Awesome
VK_RAYTRACE
This project is a glTF 2.0 sample viewer using Vulkan ray tracing. It follows the ray tracing tutorial and combines all chapters into a single example.
The lighting equation is based on:
- glTF PBR reference implementation from Khronos.
- Disney PBR
The rendering pipeline can be switched from:
- Ray Tracing Pipeline: RayGen, Closest-Hit, Miss, Any-Hit model
- Ray Query: Compute shader using Ray Queries
Features
- Load glTF 2.0 files ascii and binary using tiny glTF
- Support for full node hierarchy
- Full implementation of metallic-roughness and specular-glossiness
- IBL lighting using importance light sampling
- Alpha blend and cut-out
- Texture transforms and samplers
Attributes
- Normal : create geometric normal when not present
- Texture coords : only set 0, project cube map when text coords are missing.
- Tangents : generate tangents and bitangent when missing.
- Color : default (1,1,1,1)
Extensions
- KHR_lights_punctual (some support)
- KHR_materials_pbrSpecularGlossiness
- KHR_materials_clearcoat
- KHR_materials_unlit
- KHR_texture_transform
- KHR_materials_anisotropy
- KHR_materials_transmission
- KHR_materials_sheen (some support)
Usage
Controls
| Action | Description |
|---|---|
LMB | Rotate around the target |
RMB | Dolly in/out |
MMB | Pan along view plane |
LMB + Shift | Dolly in/out |
LMB + Ctrl | Pan |
LMB + Alt | Look around |
Mouse wheel | Dolly in/out |
Mouse wheel + Shift | Zoom in/out (FOV) |
Space | Set interest point on the surface under the mouse cursor. |
F10 | Toggle UI pane. |
Change glTF model
- Drag and drop glTF files (
.gltfor.glb) into viewer
Change HDR lighting
- Drag and drop HDR files (
.hdr) into viewer
Setup
git clone --recursive --shallow-submodules https://github.com/nvpro-samples/nvpro_core.git
git clone https://github.com/nvpro-samples/vk_raytrace.git
Other
Tags:
- raytracing, GLTF, HDR, tonemapper, picking, BLAS, TLAS, PBR material
Extensions:
- VK_KHR_RAY_QUERY_EXTENSION_NAME
- VK_KHR_RAY_TRACING_PIPELINE_EXTENSION_NAME
- VK_KHR_ACCELERATION_STRUCTURE_EXTENSION_NAME
- VK_KHR_SHADER_CLOCK_EXTENSION_NAME
- VK_KHR_MAINTENANCE3_EXTENSION_NAME
- VK_KHR_PIPELINE_LIBRARY_EXTENSION_NAME
- VK_KHR_DEFERRED_HOST_OPERATIONS_EXTENSION_NAME
- VK_KHR_BUFFER_DEVICE_ADDRESS_EXTENSION_NAME
- VK_EXT_SCALAR_BLOCK_LAYOUT_EXTENSION_NAME
- VK_EXT_DESCRIPTOR_INDEXING_EXTENSION_NAME
- VK_KHR_GET_MEMORY_REQUIREMENTS_2_EXTENSION_NAME
- VK_KHR_DEDICATED_ALLOCATION_EXTENSION_NAME
- VK_KHR_SWAPCHAIN_EXTENSION_NAME
- VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME
- VK_EXT_DEBUG_UTILS_EXTENSION_NAME
- VK_KHR_SURFACE_EXTENSION_NAME
Links
Test Scenes
| Model | Link |
|---|---|
 | 2 Cylinder Engine |
 | Alpha Blending |
 | Anisotropy |
 | Antique Camera |
 | Boom Box |
 | Carbon Fiber |
 | Clear Coat |
 | Corset |
 | Damaged Helmet |
 | Flight Helmet |
 | Metal Rough Spheres |
 | Punctual Light |
 | SciFi |
 | SpecGlossVsMetalRough |
 | Unlit |
 | Transmission |
 | Box Vertex Color |