number-util

JS utility for intBitsToFloat, floatToIntBits, etc

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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.