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functions:mod [2017/04/15 17:28] – removed korshun | functions:mod [2017/07/15 15:13] (current) – korshun | ||
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+ | ====== mod ====== | ||
+ | {{tag> | ||
+ | '' | ||
+ | [[: | ||
+ | |||
+ | ===== Description ===== | ||
+ | This function implements modulo division '' | ||
+ | |||
+ | This makes its result safe to use an array index, as the result is not negative for negative values of '' | ||
+ | |||
+ | Only positive values of '' | ||
+ | |||
+ | ===== Examples ===== | ||
+ | < | ||
+ | mod(-5, 3) -> 1 | ||
+ | mod(-4, 3) -> 2 | ||
+ | mod(-3, 3) -> 0 | ||
+ | mod(-2, 3) -> 1 | ||
+ | mod(-1, 3) -> 2 | ||
+ | mod(0, 3) -> 0 | ||
+ | mod(1, 3) -> 1 | ||
+ | mod(2, 3) -> 2 | ||
+ | mod(3, 3) -> 0 | ||
+ | mod(4, 3) -> 1 | ||
+ | mod(5, 3) -> 2 | ||
+ | </ | ||
+ | |||
+ | Using mod to implement menu cycling easily: | ||
+ | |||
+ | < | ||
+ | if (KeyPressed(BT_DOWN)) | ||
+ | menuindex++; | ||
+ | if (KeyPressed(BT_UP)) | ||
+ | menuindex--; | ||
+ | | ||
+ | menuindex = mod(menuindex, | ||
+ | </ |