Ray Traversal Core for Acceleration Structure Overlap Optimization
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Solution Overview
Problem
The ray tracing approach requires significant computational resources due to the need for generating acceleration structures, traversing them, and conducting intersection tests, which hampers high-speed rendering.
Innovation Solution
A ray tracing apparatus and method that includes a traversal core to detect intersecting nodes with a generated ray and determine overlap regions, allowing for efficient calculation of hit points and omitting unnecessary traversals, thereby reducing computational load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ray tracing approach is used to generate high-quality images by reflecting physical properties of light, then image quality is improved, but computational resources required increase significantly
Solution Approach 1:
The scene is divided into multiple objects, and each object is further divided into primitive portions. An acceleration structure is constructed to organize these segmented elements hierarchically, enabling efficient traversal and intersection testing while maintaining high image quality through detailed geometric representation.
Solution Approach 2:
An acceleration structure is pre-generated from the scene objects before ray tracing begins. This preliminary organization of geometric data into a hierarchical structure with bounding boxes and primitive portions enables faster intersection testing during rendering, reducing the computational burden while maintaining image quality.
2Measurement precision
If acceleration structure is generated by spatially splitting scene objects, then intersection test accuracy is improved, but processing time increases
Solution Approach 1:
The acceleration structure segments the scene into hierarchical levels: scene objects are divided into bounding boxes, which are further divided into primitive portions. This segmentation enables precise intersection testing by allowing the traversal algorithm to quickly eliminate non-intersecting regions while maintaining accuracy for regions that do intersect.
Solution Approach 2:
The acceleration structure introduces a hierarchical spatial dimension by organizing primitives into bounding boxes and grouping bounding boxes into scene objects. This multi-level spatial organization transforms the intersection testing problem from checking all primitives against all rays to traversing a hierarchical structure, significantly reducing processing time while maintaining accuracy.
3Measurement precision
If traversal is conducted on acceleration structure for each ray, then intersection detection accuracy is improved, but computational load increases
Solution Approach 1:
The acceleration structure is pre-constructed with organized bounding boxes and primitive portions before ray tracing begins. This preliminary organization allows the traversal algorithm to efficiently navigate the hierarchical structure during intersection detection, reducing computational load while maintaining accurate intersection detection through systematic traversal of the pre-organized data structure.
Solution Approach 2:
The traversal process is segmented into hierarchical levels: first traversing scene objects, then bounding boxes, and finally primitive portions. This segmentation of the traversal process enables the algorithm to quickly eliminate large non-intersecting regions at higher hierarchical levels before conducting detailed intersection tests at lower levels, reducing overall computational load while maintaining detection accuracy.
Data Source
AI summary
A ray tracing apparatus includes a traversal (TRV) core configured to traverse an acceleration structure (AS) to detect a first node and a second node, which intersect with a generated ray and have a determined same parent node, and to determine whether the ray intersects with an overlap region where a first bounding box corresponding to the first node overlaps a second bounding box corresponding to the second node; and, an intersection test (IST) determiner configured to calculate a first hit point where the ray intersects with a primitive belonging to the first node, which is a closer node to a view point of the ray among the first node and the second node, and to determine a final hit point of the ray based on a result of the determining of whether the ray intersects with respect to an overlap region, by the TRV core.