1.0.3 • Published 10 years ago

number-util v1.0.3

Weekly downloads
33
License
MIT
Repository
github
Last release
10 years ago

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.