Objects: add Volume object type, and prototypes for Hair and PointCloud

Only the volume object is exposed in the user interface. It is based on OpenVDB
internally. Drawing and rendering code will follow in another commit.
https://wiki.blender.org/wiki/Source/Objects/Volume
https://wiki.blender.org/wiki/Reference/Release_Notes/2.83/Volumes

Hair and PointCloud object types are hidden behind a WITH_NEW_OBJECT_TYPES
build option. These are unfinished, and included only to make it easier to
cooperate on development in the future and avoid tricky merges.
https://wiki.blender.org/wiki/Source/Objects/New_Object_Types

Ref T73201, T68981

Differential Revision: https://developer.blender.org/D6945

1 files changed, 71 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_hair.h b/source/blender/blenkernel/BKE_hair.h
new file mode 100644
index 00000000000..0cb26581aef
--- /dev/null
+++ b/source/blender/blenkernel/BKE_hair.h
@@ -0,0 +1,71 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * Contributor(s): Brecht Van Lommel.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __BKE_HAIR_H__
+#define __BKE_HAIR_H__
+
+/** \file BKE_hair.h
+ *  \ingroup bke
+ *  \brief General operations for hairs.
+ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct BoundBox;
+struct Depsgraph;
+struct Hair;
+struct Main;
+struct Object;
+struct Scene;
+
+void *BKE_hair_add(struct Main *bmain, const char *name);
+struct Hair *BKE_hair_copy(struct Main *bmain, const struct Hair *hair);
+
+struct BoundBox *BKE_hair_boundbox_get(struct Object *ob);
+
+void BKE_hair_update_customdata_pointers(struct Hair *hair);
+
+/* Depsgraph */
+
+struct Hair *BKE_hair_new_for_eval(const struct Hair *hair_src, int totpoint, int totcurve);
+struct Hair *BKE_hair_copy_for_eval(struct Hair *hair_src, bool reference);
+
+void BKE_hair_data_update(struct Depsgraph *depsgraph, struct Scene *scene, struct Object *object);
+
+/* Draw Cache */
+
+enum {
+  BKE_HAIR_BATCH_DIRTY_ALL = 0,
+};
+
+void BKE_hair_batch_cache_dirty_tag(struct Hair *hair, int mode);
+void BKE_hair_batch_cache_free(struct Hair *hair);
+
+extern void (*BKE_hair_batch_cache_dirty_tag_cb)(struct Hair *hair, int mode);
+extern void (*BKE_hair_batch_cache_free_cb)(struct Hair *hair);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif