isBitAligned
isBitAligned(a: number, maxBitLength: number, gridSpacingExponent: number): boolean
Defined in double-representation/is-bit-aligned.ts:33
Returns true if the given number is bit-aligned in the sense that its a multiple of a given power of 2, say e, and such that the number, say a, conforms to: a/2^e < 2^(l-e), where l is the max allowed bit length. This essentially means the numbers act somewhat like fixed-point numbers which can drastically speed up some geometric algorithms and also reduce their complexity.
Visually:
These numbers (a,b and c) are grid aligned with e === 3 and max
bitlength === 6:
a -> 00|101100|000
b -> 00|000100|000
c -> 00|110111|000
These are not
a -> 01|101100|000
b -> 00|000100|000
These are not
a -> 00|101100|000
b -> 00|000100|100
These are not
a -> 00|101100|100
b -> 00|000100|100
Parameters:
| Name | Type | Description |
|---|---|---|
a | number | - |
maxBitLength | number | The max allowed bitlength |
gridSpacingExponent | number | The grid spacing === 1^gridSpacingExponent |
Returns: boolean