The HERO Algorithm for Ray-Tracing Octrees
نویسندگان
چکیده
An algorithm is presented for rapid traversal of octree data structures, in order to enhance the speed of ray tracing for scenes of high complexity. At each level of the octree, the algorithm generates the addresses of child voxels in the order they are penetrated by the ray. This requires only a few arithmetic operations and simple logical operations. A depth-first search of the tree is used to yield the first terminal voxel hit by the ray, thus hidden objects are not processed. The algorithm is designed specifically for implementation as HERO: A Hardware Enhancer for Ray-tracing Octrees.
منابع مشابه
Cost prediction for ray shooting in octrees
The ray shooting problem arises in many different contexts and is a bottleneck of ray tracing in computer graphics. Unfortunately, theoretical solutions to the problem are not very practical, while practical methods offer few provable guarantees on performance. Attempting to combine practicality with theoretical soundness, we show how to provably measure the average performance of any ray-shoot...
متن کاملAdaptive Enumeration of Implicit Surfaces with Affine Arithmetic
We discuss adaptive enumeration and rendering methods for implicit surfaces , using octrees computed with aane arithmetic, a new tool for range analysis. AAne arithmetic is similar to standard interval arithmetic, but takes into account correlations between operands and sub-formulas, generally providing much tighter bounds for the computed quantities. The resulting octrees are accordingly much ...
متن کاملA Survey of Octree Volume Rendering Methods
Octrees are attractive data structures for rendering of volumes, as they provide simultaneously uniform and hierarchical data encapsulation. They have been successfully applied to compression, simplification, and extraction as well as rendering itself. This paper surveys and compares existing works employing octrees for volume rendering. It focuses specifically on extraction, direct volume rend...
متن کاملAn Efficient Algorithm for General 3D-Seismic Body Waves (SSP and VSP Applications)
Abstract The ray series method may be generalized using a ray centered coordinate system for general 3D-heterogeneous media. This method is useful for Amplitude Versus Offset (AVO) seismic modeling, seismic analysis, interpretational purposes, and comparison with seismic field observations.For each central ray (constant ray parameter), the kinematic (the eikonal) and dynamic ray tracing system ...
متن کاملOctrees with near optimal cost for ray-shooting
Predicting and optimizing the performance of ray shooting is a very important problem in computer graphics due to the severe computational demands of ray tracing and other applications, e.g., radio propagation simulation. Aronov and Fortune were the first to guarantee an overall performance within a constant factor of optimal in the following model of computation: build a triangulation compatib...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1989