(x', y')^T = ((cosθ, -sinθ), (sinθ, cosθ)) * (x, y)^T
(multiplied out)
- x' = x cosθ - y sinθ
- y' = x sinθ + y cosθ
Gábor Siffel hugabor
hugabor
/ tree-structure-pure-css.html
Created
February 9, 2021 09:00
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| <html> | |
| <head> | |
| <style> | |
| /* Edit this to customize font-size and other font properties */ | |
| ul.tree-structure { | |
| font-size: 1em; | |
| font-family: inherit; | |
| } |
hugabor
/ RotateAroundCenterpoint.md
Created
January 5, 2021 03:25
hugabor
/ crackthecode.py
Created
April 20, 2020 19:27
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| # create all combinations | |
| p_0 = [] | |
| for a in range(10): | |
| for b in range(10): | |
| for c in range(10): | |
| p_0.append([a, b, c]) | |
| # hint 1 |
hugabor
/ PEM_armor_stripping_regex
Created
July 25, 2018 00:19
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| /BEGIN.*-+([^-]*)-+END/g |
hugabor
/ ChemicalCompoundLexer.js
Created
March 23, 2017 01:27
Returns a list of tokens from a string of a chemical compound
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| const UPPERCASE_LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('') | |
| const LOWERCASE_LETTERS = 'abcdefghijklmnopqrstuvwxyz'.split('') | |
| const DIGITS = '0123456789'.split('') | |
| const WHITESPACE = ' '.split('') | |
| // TOKEN TYPES | |
| const COEFF = 'COEFF' | |
| const ELEM = 'ELEM' |
hugabor
/ NumStringUtil.js
Last active
October 11, 2016 19:02
Basic, often-used functions for stringifying positive numbers (in JavaScript)
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| let fixLength = function(num, length) { | |
| let numStr = "" + num; | |
| if (parseInt(numStr, 10) < 0) return fixLength(0, length); | |
| while (numStr.length < length) { | |
| numStr = "0" + numStr; | |
| } | |
| return numStr; | |
| }; |
hugabor
/ NumStringUtil.java
Last active
October 11, 2016 19:04
Basic, often-used functions for stringifying positive numbers (in Java)
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| public final class NumStringUtil { | |
| private NumStringUtil() {} | |
| /** | |
| * If the number string given has length less than the desired length, then | |
| * the string is left-padded with zeroes and returned. | |
| * | |
| * @param numStr string to left-pad with zeroes |