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Clean up Numerical code a bit.

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This commit is contained in:
Jürg Lehni 2015-10-02 18:56:41 -05:00
parent f6f9d963eb
commit 00f1d5089f
1 changed files with 4 additions and 4 deletions
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8
src/util/Numerical.js
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@ -121,7 +121,7 @@ var Numerical = new function() {
* Numerical.EPSILON. * Numerical.EPSILON.
*/ */
isZero: function(val) { isZero: function(val) {
return abs(val) <= EPSILON; return val >= -EPSILON && val <= EPSILON;
}, },
/** /**
@ -180,7 +180,7 @@ var Numerical = new function() {
* *
* References: * References:
* Kahan W. - "To Solve a Real Cubic Equation" * Kahan W. - "To Solve a Real Cubic Equation"
* http://www.cs.berkeley.edu/~wkahan/Math128/Cubic.pdf * http://www.cs.berkeley.edu/~wkahan/Math128/Cubic.pdf
* Blinn J. - "How to solve a Quadratic Equation" * Blinn J. - "How to solve a Quadratic Equation"
* *
* @param {Number} a the quadratic term * @param {Number} a the quadratic term
@ -212,8 +212,8 @@ var Numerical = new function() {
// We multiply with a factor to normalize the coefficients. // We multiply with a factor to normalize the coefficients.
// The factor is just the nearest exponent of 10, big enough // The factor is just the nearest exponent of 10, big enough
// to raise all the coefficients to nearly [-1, +1] range. // to raise all the coefficients to nearly [-1, +1] range.
var mult = pow(10, abs( var mult = pow(10,
Math.floor(Math.log(gmC) * Math.LOG10E))); abs(Math.floor(Math.log(gmC) * Math.LOG10E)));
if (!isFinite(mult)) if (!isFinite(mult))
mult = 0; mult = 0;
a *= mult; a *= mult;