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

2 files changed, 17 insertions, 3 deletions

diff --git a/source/blender/editors/space_file/filelist.c b/source/blender/editors/space_file/filelist.c
index 188f3417ddc..1fc0866bd9f 100644
--- a/source/blender/editors/space_file/filelist.c
+++ b/source/blender/editors/space_file/filelist.c
@@ -1080,6 +1080,9 @@ static int filelist_geticon_ex(FileDirEntry *file,
   else if (typeflag & FILE_TYPE_USD) {
     return ICON_FILE_3D;
   }
+  else if (typeflag & FILE_TYPE_VOLUME) {
+    return ICON_FILE_VOLUME;
+  }
   else if (typeflag & FILE_TYPE_OBJECT_IO) {
     return ICON_FILE_3D;
   }
@@ -2236,6 +2239,9 @@ int ED_path_extension_type(const char *path)
   else if (BLI_path_extension_check_n(path, ".usd", ".usda", ".usdc", NULL)) {
     return FILE_TYPE_USD;
   }
+  else if (BLI_path_extension_check(path, ".vdb")) {
+    return FILE_TYPE_VOLUME;
+  }
   else if (BLI_path_extension_check(path, ".zip")) {
     return FILE_TYPE_ARCHIVE;
   }
@@ -2298,6 +2304,8 @@ int ED_file_extension_icon(const char *path)
       return ICON_FILE_TEXT;
     case FILE_TYPE_ARCHIVE:
       return ICON_FILE_ARCHIVE;
+    case FILE_TYPE_VOLUME:
+      return ICON_FILE_VOLUME;
     default:
       return ICON_FILE_BLANK;
   }
@@ -2625,9 +2633,9 @@ static void filelist_readjob_main_rec(Main *bmain, FileList *filelist)
   if (filelist->dir[0] == 0) {
     /* make directories */
 #  ifdef WITH_FREESTYLE
-    filelist->filelist.nbr_entries = 24;
+		filelist->filelist.nbr_entries = 27;
 #  else
-    filelist->filelist.nbr_entries = 23;
+		filelist->filelist.nbr_entries = 26;
 #  endif
     filelist_resize(filelist, filelist->filelist.nbr_entries);
 
@@ -2658,8 +2666,11 @@ static void filelist_readjob_main_rec(Main *bmain, FileList *filelist)
     filelist->filelist.entries[20].entry->relpath = BLI_strdup("Action");
     filelist->filelist.entries[21].entry->relpath = BLI_strdup("NodeTree");
     filelist->filelist.entries[22].entry->relpath = BLI_strdup("Speaker");
+		filelist->filelist.entries[23].entry->relpath = BLI_strdup("Hair");
+		filelist->filelist.entries[24].entry->relpath = BLI_strdup("Point Cloud");
+		filelist->filelist.entries[25].entry->relpath = BLI_strdup("Volume");
 #  ifdef WITH_FREESTYLE
-    filelist->filelist.entries[23].entry->relpath = BLI_strdup("FreestyleLineStyle");
+		filelist->filelist.entries[26].entry->relpath = BLI_strdup("FreestyleLineStyle");
 #  endif
   }
   else {
diff --git a/source/blender/editors/space_file/filesel.c b/source/blender/editors/space_file/filesel.c
index d07db12eeac..6c0f79f0f5c 100644
--- a/source/blender/editors/space_file/filesel.c
+++ b/source/blender/editors/space_file/filesel.c
@@ -218,6 +218,9 @@ short ED_fileselect_set_params(SpaceFile *sfile)
     if ((prop = RNA_struct_find_property(op->ptr, "filter_usd"))) {
       params->filter |= RNA_property_boolean_get(op->ptr, prop) ? FILE_TYPE_USD : 0;
     }
+    if ((prop = RNA_struct_find_property(op->ptr, "filter_volume"))) {
+      params->filter |= RNA_property_boolean_get(op->ptr, prop) ? FILE_TYPE_VOLUME : 0;
+    }
     if ((prop = RNA_struct_find_property(op->ptr, "filter_glob"))) {
       /* Protection against pyscripts not setting proper size limit... */
       char *tmp = RNA_property_string_get_alloc(