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MDL SDK 2019.1.4 (317500.5028): 27 Aug 2019
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@lkettnerNV lkettnerNV released this 30 Sep 15:00
· 38 commits to master since this release
2019.1.4
5b1ab6f

ABI compatible with the MDL SDK 2019.1.4 (317500.5028) binary release
(see https://developer.nvidia.com/mdl-sdk)

Added and Changed Features

  • General

    • A new function mi::neuraylib::IValue_texture::get_gamma() has been added.
    • The following new functions have been added to the target code generation:
      • mi::neuraylib::ITarget_code::execute_bsdf_auxiliary()
      • mi::neuraylib::ITarget_code::execute_edf_auxiliary()
    • A new function mi::neuraylib::ICompiled_material::get_surface_opacity()
      has been added.

  • MDL Compiler and Backends

    • Code generation for auxiliary methods has been added on distribution
      functions for potential use in AI-denoising.
    • The spectral color constructor color(float[<N>],float[N]),
      math::emission_color(), and math::blackboby() are now supported in the
      JIT backend.
    • More optimizations regarding elemental constructors in the DAG
      representation have been implemented.
    • Map XOR operators on Boolean values to NOT-EQUAL in the HLSL backend to be
      compatible to the SLANG compiler.

  • MDL SDK examples

    • The example programs example_dxr and example_df_cuda have been extended
      to illustrate the use of auxiliary functions.
    • A modified version of example_dxr has been added to illustrate the usage
      of MDL in a multi-threaded context.
    • Camera controls have been improved and new options have been added to
      the example program example_dxr.

Fixed Bugs

  • General

    • The export of MDLE files from in-memory MDL modules has been fixed.

  • MDL Compiler and Backends

    • Temporary exponential creation of DAG nodes when using derivatives has
      been fixed.
    • Code generation of parameters reused multiple times in a derivative context
      has been fixed.
    • Relative imports including "." and ".." have been fixed.
    • Duplicate global variables in generated HLSL code have been fixed.
    • Invalid code generation for HLSL for special materials has been fixed.
    • Indeterministic rare compilation errors regarding unknown functions have
      been fixed.
    • Indeterministic rare hangs during compilation with multiple threads have
      been fixed.
    • Under rare condition the code cache could return HLSL code instead of PTX
      and vice versa. This has been fixed.
    • The code cache that was not working under several conditions has been fixed.
    • The handling of the ?: operator on arrays inside the DAG representation
      has been fixed such that it computes the right name now.
    • The handling of unresolved resource paths in the target code has been fixed.
      Previously all resources were mapped to index 1.
    • A crash in the code generator when handling uniform matrix expressions with
      automatic derivatives enabled has been fixed.
    • A crash in the HLSL code generator for non-default optimization levels has
      been fixed.
    • A crash when adding distribution functions to a link unit after adding non-
      distribution functions has been fixed.
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