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[BUGFIX] Util math

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Martin Geno 2017-03-10 14:39:06 +01:00 committed by Xaver Maierhofer
parent 577f227957
commit f265901036
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1 changed files with 27 additions and 25 deletions
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52
lib/utils/math.js
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@ -1,29 +1,31 @@
define(function () {
return {
distance: function distance(a, b) {
return Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2);
},
var self = {};
distancePoint: function distancePoint(a, b) {
return Math.sqrt(distance(a, b));
},
distanceLink: function distanceLink(p, a, b) {
/* http://stackoverflow.com/questions/849211 */
var l2 = distance(a, b);
if (l2 === 0) {
return distance(p, a);
}
var t = ((p.x - a.x) * (b.x - a.x) + (p.y - a.y) * (b.y - a.y)) / l2;
if (t < 0) {
return distance(p, a);
} else if (t > 1) {
return distance(p, b);
}
return distancePoint(p, {
x: a.x + t * (b.x - a.x),
y: a.y + t * (b.y - a.y)
});
}
self.distance = function distance(a, b) {
return Math.pow(a.x - b.x, 2) + Math.pow(a.y - b.y, 2);
};
self.distancePoint = function distancePoint(a, b) {
return Math.sqrt(self.distance(a, b));
};
self.distanceLink = function distanceLink(p, a, b) {
/* http://stackoverflow.com/questions/849211 */
var l2 = self.distance(a, b);
if (l2 === 0) {
return self.distance(p, a);
}
var t = ((p.x - a.x) * (b.x - a.x) + (p.y - a.y) * (b.y - a.y)) / l2;
if (t < 0) {
return self.distance(p, a);
} else if (t > 1) {
return self.distance(p, b);
}
return self.distancePoint(p, {
x: a.x + t * (b.x - a.x),
y: a.y + t * (b.y - a.y)
});
};
return self;
});