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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Wrapping (graphics) ： ウィキペディア英語版 Wrapping (graphics) In computer graphics, wrapping is the process of limiting a position to an area. A good example of wrapping is wallpaper, a single pattern repeated indefinitely over a wall. Wrapping is used in 3D computer graphics to repeat a texture over a polygon, eliminating the need for large textures or multiple polygons. To wrap a position ''x'' to an area of width ''w'', calculate the value $x\text{'}\; \backslash equiv\; x\; \backslash pmod$. ==Implementation== For computational purposes the wrapped value ''x of ''x'' can be expressed as :$x\text{'}\; =\; x\; -\; \backslash lfloor\; (x\; -\; x\_)\; /\; (x\_\; -\; x\_)\; \backslash rfloor$ * (x_ - x_) where $x\_$ is the highest value in the range, and $x\_$ is the lowest value in the range. Pseudocode for wrapping of a value to a range other than 0-1 is function wrap(X, Min, Max: Real): Real; X := X - Int((X - Min) / (Max - Min)) * (Max - Min); if X < 0 then //This corrects the problem caused by using Int instead of Floor X := X + Max - Min; return X; Pseudocode for wrapping of a value to a range of 0-1 is function wrap(X: Real): Real; X := X - Int(X); if X < 0 then X := X + 1; return X; Pseudocode for wrapping of a value to a range of 0-1 without branching is, function wrap(X: Real): Real; return ((X mod 1.0) + 1.0) mod 1.0; 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wrapping (graphics)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.