DirectX Raytracing (DXR) is a feature of Microsoft's DirectX that allows for hardware real-time raytracing, a significant advancement in computer graphics first seen on the consumer level in GPUs such as the Nvidia GeForce 20 series announced in 2018. DXR will not be released as part of a new version of DirectX but rather as a compatible extension to DirectX 12.
Windows 10 October 2018 update includes the public release of DirectX Raytracing.
- An "acceleration structure" which is an object that holds a representation of a 3D environment so that objects contained in the scene can be found quickly by the GPU
- A command list method called DispatchRays that controls raytracing
- HLSL shader types appropriate for raytracing
- The Raytracing pipeline state, comparable to the existing Graphics and Compute pipeline states
- Microsoft developer blog on DirectX Raytracing
- DirectX Raytracing and the Windows 10 October 2018 Update
- Nvidia blog about raytracing vs. rasterization
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