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

4 files changed, 43 insertions, 0 deletions

diff --git a/release/scripts/modules/sys_info.py b/release/scripts/modules/sys_info.py
index b225325ba27..30b9cdfaf37 100644
--- a/release/scripts/modules/sys_info.py
+++ b/release/scripts/modules/sys_info.py
@@ -158,6 +158,13 @@ def write_sysinfo(filepath):
     else:
         output.write("Blender was built without OpenVDB support\n")
 
+    alembic = bpy.app.alembic
+    output.write("Alembic: ")
+    if alembic.supported:
+        output.write("%s\n" % alembic.version_string)
+    else:
+        output.write("Blender was built without Alembic support\n")
+
     if not bpy.app.build_options.sdl:
         output.write("SDL: Blender was built without SDL support\n")
 
diff --git a/release/scripts/startup/bl_ui/properties_constraint.py b/release/scripts/startup/bl_ui/properties_constraint.py
index 4ca2f773dcc..cb5f1595ff3 100644
--- a/release/scripts/startup/bl_ui/properties_constraint.py
+++ b/release/scripts/startup/bl_ui/properties_constraint.py
@@ -880,6 +880,19 @@ class ConstraintButtonsPanel:
 
         layout.operator("clip.constraint_to_fcurve")
 
+    def TRANSFORM_CACHE(self, context, layout, con):
+        layout.label(text="Cache File Properties:")
+        box = layout.box()
+        box.template_cache_file(con, "cache_file")
+
+        cache_file = con.cache_file
+        
+        layout.label(text="Constraint Properties:")
+        box = layout.box()
+        
+        if cache_file is not None:
+            box.prop_search(con, "object_path", cache_file, "object_paths")
+
     def SCRIPT(self, context, layout, con):
         layout.label("Blender 2.6 doesn't support python constraints yet")
 
diff --git a/release/scripts/startup/bl_ui/properties_data_modifier.py b/release/scripts/startup/bl_ui/properties_data_modifier.py
index de3e98611d7..50221d57b49 100644
--- a/release/scripts/startup/bl_ui/properties_data_modifier.py
+++ b/release/scripts/startup/bl_ui/properties_data_modifier.py
@@ -181,6 +181,9 @@ class DATA_PT_modifiers(ModifierButtonsPanel, Panel):
         layout.prop(md, "cache_format")
         layout.prop(md, "filepath")
 
+        if md.cache_format == 'ABC':
+            layout.prop(md, "sub_object")
+
         layout.label(text="Evaluation:")
         layout.prop(md, "factor", slider=True)
         layout.prop(md, "deform_mode")
@@ -215,6 +218,22 @@ class DATA_PT_modifiers(ModifierButtonsPanel, Panel):
         row = split.row()
         row.prop(md, "flip_axis")
 
+    def MESH_SEQUENCE_CACHE(self, layout, ob, md):
+        layout.label(text="Cache File Properties:")
+        box = layout.box()
+        box.template_cache_file(md, "cache_file")
+
+        cache_file = md.cache_file
+
+        layout.label(text="Modifier Properties:")
+        box = layout.box()
+
+        if cache_file is not None:
+            box.prop_search(md, "object_path", cache_file, "object_paths")
+
+        if ob.type == 'MESH':
+            box.row().prop(md, "read_data")
+
     def CAST(self, layout, ob, md):
         split = layout.split(percentage=0.25)
 
diff --git a/release/scripts/startup/bl_ui/space_info.py b/release/scripts/startup/bl_ui/space_info.py
index 97ef37fa5e0..780dc4cf982 100644
--- a/release/scripts/startup/bl_ui/space_info.py
+++ b/release/scripts/startup/bl_ui/space_info.py
@@ -158,6 +158,8 @@ class INFO_MT_file_import(Menu):
     def draw(self, context):
         if bpy.app.build_options.collada:
             self.layout.operator("wm.collada_import", text="Collada (Default) (.dae)")
+        if bpy.app.build_options.alembic:
+            self.layout.operator("wm.alembic_import", text="Alembic (.abc)")
 
 
 class INFO_MT_file_export(Menu):
@@ -167,6 +169,8 @@ class INFO_MT_file_export(Menu):
     def draw(self, context):
         if bpy.app.build_options.collada:
             self.layout.operator("wm.collada_export", text="Collada (Default) (.dae)")
+        if bpy.app.build_options.alembic:
+            self.layout.operator("wm.alembic_export", text="Alembic (.abc)")
 
 
 class INFO_MT_file_external_data(Menu):