Hierarchical Beam Tracing and Packet Compression for Ray Tracing Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ray tracing in graphics rendering is computationally complex and resource-intensive, limiting real-time solutions due to the need to determine intersections of rays with scene geometry, which is inefficient and demanding.
Innovation Solution
Implementing hierarchical beam tracing and ray tracing packet compression techniques, including the use of bounding volume hierarchies and lossy and lossless compression methods to reduce data transmission and processing requirements, allowing for more efficient traversal and intersection operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional ray tracing is used to determine intersections of rays with scene geometry, then visibility and global illumination can be computed, but computational complexity and resource consumption increase significantly
Solution Approach 1:
The patent segments the scene geometry into hierarchical bounding volume structures (BVH), dividing the complex intersection problem into manageable levels of abstraction. Rays are first tested against coarse bounding volumes, then progressively refined to intersecting primitives only, avoiding exhaustive ray-primitive testing across the entire scene.
Solution Approach 2:
The patent performs preliminary organization of scene geometry into bounding volume hierarchies before ray tracing execution. This pre-computed spatial structure enables efficient ray traversal by eliminating large portions of the scene that cannot possibly intersect the ray, reducing the computational burden during actual rendering.
2Measurement precision
If exhaustive ray-primitive intersection testing is performed, then accurate visibility determination is achieved, but processing time and resource requirements increase
Solution Approach 1:
The patent segments rays into coherent bundles or pencils that share common origins or directions, allowing simultaneous processing of multiple rays through the same BVH structure. This segmentation enables parallelization and reduces redundant computations across independent ray trajectories.
Solution Approach 2:
The patent performs partial intersection testing by stopping ray traversal when the first intersecting primitive is found (for visibility determination), rather than testing all primitives. This partial action suffices for many rendering applications where only the nearest surface is needed, significantly reducing processing requirements.
3Measurement precision
If detailed scene geometry data is transmitted and processed, then rendering accuracy is maintained, but data transmission and memory requirements increase
Solution Approach 1:
The patent extracts only the essential geometric information needed for intersection testing into compact BVH structures, separating this from full scene geometry data. Only the extracted spatial hierarchy and minimal primitive descriptors are transmitted and processed, while complete geometry definitions can remain stored elsewhere or be generated on-demand.
Data Source
AI summary
An apparatus and method for compressing ray tracing data prior to transmission between nodes. For example, one embodiment of an apparatus comprises: a first node comprising a first ray tracing engine, the first node communicatively coupled to a second node comprising a second ray tracing engine; first compression circuitry coupled to the first ray tracing engine, the first compression circuitry to perform compression on ray tracing data of the first ray tracing engine to produce a first compressed stream of ray tracing data; and interface circuitry to transmit the first compressed stream of ray tracing data from the first node to the second node.