Author: diligentadmin January 3, 2021 3 Comments

The latest release v2.4.g adds support for arguably the most innovative GPU capability of recent years: hardware-accelerated ray tracing. Ray tracing is supported in D3D12 and Vulkan backends and is exposed through common easy-to use yet fully exhaustive API: exactly the same host code works in both backends. Similar to other shader types, ray-tracing shaders authored in HLSL will work in both backends verbatim. Vulkan backend also supports GLSL as well as SPIRV bytecode.

A new tutorial demonstrates how ray tracing API in Diligent Engine can be used to simulate physics-based light transport in a scene to render soft shadows, multiple-bounce reflections and refractions, and dispersion.

API Changes

• Enabled ray tracing (API Version 240080)
• Added IDeviceContext::GetFrameNumber method (API Version 240079)
• Added ShaderResourceQueries device feature and EngineGLCreateInfo::ForceNonSeparablePrograms parameter (API Version 240078)
• Renamed USAGE_STATIC to USAGE_IMMUTABLE (API Version 240077)
• Renamed static samplers into immutable samplers (API Version 240076)
  • Renamed StaticSamplerDesc  -> ImmutableSamplerDesc
  • Renamed PipelineResourceLayoutDesc::NumStaticSamplers  -> PipelineResourceLayoutDesc::NumImmutableSamplers
  • Renamed PipelineResourceLayoutDesc::StaticSamplers  -> PipelineResourceLayoutDesc::ImmutableSamplers

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• Refactored pipeline state creation (API Version 240075)
  • Replaced PipelineStateCreateInfo  with GraphicsPipelineStateCreateInfo and ComputePipelineStateCreateInfo
  • Replaced IRenderDevice::CreatePipelineState  with IRenderDevice::CreateGraphicsPipelineState  and IRenderDevice::CreateComputePipelineState
  • pVS , pGS , pHS , pDS , pPS , pAS , pMS were moved from GraphicsPipelineDesc  to GraphicsPipelineStateCreateInfo
  • GraphicsPipelineDesc GraphicsPipeline  was moved from PipelineStateDesc  to GraphicsPipelineStateCreateInfo
  • pCS  is now a member of ComputePipelineStateCreateInfo, ComputePipelineDesc was removed
  • Added IPipelineState::GetGraphicsPipelineDesc method

Old API for graphics pipeline initialization:

New API for graphics pipeline initialization:

 

Old API for compute pipeline initialization:

New API for compute pipeline initialization:

 

• Added ShaderInt8, ResourceBuffer8BitAccess, and UniformBuffer8BitAccess device features. (API Version 240074)
• Added ShaderFloat16, ResourceBuffer16BitAccess, UniformBuffer16BitAccess, and ShaderInputOutput16 device features. (API Version 240073)