
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{
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GeometrySet geometry_set;
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CurveComponent &component = geometry_set.get_component_for_write<CurveComponent>();
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component.replace(curve, ownership);
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return geometry_set;
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}
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/* Clear the existing mesh and replace it with the given one. */
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void GeometrySet::replace_mesh(Mesh *mesh, GeometryOwnershipType ownership)
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{
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MeshComponent &component = this->get_component_for_write<MeshComponent>();
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component.replace(mesh, ownership);
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}
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/* Clear the existing curve and replace it with the given one. */
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void GeometrySet::replace_curve(CurveEval *curve, GeometryOwnershipType ownership)
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{
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CurveComponent &component = this->get_component_for_write<CurveComponent>();
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component.replace(curve, ownership);
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}
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/* Clear the existing point cloud and replace with the given one. */
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void GeometrySet::replace_pointcloud(PointCloud *pointcloud, GeometryOwnershipType ownership)
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{
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PointCloudComponent &pointcloud_component = this->get_component_for_write<PointCloudComponent>();
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pointcloud_component.replace(pointcloud, ownership);
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}
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/* Clear the existing volume and replace with the given one. */
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void GeometrySet::replace_volume(Volume *volume, GeometryOwnershipType ownership)
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{
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VolumeComponent &volume_component = this->get_component_for_write<VolumeComponent>();
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volume_component.replace(volume, ownership);
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}
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/* Returns a mutable mesh or null. No ownership is transferred. */
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Mesh *GeometrySet::get_mesh_for_write()
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{
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MeshComponent &component = this->get_component_for_write<MeshComponent>();
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return component.get_for_write();
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}
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/* Returns a mutable point cloud or null. No ownership is transferred. */
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PointCloud *GeometrySet::get_pointcloud_for_write()
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{
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PointCloudComponent &component = this->get_component_for_write<PointCloudComponent>();
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return component.get_for_write();
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}
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/* Returns a mutable volume or null. No ownership is transferred. */
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Volume *GeometrySet::get_volume_for_write()
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{
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VolumeComponent &component = this->get_component_for_write<VolumeComponent>();
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return component.get_for_write();
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}
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/* Returns a mutable curve or null. No ownership is transferred. */
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CurveEval *GeometrySet::get_curve_for_write()
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{
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CurveComponent &component = this->get_component_for_write<CurveComponent>();
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return component.get_for_write();
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name C API
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* \{ */
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void BKE_geometry_set_free(GeometrySet *geometry_set)
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{
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delete geometry_set;
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}
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bool BKE_geometry_set_has_instances(const GeometrySet *geometry_set)
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{
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return geometry_set->get_component_for_read<InstancesComponent>() != nullptr;
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}
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/** \} */
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