Jacques Lucke
5a9a16334c
Previously, the Point Instance node in geometry nodes could only instance existing objects or collections. The reason was that large parts of Blender worked under the assumption that objects are the main unit of instancing. Now we also want to instance geometry within an object, so a slightly larger refactor was necessary. This should not affect files that do not use the new kind of instances. The main change is a redefinition of what "instanced data" is. Now, an instances is a cow-object + object-data (the geometry). This can be nicely seen in `struct DupliObject`. This allows the same object to generate multiple geometries of different types which can be instanced individually. A nice side effect of this refactor is that having multiple geometry components is not a special case in the depsgraph object iterator anymore, because those components are integrated with the `DupliObject` system. Unfortunately, different systems that work with instances in Blender (e.g. render engines and exporters) often work under the assumption that objects are the main unit of instancing. So those have to be updated as well to be able to handle the new instances. This patch updates Cycles, EEVEE and other viewport engines. Exporters have not been updated yet. Some minimal (not master-ready) changes to update the obj and alembic exporters can be found in P2336 and P2335. Different file formats may want to handle these new instances in different ways. For users, the only thing that changed is that the Point Instance node now has a geometry mode. This also fixes T88454. Differential Revision: https://developer.blender.org/D11841
49 lines
1.4 KiB
C++
49 lines
1.4 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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/** \file
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* \ingroup bke
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Collection;
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struct GeometrySet;
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struct Object;
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/* Each geometry component has a specific type. The type determines what kind of data the component
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* stores. Functions modifying a geometry will usually just modify a subset of the component types.
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*/
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typedef enum GeometryComponentType {
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GEO_COMPONENT_TYPE_MESH = 0,
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GEO_COMPONENT_TYPE_POINT_CLOUD = 1,
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GEO_COMPONENT_TYPE_INSTANCES = 2,
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GEO_COMPONENT_TYPE_VOLUME = 3,
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GEO_COMPONENT_TYPE_CURVE = 4,
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} GeometryComponentType;
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void BKE_geometry_set_free(struct GeometrySet *geometry_set);
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bool BKE_object_has_geometry_set_instances(const struct Object *ob);
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#ifdef __cplusplus
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}
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#endif
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