OSPRay v1.6.1

Many bug fixes

• Quad mesh interpolation and sampling
• Normal mapping in path tracer materials
• Memory corruption with partly emitting mesh lights
• Logic for setting thread affinity

OSPRay v1.6.0

• Updated ISPC device to use Embree v3.1+
• Added new ospShutdown API function to aid in correctness and determinism
  of OSPRay API cleanup
• Added Principled and CarPaint materials to the path tracer
• Improved flexibility of the tone mapper
• Improvements to UnstructuredVolume
  • Implemented support for wedges (in addition to tets and hexes)
  • Implemented support for implicit isosurface geometry
  • Implemented support for cell-centered data (as an alternative to
    per-vertex data)
  • Added an option to precompute normals, providing a memory/performance
    tradeoff for applications
• Implemented QuadMesh geometry type to handle quads directly
• Implemented the ability to set 'void' cell values in all volume types
  • When nan is present as a volume's cell value the volume sample will be
    ignored by the scivis renderer
• Fixed support for color strides which were not multiples of sizeof(float)
• Added support for RGBA8 color format to Spheres, which can be set by
  specifying the "colorFormat" parameter as OSP_UCHAR4, or passing the
  "colorData" through an OSPData of OSP_UCHAR4.
• Added ability to configure Embree scene flags via OSPModel parameters
• ospFreeFrameBuffer has been deprecated in favor of using ospRelease to
  free frame buffer handles
• Fixed memory leak caused by incorrect parameter reference counts in ISPC
  device
• Fixed occasional crashes in the MPIOffload device on shutdown
• Various improvements to sample apps and ospray_sg
  • Added new generator nodes, allowing the ability to inject
    programmatically generated scene data (only C++ for now)
  • Bugfixes and improvements to enhance stability and usability

OSPRay v1.5.0

• TetrahedralVolume now generalized to take both tet and hex data, now called
  UnstructuredVolume
• New function for creating materials (ospNewMaterial2) which takes the
  renderer type string, not a renderer instance (the old version is now
  deprecated)
• New tonemapper PixelOp for tone mapping final frames
• Streamlines now support per-vertex radii and smooth interpolation
• ospray_sg headers are now installed alongside the SDK
• Core OSPRay ispc device now implemented as a module
  • Devices which implement the public API are no longer required to link
    the dependencies to core OSPRay (e.g. Embree v2.x)
  • By default, ospInit will load the ispc module if a device was not
    created via --osp:mpi or --osp:device:[name]
• MPI devices can now accept an existing world communicator instead of always
  creating their own
• Added ability to control ISPC specific optimization flags via CMake options
  • See the various ISPC_FLAGS_* variables to control which flags get used
• Enhancements to sample applications
  • ospray_sg (and thus ospExampleViewer/ospBenchmark) can now be
    extended with new scene data importers via modules or the SDK
  • Updated ospTutorial examples to properly call ospRelease()
  • New options in the ospExampleViewer GUI to showcase new features
    • SRGB frame buffers, tone mapping, etc.
• General bug fixes
  • Fixes to geometries with multiple emissive materials
  • Improvements to precision of ray-sphere intersections

OSPRay v1.4.3

• Several bug fixes
  • Fixed potential issue with static initialization order
  • Correct compiler flags for Debug config
  • Spheres postIntersect shading is now 64-bit safer

OSPRay v1.4.2

• Several cleanups and bug fixes
  • Fixed memory leak where the Embree BVH was never released when an
    OSPModel was released
  • Fixed a crash when API logging was enabled in certain situations
  • Fixed a crash in MPI mode when creating lights without a renderer
  • Fixed an issue with camera lens samples not initilized when spp <= 0
  • Fixed an issue in ospExampleViewer when specifying multiple data files
• The C99 tutorial is now indicated as the default; the C++ wrappers do not
  change the semantics of the API (memory management) so the C99 version
  should be considered first when learning the API

OSPRay v1.4.1

• Several cleanups and bug fixes
  • Improved precision of ray intersection with streamlines,
    spheres, and cylinder geometries
  • Fixed address overflow in framebuffer, in practice image size is
    now limited only by available memory
  • Fixed several deadlocks and race conditions
  • Fix shadow computation in SciVis renderer, objects behind light
    sources do not occlude anymore
  • No more image jittering with MPI rendering when no accumulation
    buffer is used
• Improved path tracer materials
  • Also support RGB eta/k for Metal
  • Added Alloy material, a "metal" with textured color
• Minimum required Embree version is now v2.15

OSPRay v1.4.0

• New adaptive mesh refinement (AMR) and unstructured tetrahedral volume types
• Dynamic load balancing is now implemented for the mpi_offload device
• Many improvements and fixes to the available path tracer materials
  • Specular lobe of OBJMaterial uses Blinn-Phong for more
    realistic highlights
  • Metal accepts spectral samples of complex refraction index
  • ThinGlass behaves consistent to Glass and can texture
    attenuation color
• Added Russian roulette termination to path tracer
• SciVis OBJMaterial accepts texture coordinate transformations
• Applications can now access depth information in MPI distributed uses of
  OSPRay (both mpi_offload and mpi_distributed devices)
• Many robustness fixes for both the mpi_offload and mpi_distributed
  devices through improvements to the mpi_common and mpi_maml
  infrastructure libraries
• Major sample app cleanups:
  • ospray_sg library is the new basis for building apps, which
    is a scenegraph implementation
  • Old (unused) libraries have been removed: miniSG, commandline,
    importer, loaders, and scripting
  • Some removed functionality (such as scripting) may be reintroduced in
    the new infrastructure later, though most features have
    remained and have been improved
  • Optional improved texture loading has been transitioned
    from ImageMagick to OpenImageIO
• Many cleanups, bug fixes, and improvements to ospray_common and
  other support libraries
• This will be the last release in which we support MSVC12
  (Visual Studio 2013). Future releases will require VS2015 or newer

OSPRay v1.3.1

• Improved robustness of OSPRay CMake find_package config
  • Fixed bugs related to CMake configuration when using
    the OSPRay SDK from an install
• Fixed issue with Embree library when installing with
  OSPRAY_INSTALL_DEPENDENCIES enabled

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

OSPRay v1.2.1

• Various bugfixes related to MPI distributed rendering, ISPC issues on Windows, and other build related issues.