Method calcPointOnCircle

geometry.js:73–77

( cx, cy, radius, theta )

    }

    static calcPointOnCircle( cx, cy, radius, theta ){
        const x = Math.cos( theta ) * radius + cx;
        const y = Math.sin( theta ) * radius + cy;
        return { x, y };
    }

    static calcAngleFromXAxis( org, pt ){
        const x = pt.x - org.x;