RNLength R2Distance(const R2Point& point, const R2Ray& ray)
{
// Check if start point is closest
R2Vector v = point - ray.Start();
RNScalar dir = v.Dot(ray.Vector());
if (RNIsNegative(dir)) return v.Length();
// Return distance from point to ray line
return R2Distance(point, ray.Line());
}
RNLength R2SquaredDistance(const R2Point& point1, const R2Point& point2)
{
// Return squared length of vector between points
R2Vector v = point1 - point2;
return v.Dot(v);
}