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Merge pull request #865 from woutercommandeur/dev

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Fix Phaser.Line.intersectsPoints for floating point inaccuracy.
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Richard Davey 2014-06-02 00:47:05 +01:00
commit c025b95959
1 changed files with 7 additions and 2 deletions
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9
src/geom/Line.js
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@ -375,8 +375,13 @@ Phaser.Line.intersectsPoints = function (a, b, e, f, asSegment, result) {
return null;
}
result.x = ((b1 * c2) - (b2 * c1)) / denom;
result.y = ((a2 * c1) - (a1 * c2)) / denom;
/*
Round to 3 decimals here, due to javascript floating point is 'broken'
http://stackoverflow.com/questions/11832914/round-to-at-most-2-decimal-places-in-javascript
See workaround explanation there in accepted answer there..
*/
result.x = Math.round( ((((b1 * c2) - (b2 * c1)) / denom)+0.00001)*1000 ) / 1000;
result.y = Math.round( ((((a2 * c1) - (a1 * c2)) / denom)+0.00001)*1000 ) / 1000;
if (asSegment)
{