import javax.vecmath.*;

class Helix implements Function3f {
	float r;
	float a;

	Helix ( float radius, float aIn ) {
		r = radius;
		a = aIn;
	}

	public Vector3f valueAt ( float t ) {
		return new Vector3f ( r * (float) Math.cos ( 2 * t * Math.PI ),
			r * (float) Math.sin ( 2 * t * Math.PI ), a * t );
	}
}