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

2 files changed, 139 insertions, 0 deletions

diff --git a/build_files/cmake/Modules/FindAlembic.cmake b/build_files/cmake/Modules/FindAlembic.cmake
new file mode 100644
index 00000000000..1f61b5ef462
--- /dev/null
+++ b/build_files/cmake/Modules/FindAlembic.cmake
@@ -0,0 +1,70 @@
+# - Find Alembic library
+# Find the native Alembic includes and libraries
+# This module defines
+#  ALEMBIC_INCLUDE_DIRS, where to find Alembic headers, Set when
+#                        ALEMBIC_INCLUDE_DIR is found.
+#  ALEMBIC_LIBRARIES, libraries to link against to use Alembic.
+#  ALEMBIC_ROOT_DIR, The base directory to search for Alembic.
+#                    This can also be an environment variable.
+#  ALEMBIC_FOUND, If false, do not try to use Alembic.
+#
+
+#=============================================================================
+# Copyright 2016 Blender Foundation.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+# If ALEMBIC_ROOT_DIR was defined in the environment, use it.
+IF(NOT ALEMBIC_ROOT_DIR AND NOT $ENV{ALEMBIC_ROOT_DIR} STREQUAL "")
+  SET(ALEMBIC_ROOT_DIR $ENV{ALEMBIC_ROOT_DIR})
+ENDIF()
+
+SET(_alembic_SEARCH_DIRS
+  ${ALEMBIC_ROOT_DIR}
+  /usr/local
+  /sw # Fink
+  /opt/local # DarwinPorts
+  /opt/csw # Blastwave
+  /opt/lib/alembic
+)
+
+FIND_PATH(ALEMBIC_INCLUDE_DIR
+  NAMES
+    Alembic/Abc/All.h
+  HINTS
+    ${_alembic_SEARCH_DIRS}
+  PATH_SUFFIXES
+    include
+)
+
+FIND_LIBRARY(ALEMBIC_LIBRARY
+  NAMES
+    Alembic
+  HINTS
+    ${_alembic_SEARCH_DIRS}
+  PATH_SUFFIXES
+    lib64 lib lib/static
+)
+
+# handle the QUIETLY and REQUIRED arguments and set ALEMBIC_FOUND to TRUE if 
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(ALEMBIC DEFAULT_MSG ALEMBIC_LIBRARY ALEMBIC_INCLUDE_DIR)
+
+IF(ALEMBIC_FOUND)
+  SET(ALEMBIC_LIBRARIES ${ALEMBIC_LIBRARY})
+  SET(ALEMBIC_INCLUDE_DIRS ${ALEMBIC_INCLUDE_DIR})
+ENDIF(ALEMBIC_FOUND)
+
+MARK_AS_ADVANCED(
+  ALEMBIC_INCLUDE_DIR
+  ALEMBIC_LIBRARY
+)
+
+UNSET(_alembic_SEARCH_DIRS)
diff --git a/build_files/cmake/Modules/FindHDF5.cmake b/build_files/cmake/Modules/FindHDF5.cmake
new file mode 100644
index 00000000000..56ceda8fb5e
--- /dev/null
+++ b/build_files/cmake/Modules/FindHDF5.cmake
@@ -0,0 +1,69 @@
+# - Find HDF5 library
+# Find the native HDF5 includes and libraries
+# This module defines
+#  HDF5_INCLUDE_DIRS, where to find hdf5.h, Set when HDF5_INCLUDE_DIR is found.
+#  HDF5_LIBRARIES, libraries to link against to use HDF5.
+#  HDF5_ROOT_DIR, The base directory to search for HDF5.
+#                 This can also be an environment variable.
+#  HDF5_FOUND, If false, do not try to use HDF5.
+#
+
+#=============================================================================
+# Copyright 2016 Blender Foundation.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+# If HDF5_ROOT_DIR was defined in the environment, use it.
+IF(NOT HDF5_ROOT_DIR AND NOT $ENV{HDF5_ROOT_DIR} STREQUAL "")
+  SET(HDF5_ROOT_DIR $ENV{HDF5_ROOT_DIR})
+ENDIF()
+
+SET(_hdf5_SEARCH_DIRS
+  ${HDF5_ROOT_DIR}
+  /usr/local
+  /sw # Fink
+  /opt/local # DarwinPorts
+  /opt/csw # Blastwave
+  /opt/lib/hdf5
+)
+
+FIND_LIBRARY(HDF5_LIBRARY
+  NAMES
+    hdf5
+  HINTS
+    ${_hdf5_SEARCH_DIRS}
+  PATH_SUFFIXES
+    lib64 lib
+)
+
+FIND_PATH(HDF5_INCLUDE_DIR
+  NAMES
+    hdf5.h
+  HINTS
+    ${_hdf5_SEARCH_DIRS}
+  PATH_SUFFIXES
+    include
+)
+
+# handle the QUIETLY and REQUIRED arguments and set HDF5_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(HDF5 DEFAULT_MSG HDF5_LIBRARY HDF5_INCLUDE_DIR)
+
+IF(HDF5_FOUND)
+  SET(HDF5_LIBRARIES ${HDF5_LIBRARY})
+  SET(HDF5_INCLUDE_DIRS ${HDF5_INCLUDE_DIR})
+ENDIF(HDF5_FOUND)
+
+MARK_AS_ADVANCED(
+  HDF5_INCLUDE_DIR
+  HDF5_LIBRARY
+)
+
+UNSET(_hdf5_SEARCH_DIRS)