OSPRay v1.3.0

• New MPI distributed device to support MPI distributed applications
  using OSPRay collectively for "in-situ" rendering (currently in "alpha")
  • Enabled via new mpi_distributed device type
  • Currently only supports raycast renderer, other renderers will be
    supported in the future
  • All API calls are expected to be exactly replicated (object instances
    and parameters) except scene data (geometries and volumes)
  • The original MPI device is now called the mpi_offload device to
    differentiate between the two implementations
• Support of Intel® AVX-512 for next generation Intel® Xeon® processor
  (codename Skylake), thus new minimum ISPC version is 1.9.1
• Thread affinity of OSPRay's tasking system can now be controlled via
  either device parameter setAffinity, or commandline parameter
  osp:setaffinity, or environment variable OSPRAY_SET_AFFINITY
• Changed behavior of the background color in the SciVis renderer:
  bgColor now includes alpha and is always blended (no
  backgroundEnabled anymore). To disable the background don't set
  bgColor, or set it to transparent black (0, 0, 0, 0)
• Geometries "spheres" and "cylinders" now support texture
  coordinates
• The GLUT- and Qt-based demo viewer applications have been replaced
  by an example viewer with minimal dependencies
  • Building the sample applications now requires GCC 4.9 (previously
    4.8) for features used in the C++ standard library; OSPRay
    itself can still be built with GCC 4.8
  • The new example viewer based on ospray::sg (called
    ospExampleViewerSg) is the single application we are
    consolidating to, ospExampleViewer will remain only as a
    deprecated viewer for compatibility with the old ospGlutViewer
    application
• Deprecated ospCreateDevice(); use ospNewDevice() instead
• Improved error handling
  • Various API functions now return an OSPError value
  • ospDeviceSetStatusFunc replaces the deprecated
    ospDeviceSetErrorMsgFunc
  • New API functions to query the last error
    (ospDeviceGetLastErrorCode() and ospDeviceGetLastErrorMsg())
    or to register an error callback with ospDeviceSetErrorFunc()
  • Fixed bug where exceptions could leak to C applications