The files are now split up into the following sections: - `BKE_anim_path.h` and `anim_path.c` for path/curve functions. - `BKE_anim_visualization.h` and `anim_visualizationanim_path.c` for animation visualization (mostly motion paths). - `BKE_duplilist.h` for DupliList function declarations. These were already implemented in `object_dupli.c`, so they were rather out of place being declared in `BKE_anim.h` in the first place. No functional changes.