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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
80 changed files with 2446 additions and 2351 deletions
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14
ray_tracing_manyhits/README.md
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@ -19,14 +19,14 @@ Then you can change the `helloVk.loadModel` calls to the following:
~~~~ C++
// Creation of the example
helloVk.loadModel(nvh::findFile("media/scenes/wuson.obj", defaultSearchPaths),
helloVk.loadModel(nvh::findFile("media/scenes/wuson.obj", defaultSearchPaths, true),
nvmath::translation_mat4(nvmath::vec3f(-1, 0, 0)));
HelloVulkan::ObjInstance inst;
inst.objIndex = 0;
inst.transform = nvmath::translation_mat4(nvmath::vec3f(1, 0, 0));
inst.transformIT = nvmath::transpose(nvmath::invert(inst.transform));
helloVk.m_objInstance.push_back(inst);
helloVk.loadModel(nvh::findFile("media/scenes/plane.obj", defaultSearchPaths));
helloVk.loadModel(nvh::findFile("media/scenes/plane.obj", defaultSearchPaths, true));
~~~~
## Adding a new Closest Hit Shader
@ -60,7 +60,7 @@ This new shader needs to be added to the raytracing pipeline. So, in `createRtPi
~~~~ C++
vk::ShaderModule chit2SM =
nvvk::createShaderModule(m_device, //
nvh::loadFile("shaders/raytrace2.rchit.spv", true, paths));
nvh::loadFile("shaders/raytrace2.rchit.spv", true, paths, true));
~~~~
Then add a new hit group group immediately after adding the first hit group:
@ -103,7 +103,7 @@ struct sceneDesc
};
~~~~
:warning: **Note:**
**Note:**
The solution will not automatically recompile the shaders after this change to `wavefront.glsl`; instead, you will need to recompile all of the SPIR-V shaders.
### `hello_vulkan.cpp`
@ -131,7 +131,7 @@ When creating the [Shader Binding Table](https://www.khronos.org/registry/vulkan
This information can be used to pass extra information to a shader, for each entry in the SBT.
:warning: **Note:**
**Note:**
Since each entry in an SBT group must have the same size, each entry of the group has to have enough space to accommodate the largest element in the entire group.
The following diagram represents our current SBT, with the addition of some data to `HitGroup1`. As mentioned in the **note**, even if
@ -184,7 +184,7 @@ void main()
}
~~~~
:warning: **Note:**
**Note:**
Adding a new shader requires to rerun CMake to added to the project compilation system.
@ -335,7 +335,7 @@ Finally, we need to add the new entry as well at the end of the buffer, reusing
pBuffer += hitSize;
~~~~
:warning: **Note:**
**Note:**
Adding entries like this can be error-prone and inconvenient for decent
scene sizes. Instead, it is recommended to wrap the storage of handles, data,
and size per group in a SBT utility to handle this automatically.