60 lines
2.4 KiB
C++
60 lines
2.4 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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#pragma once
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#include "BKE_geometry_set.hh"
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namespace blender::bke {
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/**
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* Used to keep track of a group of instances using the same geometry data.
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*/
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struct GeometryInstanceGroup {
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/**
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* The geometry set instanced on each of the transforms. The components are not necessarily
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* owned here. For example, they may be owned by the instanced object. This cannot be a
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* reference because not all instanced data will necessarily have a #geometry_set_eval.
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*/
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GeometrySet geometry_set;
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/**
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* As an optimization to avoid copying, the same geometry set can be associated with multiple
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* instances. Each instance is stored as a transform matrix here. Again, these must be owned
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* because they may be transformed from the original data. TODO: Validate that last statement.
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*/
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Vector<float4x4> transforms;
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};
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void geometry_set_gather_instances(const GeometrySet &geometry_set,
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Vector<GeometryInstanceGroup> &r_instance_groups);
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GeometrySet geometry_set_realize_mesh_for_modifier(const GeometrySet &geometry_set);
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GeometrySet geometry_set_realize_instances(const GeometrySet &geometry_set);
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/**
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* Add information about all the attributes on every component of the type. The resulting info
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* will contain the highest complexity data type and the highest priority domain among every
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* attribute with the given name on all of the input components.
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*/
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void geometry_set_gather_instances_attribute_info(
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Span<GeometryInstanceGroup> set_groups,
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Span<GeometryComponentType> component_types,
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const Set<std::string> &ignored_attributes,
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Map<AttributeIDRef, AttributeKind> &r_attributes);
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} // namespace blender::bke
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