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
141 lines
4.3 KiB
C++
141 lines
4.3 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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#pragma once
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/** \file
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* \ingroup balembic
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*/
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#include "DEG_depsgraph.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct CacheArchiveHandle;
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struct CacheReader;
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struct ListBase;
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struct Main;
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struct Mesh;
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struct Object;
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struct Scene;
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struct bContext;
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int ABC_get_version(void);
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struct AlembicExportParams {
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double frame_start;
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double frame_end;
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unsigned int frame_samples_xform;
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unsigned int frame_samples_shape;
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double shutter_open;
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double shutter_close;
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bool selected_only;
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bool uvs;
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bool normals;
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bool vcolors;
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bool orcos;
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bool apply_subdiv;
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bool curves_as_mesh;
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bool flatten_hierarchy;
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bool visible_objects_only;
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bool face_sets;
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bool use_subdiv_schema;
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bool packuv;
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bool triangulate;
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bool export_hair;
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bool export_particles;
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bool export_custom_properties;
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bool use_instancing;
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enum eEvaluationMode evaluation_mode;
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/* See MOD_TRIANGULATE_NGON_xxx and MOD_TRIANGULATE_QUAD_xxx
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* in DNA_modifier_types.h */
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int quad_method;
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int ngon_method;
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float global_scale;
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};
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/* The ABC_export and ABC_import functions both take a as_background_job
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* parameter, and return a boolean.
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*
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* When as_background_job=true, returns false immediately after scheduling
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* a background job.
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*
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* When as_background_job=false, performs the export synchronously, and returns
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* true when the export was ok, and false if there were any errors.
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*/
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bool ABC_export(struct Scene *scene,
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struct bContext *C,
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const char *filepath,
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const struct AlembicExportParams *params,
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bool as_background_job);
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bool ABC_import(struct bContext *C,
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const char *filepath,
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float scale,
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bool is_sequence,
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bool set_frame_range,
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int sequence_len,
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int offset,
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bool validate_meshes,
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bool always_add_cache_reader,
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bool as_background_job);
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struct CacheArchiveHandle *ABC_create_handle(struct Main *bmain,
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const char *filename,
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struct ListBase *object_paths);
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void ABC_free_handle(struct CacheArchiveHandle *handle);
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void ABC_get_transform(struct CacheReader *reader,
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float r_mat_world[4][4],
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float time,
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float scale);
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/* Either modifies existing_mesh in-place or constructs a new mesh. */
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struct Mesh *ABC_read_mesh(struct CacheReader *reader,
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struct Object *ob,
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struct Mesh *existing_mesh,
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const float time,
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const char **err_str,
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const int read_flags,
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const char *velocity_name,
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const float velocity_scale);
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bool ABC_mesh_topology_changed(struct CacheReader *reader,
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struct Object *ob,
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struct Mesh *existing_mesh,
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const float time,
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const char **err_str);
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void ABC_CacheReader_incref(struct CacheReader *reader);
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void ABC_CacheReader_free(struct CacheReader *reader);
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struct CacheReader *CacheReader_open_alembic_object(struct CacheArchiveHandle *handle,
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struct CacheReader *reader,
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struct Object *object,
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const char *object_path);
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#ifdef __cplusplus
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}
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#endif
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