128eb6cbe9
Previously fluid simulation and Alembic modifiers had a dedicated function to query the velocity for motion blur. Now use a more generic system where those modifiers output a velocity attribute. Advantages: * Geometry and particle nodes can output velocity through the same mechanism, or read the attribute coming from earlier modifiers. * The velocity can be preserved through modifiers like subdivision surface or auto smooth. * USD and Alembic previously only output velocity from fluid simulation, now they work with velocity from other sources too. * Simplifies the code for renderers like Cycles and exporters like Alembic and USD. This breaks compatibility: * External renderers and exporters accessing these velocities through the Python API now need to use the attribute instead. * Existing modifier node setups that create an attribute named "velocity" will render differently with motion blur. Differential Revision: https://developer.blender.org/D12305
93 lines
3.3 KiB
C++
93 lines
3.3 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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* The Original Code is Copyright (C) 2006 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup bke
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* \brief Generic geometry attributes built on CustomData.
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*/
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#pragma once
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#include "BLI_sys_types.h"
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#include "BKE_customdata.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct CustomData;
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struct CustomDataLayer;
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struct ID;
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struct ReportList;
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/* Attribute.domain */
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/**
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* \warning Careful when changing existing items.
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* Arrays may be initialized from this (e.g. #DATASET_layout_hierarchy).
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*/
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typedef enum AttributeDomain {
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ATTR_DOMAIN_AUTO = -1, /* Use for nodes to choose automatically based on other data. */
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ATTR_DOMAIN_POINT = 0, /* Mesh, Hair or PointCloud Point */
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ATTR_DOMAIN_EDGE = 1, /* Mesh Edge */
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ATTR_DOMAIN_FACE = 2, /* Mesh Face */
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ATTR_DOMAIN_CORNER = 3, /* Mesh Corner */
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ATTR_DOMAIN_CURVE = 4, /* Hair Curve */
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ATTR_DOMAIN_NUM
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} AttributeDomain;
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/* Attributes */
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bool BKE_id_attributes_supported(struct ID *id);
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struct CustomDataLayer *BKE_id_attribute_new(struct ID *id,
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const char *name,
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const int type,
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const AttributeDomain domain,
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struct ReportList *reports);
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bool BKE_id_attribute_remove(struct ID *id,
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struct CustomDataLayer *layer,
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struct ReportList *reports);
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struct CustomDataLayer *BKE_id_attribute_find(const struct ID *id,
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const char *name,
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const int type,
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const AttributeDomain domain);
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AttributeDomain BKE_id_attribute_domain(struct ID *id, struct CustomDataLayer *layer);
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int BKE_id_attribute_data_length(struct ID *id, struct CustomDataLayer *layer);
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bool BKE_id_attribute_required(struct ID *id, struct CustomDataLayer *layer);
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bool BKE_id_attribute_rename(struct ID *id,
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struct CustomDataLayer *layer,
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const char *new_name,
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struct ReportList *reports);
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int BKE_id_attributes_length(struct ID *id, const CustomDataMask mask);
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struct CustomDataLayer *BKE_id_attributes_active_get(struct ID *id);
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void BKE_id_attributes_active_set(struct ID *id, struct CustomDataLayer *layer);
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int *BKE_id_attributes_active_index_p(struct ID *id);
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CustomData *BKE_id_attributes_iterator_next_domain(struct ID *id, struct CustomDataLayer *layers);
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#ifdef __cplusplus
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}
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#endif
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