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Using final KHR ray tracing extension: VK_KHR_acceleration_structure, VK_KHR_ray_tracing_pipeline and VK_KHR_ray_query

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mklefrancois 2020-11-23 11:33:51 +01:00
parent 7179569ec3
commit b26ff92473
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22
ray_tracing_callable/README.md
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@ -101,9 +101,9 @@ m_device.destroy(call2);
Here are the source of all shaders
* [light_point.rcall](https://github.com/nvpro-samples/vk_raytracing_tutorial_KHR/blob/master/ray_tracing_callable/shaders/light_point.rcall)
* [light_spot.rcall](https://github.com/nvpro-samples/vk_raytracing_tutorial_KHR/blob/master/ray_tracing_callable/shaders/light_spot.rcall)
* [light_inf.rcall](https://github.com/nvpro-samples/vk_raytracing_tutorial_KHR/blob/master/ray_tracing_callable/shaders/light_inf.rcall)
* [light_point.rcall](shaders/light_point.rcall)
* [light_spot.rcall](shaders/light_spot.rcall)
* [light_inf.rcall](shaders/light_inf.rcall)
### Passing Callable to traceRaysKHR
@ -116,19 +116,19 @@ In `HelloVulkan::raytrace()`, we have to tell where the callable shader starts.
Therefore, the callable starts at `4 * progSize`
~~~~ C++
vk::DeviceSize callableGroupOffset = 4u * progSize; // Jump over the previous shaders
vk::DeviceSize callableGroupStride = progSize;
std::array<stride, 4> strideAddresses{
stride{sbtAddress + 0u * progSize, progSize, progSize * 1}, // raygen
stride{sbtAddress + 1u * progSize, progSize, progSize * 2}, // miss
stride{sbtAddress + 3u * progSize, progSize, progSize * 1}, // hit
stride{sbtAddress + 4u * progSize, progSize, progSize * 1}}; // callable
~~~~
Then we can call `traceRaysKHR`
~~~~ C++
const vk::StridedBufferRegionKHR callableShaderBindingTable = {
m_rtSBTBuffer.buffer, callableGroupOffset, progSize, sbtSize};
cmdBuf.traceRaysKHR(&raygenShaderBindingTable, &missShaderBindingTable, &hitShaderBindingTable,
&callableShaderBindingTable, //
m_size.width, m_size.height, 1); //
cmdBuf.traceRaysKHR(&strideAddresses[0], &strideAddresses[1], &strideAddresses[2],
&strideAddresses[3], //
m_size.width, m_size.height, 1); //
~~~~
## Calling the Callable Shaders