gltf_raytrace

Vulkan-based glTF Renderer

Overview

This sample demonstrates loading and rendering glTF scenes using Vulkan. It utilizes tinyGLTF for scene loading, nvh::gltf::Scene for internal representation, and nvvkhl::SceneVk for GPU resource creation.

Key Components

• Scene Loading: tinyGLTF
• Internal Representation: nvh::gltf::Scene
• GPU Resource Management: nvvkhl::SceneVk
• Ray Tracing Acceleration Structures: nvvkhl::SceneRtx

Pipeline Architecture

• Single compute shader with ray query
• Shader Object and Push Descriptors implementation
• Optimized for scenes with moderate element count

Render Process

1. Update frame-specific buffers (e.g., camera data)
2. Push descriptors: TLAS, output image, scene data
3. Set push constants
4. Dispatch compute shader
5. Apply memory barrier for post-processing

Usage

Pass glTF scene path as an executable argument for custom scene loading.

Performance Considerations

Push Descriptors may generate warnings for scenes with numerous textures. Refer to pushDescriptorSet() implementation for details.