A Data Structure for Artificial Terrain Generation
作者:
A. R. Dixon,
G. H. Kirby,
D. P. M. Wills,
期刊:
Computer Graphics Forum
(WILEY Available online 1994)
卷期:
Volume 13,
issue 1
页码: 37-48
ISSN:0167-7055
年代: 1994
DOI:10.1111/1467-8659.1310037
出版商: Blackwell Science Ltd
关键词: fractal geometry;fractional Brownian motion;random midpoint displacement;artificial terrain generation;polyhedral data structure
数据来源: WILEY
摘要:
AbstractThis paper addresses the problems of maintaining the consistency of spatial data under recursive subdivision algorithms for artificial terrain generation. Fractal modelling techniques are outlined, with particular reference to those based on fractional Brownian motion, and included is a brief history of recursive subdivision techniques. Existing polyhedral data structures are reviewed and shown to be inadequate for maintenance of consistency as polygons are subdivided. A new edge‐based data structure is presented which provides for the efficient use and consistent storage of spatial data under these conditions. The data structure is applicable to polygons of any order and allows neighbouring polygons of different order to be stored and subdivided. Artificial terrain is demonstrated from subdivision of the hexagon, of the quadrilateral and of a combination of hexagons, quadrilaterals and triangle
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