Rasterization hardware provides interactive frame rates for rendering dynamic scenes, but lacks the ability of ray tracing required for efficient global illumination simulation. Existing ray tracing based methods yield high quality renderings but are far too slow for interactive use. We present a new parallel global illumination algorithm that perfectly scales, has minimal preprocessing and com...

This paper proposes a general matrix iterative model to represent a range of dynamic load balancing for MIMD parallel ray tracing. Diierent measure parameters are expressed only on theoretical data. A parallel ray tracing application is implemented. Both results obtained from the model and from parallel implementation are used to compare diierent load balancing strategies and validate the model...

Objects deened by parametric surfaces are a compact representation delivering continuous deened accuracy. For the sake of speed, a discretization towards triangles is inevitable, which can be done adaptively to the projective properties. Simplicial complexes suit perfectly to store the adaptive discretization. Based on adaptive simplicial complexes we propose a modiied ray tracing algorithm. Th...

Sound propagation encompasses various acoustic phenomena including reverberation. Current virtual acoustic methods ranging from parametric filters to physically accurate solvers can simulate reverberation with varying degrees of fidelity. The effects of reverberant sounds generated using different propagation algorithms on acoustic distance perception are investigated. In particular, two classe...

We present a spatial index structure to accelerate ray tracing on GPUs. It is a flat, non-hierarchical spatial subdivision of the scene into axis aligned cells of varying size. In order to construct it, we first nest an octree into each cell of a uniform grid. We then apply two optimization passes to increase ray traversal performance: First, we reduce the expected cost for ray traversal by mer...

ID: 18548 Title: A Splatting Method to Generate DRRs for Deformed CT Volume Purpose: To develop an efficient algorithm for generating high-quality digitally reconstructed radiographs (DRRs) for regularly and irregularly sampled volumes based on a splatting method with dynamic elliptical Gaussian kernels, and to evaluate this method using ray tracing. Methods: The traditional ray tracing method,...

The Z6 output sensor is the final PHELIX diagnostic prior to the target area Z6. During the first months of 2007 ray tracing calculations for the diagnostic system were done and the design was improved in efficiency. The pulse energy of a full system shot is up to 1 kJ with a maximum beam diameter of 280 mm. A test shot compared to a full system shot has a dynamic range of 10 in power. The diag...