number-util
The following methods are exported:
-
intBitsToFloat
- Returns a float for the given int bits.
-
floatToIntBits
- Returns int bits for the given float.
-
intToFloatColor
- Returns a single float representing the given ABGR integer. Some precision is lost.
-
colorToFloat
- Returns a single float representing the given R, G, B, and A bytes (0 - 255). Some precision is lost.
-
isPowerOfTwo
- Returns true if the number is a power-of-two size
-
nextPowerOfTwo
- Returns the next highest power-of-two size from the given number
example
var util = require('number-util');
//packs the RGBA color red into a single float
var color = util.colorToFloat(255, 0, 0, 255);
use
In WebGL, it's often desirable to pack RGBA data into a single float to reduce buffer upload bandwidth, at the expense of some precision loss.
how
Typed arrays are used to perform the casting.