f3a475a767
Both the Alembic and USD libraries use double precision floating point numbers internally to store time. However the Alembic I/O code defaulted to floats even though Blender's Scene FPS, which is generally used for look ups, is stored using a double type. Such downcasts could lead to imprecise lookups, and would cause compilation warnings (at least on MSVC). This modifies the Alembic exporter and importer to make use of doubles for the current scene time, and only downcasting to float at the very last steps (e.g. for vertex interpolation). For the importer, doubles are also used for computing interpolation weights, as it is based on a time offset. Although the USD code already used doubles internally, floats were used at the C API level. Those were replaced as well. Differential Revision: https://developer.blender.org/D13855
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2019 Blender Foundation. All rights reserved. */
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#pragma once
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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 CacheFile;
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struct CacheReader;
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struct Object;
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struct bContext;
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struct USDExportParams {
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bool export_animation;
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bool export_hair;
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bool export_uvmaps;
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bool export_normals;
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bool export_materials;
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bool selected_objects_only;
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bool visible_objects_only;
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bool use_instancing;
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enum eEvaluationMode evaluation_mode;
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bool generate_preview_surface;
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bool export_textures;
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bool overwrite_textures;
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bool relative_texture_paths;
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};
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struct USDImportParams {
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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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char mesh_read_flag;
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bool import_cameras;
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bool import_curves;
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bool import_lights;
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bool import_materials;
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bool import_meshes;
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bool import_volumes;
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char *prim_path_mask;
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bool import_subdiv;
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bool import_instance_proxies;
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bool create_collection;
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bool import_guide;
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bool import_proxy;
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bool import_render;
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bool import_visible_only;
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bool use_instancing;
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bool import_usd_preview;
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bool set_material_blend;
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float light_intensity_scale;
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};
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/* The USD_export takes a as_background_job parameter, and returns 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 USD_export(struct bContext *C,
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const char *filepath,
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const struct USDExportParams *params,
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bool as_background_job);
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bool USD_import(struct bContext *C,
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const char *filepath,
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const struct USDImportParams *params,
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bool as_background_job);
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int USD_get_version(void);
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/* USD Import and Mesh Cache interface. */
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struct CacheArchiveHandle *USD_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 USD_free_handle(struct CacheArchiveHandle *handle);
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void USD_get_transform(struct CacheReader *reader, float r_mat[4][4], float time, float scale);
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/* Either modifies current_mesh in-place or constructs a new mesh. */
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struct Mesh *USD_read_mesh(struct CacheReader *reader,
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struct Object *ob,
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struct Mesh *existing_mesh,
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double time,
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const char **err_str,
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int read_flag);
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bool USD_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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double time,
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const char **err_str);
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struct CacheReader *CacheReader_open_usd_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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void USD_CacheReader_incref(struct CacheReader *reader);
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void USD_CacheReader_free(struct CacheReader *reader);
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#ifdef __cplusplus
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}
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#endif
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