Method calcLineMidPoint

geometry.js:51–57

( a, b )

    }

    static calcLineMidPoint( a, b ){
        const pt = {};
        pt.x = (a.x - b.x)/2 + b.x;
        pt.y = (a.y - b.y)/2 + b.y;

        return pt;
    }

    static calcPointAlongLine( a, b, delta ){
        const pt = {};