MDL SDK 2020.0.1 (327300.3640): 30 Mar 2020

ABI compatible with the MDL SDK 2020.0.1 (327300.3640) binary release
(see https://developer.nvidia.com/mdl-sdk)

Added and Changed Features

• General

  • The standalone tools mdlm and i18n have been extended to support Unicode package/module
    names.
  • On Windows, we recommend Visual Studio 2017 or 2019. Visual Studio 2015 is still the minimum
    requirement.

• MDL SDK examples

  • example_dxr:
    • Enhanced dependency tracking when reloading materials to also update indirectly affected
      materials.
    • Only the compiled material hash is considered to detect reusable generated code which
      allows to reuse existing materials for structurally equal instances.
    • Skip format conversion for multi-scatter lookup data.
    • Added support for larger glTF scenes up to 2GB.
    • Improved cleanup when loading erroneous scenes.

Fixed Bugs

• General

  • Fixed handling of resources inside function bodies. Previously, these resources were not
    found under some conditions, causing black textures for instance.
  • Fixed too strict error checks for creation of function calls of the array index operator, the
    ternary operator, and the cast operator.
  • Fixed creation of variants without specifying any annotations where the annotations of the
    prototype were erroneously copied to the variants.
  • Fixed loading of string-based modules with absolute file paths for resources.
  • Fixed documentation of generated code interfaces: The results of eval functions are
    output-only, not in/out.

• MDL Compiler and Backends

  • Fixed a subtle bug in one of the code caches, which caused ignored argument changes under
    some complex conditions. Typically, boolean parameters were vulnerable, but could happen to
    parameters of any type.
  • Fixed MDL archive tool failures with Unicode package names. The MDL version of such archives
    is now automatically set to MDL 1.6 as lowest necessary version.
  • A bug in the resource handling was fixed that previously caused resources to be resolved and
    loaded more that once, possibly leading to failures if search paths had been changed in
    between.
  • Fixed the MDL core compiler's analysis pass. Some analysis info was computed but not
    annotated, causing JIT failures on functions that consists of a single expression body only.