HIP RT SDK
HIP RT is a ray tracing library in HIP. The APIs are designed to be minimal and low level, making it easy to write a ray tracing application in HIP. We designed the library and APIs to be simple to use and integrate into any existing HIP applications. Although there are a few other ray tracing APIs, we designed HIP RT to be simpler and easier to use, so you do not need to learn many new kernel types.
Ray-custom primitive intersection
Ray mask to filter geometries
Several bounding volume hierarchy (BVH) options
Offline BVH load and store
HIP RT runs on AMD and NVIDIA GPUs. HIP and CUDA© APIs are dynamically loaded so you do not need to have these SDKs if your have these DLLs installed by the GPU driver package. Hardware accelerated ray tracing only works on AMD RDNA2-based GPUs.
It works on any AMD GPU which supports HIP. The supported AMD GPU architecture families are:
Navi2x (Radeon™ RX 6000 series)
Navi1x (Radeon™ RX 5000 series)
You need an AMDGPU driver newer than 21.40. However, we recommend using 21.50 or newer.
The header and the library which you need to download from HIP RT product page
Tutorial source code
Building the Tutorial
Сlone the repository, then init, and update the submodules if you didn’t clone with
git submodule init
git submodule update
Download the HIP RT SDK from HIP RT product page, copy hiprt directory to here.
Run premake like this on Windows, which will generate a solution for Visual Studio 2019:
Open the solution, compile & run. These tutorials are made to run on both AMD and NVIDIA by specifying the device index.
Introduction to the HIP RT APIs
The minimum example can be found at tutorials/00_context_creation/main.cpp. On AMD platforms, you need to create a HIP context and device to initialize
hiprt using hiprtCreateContext() by passing hiprtContextCreationInput object where you need to set the native API context, device, and device type (HIP or CUDA).
An example of a minimum kernel can be found at here. This is a simple HIP kernel that we are passing
hiprtGeometry to. To perform an intersection test, simply fill in hiprtRay, then create a hiprtGeomTraversalClosest object, then call
getNextHit(). It is that simple.
Introducing HIP RT – a ray tracing library in HIP and GPUOpen Blog.