LCOV - code coverage report
 Current view: top level - globalscripts - random.js (source / functions) Hit Total Coverage Test: lcov.info Lines: 9 12 75.0 % Date: 2023-04-02 12:52:40 Functions: 4 7 57.1 %
 ` Line data Source code` ``` 1 : /** 2 : * Returns a pair of independent and normally distributed (zero mean, variance 1) random numbers. 3 : * Uses the Polar-Rejection method. 4 : */ 5 : function randomNormal2D() 6 : { 7 : let s, a, b; 8 1 : do 9 : { 10 1 : a = 2 * Math.random() - 1; 11 1 : b = 2 * Math.random() - 1; 12 1 : s = a * a + b * b; 13 : } while (s>=1 || s==0); 14 1 : s = Math.sqrt(-2 * Math.log(s) / s); 15 1 : return [a * s, b * s]; 16 : } 17 : 18 : /** 19 : * Return a random element of the source array. 20 : */ 21 : function pickRandom(source) 22 : { 23 1675267 : return source.length ? source[Math.floor(source.length * Math.random())] : undefined; 24 : } 25 : 26 : /** 27 : * Return a random floating point number in the interval [min, max). 28 : */ 29 : function randFloat(min, max) 30 : { 31 74 : return min + Math.random() * (max - min); 32 : } 33 : 34 : /** 35 : * Return a random integer of the interval [floor(min) .. ceil(max)] using Math.random library. 36 : * 37 : * If an argument is not integer, the uniform distribution is cut off at that endpoint. 38 : * For example randIntInclusive(1.5, 2.5) yields 50% chance to get 2 and 25% chance for 1 and 3. 39 : */ 40 : function randIntInclusive(min, max) 41 : { 42 0 : return Math.floor(min + Math.random() * (max + 1 - min)); 43 : } 44 : 45 : /** 46 : * Return a random integer of the interval [floor(min) .. ceil(max-1)]. 47 : * 48 : * If an argument is not integer, the uniform distribution is cut off at that endpoint. 49 : * For example randIntExclusive(1.5, 3.5) yields 50% chance to get 2 and 25% chance for 1 and 3. 50 : */ 51 : function randIntExclusive(min, max) 52 : { 53 0 : return Math.floor(min + Math.random() * (max - min)); 54 : } 55 : 56 : /** 57 : * Returns a Bernoulli distributed boolean with p chance on true. 58 : */ 59 : function randBool(p = 0.5) 60 : { 61 5 : return Math.random() < p; 62 : } 63 : 64 : /** 65 : * Returns a random radians between 0 and 360 degrees. 66 : */ 67 : function randomAngle() 68 : { 69 0 : return randFloat(0, 2 * Math.PI); 70 : } ```

 Generated by: LCOV version 1.14