Basic Alembic support

All in all, this patch adds an Alembic importer, an Alembic exporter,
and a new CacheFile data block which, for now, wraps around an Alembic
archive. This data block is made available through a new modifier ("Mesh
Sequence Cache") as well as a new constraint ("Transform Cache") to
somewhat properly support respectively geometric and transformation data
streaming from alembic caches.

A more in-depth documentation is to be found on the wiki, as well as a
 guide to compile alembic: https://wiki.blender.org/index.php/
User:Kevindietrich/AlembicBasicIo.

Many thanks to everyone involved in this little project, and huge shout
out to "cgstrive" for the thorough testings with Maya, 3ds Max, Houdini
and Realflow as well as @fjuhec, @jensverwiebe and @jasperge for the
custom builds and compile fixes.

Reviewers: sergey, campbellbarton, mont29

Reviewed By: sergey, campbellbarton, mont29

Differential Revision: https://developer.blender.org/D2060

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/editors/space_file/filelist.c b/source/blender/editors/space_file/filelist.c
index 5e9eb1f9207..b6e4991bf52 100644
--- a/source/blender/editors/space_file/filelist.c
+++ b/source/blender/editors/space_file/filelist.c
@@ -920,6 +920,8 @@ static int filelist_geticon_ex(
 		return ICON_FILE_BLANK;
 	else if (typeflag & FILE_TYPE_COLLADA)
 		return ICON_FILE_BLANK;
+	else if (typeflag & FILE_TYPE_ALEMBIC)
+		return ICON_FILE_BLANK;
 	else if (typeflag & FILE_TYPE_TEXT)
 		return ICON_FILE_TEXT;
 	else if (typeflag & FILE_TYPE_BLENDERLIB) {
@@ -1952,6 +1954,9 @@ int ED_path_extension_type(const char *path)
 	else if (BLI_testextensie(path, ".dae")) {
 		return FILE_TYPE_COLLADA;
 	}
+	else if (BLI_testextensie(path, ".abc")) {
+		return FILE_TYPE_ALEMBIC;
+	}
 	else if (BLI_testextensie_array(path, imb_ext_image) ||
 	         (G.have_quicktime && BLI_testextensie_array(path, imb_ext_image_qt)))
 	{
@@ -2004,6 +2009,8 @@ int ED_file_extension_icon(const char *path)
 			return ICON_FILE_BLANK;
 		case FILE_TYPE_COLLADA:
 			return ICON_FILE_BLANK;
+		case FILE_TYPE_ALEMBIC:
+			return ICON_FILE_BLANK;
 		case FILE_TYPE_TEXT:
 			return ICON_FILE_TEXT;
 		default: