import javax.vecmath.*;
import java.util.*; // Vector

class ParametricCurve {
	Vector pointList;
	Vector timeList;
	float epsilon;
	float t0;
	float t1;
	Function3f fun;

	public ParametricCurve ( float tZero, float tOne, float e, Function3f f ) {
		t0 = tZero;
		t1 = tOne;
		epsilon = e;
		fun = f;
		timeList = new Vector(64);
		timeList.addElement( new Float(t0) );
		pointList = new Vector(64);
		Vector3f v = fun.valueAt(t0);
		pointList.addElement( v );
		buildVector ( t1 );
	}

	public void buildVector ( float t1 ) {
		float t0 = ((Float)timeList.lastElement()).floatValue();
		while ( Math.abs ( t1 - t0 ) >= epsilon ) {
			buildVector ( (t0 + t1)/2 );
			t0 = ((Float)timeList.lastElement()).floatValue();
		}
		Vector3f v0 = (Vector3f)pointList.lastElement();
		t0 = ((Float)timeList.lastElement()).floatValue();
		Vector3f v1 = fun.valueAt(t1);
		while ( ! v1.epsilonEquals( v0, epsilon ) ) {
			buildVector ( (t0 + t1)/2 );
			t0 = ((Float)timeList.lastElement()).floatValue();
			v0 = (Vector3f)pointList.lastElement();
		}
		timeList.addElement(new Float(t1));
		pointList.addElement(v1);
	}

	public void print () {
		Enumeration p = pointList.elements();
		Enumeration t = timeList.elements();
		while ( p.hasMoreElements() ) {
			float f = ((Float) t.nextElement()).floatValue();
			Vector3f v = (Vector3f) p.nextElement();
			System.out.println ( "t = " + f + " v = " + v.toString() );
		}
	}

	public void draw ( WireMesh w ) {
		Enumeration p = pointList.elements();
		if ( !p.hasMoreElements() )
			return;
		Vector3f next = (Vector3f) p.nextElement();
		while ( p.hasMoreElements() ) {
			Vector3f prev = next;
			next = (Vector3f) p.nextElement();
			w.lineVector3f ( prev, next );
		}
	}

	public static void main ( String[] args ) {
		Function3f function = new Helix ( 1, 1 );
		ParametricCurve p = new ParametricCurve ( 0, 3, 0.25f, function );
		p.print();
	}
}