Hans Goudey
3db975f30d
Instances are created with an "index" parameter used for persistence over time through animation. Currently the geometry nodes instancer passes the index in the array for this value, but the arrays created by the "Point Distribution" node aren't necessarily stable in this way when the input mesh is deformed. In D9832 we already mostly solved this problem with an `id` attribute. The solution here is to create instances with this attribute as well. It's important to note that deforming the instanced points *after* distribution will usually be a better solution for this problem. This solution is likely still important though. Differential Revision: https://developer.blender.org/D10024
58 lines
1.6 KiB
C++
58 lines
1.6 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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void BKE_geometry_set_free(struct GeometrySet *geometry_set);
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bool BKE_geometry_set_has_instances(const struct GeometrySet *geometry_set);
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typedef enum InstancedDataType {
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INSTANCE_DATA_TYPE_OBJECT = 0,
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INSTANCE_DATA_TYPE_COLLECTION = 1,
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} InstancedDataType;
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typedef struct InstancedData {
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InstancedDataType type;
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union {
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struct Object *object;
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struct Collection *collection;
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} data;
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} InstancedData;
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int BKE_geometry_set_instances(const struct GeometrySet *geometry_set,
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float (**r_positions)[3],
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float (**r_rotations)[3],
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float (**r_scales)[3],
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int **r_ids,
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struct InstancedData **r_instanced_data);
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#ifdef __cplusplus
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}
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#endif
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