The goal of ray tracing is to create images that are as accurate to real life as possible. Unfortunately, attaining this goal typically requires an extremely large amount of processing time. In this paper I propose a method for creating accurate soft shadows using graphics hardware to accelerate the process.

This paper presents a fast ray tracing procedure based on triangular division of the propagation environments. Unlike some accelerating methods based on pre-establishment of visibility, this method does not need the position information of base station and/or receiving antennas and is thus more general. Although the triangulation is in a two-dimensional plane, this method is suitable for three-...

Large-scale simulation and high quality of microwave brightness temperature imaging is the key technology for passive target detection. We applied the space meshing ray tracing method for brightness temperature tracing to establish a model of tracing and inversion. Simulated images were then compared with the measured images to verify the effectiveness of the proposed method. Results showed tha...

The graphics industry has advanced very far from the days of pixelated 2D images on small monitors. The main focus of graphics hardware work has been achieving the most realistic images while maintaining the interactive nature of realtime applications. This focus has matured and today’s modern graphics card is able to process millions of triangles and vertices to form complex 3D images with a v...

Ray tracing a volume scene graph composed of multiple point-based volume objects (PBVO) can produce high quality images with effects such as shadows and constructive operations. A naive approach, however, would demand an overwhelming amount of memory to accommodate all point datasets and their associated control structures such as octrees. This paper describes an out-of-core system for renderin...

In this paper we propose a simple but effective method to modify a BVH based on ray distribution for improved ray tracing performance. Our method starts with an initial BVH generated by any state-of-the-art offline algorithm. Then by traversing a small set of sample rays we collect statistics at each node of the BVH. Finally, a simple but ultra-fast BVH contraction algorithm modifies the initia...

We propose a high performance, GPU integrated, hardware ray tracing system. We present and make use of a new analysis of ray traversal in axis aligned bounding volume hierarchies. This analysis enables compact traversal hardware through the use of reduced precision arithmetic. We also propose a new cache based technique for scheduling ray traversal. With the addition of our compact fixed functi...

Ray tracing is one of the most elegant techniques in com-puter graphics. Many phenomena that are difficult orimpossible with other techniques are simple with ray trac-ing, including shadows, reflections, and refracted light.Ray directions, however, have been determined precisely,and this has limited the capabilities of ray tracing. Bydistributing the directions of the ra...

The importance of high-performance rendering of unstructured or curvilinear data sets has increased significantly, mainly due to its use in scientific simulations such as computational fluid dynamics and finite element computations. However, the unstructured nature of these data sets lead to rather slow implementations for ray tracing. The approaches discussed in this paper are fast and scalabl...