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lwe/vector.js

Created December 2, 2010 15:59
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Winkel zwischen zwei Geraden (AB und CD)
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vector.js
// A(x1|y1) und B(x2|y2) = Touch start
// C(x3|y3) und D(x4|y3) = Current touch point
// Vektor AB
var AB_x = x2 - x1;
var AB_y = y2 - y1;
// Vektor CD
var CD_x = x4 - x3;
var CD_y = y4 - y3;
var ort = ((AB_x * CD_x) + (AB_y * CD_y)) / (Math.sqrt(Math.pow(AB_x, 2) + Math.pow(AB_y, 2)) * Math.sqrt(Math.pow(CD_x, 2) + Math.pow(CD_y, 2)));
var deg = Math.acos(ort) / Math.PI * 180.0;
@4stern
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4stern commented Nov 27, 2015

You have an error on your comment in row 2 -> D(x4|y4)

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