{"title":"构造分形和其他图形的新方法","authors":"J. Helmstedt","doi":"10.3888/TMJ.13-4","DOIUrl":null,"url":null,"abstract":"The simplest type of Lindenmeyer or L-system can be used to construct graphics as follows. Two polygonal arcs A1 and A2 are chosen, such that the length of each line segment is an integral multiple of a fixed positive number, l, and if a line segment has length n l, then it is treated as a polygonal arc consisting of n line segments of equal length. Also, the angle between each pair of adjacent line segments is an integral multiple of a fixed angle, d. A1 is usually chosen as a single line segment or as the boundary of a regular polygon. Each line segment of A1 is replaced by a copy of A2, and then each line segment of the resulting polygonal arc is replaced by a copy of A2, and so on. The constructions are achieved by interpreting certain replacement rules for sequences as replacement rules for line segments [1].","PeriodicalId":91418,"journal":{"name":"The Mathematica journal","volume":"13 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2011-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"A New Method of Constructing Fractals and Other Graphics\",\"authors\":\"J. Helmstedt\",\"doi\":\"10.3888/TMJ.13-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The simplest type of Lindenmeyer or L-system can be used to construct graphics as follows. Two polygonal arcs A1 and A2 are chosen, such that the length of each line segment is an integral multiple of a fixed positive number, l, and if a line segment has length n l, then it is treated as a polygonal arc consisting of n line segments of equal length. Also, the angle between each pair of adjacent line segments is an integral multiple of a fixed angle, d. A1 is usually chosen as a single line segment or as the boundary of a regular polygon. Each line segment of A1 is replaced by a copy of A2, and then each line segment of the resulting polygonal arc is replaced by a copy of A2, and so on. The constructions are achieved by interpreting certain replacement rules for sequences as replacement rules for line segments [1].\",\"PeriodicalId\":91418,\"journal\":{\"name\":\"The Mathematica journal\",\"volume\":\"13 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2011-02-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The Mathematica journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3888/TMJ.13-4\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Mathematica journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3888/TMJ.13-4","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A New Method of Constructing Fractals and Other Graphics
The simplest type of Lindenmeyer or L-system can be used to construct graphics as follows. Two polygonal arcs A1 and A2 are chosen, such that the length of each line segment is an integral multiple of a fixed positive number, l, and if a line segment has length n l, then it is treated as a polygonal arc consisting of n line segments of equal length. Also, the angle between each pair of adjacent line segments is an integral multiple of a fixed angle, d. A1 is usually chosen as a single line segment or as the boundary of a regular polygon. Each line segment of A1 is replaced by a copy of A2, and then each line segment of the resulting polygonal arc is replaced by a copy of A2, and so on. The constructions are achieved by interpreting certain replacement rules for sequences as replacement rules for line segments [1].