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Neil Bickford 2020-11-23 08:47:59 -08:00
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@ -11,11 +11,11 @@ ray tracing within an existing Vulkan sample, using the
## Setup ## Setup
To be able to compile and run those examples, please follow the [setup](docs/setup.md) instructions. Find more over [nvpro-samples](https://github.com/nvpro-samples/build_all) To be able to compile and run those examples, please follow the [setup](docs/setup.md) instructions. Find more over at [nvpro-samples](https://github.com/nvpro-samples/build_all).
## Tutorials ## Tutorials
The [first tutorial](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/) starts from a very simple Vulkan application. It loads a OBJ file and use the rasterizer to render it. The tutorial is adding, **step-by-step**, all what is needed to be able to ray traced the scene. The [first tutorial](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/) starts from a very simple Vulkan application. It loads a OBJ file and uses the rasterizer to render it. The tutorial then adds, **step-by-step**, all that is needed to be able to ray trace the scene.
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### Ray Tracing Tutorial: :arrow_forward: **[Start Here](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/)** :arrow_backward: ### Ray Tracing Tutorial: :arrow_forward: **[Start Here](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/)** :arrow_backward:
@ -23,23 +23,22 @@ The [first tutorial](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/
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## Extra Tutotrials ## Extra Tutorials
All other tutorials starts from the end of the _first_ ray tracing tutorial and provides also step-by-step instructions to modify, add methods and functions for that All other tutorials start from the end of the _first_ ray tracing tutorial and also provide step-by-step instructions to modify and add methods and functions for that extra section.
extra section.
Tutorial | Details Tutorial | Details
---------|-------- ---------|--------
![small](ray_tracing_anyhit/images/anyhit.png) | [Any Hit Shader](ray_tracing_anyhit)<br>Implements transparent materials by adding a new shader to the Hit group and using the material information to discard hits over time. Adding anyhit (.ahit) to the ray tracing pipeline. Randomly letting the ray hit or not which is making simple transparency. ![small](ray_tracing_anyhit/images/anyhit.png) | [Any Hit Shader](ray_tracing_anyhit)<br>Implements transparent materials by adding a new shader to the Hit group and using the material information to discard hits over time. Adds an anyhit (.ahit) shader to the ray tracing pipeline. Creates simple transparency by randomly letting the ray hit or not.
![small](ray_tracing_jitter_cam/images/antialiasing.png) | [Jitter Camera](ray_tracing_jitter_cam)<br> Anti-aliases the image by accumulating small variations of rays over time. Random ray direction generation. Read/write/accumulate final image ![small](ray_tracing_jitter_cam/images/antialiasing.png) | [Jitter Camera](ray_tracing_jitter_cam)<br> Anti-aliases the image by accumulating small variations of rays over time. Generates random ray directions. Read/write/accumulates the final image.
![img](ray_tracing_instances/images/instances.png) | [Thousands of Objects](ray_tracing_instances) <br> The current example allocates memory for each object, each of which has several buffers. This shows how to get around Vulkan's limits on the total number of memory allocations by using a memory allocator. Extend the limit of 4096 memory allocations. Using memory allocators: DMA, VMA ![img](ray_tracing_instances/images/instances.png) | [Thousands of Objects](ray_tracing_instances) <br> The current example allocates memory for each object, each of which has several buffers. This shows how to get around Vulkan's limits on the total number of memory allocations by using a memory allocator. Extends the limit of 4096 memory allocations. Uses these memory allocators: DMA, VMA.
![img](ray_tracing_reflections/images/reflections.png) | [Reflections](ray_tracing_reflections) <br> Reflections can be implemented by shooting new rays from the closest hit shader, or by iteratively shooting them from the raygen shader. This example shows the limitations and differences of these implementations. Calling traceRayEXT() from the closest hit shader (recursive). Adding more data to the ray payload to continue the ray from the raygen shader. ![img](ray_tracing_reflections/images/reflections.png) | [Reflections](ray_tracing_reflections) <br> Reflections can be implemented by shooting new rays from the closest hit shader, or by iteratively shooting them from the raygen shader. This example shows the limitations and differences of these implementations. Calls traceRayEXT() from the closest hit shader (recursive). Adds more data to the ray payload to continue the ray from the raygen shader.
