24 lines
476 B
JavaScript
24 lines
476 B
JavaScript
|
var mathUtil = {};
|
||
|
|
|
||
|
|
mathUtil.isPowerOfTwo = function (value) {
|
||
|
|
return (value & (value - 1)) === 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
mathUtil.nextPowerOfTwo = function (value) {
|
||
|
|
value --;
|
||
|
|
value |= value >> 1;
|
||
|
|
value |= value >> 2;
|
||
|
|
value |= value >> 4;
|
||
|
|
value |= value >> 8;
|
||
|
|
value |= value >> 16;
|
||
|
|
value ++;
|
||
|
|
|
||
|
|
return value;
|
||
|
|
};
|
||
|
|
|
||
|
|
mathUtil.nearestPowerOfTwo = function (value) {
|
||
|
|
return Math.pow( 2, Math.round( Math.log( value ) / Math.LN2 ) );
|
||
|
|
};
|
||
|
|
|
||
|
|
export default mathUtil;
|