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Size: 1.78 KB

Versions: 3

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Stored size: 1.78 KB

Contents

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define(['Core/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 (typeof point === 'undefined' || typeof p0 === 'undefined' || typeof p1 === 'undefined' || typeof p2 === 'undefined') {
            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

3 entries across 3 versions & 1 rubygems

Version Path
cesium-0.24.0 test/dummy/tmp/cache/assets/D4B/E90/sprockets%2F51d49f9bc2549684e6da91a4e0bc379b
cesium-0.23.0 test/dummy/tmp/cache/assets/D4B/E90/sprockets%2F51d49f9bc2549684e6da91a4e0bc379b
cesium-0.22.0 test/dummy/tmp/cache/assets/D4B/E90/sprockets%2F51d49f9bc2549684e6da91a4e0bc379b