![img](ray_tracing_manyhits/images/manyhits.png) | [Multiple Closest Hits Shader and Shader Records](ray_tracing_manyhits) <br> Multiple Closest Hits Shader and Shader Records. Explains how to add more closest hit shaders, choose which instance uses which shader, and add data per SBT that can be retrieved in the shader, and more. One closest hit shader per object. Sharing closest hit shaders for some object.Passing shader record to closest hit shader. ![img](ray_tracing_manyhits/images/manyhits.png) | [Multiple Closest Hits Shader and Shader Records](ray_tracing_manyhits) <br> Explains how to add more closest hit shaders, choose which instance uses which shader, add data per SBT that can be retrieved in the shader, and more. One closest hit shader per object. Sharing closest hit shaders for some objects. Passing a shader record to the closest hit shader.
![img](ray_tracing_animation/images/animation2.gif) | [Animation](ray_tracing_animation) <br> This tutorial shows how animating the transformation matrices of the instances (TLAS) and animating the vertices of an object (BLAS) in a compute shader, could be done. Refit of top level acceleration structure. Refit of bottom level acceleration structure. ![img](ray_tracing_animation/images/animation2.gif) | [Animation](ray_tracing_animation) <br> This tutorial shows how animating the transformation matrices of the instances (TLAS) and animating the vertices of an object (BLAS) in a compute shader could be done. Refitting top level acceleration structures. Refitting bottom level acceleration structures.
![img](ray_tracing_intersection/images/intersection.png) | [Intersectiom Shader](ray_tracing_intersection) <br> Adding thousands of implicit primitives and using an intersection shader to render spheres and cubes. The tutorial explains what is needed to get procedural hit group working. Intersection Shader. Sphere intersection. Axis aligned bounding box intersection. ![img](ray_tracing_intersection/images/intersection.png) | [Intersectiom Shader](ray_tracing_intersection) <br> Adding thousands of implicit primitives and using an intersection shader to render spheres and cubes. Explains what is needed to get procedural hit group working. Intersection Shaders. Sphere intersection. Axis aligned bounding box intersection.
![img](ray_tracing_callable/images/callable.png) | [Callable Shader](ray_tracing_callable) <br> Replacing if/else by callable shaders. The code to execute the lighting is done in separate callable shaders instead of been part of the code. Adding multiple callable shaders. Calling ExecuteCallableEXT from the closest hit shader. ![img](ray_tracing_callable/images/callable.png) | [Callable Shader](ray_tracing_callable) <br> Replacing if/else by callable shaders. The code to execute the lighting is done in separate callable shaders instead of being part of the main code. Adding multiple callable shaders. Calling ExecuteCallableEXT from the closest hit shader.
![img](ray_tracing_rayquery/images/rayquery.png) | [Ray Query](ray_tracing_rayquery) <br> Invoking ray intersection queries directly from the fragment shader to cast shadow rays. Ray tracing directly from the fragment shader. ![img](ray_tracing_rayquery/images/rayquery.png) | [Ray Query](ray_tracing_rayquery) <br> Invokes ray intersection queries directly from the fragment shader to cast shadow rays. Ray tracing directly from the fragment shader.
![img](ray_tracing_gltf/images/vk_ray_tracing_gltf_KHR_2.png) | [glTF Scene](ray_tracing_gltf) <br> Instead of loading separated OBJ objects, the example was modified to load glTF scene files containing multiple objects. This example is not about shading, but using more complex data than OBJ. ![img](ray_tracing_gltf/images/vk_ray_tracing_gltf_KHR_2.png) | [glTF Scene](ray_tracing_gltf) <br> Instead of loading separate OBJ objects, the example was modified to load glTF scene files containing multiple objects. This example is not about shading, but using more complex data than OBJ. However, it also shows a basic path tracer implementation.
![img](ray_tracing__advance/images/ray_tracing__advance.png) | [Advance](ray_tracing__advance) <br> An example combining most of the above samples in a single application. ![img](ray_tracing__advance/images/ray_tracing__advance.png) | [Advance](ray_tracing__advance) <br> An example combining most of the above samples in a single application.