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, 130 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_volume_types.h b/source/blender/makesdna/DNA_volume_types.h
new file mode 100644
index 00000000000..af419ea1d55
--- /dev/null
+++ b/source/blender/makesdna/DNA_volume_types.h
@@ -0,0 +1,130 @@
+/*
+ * ***** 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.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file DNA_volume_types.h
+ *  \ingroup DNA
+ */
+
+#ifndef __DNA_VOLUME_TYPES_H__
+#define __DNA_VOLUME_TYPES_H__
+
+#include "DNA_ID.h"
+
+struct PackedFile;
+struct VolumeGridVector;
+
+typedef struct Volume_Runtime {
+  /* OpenVDB Grids */
+  struct VolumeGridVector *grids;
+
+  /* Current frame in sequence for evaluated volume */
+  int frame;
+  int _pad;
+} Volume_Runtime;
+
+typedef struct VolumeDisplay {
+  float density;
+  int wireframe_type;
+  int wireframe_detail;
+  int _pad[1];
+} VolumeDisplay;
+
+typedef struct VolumeRender {
+  int precision;
+  int space;
+  float step_size;
+  float clipping;
+} VolumeRender;
+
+typedef struct Volume {
+  ID id;
+  struct AnimData *adt; /* animation data (must be immediately after id) */
+
+  /* File */
+  char filepath[1024]; /* FILE_MAX */
+  struct PackedFile *packedfile;
+
+  /* Sequence */
+  char is_sequence;
+  char sequence_mode;
+  char _pad1[2];
+  int frame_start;
+  int frame_duration;
+  int frame_offset;
+
+  /* Flag */
+  int flag;
+
+  /* Grids */
+  int active_grid;
+
+  /* Material */
+  struct Material **mat;
+  short totcol;
+  short _pad2[3];
+
+  /* Render & Display Settings */
+  VolumeRender render;
+  VolumeDisplay display;
+
+  /* Draw Cache */
+  void *batch_cache;
+
+  /* Runtime Data */
+  Volume_Runtime runtime;
+} Volume;
+
+/* Volume.flag */
+enum {
+  VO_DS_EXPAND = (1 << 0),
+};
+
+/* Volume.sequence_mode */
+typedef enum VolumeSequenceMode {
+  VOLUME_SEQUENCE_CLIP = 0,
+  VOLUME_SEQUENCE_EXTEND,
+  VOLUME_SEQUENCE_REPEAT,
+  VOLUME_SEQUENCE_PING_PONG,
+} VolumeSequenceMode;
+
+/* VolumeDisplay.wireframe_type */
+typedef enum VolumeWireframeType {
+  VOLUME_WIREFRAME_NONE = 0,
+  VOLUME_WIREFRAME_BOUNDS = 1,
+  VOLUME_WIREFRAME_BOXES = 2,
+  VOLUME_WIREFRAME_POINTS = 3,
+} VolumeWireframeType;
+
+/* VolumeDisplay.wireframe_detail */
+typedef enum VolumeWireframeDetail {
+  VOLUME_WIREFRAME_COARSE = 0,
+  VOLUME_WIREFRAME_FINE = 1,
+} VolumeWireframeDetail;
+
+/* VolumeRender.space */
+typedef enum VolumeRenderSpace {
+  VOLUME_SPACE_OBJECT = 0,
+  VOLUME_SPACE_WORLD = 1,
+} VolumeRenderSpace;
+
+/* Only one material supported currently. */
+#define VOLUME_MATERIAL_NR 1
+
+#endif /* __DNA_VOLUME_TYPES_H__ */