intersectLineCircle

Test whether the line defined by the two points <code>(x0, y0)</code> and <code>(x1, y1)</code> intersects the circle with center <code>(centerX, centerY)</code> and <code>radius</code>, and store the center of the line segment of intersection in the <code>(x, y)</code> components of the supplied vector and the half-length of that line segment in the z component. <p> Reference: <a href="http://math.stackexchange.com/questions/943383/determine-circle-of-intersection-of-plane-and-sphere">http://math.stackexchange.com</a>

@param x0 the x coordinate of the first point on the line @param y0 the y coordinate of the first point on the line @param x1 the x coordinate of the second point on the line @param y1 the y coordinate of the second point on the line @param centerX the x coordinate of the circle's center @param centerY the y coordinate of the circle's center @param radius the radius of the circle @param intersectionCenterAndHL will hold the center of the line segment of intersection in the <code>(x, y)</code> components and the half-length in the z component @return <code>true</code> iff the line intersects the circle; <code>false</code> otherwise