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Size: 1.68 KB
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Stored size: 1.68 KB
Contents
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class:EFI"BundledAsset;FI"logical_path;FI""Core/pointInsideTriangle2D.js;TI"
pathname;FI"S/Users/bogumil/www/cesium/app/assets/javascripts/Core/pointInsideTriangle2D.js;TI"content_type;FI"application/javascript;FI"
mtime;FI" 2013-02-24T17:09:01+01:00;FI" length;FipI" digest;F"%422e29b0375adde4037229fecaf1ffb5I" source;FI"p/*global define*/
define(['./DeveloperError'], function(DeveloperError) {
"use strict";
/**
* DOC_TBA
*
* @param point
* @param p0
* @param p1
* @param p2
*
* @exports pointInsideTriangle2D
*
* @exception {DeveloperError} point, p0, p1, and p2 are required.
*/
var pointInsideTriangle2D = function(point, p0, p1, p2) {
if (!point || !p0 || !p1 || !p2) {
throw new DeveloperError('point, p0, p1, and p2 are required.');
}
// Implementation based on http://www.blackpawn.com/texts/pointinpoly/default.html.
var v0 = p1.subtract(p0);
var v1 = p2.subtract(p0);
var v2 = point.subtract(p0);
var dot00 = v0.dot(v0);
var dot01 = v0.dot(v1);
var dot02 = v0.dot(v2);
var dot11 = v1.dot(v1);
var dot12 = v1.dot(v2);
var q = 1.0 / (dot00 * dot11 - dot01 * dot01);
var u = (dot11 * dot02 - dot01 * dot12) * q;
var v = (dot00 * dot12 - dot01 * dot02) * q;
return (u > 0) && (v > 0) && (u + v < 1);
};
return pointInsideTriangle2D;
});
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Version data entries
5 entries across 5 versions & 1 rubygems