Cleanup: split `BKE_anim.h` and `anim.c` into smaller pieces

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.

1 files changed, 51 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_anim_path.h b/source/blender/blenkernel/BKE_anim_path.h
new file mode 100644
index 00000000000..64bcedefa58
--- /dev/null
+++ b/source/blender/blenkernel/BKE_anim_path.h
@@ -0,0 +1,51 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ */
+#ifndef __BKE_ANIM_PATH_H__
+#define __BKE_ANIM_PATH_H__
+
+/** \file
+ * \ingroup bke
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ListBase;
+struct Object;
+struct Path;
+
+/* ---------------------------------------------------- */
+/* Curve Paths */
+
+void free_path(struct Path *path);
+void calc_curvepath(struct Object *ob, struct ListBase *nurbs);
+int where_on_path(struct Object *ob,
+                  float ctime,
+                  float vec[4],
+                  float dir[3],
+                  float quat[4],
+                  float *radius,
+                  float *weight);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif