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1、23.3课题学习图案设计SubjectlearningpatterndesignGuidanceoflearningStudydesign,shouldfirstdeepthoroughunderstandingofthreekindsofcommonlyusedgraphicstransformat!ons(translation,rotation,symmetry)effect・Thenfigureoutthreeelementsofdesign:oneistomakeclearofthedesignintent:twoistoclearthebasicgraph
2、icdesignforagivenpattern;thethreeistofindouttheneedoftheimplementationofbasicgraphicstransformwhatandhowtotransform.ThinkingintegrationAnalyticemphasisFlexibleuseoftranslation,rotation,axialsymmetryandotherchangesinpatterndesignThepatterndesignisthroughgraphictransformation(translation,
3、rotation,axisymmetriccombinationorseveral)thenewgraphicsbasicgraphiccompositionhasacertainsignificance,designnotonlytoseewhetherthecorrectuseofgraphicstransfomiation,butalsothepatternisverywe11reflectedinthedesignintent・[case1]usethegraphicsgiveninfigures23-3-1toillustratethedesignandex
4、plainthemeaningofthedesignTheanalysiscanbecombinedintomeaningfulnewpatternsbytranslation,rotation,andaxialsymmetryoftwofiguresinFigure23-3-1ThesolutionisshowninFigure23-3-2Thisdesigninstructionforms,toinnovative,beautifuldesignandclosetothereallife・AnalysisdifficultyAnalyzetheformationo
5、fpatternsAnalysisoftheformingprocessofthepatternismainlytransformrelationship,analysispatternbetweentheaxialsymmetry,generallyreferstothecombinationoftranslationandrotationofthesetransformations・Andthisisthecommonseveraltransformationtheytransformpatternsaretochangeposition,graphicscong
6、ruent・_2]casesinFigure233-3,howwillthepatternmovedtotheleftonthepatternsothattheycoincide・TherearemanywaystoparseSolution:therighttoapatternofthecenterasthecenterofrotation,thepattern90anticlockwise,thenrotatebetweenrightaftertheleftshiftpatterntwopatterninthecenterdistanee,canmakethetw
7、opatternscoincide・Solutiontwo:firsttherightofthepatterntotheleft,thecenterofthedistancebetweenthetwopatterns,andthenthetranslationofthepatterntoitscenterasthecenterofrotation,counterclockwiserotationof90degrees,butalsotomakethetwopatternscoincideSolutionthree:takethecenterofthe
