منابع مشابه
Adaptive Ray-Tracing on Spatial Patches
Spatial patch is a new kind of rendering primitive that allows convenient and compact representation of surfaces for real-life 3D objects. In [1] and [2], several algorithms for z-buffer visualization of spatial patches are presented. However, zbuffering approach cannot provide photo-realistic quality of rendering. On the contrary, such quality can be obtained by means of ray tracing – a well-k...
متن کاملAVLSI Chip for Ray Tracing Bicubic Patches
A VLSI chip for ray tracing bicubic patches in Bezier form is explored. The purpose of the chip is to calculate the intersection point of a ray with the bicubic patch to a specified level of accuracy, returning the location of the intersection on the patch and on the ray. This is done by computing the intersection of the ray with a bounding volume of the patch and repeatedly subdividing the pat...
متن کاملParametric Height Field Ray Tracing
Height field ray tracing is one approach to photorealistic visualization of terrain. Parametric methods, which fall into a new class of height field ray trace methods, are introduced 1. The height field is horizontally sliced into evenly spaced cross-sections. For each cross-section, the Euclidean distance from each point to the nearest point where the slice cuts through terrain is computed off...
متن کاملRay Tracing of Parametric Surfaces : B
Parametric surfaces are a powerful and popular modeling tool in computer graphics and computer aided design, while ray tracing is a versatile and very popular rendering technique. As a result, there is a strong incentive in developing fast, accurate, and reliable algorithms for solving the ray-patch-intersection problem. In this paper, we discuss and compare three recent geometric algorithms fo...
متن کاملRay Tracing Rational B-Spline Patches in VLSI
Rational B-spline surfaces make it possible to merge the concepts of freeform surfaces and that of surfaces described by rational polynomials espe cially conic sections. For ray tracing it is crucial to determine the intersection between ray and object. Therefore an algorithm is developed that is suitable for a VLSI implementation. Some alternatives for the implementation of this algorithm are...
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ژورنال
عنوان ژورنال: ACM SIGGRAPH Computer Graphics
سال: 1982
ISSN: 0097-8930
DOI: 10.1145/965145.801287