Ray‐Tracing Program for Computing Transmission‐Loss Contours

Two Optimization Methods for Raytracing Two Optimization Methods for Raytracing

Raytracing is a method to produce photo-realistic pictures. For each pixel of an image one ray is shot to nd the object, which determines the color of the pixel. Rays are also used to simulate shadows and reeections. Previously bounding volume hierarchies have been used to speed raytracing. A new method to speed the traversal of a bounding volume hierarchy is presented. Optimisation methods to ...

An Algorithm for Progressive Raytracing

Progressive generation of images is one of the important research areas of computer graphics. Especially, when the image generation takes too much time the users want to see the progress in the rendering process. The user may decide either to continue the rendering process or stop the rendering according to the current view of the image. This may be due to the fact that either the image is prod...

Computing Depth Contours with Graphics Hardware

Comparative epistemology: contours of a research program.

This article addresses the question whether and how literary documents can be used to further our understanding of a number of key issues on the agenda of the philosophy of biology such as "complexity" and "reductionism". Kant already granted a certain respectability to aesthetical experiences of nature in his third Critique. Subsequently, the philosophical movement known as phenomenology often...

I/O-Efficient Algorithms for Computing Contours on a Terrain

A terrain M is the graph of a bivariate function. We assume that M is represented as a triangulated surface with N vertices. A contour (or isoline) of M is a connected component of a level set of M. Generically, each contour is a closed polygonal curve; at “critical” levels these curves may touch each other or collapse to a point. We present I/Oefficient algorithms for the following two problem...