TVector3d.java

//
// vector class
//
// provides 3d vectors to Vertex
//

public class TVector3d
{
	// components of the vector
	private float _X;
	private float _Y;
	private float _Z;

	// constuctors
	public TVector3d (double X, double Y, double Z)
	{
		_X = (float)X;
		_Y = (float)Y;
		_Z = (float)Z;
	}

	public TVector3d (float X, float Y, float Z)
	{
		_X = X;
		_Y = Y;
		_Z = Z;
	}

	// selectors
	public float X()
	{
		return _X;
	}

	public float Y()
	{
		return _Y;
	}

	public float Z()
	{
		return _Z;
	}
 
	// operations

	// length
	public float Length()
	{
		return (float)(Math.sqrt( (_X * _X) + (_Y * _Y) + (_Z * _Z) ));
	} 

	// unit
	public void Unit()
	{
		float Length = this.Length();

		_X = _X / Length;
		_Y = _Y / Length;
		_Z = _Z / Length;
	}


	// fix length
	public void FixLength(float Length)
	{
		this.Unit();

		_X = _X * Length;
		_Y = _Y * Length;
		_Z = _Z * Length;
	}

	// Is Equal
	public boolean IsEqual(TVector3d B)
	{
		if ( (_X == B.X()) && (_Y == B.Y()) && (_Z == B.Z()) )
		{
			return true;
		}
		else
		{
			return false;
		}
	}
}