Alembic: added frame offset property
The offset is subtracted, so that it's intuitive (dragging slider pushes the animation further that way on the timeline).
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@ -211,8 +211,9 @@ bool BKE_cachefile_filepath_get(
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float BKE_cachefile_time_offset(CacheFile *cache_file, const float time, const float fps)
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{
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const float time_offset = cache_file->frame_offset / fps;
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const float frame = (cache_file->override_frame ? cache_file->frame : time);
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return cache_file->is_sequence ? frame : frame / fps;
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return cache_file->is_sequence ? frame : frame / fps - time_offset;
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}
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/* TODO(kevin): replace this with some depsgraph mechanism, or something similar. */
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@ -4041,6 +4041,9 @@ void uiTemplateCacheFile(uiLayout *layout, bContext *C, PointerRNA *ptr, const c
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uiLayoutSetEnabled(row, RNA_boolean_get(&fileptr, "override_frame"));
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uiItemR(row, &fileptr, "frame", 0, "Frame", ICON_NONE);
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row = uiLayoutRow(layout, false);
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uiItemR(row, &fileptr, "frame_offset", 0, "Frame Offset", ICON_NONE);
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row = uiLayoutRow(layout, false);
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uiItemL(row, IFACE_("Manual Transform:"), ICON_NONE);
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@ -75,9 +75,12 @@ typedef struct CacheFile {
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float scale;
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float frame; /* The frame/time to lookup in the cache file. */
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float frame_offset; /* The frame offset to subtract. */
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short flag; /* Animation flag. */
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short draw_flag;
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char padding[4];
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} CacheFile;
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#ifdef __cplusplus
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@ -148,6 +148,15 @@ static void rna_def_cachefile(BlenderRNA *brna)
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" or to determine which file to use in a file sequence");
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RNA_def_property_update(prop, 0, "rna_CacheFile_update");
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prop = RNA_def_property(srna, "frame_offset", PROP_FLOAT, PROP_NONE);
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RNA_def_property_float_sdna(prop, NULL, "frame_offset");
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RNA_def_property_range(prop, -MAXFRAME, MAXFRAME);
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RNA_def_property_ui_text(prop, "Frame Offset",
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"Subtracted from the current frame to use for "
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"looking up the data in the cache file, or to "
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"determine which file to use in a file sequence");
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RNA_def_property_update(prop, 0, "rna_CacheFile_update");
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/* ----------------- Axis Conversion ----------------- */
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prop = RNA_def_property(srna, "forward_axis", PROP_ENUM, PROP_NONE);
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@ -109,7 +109,6 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
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Scene *scene = md->scene;
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const float frame = BKE_scene_frame_get(scene);
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const float time = BKE_cachefile_time_offset(mcmd->cache_file, frame, FPS);
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const char *err_str = NULL;
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CacheFile *cache_file = mcmd->cache_file;
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