Function getDistance

docs/app/js/sanddance-app.js:93024–93028

* calculate the absolute distance between two points * @param {Object} p1 {x, y} * @param {Object} p2 {x, y} * @param {Array} [props] containing x and y keys * @return {Number} distance

(p1, p2, props)

 * @param {Array} [props] containing x and y keys
 * @return {Number} distance
 */ function getDistance(p1, p2, props) {
        if (!props) props = PROPS_XY;
        var x = p2[props[0]] - p1[props[0]], y = p2[props[1]] - p1[props[1]];
        return Math.sqrt(x * x + y * y);
    }
    /**
 * calculate the angle between two coordinates
 * @param {Object} p1